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powerpc updates for 5.2 

Highlights:
 
  - Support for Kernel Userspace Access/Execution Prevention (like
    SMAP/SMEP/PAN/PXN) on some 64-bit and 32-bit CPUs. This prevents the kernel
    from accidentally accessing userspace outside copy_to/from_user(), or
    ever executing userspace.
 
  - KASAN support on 32-bit.
 
  - Rework of where we map the kernel, vmalloc, etc. on 64-bit hash to use the
    same address ranges we use with the Radix MMU.
 
  - A rewrite into C of large parts of our idle handling code for 64-bit Book3S
    (ie. power8 & power9).
 
  - A fast path entry for syscalls on 32-bit CPUs, for a 12-17% speedup in the
    null_syscall benchmark.
 
  - On 64-bit bare metal we have support for recovering from errors with the time
    base (our clocksource), however if that fails currently we hang in __delay()
    and never crash. We now have support for detecting that case and short
    circuiting __delay() so we at least panic() and reboot.
 
  - Add support for optionally enabling the DAWR on Power9, which had to be
    disabled by default due to a hardware erratum. This has the effect of
    enabling hardware breakpoints for GDB, the downside is a badly behaved
    program could crash the machine by pointing the DAWR at cache inhibited
    memory. This is opt-in obviously.
 
  - xmon, our crash handler, gets support for a read only mode where operations
    that could change memory or otherwise disturb the system are disabled.
 
 Plus many clean-ups, reworks and minor fixes etc.
 
 Thanks to:
   Christophe Leroy, Akshay Adiga, Alastair D'Silva, Alexey Kardashevskiy, Andrew
   Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anton Blanchard, Ben Hutchings,
   Bo YU, Breno Leitao, Cédric Le Goater, Christopher M. Riedl, Christoph
   Hellwig, Colin Ian King, David Gibson, Ganesh Goudar, Gautham R. Shenoy,
   George Spelvin, Greg Kroah-Hartman, Greg Kurz, Horia Geantă, Jagadeesh
   Pagadala, Joel Stanley, Joe Perches, Julia Lawall, Laurentiu Tudor, Laurent
   Vivier, Lukas Bulwahn, Madhavan Srinivasan, Mahesh Salgaonkar, Mathieu
   Malaterre, Michael Neuling, Mukesh Ojha, Nathan Fontenot, Nathan Lynch,
   Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Peng Hao, Qian Cai, Ravi
   Bangoria, Rick Lindsley, Russell Currey, Sachin Sant, Stewart Smith, Sukadev
   Bhattiprolu, Thomas Huth, Tobin C. Harding, Tyrel Datwyler, Valentin
   Schneider, Wei Yongjun, Wen Yang, YueHaibing.
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Merge tag 'powerpc-5.2-1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Slightly delayed due to the issue with printk() calling
  probe_kernel_read() interacting with our new user access prevention
  stuff, but all fixed now.

  The only out-of-area changes are the addition of a cpuhp_state, small
  additions to Documentation and MAINTAINERS updates.

  Highlights:

   - Support for Kernel Userspace Access/Execution Prevention (like
     SMAP/SMEP/PAN/PXN) on some 64-bit and 32-bit CPUs. This prevents
     the kernel from accidentally accessing userspace outside
     copy_to/from_user(), or ever executing userspace.

   - KASAN support on 32-bit.

   - Rework of where we map the kernel, vmalloc, etc. on 64-bit hash to
     use the same address ranges we use with the Radix MMU.

   - A rewrite into C of large parts of our idle handling code for
     64-bit Book3S (ie. power8 & power9).

   - A fast path entry for syscalls on 32-bit CPUs, for a 12-17% speedup
     in the null_syscall benchmark.

   - On 64-bit bare metal we have support for recovering from errors
     with the time base (our clocksource), however if that fails
     currently we hang in __delay() and never crash. We now have support
     for detecting that case and short circuiting __delay() so we at
     least panic() and reboot.

   - Add support for optionally enabling the DAWR on Power9, which had
     to be disabled by default due to a hardware erratum. This has the
     effect of enabling hardware breakpoints for GDB, the downside is a
     badly behaved program could crash the machine by pointing the DAWR
     at cache inhibited memory. This is opt-in obviously.

   - xmon, our crash handler, gets support for a read only mode where
     operations that could change memory or otherwise disturb the system
     are disabled.

  Plus many clean-ups, reworks and minor fixes etc.

  Thanks to: Christophe Leroy, Akshay Adiga, Alastair D'Silva, Alexey
  Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar,
  Anton Blanchard, Ben Hutchings, Bo YU, Breno Leitao, Cédric Le Goater,
  Christopher M. Riedl, Christoph Hellwig, Colin Ian King, David Gibson,
  Ganesh Goudar, Gautham R. Shenoy, George Spelvin, Greg Kroah-Hartman,
  Greg Kurz, Horia Geantă, Jagadeesh Pagadala, Joel Stanley, Joe
  Perches, Julia Lawall, Laurentiu Tudor, Laurent Vivier, Lukas Bulwahn,
  Madhavan Srinivasan, Mahesh Salgaonkar, Mathieu Malaterre, Michael
  Neuling, Mukesh Ojha, Nathan Fontenot, Nathan Lynch, Nicholas Piggin,
  Nick Desaulniers, Oliver O'Halloran, Peng Hao, Qian Cai, Ravi
  Bangoria, Rick Lindsley, Russell Currey, Sachin Sant, Stewart Smith,
  Sukadev Bhattiprolu, Thomas Huth, Tobin C. Harding, Tyrel Datwyler,
  Valentin Schneider, Wei Yongjun, Wen Yang, YueHaibing"

* tag 'powerpc-5.2-1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (205 commits)
  powerpc/64s: Use early_mmu_has_feature() in set_kuap()
  powerpc/book3s/64: check for NULL pointer in pgd_alloc()
  powerpc/mm: Fix hugetlb page initialization
  ocxl: Fix return value check in afu_ioctl()
  powerpc/mm: fix section mismatch for setup_kup()
  powerpc/mm: fix redundant inclusion of pgtable-frag.o in Makefile
  powerpc/mm: Fix makefile for KASAN
  powerpc/kasan: add missing/lost Makefile
  selftests/powerpc: Add a signal fuzzer selftest
  powerpc/booke64: set RI in default MSR
  ocxl: Provide global MMIO accessors for external drivers
  ocxl: move event_fd handling to frontend
  ocxl: afu_irq only deals with IRQ IDs, not offsets
  ocxl: Allow external drivers to use OpenCAPI contexts
  ocxl: Create a clear delineation between ocxl backend & frontend
  ocxl: Don't pass pci_dev around
  ocxl: Split pci.c
  ocxl: Remove some unused exported symbols
  ocxl: Remove superfluous 'extern' from headers
  ocxl: read_pasid never returns an error, so make it void
  ...
This commit is contained in:
Linus Torvalds 2019-05-10 05:29:27 -07:00
parent 8ea5b2abd0 8150a153c0
commit b970afcfca
247 changed files with 7827 additions and 4566 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/admin-guide/kernel-parameters.txt
View File

@ -2875,11 +2875,11 @@
noexec=on: enable non-executable mappings (default)
noexec=off: disable non-executable mappings
nosmap [X86]
nosmap [X86,PPC]
Disable SMAP (Supervisor Mode Access Prevention)
even if it is supported by processor.
nosmep [X86]
nosmep [X86,PPC]
Disable SMEP (Supervisor Mode Execution Prevention)
even if it is supported by processor.

40
Documentation/powerpc/DAWR-POWER9.txt
View File

@ -1,10 +1,10 @@
DAWR issues on POWER9
============================
On POWER9 the DAWR can cause a checkstop if it points to cache
inhibited (CI) memory. Currently Linux has no way to disinguish CI
memory when configuring the DAWR, so (for now) the DAWR is disabled by
this commit:
On POWER9 the Data Address Watchpoint Register (DAWR) can cause a checkstop
if it points to cache inhibited (CI) memory. Currently Linux has no way to
disinguish CI memory when configuring the DAWR, so (for now) the DAWR is
disabled by this commit:
commit 9654153158d3e0684a1bdb76dbababdb7111d5a0
Author: Michael Neuling <mikey@neuling.org>
@ -56,3 +56,35 @@ POWER9. Loads and stores to the watchpoint locations will not be
trapped in GDB. The watchpoint is remembered, so if the guest is
migrated back to the POWER8 host, it will start working again.
Force enabling the DAWR
=============================
Kernels (since ~v5.2) have an option to force enable the DAWR via:
echo Y > /sys/kernel/debug/powerpc/dawr_enable_dangerous
This enables the DAWR even on POWER9.
This is a dangerous setting, USE AT YOUR OWN RISK.
Some users may not care about a bad user crashing their box
(ie. single user/desktop systems) and really want the DAWR. This
allows them to force enable DAWR.
This flag can also be used to disable DAWR access. Once this is
cleared, all DAWR access should be cleared immediately and your
machine once again safe from crashing.
Userspace may get confused by toggling this. If DAWR is force
enabled/disabled between getting the number of breakpoints (via
PTRACE_GETHWDBGINFO) and setting the breakpoint, userspace will get an
inconsistent view of what's available. Similarly for guests.
For the DAWR to be enabled in a KVM guest, the DAWR needs to be force
enabled in the host AND the guest. For this reason, this won't work on
POWERVM as it doesn't allow the HCALL to work. Writes of 'Y' to the
dawr_enable_dangerous file will fail if the hypervisor doesn't support
writing the DAWR.
To double check the DAWR is working, run this kernel selftest:
tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
Any errors/failures/skips mean something is wrong.

13
MAINTAINERS
View File

@ -4347,7 +4347,7 @@ F: drivers/net/ethernet/chelsio/cxgb4vf/
CXL (IBM Coherent Accelerator Processor Interface CAPI) DRIVER
M: Frederic Barrat <fbarrat@linux.ibm.com>
M: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
M: Andrew Donnellan <ajd@linux.ibm.com>
L: linuxppc-dev@lists.ozlabs.org
S: Supported
F: arch/powerpc/platforms/powernv/pci-cxl.c
@ -7483,13 +7483,12 @@ S: Supported
F: drivers/net/ethernet/ibm/ibmvnic.*
IBM Power Virtual Accelerator Switchboard
M: Sukadev Bhattiprolu
M: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
L: linuxppc-dev@lists.ozlabs.org
S: Supported
F: arch/powerpc/platforms/powernv/vas*
F: arch/powerpc/platforms/powernv/copy-paste.h
F: arch/powerpc/include/asm/vas.h
F: arch/powerpc/include/uapi/asm/vas.h
IBM Power Virtual Ethernet Device Driver
M: Thomas Falcon <tlfalcon@linux.ibm.com>
@ -7536,14 +7535,14 @@ F: drivers/crypto/vmx/ghash*
F: drivers/crypto/vmx/ppc-xlate.pl
IBM Power PCI Hotplug Driver for RPA-compliant PPC64 platform
M: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
M: Tyrel Datwyler <tyreld@linux.ibm.com>
L: linux-pci@vger.kernel.org
L: linuxppc-dev@lists.ozlabs.org
S: Supported
F: drivers/pci/hotplug/rpaphp*
IBM Power IO DLPAR Driver for RPA-compliant PPC64 platform
M: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
M: Tyrel Datwyler <tyreld@linux.ibm.com>
L: linux-pci@vger.kernel.org
L: linuxppc-dev@lists.ozlabs.org
S: Supported
@ -10498,7 +10497,7 @@ F: arch/arm/mach-mmp/
MMU GATHER AND TLB INVALIDATION
M: Will Deacon <will.deacon@arm.com>
M: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
M: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
M: Andrew Morton <akpm@linux-foundation.org>
M: Nick Piggin <npiggin@gmail.com>
M: Peter Zijlstra <peterz@infradead.org>
@ -11299,7 +11298,7 @@ F: tools/objtool/
OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER
M: Frederic Barrat <fbarrat@linux.ibm.com>
M: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
M: Andrew Donnellan <ajd@linux.ibm.com>
L: linuxppc-dev@lists.ozlabs.org
S: Supported
F: arch/powerpc/platforms/powernv/ocxl.c

10
arch/powerpc/Kconfig
View File

@ -167,6 +167,7 @@ config PPC
select GENERIC_TIME_VSYSCALL
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KASAN if PPC32
select HAVE_ARCH_KGDB
select HAVE_ARCH_MMAP_RND_BITS
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
@ -375,7 +376,6 @@ config ZONE_DMA
config PGTABLE_LEVELS
int
default 2 if !PPC64
default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
default 4
source "arch/powerpc/sysdev/Kconfig"
@ -391,7 +391,7 @@ source "kernel/Kconfig.hz"
config HUGETLB_PAGE_SIZE_VARIABLE
bool
depends on HUGETLB_PAGE
depends on HUGETLB_PAGE && PPC_BOOK3S_64
default y
config MATH_EMULATION
@ -832,9 +832,9 @@ config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
config CMDLINE
string "Initial kernel command string"
depends on CMDLINE_BOOL
default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
string "Initial kernel command string" if CMDLINE_BOOL
default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL
default ""
help
On some platforms, there is currently no way for the boot loader to
pass arguments to the kernel. For these platforms, you can supply

32
arch/powerpc/Kconfig.debug
View File

@ -117,6 +117,14 @@ config XMON_DISASSEMBLY
to say Y here, unless you're building for a memory-constrained
system.
config XMON_DEFAULT_RO_MODE
bool "Restrict xmon to read-only operations by default"
depends on XMON
default y
help
Operate xmon in read-only mode. The cmdline options 'xmon=rw' and
'xmon=ro' override this default.
config DEBUGGER
bool
depends on KGDB || XMON
@ -361,8 +369,32 @@ config PPC_PTDUMP
If you are unsure, say N.
config PPC_DEBUG_WX
bool "Warn on W+X mappings at boot"
depends on PPC_PTDUMP
help
Generate a warning if any W+X mappings are found at boot.
This is useful for discovering cases where the kernel is leaving
W+X mappings after applying NX, as such mappings are a security risk.
Note that even if the check fails, your kernel is possibly
still fine, as W+X mappings are not a security hole in
themselves, what they do is that they make the exploitation
of other unfixed kernel bugs easier.
There is no runtime or memory usage effect of this option
once the kernel has booted up - it's a one time check.
If in doubt, say "Y".
config PPC_FAST_ENDIAN_SWITCH
bool "Deprecated fast endian-switch syscall"
depends on DEBUG_KERNEL && PPC_BOOK3S_64
help
If you're unsure what this is, say N.
config KASAN_SHADOW_OFFSET
hex
depends on KASAN
default 0xe0000000

15
arch/powerpc/Makefile
View File

@ -34,11 +34,10 @@ ifdef CONFIG_PPC_BOOK3S_32
KBUILD_CFLAGS += -mcpu=powerpc
endif
ifeq ($(CROSS_COMPILE),)
KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
else
KBUILD_DEFCONFIG := ppc64_defconfig
endif
# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
# ppc64_defconfig because we have nothing better to go on.
uname := $(shell uname -m)
KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
ifdef CONFIG_PPC64
new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
@ -367,6 +366,10 @@ ppc32_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
-f $(srctree)/Makefile allmodconfig
PHONY += ppc_defconfig
ppc_defconfig:
$(call merge_into_defconfig,book3s_32.config,)
PHONY += ppc64le_allmodconfig
ppc64le_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
@ -406,7 +409,9 @@ vdso_install:
ifdef CONFIG_PPC64
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
endif
ifdef CONFIG_VDSO32
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
endif
archclean:
$(Q)$(MAKE) $(clean)=$(boot)

6
arch/powerpc/boot/addnote.c
View File

@ -223,7 +223,11 @@ main(int ac, char **av)
PUT_16(E_PHNUM, np + 2);
/* write back */
lseek(fd, (long) 0, SEEK_SET);
i = lseek(fd, (long) 0, SEEK_SET);
if (i < 0) {
perror("lseek");
exit(1);
}
i = write(fd, buf, n);
if (i < 0) {
perror("write");

1
arch/powerpc/boot/dts/fsl/b4qds.dtsi
View File

@ -40,6 +40,7 @@
interrupt-parent = <&mpic>;
aliases {
crypto = &crypto;
phy_sgmii_10 = &phy_sgmii_10;
phy_sgmii_11 = &phy_sgmii_11;
phy_sgmii_1c = &phy_sgmii_1c;

1
arch/powerpc/configs/pseries_defconfig
View File

@ -217,6 +217,7 @@ CONFIG_USB_MON=m
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_HCD_PPC_OF is not set
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_STORAGE=m
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=m

2
arch/powerpc/configs/skiroot_defconfig
View File

@ -163,6 +163,8 @@ CONFIG_S2IO=m
CONFIG_MLX4_EN=m
# CONFIG_MLX4_CORE_GEN2 is not set
CONFIG_MLX5_CORE=m
CONFIG_MLX5_CORE_EN=y
# CONFIG_MLX5_EN_RXNFC is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_MICROSEMI is not set
CONFIG_MYRI10GE=m

10
arch/powerpc/crypto/crc-vpmsum_test.c
View File

@ -78,16 +78,12 @@ static int __init crc_test_init(void)
pr_info("crc-vpmsum_test begins, %lu iterations\n", iterations);
for (i=0; i<iterations; i++) {
size_t len, offset;
size_t offset = prandom_u32_max(16);
size_t len = prandom_u32_max(MAX_CRC_LENGTH);
get_random_bytes(data, MAX_CRC_LENGTH);
get_random_bytes(&len, sizeof(len));
get_random_bytes(&offset, sizeof(offset));
len %= MAX_CRC_LENGTH;
offset &= 15;
if (len <= offset)
continue;
prandom_bytes(data, len);
len -= offset;
crypto_shash_update(crct10dif_shash, data+offset, len);

145
arch/powerpc/include/asm/book3s/32/kup.h Normal file
View File

@ -0,0 +1,145 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_32_KUP_H
#define _ASM_POWERPC_BOOK3S_32_KUP_H
#include <asm/book3s/32/mmu-hash.h>
#ifdef __ASSEMBLY__
.macro kuep_update_sr gpr1, gpr2 /* NEVER use r0 as gpr2 due to addis */
101: mtsrin \gpr1, \gpr2
addi \gpr1, \gpr1, 0x111 /* next VSID */
rlwinm \gpr1, \gpr1, 0, 0xf0ffffff /* clear VSID overflow */
addis \gpr2, \gpr2, 0x1000 /* address of next segment */
bdnz 101b
isync
.endm
.macro kuep_lock gpr1, gpr2
#ifdef CONFIG_PPC_KUEP
li \gpr1, NUM_USER_SEGMENTS
li \gpr2, 0
mtctr \gpr1
mfsrin \gpr1, \gpr2
oris \gpr1, \gpr1, SR_NX@h /* set Nx */
kuep_update_sr \gpr1, \gpr2
#endif
.endm
.macro kuep_unlock gpr1, gpr2
#ifdef CONFIG_PPC_KUEP
li \gpr1, NUM_USER_SEGMENTS
li \gpr2, 0
mtctr \gpr1
mfsrin \gpr1, \gpr2
rlwinm \gpr1, \gpr1, 0, ~SR_NX /* Clear Nx */
kuep_update_sr \gpr1, \gpr2
#endif
.endm
#ifdef CONFIG_PPC_KUAP
.macro kuap_update_sr gpr1, gpr2, gpr3 /* NEVER use r0 as gpr2 due to addis */
101: mtsrin \gpr1, \gpr2
addi \gpr1, \gpr1, 0x111 /* next VSID */
rlwinm \gpr1, \gpr1, 0, 0xf0ffffff /* clear VSID overflow */
addis \gpr2, \gpr2, 0x1000 /* address of next segment */
cmplw \gpr2, \gpr3
blt- 101b
isync
.endm
.macro kuap_save_and_lock sp, thread, gpr1, gpr2, gpr3
lwz \gpr2, KUAP(\thread)
rlwinm. \gpr3, \gpr2, 28, 0xf0000000
stw \gpr2, STACK_REGS_KUAP(\sp)
beq+ 102f
li \gpr1, 0
stw \gpr1, KUAP(\thread)
mfsrin \gpr1, \gpr2
oris \gpr1, \gpr1, SR_KS@h /* set Ks */
kuap_update_sr \gpr1, \gpr2, \gpr3
102:
.endm
.macro kuap_restore sp, current, gpr1, gpr2, gpr3
lwz \gpr2, STACK_REGS_KUAP(\sp)
rlwinm. \gpr3, \gpr2, 28, 0xf0000000
stw \gpr2, THREAD + KUAP(\current)
beq+ 102f
mfsrin \gpr1, \gpr2
rlwinm \gpr1, \gpr1, 0, ~SR_KS /* Clear Ks */
kuap_update_sr \gpr1, \gpr2, \gpr3
102:
.endm
.macro kuap_check current, gpr
#ifdef CONFIG_PPC_KUAP_DEBUG
lwz \gpr2, KUAP(thread)
999: twnei \gpr, 0
EMIT_BUG_ENTRY 999b, __FILE__, __LINE__, (BUGFLAG_WARNING | BUGFLAG_ONCE)
#endif
.endm
#endif /* CONFIG_PPC_KUAP */
#else /* !__ASSEMBLY__ */
#ifdef CONFIG_PPC_KUAP
#include <linux/sched.h>
static inline void kuap_update_sr(u32 sr, u32 addr, u32 end)
{
barrier(); /* make sure thread.kuap is updated before playing with SRs */
while (addr < end) {
mtsrin(sr, addr);
sr += 0x111; /* next VSID */
sr &= 0xf0ffffff; /* clear VSID overflow */
addr += 0x10000000; /* address of next segment */
}
isync(); /* Context sync required after mtsrin() */
}
static inline void allow_user_access(void __user *to, const void __user *from, u32 size)
{
u32 addr, end;
if (__builtin_constant_p(to) && to == NULL)
return;
addr = (__force u32)to;
if (!addr || addr >= TASK_SIZE || !size)
return;
end = min(addr + size, TASK_SIZE);
current->thread.kuap = (addr & 0xf0000000) | ((((end - 1) >> 28) + 1) & 0xf);
kuap_update_sr(mfsrin(addr) & ~SR_KS, addr, end); /* Clear Ks */
}
static inline void prevent_user_access(void __user *to, const void __user *from, u32 size)
{
u32 addr = (__force u32)to;
u32 end = min(addr + size, TASK_SIZE);
if (!addr || addr >= TASK_SIZE || !size)
return;
current->thread.kuap = 0;
kuap_update_sr(mfsrin(addr) | SR_KS, addr, end); /* set Ks */
}
static inline bool bad_kuap_fault(struct pt_regs *regs, bool is_write)
{
if (!is_write)
return false;
return WARN(!regs->kuap, "Bug: write fault blocked by segment registers !");
}
#endif /* CONFIG_PPC_KUAP */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_BOOK3S_32_KUP_H */

9
arch/powerpc/include/asm/book3s/32/mmu-hash.h
View File

@ -10,8 +10,6 @@
* BATs
*/
#include <asm/page.h>
/* Block size masks */
#define BL_128K 0x000
#define BL_256K 0x001
@ -49,8 +47,6 @@ struct ppc_bat {
u32 batu;
u32 batl;
};
typedef pte_t *pgtable_t;
#endif /* !__ASSEMBLY__ */
/*
@ -63,6 +59,11 @@ typedef pte_t *pgtable_t;
#define PP_RWRW 2 /* Supervisor read/write, User read/write */
#define PP_RXRX 3 /* Supervisor read, User read */
/* Values for Segment Registers */
#define SR_NX 0x10000000 /* No Execute */
#define SR_KP 0x20000000 /* User key */
#define SR_KS 0x40000000 /* Supervisor key */
#ifndef __ASSEMBLY__
/*

41
arch/powerpc/include/asm/book3s/32/pgalloc.h
View File

@ -5,28 +5,6 @@
#include <linux/threads.h>
#include <linux/slab.h>
/*
* Functions that deal with pagetables that could be at any level of
* the table need to be passed an "index_size" so they know how to
* handle allocation. For PTE pages (which are linked to a struct
* page for now, and drawn from the main get_free_pages() pool), the
* allocation size will be (2^index_size * sizeof(pointer)) and
* allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
*
* The maximum index size needs to be big enough to allow any
* pagetable sizes we need, but small enough to fit in the low bits of
* any page table pointer. In other words all pagetables, even tiny
* ones, must be aligned to allow at least enough low 0 bits to
* contain this value. This value is also used as a mask, so it must
* be one less than a power of two.
*/
#define MAX_PGTABLE_INDEX_SIZE 0xf
extern void __bad_pte(pmd_t *pmd);
extern struct kmem_cache *pgtable_cache[];
#define PGT_CACHE(shift) pgtable_cache[shift]
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
@ -59,24 +37,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
*pmdp = __pmd(__pa(pte_page) | _PMD_PRESENT);
}
#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd))
extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
extern pgtable_t pte_alloc_one(struct mm_struct *mm);
void pte_frag_destroy(void *pte_frag);
pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
void pte_fragment_free(unsigned long *table, int kernel);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
pte_fragment_free((unsigned long *)pte, 1);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pte_fragment_free((unsigned long *)ptepage, 0);
}
static inline void pgtable_free(void *table, unsigned index_size)
{
if (!index_size) {
@ -87,7 +47,6 @@ static inline void pgtable_free(void *table, unsigned index_size)
}
}
#define check_pgt_cache() do { } while (0)
#define get_hugepd_cache_index(x) (x)
#ifdef CONFIG_SMP

13
arch/powerpc/include/asm/book3s/32/pgtable.h
View File

@ -134,15 +134,24 @@ static inline bool pte_user(pte_t pte)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
#ifndef __ASSEMBLY__
int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
#endif /* !__ASSEMBLY__ */
/*
* This is the bottom of the PKMAP area with HIGHMEM or an arbitrary
* value (for now) on others, from where we can start layout kernel
* virtual space that goes below PKMAP and FIXMAP
*/
#include <asm/fixmap.h>
#ifdef CONFIG_HIGHMEM
#define KVIRT_TOP PKMAP_BASE
#else
#define KVIRT_TOP (0xfe000000UL) /* for now, could be FIXMAP_BASE ? */
#define KVIRT_TOP FIXADDR_START
#endif
/*
@ -373,8 +382,6 @@ static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 3 })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 3 })
int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
/* Generic accessors to PTE bits */
static inline int pte_write(pte_t pte) { return !!(pte_val(pte) & _PAGE_RW);}
static inline int pte_read(pte_t pte) { return 1; }

23
arch/powerpc/include/asm/book3s/64/hash-4k.h
View File

@ -2,10 +2,10 @@
#ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H
#define _ASM_POWERPC_BOOK3S_64_HASH_4K_H
#define H_PTE_INDEX_SIZE 9
#define H_PMD_INDEX_SIZE 7
#define H_PUD_INDEX_SIZE 9
#define H_PGD_INDEX_SIZE 9
#define H_PTE_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps: 2^9 x 4KB = 2MB
#define H_PMD_INDEX_SIZE 7 // size: 8B << 7 = 1KB, maps: 2^7 x 2MB = 256MB
#define H_PUD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps: 2^9 x 256MB = 128GB
#define H_PGD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps: 2^9 x 128GB = 64TB
/*
* Each context is 512TB. But on 4k we restrict our max TASK size to 64TB
@ -13,6 +13,21 @@
*/
#define MAX_EA_BITS_PER_CONTEXT 46
#define REGION_SHIFT (MAX_EA_BITS_PER_CONTEXT - 2)
/*
* Our page table limit us to 64TB. Hence for the kernel mapping,
* each MAP area is limited to 16 TB.
* The four map areas are: linear mapping, vmap, IO and vmemmap
*/
#define H_KERN_MAP_SIZE (ASM_CONST(1) << REGION_SHIFT)
/*
* Define the address range of the kernel non-linear virtual area
* 16TB
*/
#define H_KERN_VIRT_START ASM_CONST(0xc000100000000000)
#ifndef __ASSEMBLY__
#define H_PTE_TABLE_SIZE (sizeof(pte_t) << H_PTE_INDEX_SIZE)
#define H_PMD_TABLE_SIZE (sizeof(pmd_t) << H_PMD_INDEX_SIZE)

21
arch/powerpc/include/asm/book3s/64/hash-64k.h
View File

@ -2,16 +2,29 @@
#ifndef _ASM_POWERPC_BOOK3S_64_HASH_64K_H
#define _ASM_POWERPC_BOOK3S_64_HASH_64K_H
#define H_PTE_INDEX_SIZE 8
#define H_PMD_INDEX_SIZE 10
#define H_PUD_INDEX_SIZE 10
#define H_PGD_INDEX_SIZE 8
#define H_PTE_INDEX_SIZE 8 // size: 8B << 8 = 2KB, maps 2^8 x 64KB = 16MB
#define H_PMD_INDEX_SIZE 10 // size: 8B << 10 = 8KB, maps 2^10 x 16MB = 16GB
#define H_PUD_INDEX_SIZE 10 // size: 8B << 10 = 8KB, maps 2^10 x 16GB = 16TB
#define H_PGD_INDEX_SIZE 8 // size: 8B << 8 = 2KB, maps 2^8 x 16TB = 4PB
/*
* Each context is 512TB size. SLB miss for first context/default context
* is handled in the hotpath.
*/
#define MAX_EA_BITS_PER_CONTEXT 49
#define REGION_SHIFT MAX_EA_BITS_PER_CONTEXT
/*
* We use one context for each MAP area.
*/
#define H_KERN_MAP_SIZE (1UL << MAX_EA_BITS_PER_CONTEXT)
/*
* Define the address range of the kernel non-linear virtual area
* 2PB
*/
#define H_KERN_VIRT_START ASM_CONST(0xc008000000000000)
/*
* 64k aligned address free up few of the lower bits of RPN for us

95
arch/powerpc/include/asm/book3s/64/hash.h
View File

@ -29,6 +29,10 @@
#define H_PGTABLE_EADDR_SIZE (H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + \
H_PUD_INDEX_SIZE + H_PGD_INDEX_SIZE + PAGE_SHIFT)
#define H_PGTABLE_RANGE (ASM_CONST(1) << H_PGTABLE_EADDR_SIZE)
/*
* Top 2 bits are ignored in page table walk.
*/
#define EA_MASK (~(0xcUL << 60))
/*
* We store the slot details in the second half of page table.
@ -42,59 +46,63 @@
#endif
/*
* Define the address range of the kernel non-linear virtual area. In contrast
* to the linear mapping, this is managed using the kernel page tables and then
* inserted into the hash page table to actually take effect, similarly to user
* mappings.
* +------------------------------+
* | |
* | |
* | |
* +------------------------------+ Kernel virtual map end (0xc00e000000000000)
* | |
* | |
* | 512TB/16TB of vmemmap |
* | |
* | |
* +------------------------------+ Kernel vmemmap start
* | |
* | 512TB/16TB of IO map |
* | |
* +------------------------------+ Kernel IO map start
* | |
* | 512TB/16TB of vmap |
* | |
* +------------------------------+ Kernel virt start (0xc008000000000000)
* | |
* | |
* | |
* +------------------------------+ Kernel linear (0xc.....)
*/
#define H_KERN_VIRT_START ASM_CONST(0xD000000000000000)
/*
* Allow virtual mapping of one context size.
* 512TB for 64K page size
* 64TB for 4K page size
*/
#define H_KERN_VIRT_SIZE (1UL << MAX_EA_BITS_PER_CONTEXT)
#define H_VMALLOC_START H_KERN_VIRT_START
#define H_VMALLOC_SIZE H_KERN_MAP_SIZE
#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE)
/*
* 8TB IO mapping size
*/
#define H_KERN_IO_SIZE ASM_CONST(0x80000000000) /* 8T */
#define H_KERN_IO_START H_VMALLOC_END
#define H_KERN_IO_SIZE H_KERN_MAP_SIZE
#define H_KERN_IO_END (H_KERN_IO_START + H_KERN_IO_SIZE)
/*
* The vmalloc space starts at the beginning of the kernel non-linear virtual
* region, and occupies 504T (64K) or 56T (4K)
*/
#define H_VMALLOC_START H_KERN_VIRT_START
#define H_VMALLOC_SIZE (H_KERN_VIRT_SIZE - H_KERN_IO_SIZE)
#define H_VMALLOC_END (H_VMALLOC_START + H_VMALLOC_SIZE)
#define H_VMEMMAP_START H_KERN_IO_END
#define H_VMEMMAP_SIZE H_KERN_MAP_SIZE
#define H_VMEMMAP_END (H_VMEMMAP_START + H_VMEMMAP_SIZE)
#define H_KERN_IO_START H_VMALLOC_END
#define NON_LINEAR_REGION_ID(ea) ((((unsigned long)ea - H_KERN_VIRT_START) >> REGION_SHIFT) + 2)
/*
* Region IDs
*/
#define REGION_SHIFT 60UL
#define REGION_MASK (0xfUL << REGION_SHIFT)
#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
#define VMALLOC_REGION_ID (REGION_ID(H_VMALLOC_START))
#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
#define VMEMMAP_REGION_ID (0xfUL) /* Server only */
#define USER_REGION_ID (0UL)
#define USER_REGION_ID 0
#define LINEAR_MAP_REGION_ID 1
#define VMALLOC_REGION_ID NON_LINEAR_REGION_ID(H_VMALLOC_START)
#define IO_REGION_ID NON_LINEAR_REGION_ID(H_KERN_IO_START)
#define VMEMMAP_REGION_ID NON_LINEAR_REGION_ID(H_VMEMMAP_START)
/*
* Defines the address of the vmemap area, in its own region on
* hash table CPUs.
*/
#define H_VMEMMAP_BASE (VMEMMAP_REGION_ID << REGION_SHIFT)
#ifdef CONFIG_PPC_MM_SLICES
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#endif /* CONFIG_PPC_MM_SLICES */
/* PTEIDX nibble */
#define _PTEIDX_SECONDARY 0x8
#define _PTEIDX_GROUP_IX 0x7
@ -103,6 +111,25 @@
#define H_PUD_BAD_BITS (PMD_TABLE_SIZE-1)
#ifndef __ASSEMBLY__
static inline int get_region_id(unsigned long ea)
{
int region_id;
int id = (ea >> 60UL);
if (id == 0)
return USER_REGION_ID;
if (ea < H_KERN_VIRT_START)
return LINEAR_MAP_REGION_ID;
VM_BUG_ON(id != 0xc);
BUILD_BUG_ON(NON_LINEAR_REGION_ID(H_VMALLOC_START) != 2);
region_id = NON_LINEAR_REGION_ID(ea);
VM_BUG_ON(region_id > VMEMMAP_REGION_ID);
return region_id;
}
#define hash__pmd_bad(pmd) (pmd_val(pmd) & H_PMD_BAD_BITS)
#define hash__pud_bad(pud) (pud_val(pud) & H_PUD_BAD_BITS)
static inline int hash__pgd_bad(pgd_t pgd)

72
arch/powerpc/include/asm/book3s/64/hugetlb.h
View File

@ -62,4 +62,76 @@ extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t old_pte, pte_t new_pte);
/*
* This should work for other subarchs too. But right now we use the
* new format only for 64bit book3s
*/
static inline pte_t *hugepd_page(hugepd_t hpd)
{
BUG_ON(!hugepd_ok(hpd));
/*
* We have only four bits to encode, MMU page size
*/
BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf);
return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK);
}
static inline unsigned int hugepd_mmu_psize(hugepd_t hpd)
{
return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2;
}
static inline unsigned int hugepd_shift(hugepd_t hpd)
{
return mmu_psize_to_shift(hugepd_mmu_psize(hpd));
}
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
if (radix_enabled())
return radix__flush_hugetlb_page(vma, vmaddr);
}
static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
unsigned int pdshift)
{
unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd);
return hugepd_page(hpd) + idx;
}
static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
{
*hpdp = __hugepd(__pa(new) | HUGEPD_VAL_BITS | (shift_to_mmu_psize(pshift) << 2));
}
void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
static inline int check_and_get_huge_psize(int shift)
{
int mmu_psize;
if (shift > SLICE_HIGH_SHIFT)
return -EINVAL;
mmu_psize = shift_to_mmu_psize(shift);
/*
* We need to make sure that for different page sizes reported by
* firmware we only add hugetlb support for page sizes that can be
* supported by linux page table layout.
* For now we have
* Radix: 2M and 1G
* Hash: 16M and 16G
*/
if (radix_enabled()) {
if (mmu_psize != MMU_PAGE_2M && mmu_psize != MMU_PAGE_1G)
return -EINVAL;
} else {
if (mmu_psize != MMU_PAGE_16M && mmu_psize != MMU_PAGE_16G)
return -EINVAL;
}
return mmu_psize;
}
#endif

108
arch/powerpc/include/asm/book3s/64/kup-radix.h Normal file
View File

@ -0,0 +1,108 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H
#define _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H
#include <linux/const.h>
#define AMR_KUAP_BLOCK_READ UL(0x4000000000000000)
#define AMR_KUAP_BLOCK_WRITE UL(0x8000000000000000)
#define AMR_KUAP_BLOCKED (AMR_KUAP_BLOCK_READ | AMR_KUAP_BLOCK_WRITE)
#define AMR_KUAP_SHIFT 62
#ifdef __ASSEMBLY__
.macro kuap_restore_amr gpr
#ifdef CONFIG_PPC_KUAP
BEGIN_MMU_FTR_SECTION_NESTED(67)
ld \gpr, STACK_REGS_KUAP(r1)
mtspr SPRN_AMR, \gpr
END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_RADIX_KUAP, 67)
#endif
.endm
.macro kuap_check_amr gpr1, gpr2
#ifdef CONFIG_PPC_KUAP_DEBUG
BEGIN_MMU_FTR_SECTION_NESTED(67)
mfspr \gpr1, SPRN_AMR
li \gpr2, (AMR_KUAP_BLOCKED >> AMR_KUAP_SHIFT)
sldi \gpr2, \gpr2, AMR_KUAP_SHIFT
999: tdne \gpr1, \gpr2
EMIT_BUG_ENTRY 999b, __FILE__, __LINE__, (BUGFLAG_WARNING | BUGFLAG_ONCE)
END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_RADIX_KUAP, 67)
#endif
.endm
.macro kuap_save_amr_and_lock gpr1, gpr2, use_cr, msr_pr_cr
#ifdef CONFIG_PPC_KUAP
BEGIN_MMU_FTR_SECTION_NESTED(67)
.ifnb \msr_pr_cr
bne \msr_pr_cr, 99f
.endif
mfspr \gpr1, SPRN_AMR
std \gpr1, STACK_REGS_KUAP(r1)
li \gpr2, (AMR_KUAP_BLOCKED >> AMR_KUAP_SHIFT)
sldi \gpr2, \gpr2, AMR_KUAP_SHIFT
cmpd \use_cr, \gpr1, \gpr2
beq \use_cr, 99f
// We don't isync here because we very recently entered via rfid
mtspr SPRN_AMR, \gpr2
isync
99:
END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_RADIX_KUAP, 67)
#endif
.endm
#else /* !__ASSEMBLY__ */
#ifdef CONFIG_PPC_KUAP
#include <asm/reg.h>
/*
* We support individually allowing read or write, but we don't support nesting
* because that would require an expensive read/modify write of the AMR.
*/
static inline void set_kuap(unsigned long value)
{
if (!early_mmu_has_feature(MMU_FTR_RADIX_KUAP))
return;
/*
* ISA v3.0B says we need a CSI (Context Synchronising Instruction) both
* before and after the move to AMR. See table 6 on page 1134.
*/
isync();
mtspr(SPRN_AMR, value);
isync();
}
static inline void allow_user_access(void __user *to, const void __user *from,
unsigned long size)
{
// This is written so we can resolve to a single case at build time
if (__builtin_constant_p(to) && to == NULL)
set_kuap(AMR_KUAP_BLOCK_WRITE);
else if (__builtin_constant_p(from) && from == NULL)
set_kuap(AMR_KUAP_BLOCK_READ);
else
set_kuap(0);
}
static inline void prevent_user_access(void __user *to, const void __user *from,
unsigned long size)
{
set_kuap(AMR_KUAP_BLOCKED);
}
static inline bool bad_kuap_fault(struct pt_regs *regs, bool is_write)
{
return WARN(mmu_has_feature(MMU_FTR_RADIX_KUAP) &&
(regs->kuap & (is_write ? AMR_KUAP_BLOCK_WRITE : AMR_KUAP_BLOCK_READ)),
"Bug: %s fault blocked by AMR!", is_write ? "Write" : "Read");
}
#endif /* CONFIG_PPC_KUAP */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H */

70
arch/powerpc/include/asm/book3s/64/mmu-hash.h
View File

@ -588,7 +588,8 @@ extern void slb_set_size(u16 size);
#endif
#define MAX_VMALLOC_CTX_CNT 1
#define MAX_MEMMAP_CTX_CNT 1
#define MAX_IO_CTX_CNT 1
#define MAX_VMEMMAP_CTX_CNT 1
/*
* 256MB segment
@ -601,13 +602,10 @@ extern void slb_set_size(u16 size);
* would give a protovsid of 0x1fffffffff. That will result in a VSID 0
* because of the modulo operation in vsid scramble.
*
* We add one extra context to MIN_USER_CONTEXT so that we can map kernel
* context easily. The +1 is to map the unused 0xe region mapping.
*/
#define MAX_USER_CONTEXT ((ASM_CONST(1) << CONTEXT_BITS) - 2)
#define MIN_USER_CONTEXT (MAX_KERNEL_CTX_CNT + MAX_VMALLOC_CTX_CNT + \
MAX_MEMMAP_CTX_CNT + 2)
MAX_IO_CTX_CNT + MAX_VMEMMAP_CTX_CNT)
/*
* For platforms that support on 65bit VA we limit the context bits
*/
@ -657,8 +655,8 @@ extern void slb_set_size(u16 size);
/* 4 bits per slice and we have one slice per 1TB */
#define SLICE_ARRAY_SIZE (H_PGTABLE_RANGE >> 41)
#define TASK_SLICE_ARRAY_SZ(x) ((x)->context.slb_addr_limit >> 41)
#define LOW_SLICE_ARRAY_SZ (BITS_PER_LONG / BITS_PER_BYTE)
#define TASK_SLICE_ARRAY_SZ(x) ((x)->hash_context->slb_addr_limit >> 41)
#ifndef __ASSEMBLY__
#ifdef CONFIG_PPC_SUBPAGE_PROT
@ -687,12 +685,41 @@ struct subpage_prot_table {
#define SBP_L3_SHIFT (SBP_L2_SHIFT + SBP_L2_BITS)
extern void subpage_prot_free(struct mm_struct *mm);
extern void subpage_prot_init_new_context(struct mm_struct *mm);
#else
static inline void subpage_prot_free(struct mm_struct *mm) {}
static inline void subpage_prot_init_new_context(struct mm_struct *mm) { }
#endif /* CONFIG_PPC_SUBPAGE_PROT */
/*
* One bit per slice. We have lower slices which cover 256MB segments
* upto 4G range. That gets us 16 low slices. For the rest we track slices
* in 1TB size.
*/
struct slice_mask {
u64 low_slices;
DECLARE_BITMAP(high_slices, SLICE_NUM_HIGH);
};
struct hash_mm_context {
u16 user_psize; /* page size index */
/* SLB page size encodings*/
unsigned char low_slices_psize[LOW_SLICE_ARRAY_SZ];
unsigned char high_slices_psize[SLICE_ARRAY_SIZE];
unsigned long slb_addr_limit;
#ifdef CONFIG_PPC_64K_PAGES
struct slice_mask mask_64k;
#endif
struct slice_mask mask_4k;
#ifdef CONFIG_HUGETLB_PAGE
struct slice_mask mask_16m;
struct slice_mask mask_16g;
#endif
#ifdef CONFIG_PPC_SUBPAGE_PROT
struct subpage_prot_table *spt;
#endif /* CONFIG_PPC_SUBPAGE_PROT */
};
#if 0
/*
* The code below is equivalent to this function for arguments
@ -747,7 +774,7 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea,
/*
* Bad address. We return VSID 0 for that
*/
if ((ea & ~REGION_MASK) >= H_PGTABLE_RANGE)
if ((ea & EA_MASK) >= H_PGTABLE_RANGE)
return 0;
if (!mmu_has_feature(MMU_FTR_68_BIT_VA))
@ -774,28 +801,29 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea,
* 0x00002 - [ 0xc002000000000000 - 0xc003ffffffffffff]
* 0x00003 - [ 0xc004000000000000 - 0xc005ffffffffffff]
* 0x00004 - [ 0xc006000000000000 - 0xc007ffffffffffff]
* 0x00005 - [ 0xd000000000000000 - 0xd001ffffffffffff ]
* 0x00006 - Not used - Can map 0xe000000000000000 range.
* 0x00007 - [ 0xf000000000000000 - 0xf001ffffffffffff ]
*
* So we can compute the context from the region (top nibble) by
* subtracting 11, or 0xc - 1.
* vmap, IO, vmemap
*
* 0x00005 - [ 0xc008000000000000 - 0xc009ffffffffffff]
* 0x00006 - [ 0xc00a000000000000 - 0xc00bffffffffffff]
* 0x00007 - [ 0xc00c000000000000 - 0xc00dffffffffffff]
*
*/
static inline unsigned long get_kernel_context(unsigned long ea)
{
unsigned long region_id = REGION_ID(ea);
unsigned long region_id = get_region_id(ea);
unsigned long ctx;
/*
* For linear mapping we do support multiple context
* Depending on Kernel config, kernel region can have one context
* or more.
*/
if (region_id == KERNEL_REGION_ID) {
if (region_id == LINEAR_MAP_REGION_ID) {
/*
* We already verified ea to be not beyond the addr limit.
*/
ctx = 1 + ((ea & ~REGION_MASK) >> MAX_EA_BITS_PER_CONTEXT);
ctx = 1 + ((ea & EA_MASK) >> MAX_EA_BITS_PER_CONTEXT);
} else
ctx = (region_id - 0xc) + MAX_KERNEL_CTX_CNT;
ctx = region_id + MAX_KERNEL_CTX_CNT - 1;
return ctx;
}

104
arch/powerpc/include/asm/book3s/64/mmu.h
View File

@ -25,15 +25,22 @@ struct mmu_psize_def {
};
};
extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
#endif /* __ASSEMBLY__ */
/*
* For BOOK3s 64 with 4k and 64K linux page size
* we want to use pointers, because the page table
* actually store pfn
* If we store section details in page->flags we can't increase the MAX_PHYSMEM_BITS
* if we increase SECTIONS_WIDTH we will not store node details in page->flags and
* page_to_nid does a page->section->node lookup
* Hence only increase for VMEMMAP. Further depending on SPARSEMEM_EXTREME reduce
* memory requirements with large number of sections.
* 51 bits is the max physical real address on POWER9
*/
typedef pte_t *pgtable_t;
#endif /* __ASSEMBLY__ */
#if defined(CONFIG_SPARSEMEM_VMEMMAP) && defined(CONFIG_SPARSEMEM_EXTREME) && \
defined(CONFIG_PPC_64K_PAGES)
#define MAX_PHYSMEM_BITS 51
#else
#define MAX_PHYSMEM_BITS 46
#endif
/* 64-bit classic hash table MMU */
#include <asm/book3s/64/mmu-hash.h>
@ -89,16 +96,6 @@ struct spinlock;
/* Maximum possible number of NPUs in a system. */
#define NV_MAX_NPUS 8
/*
* One bit per slice. We have lower slices which cover 256MB segments
* upto 4G range. That gets us 16 low slices. For the rest we track slices
* in 1TB size.
*/
struct slice_mask {
u64 low_slices;
DECLARE_BITMAP(high_slices, SLICE_NUM_HIGH);
};
typedef struct {
union {
/*
@ -112,7 +109,6 @@ typedef struct {
mm_context_id_t id;
mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE];
};
u16 user_psize; /* page size index */
/* Number of bits in the mm_cpumask */
atomic_t active_cpus;
@ -122,27 +118,9 @@ typedef struct {
/* NPU NMMU context */
struct npu_context *npu_context;
struct hash_mm_context *hash_context;
#ifdef CONFIG_PPC_MM_SLICES
/* SLB page size encodings*/
unsigned char low_slices_psize[BITS_PER_LONG / BITS_PER_BYTE];
unsigned char high_slices_psize[SLICE_ARRAY_SIZE];
unsigned long slb_addr_limit;
# ifdef CONFIG_PPC_64K_PAGES
struct slice_mask mask_64k;
# endif
struct slice_mask mask_4k;
# ifdef CONFIG_HUGETLB_PAGE
struct slice_mask mask_16m;
struct slice_mask mask_16g;
# endif
#else
u16 sllp; /* SLB page size encoding */
#endif
unsigned long vdso_base;
#ifdef CONFIG_PPC_SUBPAGE_PROT
struct subpage_prot_table spt;
#endif /* CONFIG_PPC_SUBPAGE_PROT */
/*
* pagetable fragment support
*/
@ -163,6 +141,60 @@ typedef struct {
#endif
} mm_context_t;
static inline u16 mm_ctx_user_psize(mm_context_t *ctx)
{
return ctx->hash_context->user_psize;
}
static inline void mm_ctx_set_user_psize(mm_context_t *ctx, u16 user_psize)
{
ctx->hash_context->user_psize = user_psize;
}
static inline unsigned char *mm_ctx_low_slices(mm_context_t *ctx)
{
return ctx->hash_context->low_slices_psize;
}
static inline unsigned char *mm_ctx_high_slices(mm_context_t *ctx)
{
return ctx->hash_context->high_slices_psize;
}
static inline unsigned long mm_ctx_slb_addr_limit(mm_context_t *ctx)
{
return ctx->hash_context->slb_addr_limit;
}
static inline void mm_ctx_set_slb_addr_limit(mm_context_t *ctx, unsigned long limit)
{
ctx->hash_context->slb_addr_limit = limit;
}
static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
#ifdef CONFIG_PPC_64K_PAGES
if (psize == MMU_PAGE_64K)
return &ctx->hash_context->mask_64k;
#endif
#ifdef CONFIG_HUGETLB_PAGE
if (psize == MMU_PAGE_16M)
return &ctx->hash_context->mask_16m;
if (psize == MMU_PAGE_16G)
return &ctx->hash_context->mask_16g;
#endif
BUG_ON(psize != MMU_PAGE_4K);
return &ctx->hash_context->mask_4k;
}
#ifdef CONFIG_PPC_SUBPAGE_PROT
static inline struct subpage_prot_table *mm_ctx_subpage_prot(mm_context_t *ctx)
{
return ctx->hash_context->spt;
}
#endif
/*
* The current system page and segment sizes
*/

52
arch/powerpc/include/asm/book3s/64/pgalloc.h
View File

@ -19,29 +19,7 @@ struct vmemmap_backing {
};
extern struct vmemmap_backing *vmemmap_list;
/*
* Functions that deal with pagetables that could be at any level of
* the table need to be passed an "index_size" so they know how to
* handle allocation. For PTE pages (which are linked to a struct
* page for now, and drawn from the main get_free_pages() pool), the
* allocation size will be (2^index_size * sizeof(pointer)) and
* allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
*
* The maximum index size needs to be big enough to allow any
* pagetable sizes we need, but small enough to fit in the low bits of
* any page table pointer. In other words all pagetables, even tiny
* ones, must be aligned to allow at least enough low 0 bits to
* contain this value. This value is also used as a mask, so it must
* be one less than a power of two.
*/
#define MAX_PGTABLE_INDEX_SIZE 0xf
extern struct kmem_cache *pgtable_cache[];
#define PGT_CACHE(shift) pgtable_cache[shift]
extern pte_t *pte_fragment_alloc(struct mm_struct *, int);
extern pmd_t *pmd_fragment_alloc(struct mm_struct *, unsigned long);
extern void pte_fragment_free(unsigned long *, int);
extern void pmd_fragment_free(unsigned long *);
extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);
#ifdef CONFIG_SMP
@ -81,6 +59,9 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
pgtable_gfp_flags(mm, GFP_KERNEL));
if (unlikely(!pgd))
return pgd;
/*
* Don't scan the PGD for pointers, it contains references to PUDs but
* those references are not full pointers and so can't be recognised by
@ -185,31 +166,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
*pmd = __pmd(__pgtable_ptr_val(pte_page) | PMD_VAL_BITS);
}
static inline pgtable_t pmd_pgtable(pmd_t pmd)
{
return (pgtable_t)pmd_page_vaddr(pmd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
return (pte_t *)pte_fragment_alloc(mm, 1);
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
{
return (pgtable_t)pte_fragment_alloc(mm, 0);
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
pte_fragment_free((unsigned long *)pte, 1);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pte_fragment_free((unsigned long *)ptepage, 0);
}
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
unsigned long address)
{
@ -221,8 +177,6 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
pgtable_free_tlb(tlb, table, PTE_INDEX);
}
#define check_pgt_cache() do { } while (0)
extern atomic_long_t direct_pages_count[MMU_PAGE_COUNT];
static inline void update_page_count(int psize, long count)
{

12
arch/powerpc/include/asm/book3s/64/pgtable.h
View File

@ -277,9 +277,11 @@ extern unsigned long __vmalloc_end;
extern unsigned long __kernel_virt_start;
extern unsigned long __kernel_virt_size;
extern unsigned long __kernel_io_start;
extern unsigned long __kernel_io_end;
#define KERN_VIRT_START __kernel_virt_start
#define KERN_VIRT_SIZE __kernel_virt_size
#define KERN_IO_START __kernel_io_start
#define KERN_IO_END __kernel_io_end
extern struct page *vmemmap;
extern unsigned long ioremap_bot;
extern unsigned long pci_io_base;
@ -296,8 +298,7 @@ extern unsigned long pci_io_base;
#include <asm/barrier.h>
/*
* The second half of the kernel virtual space is used for IO mappings,
* it's itself carved into the PIO region (ISA and PHB IO space) and
* IO space itself carved into the PIO region (ISA and PHB IO space) and
* the ioremap space
*
* ISA_IO_BASE = KERN_IO_START, 64K reserved area
@ -310,7 +311,7 @@ extern unsigned long pci_io_base;
#define PHB_IO_BASE (ISA_IO_END)
#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
#define IOREMAP_BASE (PHB_IO_END)
#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
#define IOREMAP_END (KERN_IO_END)
/* Advertise special mapping type for AGP */
#define HAVE_PAGE_AGP
@ -992,7 +993,8 @@ extern struct page *pgd_page(pgd_t pgd);
(((pte_t *) pmd_page_vaddr(*(dir))) + pte_index(addr))
#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
#define pte_unmap(pte) do { } while(0)
static inline void pte_unmap(pte_t *pte) { }
/* to find an entry in a kernel page-table-directory */
/* This now only contains the vmalloc pages */

9
arch/powerpc/include/asm/book3s/64/radix-4k.h
View File

@ -5,10 +5,11 @@
/*
* For 4K page size supported index is 13/9/9/9
*/
#define RADIX_PTE_INDEX_SIZE 9 /* 2MB huge page */
#define RADIX_PMD_INDEX_SIZE 9 /* 1G huge page */
#define RADIX_PUD_INDEX_SIZE 9
#define RADIX_PGD_INDEX_SIZE 13
#define RADIX_PTE_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 4K = 2MB
#define RADIX_PMD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 2MB = 1GB
#define RADIX_PUD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 1GB = 512GB
#define RADIX_PGD_INDEX_SIZE 13 // size: 8B << 13 = 64KB, maps 2^13 x 512GB = 4PB
/*
* One fragment per per page
*/

8
arch/powerpc/include/asm/book3s/64/radix-64k.h
View File

@ -5,10 +5,10 @@
/*
* For 64K page size supported index is 13/9/9/5
*/
#define RADIX_PTE_INDEX_SIZE 5 /* 2MB huge page */
#define RADIX_PMD_INDEX_SIZE 9 /* 1G huge page */
#define RADIX_PUD_INDEX_SIZE 9
#define RADIX_PGD_INDEX_SIZE 13
#define RADIX_PTE_INDEX_SIZE 5 // size: 8B << 5 = 256B, maps 2^5 x 64K = 2MB
#define RADIX_PMD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 2MB = 1GB
#define RADIX_PUD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps 2^9 x 1GB = 512GB
#define RADIX_PGD_INDEX_SIZE 13 // size: 8B << 13 = 64KB, maps 2^13 x 512GB = 4PB
/*
* We use a 256 byte PTE page fragment in radix

40
arch/powerpc/include/asm/book3s/64/radix.h
View File

@ -72,19 +72,17 @@
* | |
* | |
* | |
* +------------------------------+ Kernel IO map end (0xc010000000000000)
* +------------------------------+ Kernel vmemmap end (0xc010000000000000)
* | |
* | 512TB |
* | |
* | 1/2 of virtual map |
* +------------------------------+ Kernel IO map end/vmemap start
* | |
* | 512TB |
* | |
* +------------------------------+ Kernel IO map start
* +------------------------------+ Kernel vmap end/ IO map start
* | |
* | 1/4 of virtual map |
* | |
* +------------------------------+ Kernel vmemap start
* | |
* | 1/4 of virtual map |
* | 512TB |
* | |
* +------------------------------+ Kernel virt start (0xc008000000000000)
* | |
@ -93,24 +91,24 @@
* +------------------------------+ Kernel linear (0xc.....)
*/
#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000)
#define RADIX_KERN_VIRT_SIZE ASM_CONST(0x0008000000000000)
#define RADIX_KERN_VIRT_START ASM_CONST(0xc008000000000000)
/*
* The vmalloc space starts at the beginning of that region, and
* occupies a quarter of it on radix config.
* (we keep a quarter for the virtual memmap)
* 49 = MAX_EA_BITS_PER_CONTEXT (hash specific). To make sure we pick
* the same value as hash.
*/
#define RADIX_KERN_MAP_SIZE (1UL << 49)
#define RADIX_VMALLOC_START RADIX_KERN_VIRT_START
#define RADIX_VMALLOC_SIZE (RADIX_KERN_VIRT_SIZE >> 2)
#define RADIX_VMALLOC_SIZE RADIX_KERN_MAP_SIZE
#define RADIX_VMALLOC_END (RADIX_VMALLOC_START + RADIX_VMALLOC_SIZE)
/*
* Defines the address of the vmemap area, in its own region on
* hash table CPUs.
*/
#define RADIX_VMEMMAP_BASE (RADIX_VMALLOC_END)
#define RADIX_KERN_IO_START (RADIX_KERN_VIRT_START + (RADIX_KERN_VIRT_SIZE >> 1))
#define RADIX_KERN_IO_START RADIX_VMALLOC_END
#define RADIX_KERN_IO_SIZE RADIX_KERN_MAP_SIZE
#define RADIX_KERN_IO_END (RADIX_KERN_IO_START + RADIX_KERN_IO_SIZE)
#define RADIX_VMEMMAP_START RADIX_KERN_IO_END
#define RADIX_VMEMMAP_SIZE RADIX_KERN_MAP_SIZE
#define RADIX_VMEMMAP_END (RADIX_VMEMMAP_START + RADIX_VMEMMAP_SIZE)
#ifndef __ASSEMBLY__
#define RADIX_PTE_TABLE_SIZE (sizeof(pte_t) << RADIX_PTE_INDEX_SIZE)

13
arch/powerpc/include/asm/book3s/64/slice.h
View File

@ -2,8 +2,6 @@
#ifndef _ASM_POWERPC_BOOK3S_64_SLICE_H
#define _ASM_POWERPC_BOOK3S_64_SLICE_H
#ifdef CONFIG_PPC_MM_SLICES
#define SLICE_LOW_SHIFT 28
#define SLICE_LOW_TOP (0x100000000ul)
#define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
@ -13,15 +11,6 @@
#define SLICE_NUM_HIGH (H_PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
#define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT)
#else /* CONFIG_PPC_MM_SLICES */
#define get_slice_psize(mm, addr) ((mm)->context.user_psize)
#define slice_set_user_psize(mm, psize) \
do { \
(mm)->context.user_psize = (psize); \
(mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
} while (0)
#endif /* CONFIG_PPC_MM_SLICES */
#define SLB_ADDR_LIMIT_DEFAULT DEFAULT_MAP_WINDOW_USER64
#endif /* _ASM_POWERPC_BOOK3S_64_SLICE_H */

19
arch/powerpc/include/asm/cpuidle.h
View File

@ -27,10 +27,11 @@
* the THREAD_WINKLE_BITS are set, which indicate which threads have not
* yet woken from the winkle state.
*/
#define PNV_CORE_IDLE_LOCK_BIT 0x10000000
#define NR_PNV_CORE_IDLE_LOCK_BIT 28
#define PNV_CORE_IDLE_LOCK_BIT (1ULL << NR_PNV_CORE_IDLE_LOCK_BIT)
#define PNV_CORE_IDLE_WINKLE_COUNT_SHIFT 16
#define PNV_CORE_IDLE_WINKLE_COUNT 0x00010000
#define PNV_CORE_IDLE_WINKLE_COUNT_ALL_BIT 0x00080000
#define PNV_CORE_IDLE_WINKLE_COUNT_BITS 0x000F0000
#define PNV_CORE_IDLE_THREAD_WINKLE_BITS_SHIFT 8
#define PNV_CORE_IDLE_THREAD_WINKLE_BITS 0x0000FF00
@ -68,16 +69,6 @@
#define ERR_DEEP_STATE_ESL_MISMATCH -2
#ifndef __ASSEMBLY__
/* Additional SPRs that need to be saved/restored during stop */
struct stop_sprs {
u64 pid;
u64 ldbar;
u64 fscr;
u64 hfscr;
u64 mmcr1;
u64 mmcr2;
u64 mmcra;
};
#define PNV_IDLE_NAME_LEN 16
struct pnv_idle_states_t {
@ -92,10 +83,6 @@ struct pnv_idle_states_t {
extern struct pnv_idle_states_t *pnv_idle_states;
extern int nr_pnv_idle_states;
extern u32 pnv_fastsleep_workaround_at_entry[];
extern u32 pnv_fastsleep_workaround_at_exit[];
extern u64 pnv_first_deep_stop_state;
unsigned long pnv_cpu_offline(unsigned int cpu);
int validate_psscr_val_mask(u64 *psscr_val, u64 *psscr_mask, u32 flags);

21
arch/powerpc/include/asm/drmem.h
View File

@ -17,6 +17,9 @@ struct drmem_lmb {
u32 drc_index;
u32 aa_index;
u32 flags;
#ifdef CONFIG_MEMORY_HOTPLUG
int nid;
#endif
};
struct drmem_lmb_info {
@ -104,4 +107,22 @@ static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb)
lmb->aa_index = 0xffffffff;
}
#ifdef CONFIG_MEMORY_HOTPLUG
static inline void lmb_set_nid(struct drmem_lmb *lmb)
{
lmb->nid = memory_add_physaddr_to_nid(lmb->base_addr);
}
static inline void lmb_clear_nid(struct drmem_lmb *lmb)
{
lmb->nid = -1;
}
#else
static inline void lmb_set_nid(struct drmem_lmb *lmb)
{
}
static inline void lmb_clear_nid(struct drmem_lmb *lmb)
{
}
#endif
#endif /* _ASM_POWERPC_LMB_H */

2
arch/powerpc/include/asm/exception-64s.h
View File

@ -497,6 +497,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
RESTORE_CTR(r1, area); \
b bad_stack; \
3: EXCEPTION_PROLOG_COMMON_1(); \
kuap_save_amr_and_lock r9, r10, cr1, cr0; \
beq 4f; /* if from kernel mode */ \
ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \
SAVE_PPR(area, r9); \
@ -691,6 +692,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
*/
#define EXCEPTION_COMMON_NORET_STACK(area, trap, label, hdlr, additions) \
EXCEPTION_PROLOG_COMMON_1(); \
kuap_save_amr_and_lock r9, r10, cr1; \
EXCEPTION_PROLOG_COMMON_2(area); \
EXCEPTION_PROLOG_COMMON_3(trap); \
/* Volatile regs are potentially clobbered here */ \

1
arch/powerpc/include/asm/fadump.h
View File

@ -219,5 +219,6 @@ extern void fadump_cleanup(void);
static inline int is_fadump_active(void) { return 0; }
static inline int should_fadump_crash(void) { return 0; }
static inline void crash_fadump(struct pt_regs *regs, const char *str) { }
static inline void fadump_cleanup(void) { }
#endif
#endif

3
arch/powerpc/include/asm/feature-fixups.h
View File

@ -100,6 +100,9 @@ label##5: \
#define END_MMU_FTR_SECTION(msk, val) \
END_MMU_FTR_SECTION_NESTED(msk, val, 97)
#define END_MMU_FTR_SECTION_NESTED_IFSET(msk, label) \
END_MMU_FTR_SECTION_NESTED((msk), (msk), label)
#define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk))
#define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0)

5
arch/powerpc/include/asm/fixmap.h
View File

@ -22,7 +22,12 @@
#include <asm/kmap_types.h>
#endif
#ifdef CONFIG_KASAN
#include <asm/kasan.h>
#define FIXADDR_TOP (KASAN_SHADOW_START - PAGE_SIZE)
#else
#define FIXADDR_TOP ((unsigned long)(-PAGE_SIZE))
#endif
/*
* Here we define all the compile-time 'special' virtual

4
arch/powerpc/include/asm/futex.h
View File

@ -35,6 +35,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
{
int oldval = 0, ret;
allow_write_to_user(uaddr, sizeof(*uaddr));
pagefault_disable();
switch (op) {
@ -62,6 +63,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
if (!ret)
*oval = oldval;
prevent_write_to_user(uaddr, sizeof(*uaddr));
return ret;
}
@ -75,6 +77,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
if (!access_ok(uaddr, sizeof(u32)))
return -EFAULT;
allow_write_to_user(uaddr, sizeof(*uaddr));
__asm__ __volatile__ (
PPC_ATOMIC_ENTRY_BARRIER
"1: lwarx %1,0,%3 # futex_atomic_cmpxchg_inatomic\n\
@ -95,6 +98,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
: "cc", "memory");
*uval = prev;
prevent_write_to_user(uaddr, sizeof(*uaddr));
return ret;
}

87
arch/powerpc/include/asm/hugetlb.h
View File

@ -6,82 +6,16 @@
#include <asm/page.h>
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/hugetlb.h>
/*
* This should work for other subarchs too. But right now we use the
* new format only for 64bit book3s
*/
static inline pte_t *hugepd_page(hugepd_t hpd)
{
BUG_ON(!hugepd_ok(hpd));
/*
* We have only four bits to encode, MMU page size
*/
BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf);
return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK);
}
static inline unsigned int hugepd_mmu_psize(hugepd_t hpd)
{
return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2;
}
static inline unsigned int hugepd_shift(hugepd_t hpd)
{
return mmu_psize_to_shift(hugepd_mmu_psize(hpd));
}
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
if (radix_enabled())
return radix__flush_hugetlb_page(vma, vmaddr);
}
#else
static inline pte_t *hugepd_page(hugepd_t hpd)
{
BUG_ON(!hugepd_ok(hpd));
#ifdef CONFIG_PPC_8xx
return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
#else
return (pte_t *)((hpd_val(hpd) &
~HUGEPD_SHIFT_MASK) | PD_HUGE);
#endif
}
static inline unsigned int hugepd_shift(hugepd_t hpd)
{
#ifdef CONFIG_PPC_8xx
return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17;
#else
return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
#endif
}
#elif defined(CONFIG_PPC_FSL_BOOK3E)
#include <asm/nohash/hugetlb-book3e.h>
#elif defined(CONFIG_PPC_8xx)
#include <asm/nohash/32/hugetlb-8xx.h>
#endif /* CONFIG_PPC_BOOK3S_64 */
extern bool hugetlb_disabled;
static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
unsigned pdshift)
{
/*
* On FSL BookE, we have multiple higher-level table entries that
* point to the same hugepte. Just use the first one since they're all
* identical. So for that case, idx=0.
*/
unsigned long idx = 0;
pte_t *dir = hugepd_page(hpd);
#ifdef CONFIG_PPC_8xx
idx = (addr & ((1UL << pdshift) - 1)) >> PAGE_SHIFT;
#elif !defined(CONFIG_PPC_FSL_BOOK3E)
idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd);
#endif
return dir + idx;
}
void hugetlbpage_init_default(void);
void flush_dcache_icache_hugepage(struct page *page);
@ -99,15 +33,6 @@ static inline int is_hugepage_only_range(struct mm_struct *mm,
void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
pte_t pte);
#ifdef CONFIG_PPC_8xx
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
flush_tlb_page(vma, vmaddr);
}
#else
void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
#endif
#define __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,

8
arch/powerpc/include/asm/hw_breakpoint.h
View File

@ -90,10 +90,18 @@ static inline void hw_breakpoint_disable(void)
extern void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs);
int hw_breakpoint_handler(struct die_args *args);
extern int set_dawr(struct arch_hw_breakpoint *brk);
extern bool dawr_force_enable;
static inline bool dawr_enabled(void)
{
return dawr_force_enable;
}
#else /* CONFIG_HAVE_HW_BREAKPOINT */
static inline void hw_breakpoint_disable(void) { }
static inline void thread_change_pc(struct task_struct *tsk,
struct pt_regs *regs) { }
static inline bool dawr_enabled(void) { return false; }
#endif /* CONFIG_HAVE_HW_BREAKPOINT */
#endif /* __KERNEL__ */
#endif /* _PPC_BOOK3S_64_HW_BREAKPOINT_H */

39
arch/powerpc/include/asm/imc-pmu.h
View File

@ -33,6 +33,7 @@
*/
#define THREAD_IMC_LDBAR_MASK 0x0003ffffffffe000ULL
#define THREAD_IMC_ENABLE 0x8000000000000000ULL
#define TRACE_IMC_ENABLE 0x4000000000000000ULL
/*
* For debugfs interface for imc-mode and imc-command
@ -59,6 +60,34 @@ struct imc_events {
char *scale;
};
/*
* Trace IMC hardware updates a 64bytes record on
* Core Performance Monitoring Counter (CPMC)
* overflow. Here is the layout for the trace imc record
*
* DW 0 : Timebase
* DW 1 : Program Counter
* DW 2 : PIDR information
* DW 3 : CPMC1
* DW 4 : CPMC2
* DW 5 : CPMC3
* Dw 6 : CPMC4
* DW 7 : Timebase
* .....
*
* The following is the data structure to hold trace imc data.
*/
struct trace_imc_data {
u64 tb1;
u64 ip;
u64 val;
u64 cpmc1;
u64 cpmc2;
u64 cpmc3;
u64 cpmc4;
u64 tb2;
};
/* Event attribute array index */
#define IMC_FORMAT_ATTR 0
#define IMC_EVENT_ATTR 1
@ -68,6 +97,13 @@ struct imc_events {
/* PMU Format attribute macros */
#define IMC_EVENT_OFFSET_MASK 0xffffffffULL
/*
* Macro to mask bits 0:21 of first double word(which is the timebase) to
* compare with 8th double word (timebase) of trace imc record data.
*/
#define IMC_TRACE_RECORD_TB1_MASK 0x3ffffffffffULL
/*
* Device tree parser code detects IMC pmu support and
* registers new IMC pmus. This structure will hold the
@ -113,6 +149,7 @@ struct imc_pmu_ref {
enum {
IMC_TYPE_THREAD = 0x1,
IMC_TYPE_TRACE = 0x2,
IMC_TYPE_CORE = 0x4,
IMC_TYPE_CHIP = 0x10,
};
@ -123,6 +160,8 @@ enum {
#define IMC_DOMAIN_NEST 1
#define IMC_DOMAIN_CORE 2
#define IMC_DOMAIN_THREAD 3
/* For trace-imc the domain is still thread but it operates in trace-mode */
#define IMC_DOMAIN_TRACE 4
extern int init_imc_pmu(struct device_node *parent,
struct imc_pmu *pmu_ptr, int pmu_id);

40
arch/powerpc/include/asm/kasan.h Normal file
View File

@ -0,0 +1,40 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_KASAN_H
#define __ASM_KASAN_H
#ifdef CONFIG_KASAN
#define _GLOBAL_KASAN(fn) _GLOBAL(__##fn)
#define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(__##fn)
#define EXPORT_SYMBOL_KASAN(fn) EXPORT_SYMBOL(__##fn)
#else
#define _GLOBAL_KASAN(fn) _GLOBAL(fn)
#define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(fn)
#define EXPORT_SYMBOL_KASAN(fn)
#endif
#ifndef __ASSEMBLY__
#include <asm/page.h>
#define KASAN_SHADOW_SCALE_SHIFT 3
#define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \
(PAGE_OFFSET >> KASAN_SHADOW_SCALE_SHIFT))
#define KASAN_SHADOW_OFFSET ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET)
#define KASAN_SHADOW_END 0UL
#define KASAN_SHADOW_SIZE (KASAN_SHADOW_END - KASAN_SHADOW_START)
#ifdef CONFIG_KASAN
void kasan_early_init(void);
void kasan_mmu_init(void);
void kasan_init(void);
#else
static inline void kasan_init(void) { }
static inline void kasan_mmu_init(void) { }
#endif
#endif /* __ASSEMBLY */
#endif

73
arch/powerpc/include/asm/kup.h Normal file
View File

@ -0,0 +1,73 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_KUP_H_
#define _ASM_POWERPC_KUP_H_
#ifdef CONFIG_PPC64
#include <asm/book3s/64/kup-radix.h>
#endif
#ifdef CONFIG_PPC_8xx
#include <asm/nohash/32/kup-8xx.h>
#endif
#ifdef CONFIG_PPC_BOOK3S_32
#include <asm/book3s/32/kup.h>
#endif
#ifdef __ASSEMBLY__
#ifndef CONFIG_PPC_KUAP
.macro kuap_save_and_lock sp, thread, gpr1, gpr2, gpr3
.endm
.macro kuap_restore sp, current, gpr1, gpr2, gpr3
.endm
.macro kuap_check current, gpr
.endm
#endif
#else /* !__ASSEMBLY__ */
#include <asm/pgtable.h>
void setup_kup(void);
#ifdef CONFIG_PPC_KUEP
void setup_kuep(bool disabled);
#else
static inline void setup_kuep(bool disabled) { }
#endif /* CONFIG_PPC_KUEP */
#ifdef CONFIG_PPC_KUAP
void setup_kuap(bool disabled);
#else
static inline void setup_kuap(bool disabled) { }
static inline void allow_user_access(void __user *to, const void __user *from,
unsigned long size) { }
static inline void prevent_user_access(void __user *to, const void __user *from,
unsigned long size) { }
static inline bool bad_kuap_fault(struct pt_regs *regs, bool is_write) { return false; }
#endif /* CONFIG_PPC_KUAP */
static inline void allow_read_from_user(const void __user *from, unsigned long size)
{
allow_user_access(NULL, from, size);
}
static inline void allow_write_to_user(void __user *to, unsigned long size)
{
allow_user_access(to, NULL, size);
}
static inline void prevent_read_from_user(const void __user *from, unsigned long size)
{
prevent_user_access(NULL, from, size);
}
static inline void prevent_write_to_user(void __user *to, unsigned long size)
{
prevent_user_access(to, NULL, size);
}
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_POWERPC_KUP_H_ */

97
arch/powerpc/include/asm/mce.h
View File

@ -31,7 +31,7 @@ enum MCE_Version {
enum MCE_Severity {
MCE_SEV_NO_ERROR = 0,
MCE_SEV_WARNING = 1,
MCE_SEV_ERROR_SYNC = 2,
MCE_SEV_SEVERE = 2,
MCE_SEV_FATAL = 3,
};
@ -56,6 +56,14 @@ enum MCE_ErrorType {
MCE_ERROR_TYPE_LINK = 7,
};
enum MCE_ErrorClass {
MCE_ECLASS_UNKNOWN = 0,
MCE_ECLASS_HARDWARE,
MCE_ECLASS_HARD_INDETERMINATE,
MCE_ECLASS_SOFTWARE,
MCE_ECLASS_SOFT_INDETERMINATE,
};
enum MCE_UeErrorType {
MCE_UE_ERROR_INDETERMINATE = 0,
MCE_UE_ERROR_IFETCH = 1,
@ -110,73 +118,75 @@ enum MCE_LinkErrorType {
};
struct machine_check_event {
enum MCE_Version version:8; /* 0x00 */
uint8_t in_use; /* 0x01 */
enum MCE_Severity severity:8; /* 0x02 */
enum MCE_Initiator initiator:8; /* 0x03 */
enum MCE_ErrorType error_type:8; /* 0x04 */
enum MCE_Disposition disposition:8; /* 0x05 */
uint8_t reserved_1[2]; /* 0x06 */
uint64_t gpr3; /* 0x08 */
uint64_t srr0; /* 0x10 */
uint64_t srr1; /* 0x18 */
union { /* 0x20 */
enum MCE_Version version:8;
u8 in_use;
enum MCE_Severity severity:8;
enum MCE_Initiator initiator:8;
enum MCE_ErrorType error_type:8;
enum MCE_ErrorClass error_class:8;
enum MCE_Disposition disposition:8;
bool sync_error;
u16 cpu;
u64 gpr3;
u64 srr0;
u64 srr1;
union {
struct {
enum MCE_UeErrorType ue_error_type:8;
uint8_t effective_address_provided;
uint8_t physical_address_provided;
uint8_t reserved_1[5];
uint64_t effective_address;
uint64_t physical_address;
uint8_t reserved_2[8];
u8 effective_address_provided;
u8 physical_address_provided;
u8 reserved_1[5];
u64 effective_address;
u64 physical_address;
u8 reserved_2[8];
} ue_error;
struct {
enum MCE_SlbErrorType slb_error_type:8;
uint8_t effective_address_provided;
uint8_t reserved_1[6];
uint64_t effective_address;
uint8_t reserved_2[16];
u8 effective_address_provided;
u8 reserved_1[6];
u64 effective_address;
u8 reserved_2[16];
} slb_error;
struct {
enum MCE_EratErrorType erat_error_type:8;
uint8_t effective_address_provided;
uint8_t reserved_1[6];
uint64_t effective_address;
uint8_t reserved_2[16];
u8 effective_address_provided;
u8 reserved_1[6];
u64 effective_address;
u8 reserved_2[16];
} erat_error;
struct {
enum MCE_TlbErrorType tlb_error_type:8;
uint8_t effective_address_provided;
uint8_t reserved_1[6];
uint64_t effective_address;
uint8_t reserved_2[16];
u8 effective_address_provided;
u8 reserved_1[6];
u64 effective_address;
u8 reserved_2[16];
} tlb_error;
struct {
enum MCE_UserErrorType user_error_type:8;
uint8_t effective_address_provided;
uint8_t reserved_1[6];
uint64_t effective_address;
uint8_t reserved_2[16];
u8 effective_address_provided;
u8 reserved_1[6];
u64 effective_address;
u8 reserved_2[16];
} user_error;
struct {
enum MCE_RaErrorType ra_error_type:8;
uint8_t effective_address_provided;
uint8_t reserved_1[6];
uint64_t effective_address;
uint8_t reserved_2[16];
u8 effective_address_provided;
u8 reserved_1[6];
u64 effective_address;
u8 reserved_2[16];
} ra_error;
struct {
enum MCE_LinkErrorType link_error_type:8;
uint8_t effective_address_provided;
uint8_t reserved_1[6];
uint64_t effective_address;
uint8_t reserved_2[16];
u8 effective_address_provided;
u8 reserved_1[6];
u64 effective_address;
u8 reserved_2[16];
} link_error;
} u;
};
@ -194,6 +204,8 @@ struct mce_error_info {
} u;
enum MCE_Severity severity:8;
enum MCE_Initiator initiator:8;
enum MCE_ErrorClass error_class:8;
bool sync_error;
};
#define MAX_MC_EVT 100
@ -210,6 +222,7 @@ extern void release_mce_event(void);
extern void machine_check_queue_event(void);
extern void machine_check_print_event_info(struct machine_check_event *evt,
bool user_mode, bool in_guest);
unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr);
#ifdef CONFIG_PPC_BOOK3S_64
void flush_and_reload_slb(void);
#endif /* CONFIG_PPC_BOOK3S_64 */

28
arch/powerpc/include/asm/mmu.h
View File

@ -107,6 +107,11 @@
*/
#define MMU_FTR_1T_SEGMENT ASM_CONST(0x40000000)
/*
* Supports KUAP (key 0 controlling userspace addresses) on radix
*/
#define MMU_FTR_RADIX_KUAP ASM_CONST(0x80000000)
/* MMU feature bit sets for various CPUs */
#define MMU_FTRS_DEFAULT_HPTE_ARCH_V2 \
MMU_FTR_HPTE_TABLE | MMU_FTR_PPCAS_ARCH_V2
@ -124,6 +129,9 @@
#ifndef __ASSEMBLY__
#include <linux/bug.h>
#include <asm/cputable.h>
#include <asm/page.h>
typedef pte_t *pgtable_t;
#ifdef CONFIG_PPC_FSL_BOOK3E
#include <asm/percpu.h>
@ -164,7 +172,10 @@ enum {
#endif
#ifdef CONFIG_PPC_RADIX_MMU
MMU_FTR_TYPE_RADIX |
#endif
#ifdef CONFIG_PPC_KUAP
MMU_FTR_RADIX_KUAP |
#endif /* CONFIG_PPC_KUAP */
#endif /* CONFIG_PPC_RADIX_MMU */
0,
};
@ -341,21 +352,6 @@ static inline bool strict_kernel_rwx_enabled(void)
*/
#define MMU_PAGE_COUNT 16
/*
* If we store section details in page->flags we can't increase the MAX_PHYSMEM_BITS
* if we increase SECTIONS_WIDTH we will not store node details in page->flags and
* page_to_nid does a page->section->node lookup
* Hence only increase for VMEMMAP. Further depending on SPARSEMEM_EXTREME reduce
* memory requirements with large number of sections.
* 51 bits is the max physical real address on POWER9
*/
#if defined(CONFIG_SPARSEMEM_VMEMMAP) && defined(CONFIG_SPARSEMEM_EXTREME) && \
defined (CONFIG_PPC_64K_PAGES)
#define MAX_PHYSMEM_BITS 51
#elif defined(CONFIG_PPC64)
#define MAX_PHYSMEM_BITS 46
#endif
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/mmu.h>
#else /* CONFIG_PPC_BOOK3S_64 */

7
arch/powerpc/include/asm/mmu_context.h
View File

@ -52,6 +52,7 @@ static inline bool mm_iommu_is_devmem(struct mm_struct *mm, unsigned long hpa,
{
return false;
}
static inline void mm_iommu_init(struct mm_struct *mm) { }
#endif
extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
extern void set_context(unsigned long id, pgd_t *pgd);
@ -228,13 +229,7 @@ static inline void enter_lazy_tlb(struct mm_struct *mm,
#endif
}
#ifdef CONFIG_PPC_BOOK3E_64
static inline void arch_exit_mmap(struct mm_struct *mm)
{
}
#else
extern void arch_exit_mmap(struct mm_struct *mm);
#endif
static inline void arch_unmap(struct mm_struct *mm,
struct vm_area_struct *vma,

44
arch/powerpc/include/asm/nohash/32/hugetlb-8xx.h Normal file
View File

@ -0,0 +1,44 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
#define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
#define PAGE_SHIFT_8M 23
static inline pte_t *hugepd_page(hugepd_t hpd)
{
BUG_ON(!hugepd_ok(hpd));
return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
}
static inline unsigned int hugepd_shift(hugepd_t hpd)
{
return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17;
}
static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
unsigned int pdshift)
{
unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> PAGE_SHIFT;
return hugepd_page(hpd) + idx;
}
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
flush_tlb_page(vma, vmaddr);
}
static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
{
*hpdp = __hugepd(__pa(new) | _PMD_USER | _PMD_PRESENT |
(pshift == PAGE_SHIFT_8M ? _PMD_PAGE_8M : _PMD_PAGE_512K));
}
static inline int check_and_get_huge_psize(int shift)
{
return shift_to_mmu_psize(shift);
}
#endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */

58
arch/powerpc/include/asm/nohash/32/kup-8xx.h Normal file
View File

@ -0,0 +1,58 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_KUP_8XX_H_
#define _ASM_POWERPC_KUP_8XX_H_
#include <asm/bug.h>
#ifdef CONFIG_PPC_KUAP
#ifdef __ASSEMBLY__
.macro kuap_save_and_lock sp, thread, gpr1, gpr2, gpr3
lis \gpr2, MD_APG_KUAP@h /* only APG0 and APG1 are used */
mfspr \gpr1, SPRN_MD_AP
mtspr SPRN_MD_AP, \gpr2
stw \gpr1, STACK_REGS_KUAP(\sp)
.endm
.macro kuap_restore sp, current, gpr1, gpr2, gpr3
lwz \gpr1, STACK_REGS_KUAP(\sp)
mtspr SPRN_MD_AP, \gpr1
.endm
.macro kuap_check current, gpr
#ifdef CONFIG_PPC_KUAP_DEBUG
mfspr \gpr, SPRN_MD_AP
rlwinm \gpr, \gpr, 16, 0xffff
999: twnei \gpr, MD_APG_KUAP@h
EMIT_BUG_ENTRY 999b, __FILE__, __LINE__, (BUGFLAG_WARNING | BUGFLAG_ONCE)
#endif
.endm
#else /* !__ASSEMBLY__ */
#include <asm/reg.h>
static inline void allow_user_access(void __user *to, const void __user *from,
unsigned long size)
{
mtspr(SPRN_MD_AP, MD_APG_INIT);
}
static inline void prevent_user_access(void __user *to, const void __user *from,
unsigned long size)
{
mtspr(SPRN_MD_AP, MD_APG_KUAP);
}
static inline bool bad_kuap_fault(struct pt_regs *regs, bool is_write)
{
return WARN(!((regs->kuap ^ MD_APG_KUAP) & 0xf0000000),
"Bug: fault blocked by AP register !");
}
#endif /* !__ASSEMBLY__ */
#endif /* CONFIG_PPC_KUAP */
#endif /* _ASM_POWERPC_KUP_8XX_H_ */

102
arch/powerpc/include/asm/nohash/32/mmu-8xx.h
View File

@ -35,11 +35,18 @@
* Then we use the APG to say whether accesses are according to Page rules or
* "all Supervisor" rules (Access to all)
* Therefore, we define 2 APG groups. lsb is _PMD_USER
* 0 => No user => 01 (all accesses performed according to page definition)
* 0 => Kernel => 01 (all accesses performed according to page definition)
* 1 => User => 00 (all accesses performed as supervisor iaw page definition)
* We define all 16 groups so that all other bits of APG can take any value
* 2-16 => NA => 11 (all accesses performed as user iaw page definition)
*/
#define MI_APG_INIT 0x44444444
#define MI_APG_INIT 0x4fffffff
/*
* 0 => Kernel => 01 (all accesses performed according to page definition)
* 1 => User => 10 (all accesses performed according to swaped page definition)
* 2-16 => NA => 11 (all accesses performed as user iaw page definition)
*/
#define MI_APG_KUEP 0x6fffffff
/* The effective page number register. When read, contains the information
* about the last instruction TLB miss. When MI_RPN is written, bits in
@ -108,11 +115,18 @@
* Then we use the APG to say whether accesses are according to Page rules or
* "all Supervisor" rules (Access to all)
* Therefore, we define 2 APG groups. lsb is _PMD_USER
* 0 => No user => 01 (all accesses performed according to page definition)
* 0 => Kernel => 01 (all accesses performed according to page definition)
* 1 => User => 00 (all accesses performed as supervisor iaw page definition)
* We define all 16 groups so that all other bits of APG can take any value
* 2-16 => NA => 11 (all accesses performed as user iaw page definition)
*/
#define MD_APG_INIT 0x44444444
#define MD_APG_INIT 0x4fffffff
/*
* 0 => No user => 01 (all accesses performed according to page definition)
* 1 => User => 10 (all accesses performed according to swaped page definition)
* 2-16 => NA => 11 (all accesses performed as user iaw page definition)
*/
#define MD_APG_KUAP 0x6fffffff
/* The effective page number register. When read, contains the information
* about the last instruction TLB miss. When MD_RPN is written, bits in
@ -167,9 +181,26 @@
#ifdef CONFIG_PPC_MM_SLICES
#include <asm/nohash/32/slice.h>
#define SLICE_ARRAY_SIZE (1 << (32 - SLICE_LOW_SHIFT - 1))
#define LOW_SLICE_ARRAY_SZ SLICE_ARRAY_SIZE
#endif
#if defined(CONFIG_PPC_4K_PAGES)
#define mmu_virtual_psize MMU_PAGE_4K
#elif defined(CONFIG_PPC_16K_PAGES)
#define mmu_virtual_psize MMU_PAGE_16K
#define PTE_FRAG_NR 4
#define PTE_FRAG_SIZE_SHIFT 12
#define PTE_FRAG_SIZE (1UL << 12)
#else
#error "Unsupported PAGE_SIZE"
#endif
#define mmu_linear_psize MMU_PAGE_8M
#ifndef __ASSEMBLY__
#include <linux/mmdebug.h>
struct slice_mask {
u64 low_slices;
DECLARE_BITMAP(high_slices, 0);
@ -185,14 +216,56 @@ typedef struct {
unsigned char high_slices_psize[0];
unsigned long slb_addr_limit;
struct slice_mask mask_base_psize; /* 4k or 16k */
# ifdef CONFIG_HUGETLB_PAGE
struct slice_mask mask_512k;
struct slice_mask mask_8m;
# endif
#endif
void *pte_frag;
} mm_context_t;
#ifdef CONFIG_PPC_MM_SLICES
static inline u16 mm_ctx_user_psize(mm_context_t *ctx)
{
return ctx->user_psize;
}
static inline void mm_ctx_set_user_psize(mm_context_t *ctx, u16 user_psize)
{
ctx->user_psize = user_psize;
}
static inline unsigned char *mm_ctx_low_slices(mm_context_t *ctx)
{
return ctx->low_slices_psize;
}
static inline unsigned char *mm_ctx_high_slices(mm_context_t *ctx)
{
return ctx->high_slices_psize;
}
static inline unsigned long mm_ctx_slb_addr_limit(mm_context_t *ctx)
{
return ctx->slb_addr_limit;
}
static inline void mm_ctx_set_slb_addr_limit(mm_context_t *ctx, unsigned long limit)
{
ctx->slb_addr_limit = limit;
}
static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
if (psize == MMU_PAGE_512K)
return &ctx->mask_512k;
if (psize == MMU_PAGE_8M)
return &ctx->mask_8m;
BUG_ON(psize != mmu_virtual_psize);
return &ctx->mask_base_psize;
}
#endif /* CONFIG_PPC_MM_SLICE */
#define PHYS_IMMR_BASE (mfspr(SPRN_IMMR) & 0xfff80000)
#define VIRT_IMMR_BASE (__fix_to_virt(FIX_IMMR_BASE))
@ -242,17 +315,4 @@ extern s32 patch__itlbmiss_perf, patch__dtlbmiss_perf;
#endif /* !__ASSEMBLY__ */
#if defined(CONFIG_PPC_4K_PAGES)
#define mmu_virtual_psize MMU_PAGE_4K
#elif defined(CONFIG_PPC_16K_PAGES)
#define mmu_virtual_psize MMU_PAGE_16K
#define PTE_FRAG_NR 4
#define PTE_FRAG_SIZE_SHIFT 12
#define PTE_FRAG_SIZE (1UL << 12)
#else
#error "Unsupported PAGE_SIZE"
#endif
#define mmu_linear_psize MMU_PAGE_8M
#endif /* _ASM_POWERPC_MMU_8XX_H_ */

25
arch/powerpc/include/asm/nohash/32/mmu.h
View File

@ -1,25 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_32_MMU_H_
#define _ASM_POWERPC_NOHASH_32_MMU_H_
#include <asm/page.h>
#if defined(CONFIG_40x)
/* 40x-style software loaded TLB */
#include <asm/nohash/32/mmu-40x.h>
#elif defined(CONFIG_44x)
/* 44x-style software loaded TLB */
#include <asm/nohash/32/mmu-44x.h>
#elif defined(CONFIG_PPC_BOOK3E_MMU)
/* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
#include <asm/nohash/mmu-book3e.h>
#elif defined (CONFIG_PPC_8xx)
/* Motorola/Freescale 8xx software loaded TLB */
#include <asm/nohash/32/mmu-8xx.h>
#endif
#ifndef __ASSEMBLY__
typedef pte_t *pgtable_t;
#endif
#endif /* _ASM_POWERPC_NOHASH_32_MMU_H_ */

123
arch/powerpc/include/asm/nohash/32/pgalloc.h
View File

@ -5,39 +5,6 @@
#include <linux/threads.h>
#include <linux/slab.h>
/*
* Functions that deal with pagetables that could be at any level of
* the table need to be passed an "index_size" so they know how to
* handle allocation. For PTE pages (which are linked to a struct
* page for now, and drawn from the main get_free_pages() pool), the
* allocation size will be (2^index_size * sizeof(pointer)) and
* allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
*
* The maximum index size needs to be big enough to allow any
* pagetable sizes we need, but small enough to fit in the low bits of
* any page table pointer. In other words all pagetables, even tiny
* ones, must be aligned to allow at least enough low 0 bits to
* contain this value. This value is also used as a mask, so it must
* be one less than a power of two.
*/
#define MAX_PGTABLE_INDEX_SIZE 0xf
extern void __bad_pte(pmd_t *pmd);
extern struct kmem_cache *pgtable_cache[];
#define PGT_CACHE(shift) pgtable_cache[shift]
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
pgtable_gfp_flags(mm, GFP_KERNEL));
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
}
/*
* We don't have any real pmd's, and this code never triggers because
* the pgd will always be present..
@ -47,96 +14,22 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
#define __pmd_free_tlb(tlb,x,a) do { } while (0)
/* #define pgd_populate(mm, pmd, pte) BUG() */
#ifndef CONFIG_BOOKE
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
pte_t *pte)
{
*pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
if (IS_ENABLED(CONFIG_BOOKE))
*pmdp = __pmd((unsigned long)pte | _PMD_PRESENT);
else
*pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
pgtable_t pte_page)
{
*pmdp = __pmd(__pa(pte_page) | _PMD_USER | _PMD_PRESENT);
if (IS_ENABLED(CONFIG_BOOKE))
*pmdp = __pmd((unsigned long)pte_page | _PMD_PRESENT);
else
*pmdp = __pmd(__pa(pte_page) | _PMD_USER | _PMD_PRESENT);
}
#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd))
#else
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
pte_t *pte)
{
*pmdp = __pmd((unsigned long)pte | _PMD_PRESENT);
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
pgtable_t pte_page)
{
*pmdp = __pmd((unsigned long)pte_page | _PMD_PRESENT);
}
#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd))
#endif
extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
extern pgtable_t pte_alloc_one(struct mm_struct *mm);
void pte_frag_destroy(void *pte_frag);
pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
void pte_fragment_free(unsigned long *table, int kernel);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
pte_fragment_free((unsigned long *)pte, 1);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pte_fragment_free((unsigned long *)ptepage, 0);
}
static inline void pgtable_free(void *table, unsigned index_size)
{
if (!index_size) {
pte_fragment_free((unsigned long *)table, 0);
} else {
BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE);
kmem_cache_free(PGT_CACHE(index_size), table);
}
}
#define check_pgt_cache() do { } while (0)
#define get_hugepd_cache_index(x) (x)
#ifdef CONFIG_SMP
static inline void pgtable_free_tlb(struct mmu_gather *tlb,
void *table, int shift)
{
unsigned long pgf = (unsigned long)table;
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
pgf |= shift;
tlb_remove_table(tlb, (void *)pgf);
}
static inline void __tlb_remove_table(void *_table)
{
void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
pgtable_free(table, shift);
}
#else
static inline void pgtable_free_tlb(struct mmu_gather *tlb,
void *table, int shift)
{
pgtable_free(table, shift);
}
#endif
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
unsigned long address)
{
tlb_flush_pgtable(tlb, address);
pgtable_free_tlb(tlb, table, 0);
}
#endif /* _ASM_POWERPC_PGALLOC_32_H */

13
arch/powerpc/include/asm/nohash/32/pgtable.h
View File

@ -64,15 +64,24 @@ extern int icache_44x_need_flush;
#define pgd_ERROR(e) \
pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
#ifndef __ASSEMBLY__
int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
#endif /* !__ASSEMBLY__ */
/*
* This is the bottom of the PKMAP area with HIGHMEM or an arbitrary
* value (for now) on others, from where we can start layout kernel
* virtual space that goes below PKMAP and FIXMAP
*/
#include <asm/fixmap.h>
#ifdef CONFIG_HIGHMEM
#define KVIRT_TOP PKMAP_BASE
#else
#define KVIRT_TOP (0xfe000000UL) /* for now, could be FIXMAP_BASE ? */
#define KVIRT_TOP FIXADDR_START
#endif
/*
@ -379,8 +388,6 @@ static inline int pte_young(pte_t pte)
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 3 })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 3 })
int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_POWERPC_NOHASH_32_PGTABLE_H */

2
arch/powerpc/include/asm/nohash/32/slice.h
View File

@ -13,6 +13,8 @@
#define SLICE_NUM_HIGH 0ul
#define GET_HIGH_SLICE_INDEX(addr) (addr & 0)
#define SLB_ADDR_LIMIT_DEFAULT DEFAULT_MAP_WINDOW
#endif /* CONFIG_PPC_MM_SLICES */
#endif /* _ASM_POWERPC_NOHASH_32_SLICE_H */

12
arch/powerpc/include/asm/nohash/64/mmu.h
View File

@ -1,12 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_64_MMU_H_
#define _ASM_POWERPC_NOHASH_64_MMU_H_
/* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
#include <asm/nohash/mmu-book3e.h>
#ifndef __ASSEMBLY__
typedef struct page *pgtable_t;
#endif
#endif /* _ASM_POWERPC_NOHASH_64_MMU_H_ */

117
arch/powerpc/include/asm/nohash/64/pgalloc.h
View File

@ -18,37 +18,6 @@ struct vmemmap_backing {
};
extern struct vmemmap_backing *vmemmap_list;
/*
* Functions that deal with pagetables that could be at any level of
* the table need to be passed an "index_size" so they know how to
* handle allocation. For PTE pages (which are linked to a struct
* page for now, and drawn from the main get_free_pages() pool), the
* allocation size will be (2^index_size * sizeof(pointer)) and
* allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
*
* The maximum index size needs to be big enough to allow any
* pagetable sizes we need, but small enough to fit in the low bits of
* any page table pointer. In other words all pagetables, even tiny
* ones, must be aligned to allow at least enough low 0 bits to
* contain this value. This value is also used as a mask, so it must
* be one less than a power of two.
*/
#define MAX_PGTABLE_INDEX_SIZE 0xf
extern struct kmem_cache *pgtable_cache[];
#define PGT_CACHE(shift) pgtable_cache[shift]
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
pgtable_gfp_flags(mm, GFP_KERNEL));
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
}
#define pgd_populate(MM, PGD, PUD) pgd_set(PGD, (unsigned long)PUD)
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
@ -76,11 +45,9 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
pgtable_t pte_page)
{
pmd_set(pmd, (unsigned long)page_address(pte_page));
pmd_set(pmd, (unsigned long)pte_page);
}
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX),
@ -92,91 +59,9 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
{
struct page *page;
pte_t *pte;
pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO | __GFP_ACCOUNT);
if (!pte)
return NULL;
page = virt_to_page(pte);
if (!pgtable_page_ctor(page)) {
__free_page(page);
return NULL;
}
return page;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pgtable_page_dtor(ptepage);
__free_page(ptepage);
}
static inline void pgtable_free(void *table, int shift)
{
if (!shift) {
pgtable_page_dtor(virt_to_page(table));
free_page((unsigned long)table);
} else {
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
kmem_cache_free(PGT_CACHE(shift), table);
}
}
#define get_hugepd_cache_index(x) (x)
#ifdef CONFIG_SMP
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
{
unsigned long pgf = (unsigned long)table;
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
pgf |= shift;
tlb_remove_table(tlb, (void *)pgf);
}
static inline void __tlb_remove_table(void *_table)
{
void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
pgtable_free(table, shift);
}
#else
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
{
pgtable_free(table, shift);
}
#endif
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
unsigned long address)
{
tlb_flush_pgtable(tlb, address);
pgtable_free_tlb(tlb, page_address(table), 0);
}
#define __pmd_free_tlb(tlb, pmd, addr) \
pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX)
#ifndef CONFIG_PPC_64K_PAGES
#define __pud_free_tlb(tlb, pud, addr) \
pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE)
#endif /* CONFIG_PPC_64K_PAGES */
#define check_pgt_cache() do { } while (0)
#endif /* _ASM_POWERPC_PGALLOC_64_H */

12
arch/powerpc/include/asm/nohash/64/pgtable.h
View File

@ -10,10 +10,6 @@
#include <asm/barrier.h>
#include <asm/asm-const.h>
#ifdef CONFIG_PPC_64K_PAGES
#error "Page size not supported"
#endif
#define FIRST_USER_ADDRESS 0UL
/*
@ -23,11 +19,7 @@
PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define PMD_CACHE_INDEX (PMD_INDEX_SIZE + 1)
#else
#define PMD_CACHE_INDEX PMD_INDEX_SIZE
#endif
#define PUD_CACHE_INDEX PUD_INDEX_SIZE
/*
@ -73,7 +65,6 @@
#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
#define VMEMMAP_REGION_ID (0xfUL) /* Server only */
#define USER_REGION_ID (0UL)
/*
@ -205,7 +196,8 @@ static inline void pgd_set(pgd_t *pgdp, unsigned long val)
(((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
#define pte_unmap(pte) do { } while(0)
static inline void pte_unmap(pte_t *pte) { }
/* to find an entry in a kernel page-table-directory */
/* This now only contains the vmalloc pages */

12
arch/powerpc/include/asm/nohash/64/slice.h
View File

@ -1,12 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_64_SLICE_H
#define _ASM_POWERPC_NOHASH_64_SLICE_H
#ifdef CONFIG_PPC_64K_PAGES
#define get_slice_psize(mm, addr) MMU_PAGE_64K
#else /* CONFIG_PPC_64K_PAGES */
#define get_slice_psize(mm, addr) MMU_PAGE_4K
#endif /* !CONFIG_PPC_64K_PAGES */
#define slice_set_user_psize(mm, psize) do { BUG(); } while (0)
#endif /* _ASM_POWERPC_NOHASH_64_SLICE_H */

45
arch/powerpc/include/asm/nohash/hugetlb-book3e.h Normal file
View File

@ -0,0 +1,45 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_HUGETLB_BOOK3E_H
#define _ASM_POWERPC_NOHASH_HUGETLB_BOOK3E_H
static inline pte_t *hugepd_page(hugepd_t hpd)
{
if (WARN_ON(!hugepd_ok(hpd)))
return NULL;
return (pte_t *)((hpd_val(hpd) & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
}
static inline unsigned int hugepd_shift(hugepd_t hpd)
{
return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
}
static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
unsigned int pdshift)
{
/*
* On FSL BookE, we have multiple higher-level table entries that
* point to the same hugepte. Just use the first one since they're all
* identical. So for that case, idx=0.
*/
return hugepd_page(hpd);
}
void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
{
/* We use the old format for PPC_FSL_BOOK3E */
*hpdp = __hugepd(((unsigned long)new & ~PD_HUGE) | pshift);
}
static inline int check_and_get_huge_psize(int shift)
{
if (shift & 1) /* Not a power of 4 */
return -EINVAL;
return shift_to_mmu_psize(shift);
}
#endif /* _ASM_POWERPC_NOHASH_HUGETLB_BOOK3E_H */

2
arch/powerpc/include/asm/nohash/mmu-book3e.h
View File

@ -306,6 +306,8 @@ extern int book3e_htw_mode;
#define mmu_cleanup_all NULL
#define MAX_PHYSMEM_BITS 44
#endif
#endif /* !__ASSEMBLY__ */

16
arch/powerpc/include/asm/nohash/mmu.h
View File

@ -2,10 +2,18 @@
#ifndef _ASM_POWERPC_NOHASH_MMU_H_
#define _ASM_POWERPC_NOHASH_MMU_H_
#ifdef CONFIG_PPC64
#include <asm/nohash/64/mmu.h>
#else
#include <asm/nohash/32/mmu.h>
#if defined(CONFIG_40x)
/* 40x-style software loaded TLB */
#include <asm/nohash/32/mmu-40x.h>
#elif defined(CONFIG_44x)
/* 44x-style software loaded TLB */
#include <asm/nohash/32/mmu-44x.h>
#elif defined(CONFIG_PPC_BOOK3E_MMU)
/* Freescale Book-E software loaded TLB or Book-3e (ISA 2.06+) MMU */
#include <asm/nohash/mmu-book3e.h>
#elif defined (CONFIG_PPC_8xx)
/* Motorola/Freescale 8xx software loaded TLB */
#include <asm/nohash/32/mmu-8xx.h>
#endif
#endif /* _ASM_POWERPC_NOHASH_MMU_H_ */

56
arch/powerpc/include/asm/nohash/pgalloc.h
View File

@ -3,6 +3,7 @@
#define _ASM_POWERPC_NOHASH_PGALLOC_H
#include <linux/mm.h>
#include <linux/slab.h>
extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
#ifdef CONFIG_PPC64
@ -16,9 +17,64 @@ static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
}
#endif /* !CONFIG_PPC_BOOK3E */
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
pgtable_gfp_flags(mm, GFP_KERNEL));
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
}
#ifdef CONFIG_PPC64
#include <asm/nohash/64/pgalloc.h>
#else
#include <asm/nohash/32/pgalloc.h>
#endif
static inline void pgtable_free(void *table, int shift)
{
if (!shift) {
pte_fragment_free((unsigned long *)table, 0);
} else {
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
kmem_cache_free(PGT_CACHE(shift), table);
}
}
#define get_hugepd_cache_index(x) (x)
#ifdef CONFIG_SMP
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
{
unsigned long pgf = (unsigned long)table;
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
pgf |= shift;
tlb_remove_table(tlb, (void *)pgf);
}
static inline void __tlb_remove_table(void *_table)
{
void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
pgtable_free(table, shift);
}
#else
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
{
pgtable_free(table, shift);
}
#endif
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
unsigned long address)
{
tlb_flush_pgtable(tlb, address);
pgtable_free_tlb(tlb, table, 0);
}
#endif /* _ASM_POWERPC_NOHASH_PGALLOC_H */

5
arch/powerpc/include/asm/nohash/pte-book3e.h
View File

@ -60,13 +60,8 @@
#define _PAGE_SPECIAL _PAGE_SW0
/* Base page size */
#ifdef CONFIG_PPC_64K_PAGES
#define _PAGE_PSIZE _PAGE_PSIZE_64K
#define PTE_RPN_SHIFT (28)
#else
#define _PAGE_PSIZE _PAGE_PSIZE_4K
#define PTE_RPN_SHIFT (24)
#endif
#define PTE_WIMGE_SHIFT (19)
#define PTE_BAP_SHIFT (2)

18
arch/powerpc/include/asm/opal-api.h
View File

@ -186,8 +186,8 @@
#define OPAL_XIVE_FREE_IRQ 140
#define OPAL_XIVE_SYNC 141
#define OPAL_XIVE_DUMP 142
#define OPAL_XIVE_RESERVED3 143
#define OPAL_XIVE_RESERVED4 144
#define OPAL_XIVE_GET_QUEUE_STATE 143
#define OPAL_XIVE_SET_QUEUE_STATE 144
#define OPAL_SIGNAL_SYSTEM_RESET 145
#define OPAL_NPU_INIT_CONTEXT 146
#define OPAL_NPU_DESTROY_CONTEXT 147
@ -209,8 +209,10 @@
#define OPAL_SENSOR_GROUP_ENABLE 163
#define OPAL_PCI_GET_PBCQ_TUNNEL_BAR 164
#define OPAL_PCI_SET_PBCQ_TUNNEL_BAR 165
#define OPAL_HANDLE_HMI2 166
#define OPAL_NX_COPROC_INIT 167
#define OPAL_LAST 167
#define OPAL_XIVE_GET_VP_STATE 170
#define OPAL_LAST 170
#define QUIESCE_HOLD 1 /* Spin all calls at entry */
#define QUIESCE_REJECT 2 /* Fail all calls with OPAL_BUSY */
@ -634,6 +636,15 @@ struct OpalHMIEvent {
} u;
};
/* OPAL_HANDLE_HMI2 out_flags */
enum {
OPAL_HMI_FLAGS_TB_RESYNC = (1ull << 0), /* Timebase has been resynced */
OPAL_HMI_FLAGS_DEC_LOST = (1ull << 1), /* DEC lost, needs to be reprogrammed */
OPAL_HMI_FLAGS_HDEC_LOST = (1ull << 2), /* HDEC lost, needs to be reprogrammed */
OPAL_HMI_FLAGS_TOD_TB_FAIL = (1ull << 3), /* TOD/TB recovery failed. */
OPAL_HMI_FLAGS_NEW_EVENT = (1ull << 63), /* An event has been created */
};
enum {
OPAL_P7IOC_DIAG_TYPE_NONE = 0,
OPAL_P7IOC_DIAG_TYPE_RGC = 1,
@ -1118,6 +1129,7 @@ enum {
enum {
OPAL_IMC_COUNTERS_NEST = 1,
OPAL_IMC_COUNTERS_CORE = 2,
OPAL_IMC_COUNTERS_TRACE = 3,
};

9
arch/powerpc/include/asm/opal.h
View File

@ -203,6 +203,7 @@ int64_t opal_set_param(uint64_t token, uint32_t param_id, uint64_t buffer,
int64_t opal_sensor_read(uint32_t sensor_hndl, int token, __be32 *sensor_data);
int64_t opal_sensor_read_u64(u32 sensor_hndl, int token, __be64 *sensor_data);
int64_t opal_handle_hmi(void);
int64_t opal_handle_hmi2(__be64 *out_flags);
int64_t opal_register_dump_region(uint32_t id, uint64_t start, uint64_t end);
int64_t opal_unregister_dump_region(uint32_t id);
int64_t opal_slw_set_reg(uint64_t cpu_pir, uint64_t sprn, uint64_t val);
@ -279,6 +280,13 @@ int64_t opal_xive_allocate_irq(uint32_t chip_id);
int64_t opal_xive_free_irq(uint32_t girq);
int64_t opal_xive_sync(uint32_t type, uint32_t id);
int64_t opal_xive_dump(uint32_t type, uint32_t id);
int64_t opal_xive_get_queue_state(uint64_t vp, uint32_t prio,
__be32 *out_qtoggle,
__be32 *out_qindex);
int64_t opal_xive_set_queue_state(uint64_t vp, uint32_t prio,
uint32_t qtoggle,
uint32_t qindex);
int64_t opal_xive_get_vp_state(uint64_t vp, __be64 *out_w01);
int64_t opal_pci_set_p2p(uint64_t phb_init, uint64_t phb_target,
uint64_t desc, uint16_t pe_number);
@ -352,6 +360,7 @@ int opal_power_control_init(void);
extern int opal_machine_check(struct pt_regs *regs);
extern bool opal_mce_check_early_recovery(struct pt_regs *regs);
extern int opal_hmi_exception_early(struct pt_regs *regs);
extern int opal_hmi_exception_early2(struct pt_regs *regs);
extern int opal_handle_hmi_exception(struct pt_regs *regs);
extern void opal_shutdown(void);

38
arch/powerpc/include/asm/paca.h
View File

@ -174,7 +174,6 @@ struct paca_struct {
u8 irq_soft_mask; /* mask for irq soft masking */
u8 irq_happened; /* irq happened while soft-disabled */
u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */
u8 nap_state_lost; /* NV GPR values lost in power7_idle */
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
u8 pmcregs_in_use; /* pseries puts this in lppaca */
#endif
@ -184,23 +183,28 @@ struct paca_struct {
#endif
#ifdef CONFIG_PPC_POWERNV
/* Per-core mask tracking idle threads and a lock bit-[L][TTTTTTTT] */
u32 *core_idle_state_ptr;
u8 thread_idle_state; /* PNV_THREAD_RUNNING/NAP/SLEEP */
/* Mask to indicate thread id in core */
u8 thread_mask;
/* Mask to denote subcore sibling threads */
u8 subcore_sibling_mask;
/* Flag to request this thread not to stop */
atomic_t dont_stop;
/* The PSSCR value that the kernel requested before going to stop */
u64 requested_psscr;
/* PowerNV idle fields */
/* PNV_CORE_IDLE_* bits, all siblings work on thread 0 paca */
unsigned long idle_state;
union {
/* P7/P8 specific fields */
struct {
/* PNV_THREAD_RUNNING/NAP/SLEEP */
u8 thread_idle_state;
/* Mask to denote subcore sibling threads */
u8 subcore_sibling_mask;
};
/*
* Save area for additional SPRs that need to be
* saved/restored during cpuidle stop.
*/
struct stop_sprs stop_sprs;
/* P9 specific fields */
struct {
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
/* The PSSCR value that the kernel requested before going to stop */
u64 requested_psscr;
/* Flag to request this thread not to stop */
atomic_t dont_stop;
#endif
};
};
#endif
#ifdef CONFIG_PPC_BOOK3S_64

23
arch/powerpc/include/asm/page.h
View File

@ -28,11 +28,15 @@
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
#ifndef __ASSEMBLY__
#ifdef CONFIG_HUGETLB_PAGE
extern bool hugetlb_disabled;
extern unsigned int HPAGE_SHIFT;
#else
#ifndef CONFIG_HUGETLB_PAGE
#define HPAGE_SHIFT PAGE_SHIFT
#elif defined(CONFIG_PPC_BOOK3S_64)
extern unsigned int hpage_shift;
#define HPAGE_SHIFT hpage_shift
#elif defined(CONFIG_PPC_8xx)
#define HPAGE_SHIFT 19 /* 512k pages */
#elif defined(CONFIG_PPC_FSL_BOOK3E)
#define HPAGE_SHIFT 22 /* 4M pages */
#endif
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
@ -132,18 +136,7 @@ static inline bool pfn_valid(unsigned long pfn)
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#ifdef CONFIG_PPC_BOOK3S_64
/*
* On hash the vmalloc and other regions alias to the kernel region when passed
* through __pa(), which virt_to_pfn() uses. That means virt_addr_valid() can
* return true for some vmalloc addresses, which is incorrect. So explicitly
* check that the address is in the kernel region.
*/
#define virt_addr_valid(kaddr) (REGION_ID(kaddr) == KERNEL_REGION_ID && \
pfn_valid(virt_to_pfn(kaddr)))
#else
#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
#endif
/*
* On Book-E parts we need __va to parse the device tree and we can't

51
arch/powerpc/include/asm/pgalloc.h
View File

@ -20,10 +20,61 @@ static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)
pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
return (pte_t *)pte_fragment_alloc(mm, 1);
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
{
return (pgtable_t)pte_fragment_alloc(mm, 0);
}
void pte_frag_destroy(void *pte_frag);
void pte_fragment_free(unsigned long *table, int kernel);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
pte_fragment_free((unsigned long *)pte, 1);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pte_fragment_free((unsigned long *)ptepage, 0);
}
/*
* Functions that deal with pagetables that could be at any level of
* the table need to be passed an "index_size" so they know how to
* handle allocation. For PTE pages, the allocation size will be
* (2^index_size * sizeof(pointer)) and allocations are drawn from
* the kmem_cache in PGT_CACHE(index_size).
*
* The maximum index size needs to be big enough to allow any
* pagetable sizes we need, but small enough to fit in the low bits of
* any page table pointer. In other words all pagetables, even tiny
* ones, must be aligned to allow at least enough low 0 bits to
* contain this value. This value is also used as a mask, so it must
* be one less than a power of two.
*/
#define MAX_PGTABLE_INDEX_SIZE 0xf
extern struct kmem_cache *pgtable_cache[];
#define PGT_CACHE(shift) pgtable_cache[shift]
static inline void check_pgt_cache(void) { }
#ifdef CONFIG_PPC_BOOK3S
#include <asm/book3s/pgalloc.h>
#else
#include <asm/nohash/pgalloc.h>
#endif
static inline pgtable_t pmd_pgtable(pmd_t pmd)
{
return (pgtable_t)pmd_page_vaddr(pmd);
}
#endif /* _ASM_POWERPC_PGALLOC_H */

9
arch/powerpc/include/asm/pgtable-be-types.h
View File

@ -33,11 +33,7 @@ static inline __be64 pmd_raw(pmd_t x)
return x.pmd;
}
/*
* 64 bit hash always use 4 level table. Everybody else use 4 level
* only for 4K page size.
*/
#if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES)
/* 64 bit always use 4 level table. */
typedef struct { __be64 pud; } pud_t;
#define __pud(x) ((pud_t) { cpu_to_be64(x) })
#define __pud_raw(x) ((pud_t) { (x) })
@ -51,7 +47,6 @@ static inline __be64 pud_raw(pud_t x)
return x.pud;
}
#endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */
#endif /* CONFIG_PPC64 */
/* PGD level */
@ -77,7 +72,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
* With hash config 64k pages additionally define a bigger "real PTE" type that
* gathers the "second half" part of the PTE for pseudo 64k pages
*/
#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_BOOK3S_64)
#ifdef CONFIG_PPC_64K_PAGES
typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
#else
typedef struct { pte_t pte; } real_pte_t;

9
arch/powerpc/include/asm/pgtable-types.h
View File

@ -23,18 +23,13 @@ static inline unsigned long pmd_val(pmd_t x)
return x.pmd;
}
/*
* 64 bit hash always use 4 level table. Everybody else use 4 level
* only for 4K page size.
*/
#if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES)
/* 64 bit always use 4 level table. */
typedef struct { unsigned long pud; } pud_t;
#define __pud(x) ((pud_t) { (x) })
static inline unsigned long pud_val(pud_t x)
{
return x.pud;
}
#endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */
#endif /* CONFIG_PPC64 */
/* PGD level */
@ -54,7 +49,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
* With hash config 64k pages additionally define a bigger "real PTE" type that
* gathers the "second half" part of the PTE for pseudo 64k pages
*/
#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_BOOK3S_64)
#ifdef CONFIG_PPC_64K_PAGES
typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
#else
typedef struct { pte_t pte; } real_pte_t;

9
arch/powerpc/include/asm/pgtable.h
View File

@ -89,9 +89,6 @@ extern void paging_init(void);
*/
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
unsigned long end, int write,
struct page **pages, int *nr);
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_large(pmd) 0
#endif
@ -108,6 +105,12 @@ void mark_initmem_nx(void);
static inline void mark_initmem_nx(void) { }
#endif
#ifdef CONFIG_PPC_DEBUG_WX
void ptdump_check_wx(void);
#else
static inline void ptdump_check_wx(void) { }
#endif
/*
* When used, PTE_FRAG_NR is defined in subarch pgtable.h
* so we are sure it is included when arriving here.

12
arch/powerpc/include/asm/processor.h
View File

@ -163,6 +163,9 @@ struct thread_struct {
#ifdef CONFIG_PPC_RTAS
unsigned long rtas_sp; /* stack pointer for when in RTAS */
#endif
#endif
#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP)
unsigned long kuap; /* opened segments for user access */
#endif
/* Debug Registers */
struct debug_reg debug;
@ -411,14 +414,17 @@ static inline unsigned long get_clean_sp(unsigned long sp, int is_32)
}
#endif
/* asm stubs */
extern unsigned long isa300_idle_stop_noloss(unsigned long psscr_val);
extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val);
extern unsigned long isa206_idle_insn_mayloss(unsigned long type);
extern unsigned long cpuidle_disable;
enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
extern int powersave_nap; /* set if nap mode can be used in idle loop */
extern unsigned long power7_idle_insn(unsigned long type); /* PNV_THREAD_NAP/etc*/
extern void power7_idle_type(unsigned long type);
extern unsigned long power9_idle_stop(unsigned long psscr_val);
extern unsigned long power9_offline_stop(unsigned long psscr_val);
extern void power9_idle_type(unsigned long stop_psscr_val,
unsigned long stop_psscr_mask);

11
arch/powerpc/include/asm/ptrace.h
View File

@ -52,10 +52,17 @@ struct pt_regs
};
};
union {
struct {
#ifdef CONFIG_PPC64
unsigned long ppr;
unsigned long __pad; /* Maintain 16 byte interrupt stack alignment */
unsigned long ppr;
#endif
#ifdef CONFIG_PPC_KUAP
unsigned long kuap;
#endif
};
unsigned long __pad[2]; /* Maintain 16 byte interrupt stack alignment */
};
};
#endif

8
arch/powerpc/include/asm/reg.h
View File

@ -168,6 +168,7 @@
#define PSSCR_ESL 0x00200000 /* Enable State Loss */
#define PSSCR_SD 0x00400000 /* Status Disable */
#define PSSCR_PLS 0xf000000000000000 /* Power-saving Level Status */
#define PSSCR_PLS_SHIFT 60
#define PSSCR_GUEST_VIS 0xf0000000000003ffUL /* Guest-visible PSSCR fields */
#define PSSCR_FAKE_SUSPEND 0x00000400 /* Fake-suspend bit (P9 DD2.2) */
#define PSSCR_FAKE_SUSPEND_LG 10 /* Fake-suspend bit position */
@ -758,10 +759,9 @@
#define SRR1_WAKERESET 0x00100000 /* System reset */
#define SRR1_WAKEHDBELL 0x000c0000 /* Hypervisor doorbell on P8 */
#define SRR1_WAKESTATE 0x00030000 /* Powersave exit mask [46:47] */
#define SRR1_WS_DEEPEST 0x00030000 /* Some resources not maintained,
* may not be recoverable */
#define SRR1_WS_DEEPER 0x00020000 /* Some resources not maintained */
#define SRR1_WS_DEEP 0x00010000 /* All resources maintained */
#define SRR1_WS_HVLOSS 0x00030000 /* HV resources not maintained */
#define SRR1_WS_GPRLOSS 0x00020000 /* GPRs not maintained */
#define SRR1_WS_NOLOSS 0x00010000 /* All resources maintained */
#define SRR1_PROGTM 0x00200000 /* TM Bad Thing */
#define SRR1_PROGFPE 0x00100000 /* Floating Point Enabled */
#define SRR1_PROGILL 0x00080000 /* Illegal instruction */

2
arch/powerpc/include/asm/reg_booke.h
View File

@ -41,7 +41,7 @@
#if defined(CONFIG_PPC_BOOK3E_64)
#define MSR_64BIT MSR_CM
#define MSR_ (MSR_ME | MSR_CE)
#define MSR_ (MSR_ME | MSR_RI | MSR_CE)
#define MSR_KERNEL (MSR_ | MSR_64BIT)
#define MSR_USER32 (MSR_ | MSR_PR | MSR_EE)
#define MSR_USER64 (MSR_USER32 | MSR_64BIT)

9
arch/powerpc/include/asm/slice.h
View File

@ -4,9 +4,7 @@
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/slice.h>
#elif defined(CONFIG_PPC64)
#include <asm/nohash/64/slice.h>
#elif defined(CONFIG_PPC_MMU_NOHASH)
#elif defined(CONFIG_PPC_MMU_NOHASH_32)
#include <asm/nohash/32/slice.h>
#endif
@ -38,6 +36,11 @@ void slice_setup_new_exec(void);
static inline void slice_init_new_context_exec(struct mm_struct *mm) {}
static inline unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr)
{
return 0;
}
#endif /* CONFIG_PPC_MM_SLICES */
#endif /* __ASSEMBLY__ */

4
arch/powerpc/include/asm/sparsemem.h
View File

@ -17,9 +17,9 @@ extern int create_section_mapping(unsigned long start, unsigned long end, int ni
extern int remove_section_mapping(unsigned long start, unsigned long end);
#ifdef CONFIG_PPC_BOOK3S_64
extern void resize_hpt_for_hotplug(unsigned long new_mem_size);
extern int resize_hpt_for_hotplug(unsigned long new_mem_size);
#else
static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { }
static inline int resize_hpt_for_hotplug(unsigned long new_mem_size) { return 0; }
#endif
#ifdef CONFIG_NUMA

32
arch/powerpc/include/asm/string.h
View File

@ -4,14 +4,17 @@
#ifdef __KERNEL__
#ifndef CONFIG_KASAN
#define __HAVE_ARCH_STRNCPY
#define __HAVE_ARCH_STRNCMP
#define __HAVE_ARCH_MEMCHR
#define __HAVE_ARCH_MEMCMP
#define __HAVE_ARCH_MEMSET16
#endif
#define __HAVE_ARCH_MEMSET
#define __HAVE_ARCH_MEMCPY
#define __HAVE_ARCH_MEMMOVE
#define __HAVE_ARCH_MEMCMP
#define __HAVE_ARCH_MEMCHR
#define __HAVE_ARCH_MEMSET16
#define __HAVE_ARCH_MEMCPY_FLUSHCACHE
extern char * strcpy(char *,const char *);
@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
extern void * memchr(const void *,int,__kernel_size_t);
extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
void *__memset(void *s, int c, __kernel_size_t count);
void *__memcpy(void *to, const void *from, __kernel_size_t n);
void *__memmove(void *to, const void *from, __kernel_size_t n);
#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
/*
* For files that are not instrumented (e.g. mm/slub.c) we
* should use not instrumented version of mem* functions.
*/
#define memcpy(dst, src, len) __memcpy(dst, src, len)
#define memmove(dst, src, len) __memmove(dst, src, len)
#define memset(s, c, n) __memset(s, c, n)
#ifndef __NO_FORTIFY
#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
#endif
#endif
#ifdef CONFIG_PPC64
#ifndef CONFIG_KASAN
#define __HAVE_ARCH_MEMSET32
#define __HAVE_ARCH_MEMSET64
@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
{
return __memset64(p, v, n * 8);
}
#endif
#else
#ifndef CONFIG_KASAN
#define __HAVE_ARCH_STRLEN
#endif
extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
#endif

2
arch/powerpc/include/asm/task_size_64.h
View File

@ -20,7 +20,7 @@
/*
* For now 512TB is only supported with book3s and 64K linux page size.
*/
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
#ifdef CONFIG_PPC_64K_PAGES
/*
* Max value currently used:
*/

2
arch/powerpc/include/asm/time.h
View File

@ -36,6 +36,8 @@ extern unsigned long ppc_proc_freq;
extern unsigned long ppc_tb_freq;
#define DEFAULT_TB_FREQ 125000000UL
extern bool tb_invalid;
struct div_result {
u64 result_high;
u64 result_low;

16
arch/powerpc/include/asm/trace.h
View File

@ -54,6 +54,22 @@ DEFINE_EVENT(ppc64_interrupt_class, timer_interrupt_exit,
TP_ARGS(regs)
);
#ifdef CONFIG_PPC_DOORBELL
DEFINE_EVENT(ppc64_interrupt_class, doorbell_entry,
TP_PROTO(struct pt_regs *regs),
TP_ARGS(regs)
);
DEFINE_EVENT(ppc64_interrupt_class, doorbell_exit,
TP_PROTO(struct pt_regs *regs),
TP_ARGS(regs)
);
#endif
#ifdef CONFIG_PPC_PSERIES
extern int hcall_tracepoint_regfunc(void);
extern void hcall_tracepoint_unregfunc(void);

38
arch/powerpc/include/asm/uaccess.h
View File

@ -6,6 +6,7 @@
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/extable.h>
#include <asm/kup.h>
/*
* The fs value determines whether argument validity checking should be
@ -140,6 +141,7 @@ extern long __put_user_bad(void);
#define __put_user_size(x, ptr, size, retval) \
do { \
retval = 0; \
allow_write_to_user(ptr, size); \
switch (size) { \
case 1: __put_user_asm(x, ptr, retval, "stb"); break; \
case 2: __put_user_asm(x, ptr, retval, "sth"); break; \
@ -147,6 +149,7 @@ do { \
case 8: __put_user_asm2(x, ptr, retval); break; \
default: __put_user_bad(); \
} \
prevent_write_to_user(ptr, size); \
} while (0)
#define __put_user_nocheck(x, ptr, size) \
@ -239,6 +242,7 @@ do { \
__chk_user_ptr(ptr); \
if (size > sizeof(x)) \
(x) = __get_user_bad(); \
allow_read_from_user(ptr, size); \
switch (size) { \
case 1: __get_user_asm(x, ptr, retval, "lbz"); break; \
case 2: __get_user_asm(x, ptr, retval, "lhz"); break; \
@ -246,6 +250,7 @@ do { \
case 8: __get_user_asm2(x, ptr, retval); break; \
default: (x) = __get_user_bad(); \
} \
prevent_read_from_user(ptr, size); \
} while (0)
/*
@ -305,15 +310,21 @@ extern unsigned long __copy_tofrom_user(void __user *to,
static inline unsigned long
raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
return __copy_tofrom_user(to, from, n);
unsigned long ret;
allow_user_access(to, from, n);
ret = __copy_tofrom_user(to, from, n);
prevent_user_access(to, from, n);
return ret;
}
#endif /* __powerpc64__ */
static inline unsigned long raw_copy_from_user(void *to,
const void __user *from, unsigned long n)
{
unsigned long ret;
if (__builtin_constant_p(n) && (n <= 8)) {
unsigned long ret = 1;
ret = 1;
switch (n) {
case 1:
@ -338,14 +349,18 @@ static inline unsigned long raw_copy_from_user(void *to,
}
barrier_nospec();
return __copy_tofrom_user((__force void __user *)to, from, n);
allow_read_from_user(from, n);
ret = __copy_tofrom_user((__force void __user *)to, from, n);
prevent_read_from_user(from, n);
return ret;
}
static inline unsigned long raw_copy_to_user(void __user *to,
const void *from, unsigned long n)
{
unsigned long ret;
if (__builtin_constant_p(n) && (n <= 8)) {
unsigned long ret = 1;
ret = 1;
switch (n) {
case 1:
@ -365,17 +380,24 @@ static inline unsigned long raw_copy_to_user(void __user *to,
return 0;
}
return __copy_tofrom_user(to, (__force const void __user *)from, n);
allow_write_to_user(to, n);
ret = __copy_tofrom_user(to, (__force const void __user *)from, n);
prevent_write_to_user(to, n);
return ret;
}
extern unsigned long __clear_user(void __user *addr, unsigned long size);
static inline unsigned long clear_user(void __user *addr, unsigned long size)
{
unsigned long ret = size;
might_fault();
if (likely(access_ok(addr, size)))
return __clear_user(addr, size);
return size;
if (likely(access_ok(addr, size))) {
allow_write_to_user(addr, size);
ret = __clear_user(addr, size);
prevent_write_to_user(addr, size);
}
return ret;
}
extern long strncpy_from_user(char *dst, const char __user *src, long count);

14
arch/powerpc/include/asm/xive.h
View File

@ -109,12 +109,26 @@ extern int xive_native_configure_queue(u32 vp_id, struct xive_q *q, u8 prio,
extern void xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio);
extern void xive_native_sync_source(u32 hw_irq);
extern void xive_native_sync_queue(u32 hw_irq);
extern bool is_xive_irq(struct irq_chip *chip);
extern int xive_native_enable_vp(u32 vp_id, bool single_escalation);
extern int xive_native_disable_vp(u32 vp_id);
extern int xive_native_get_vp_info(u32 vp_id, u32 *out_cam_id, u32 *out_chip_id);
extern bool xive_native_has_single_escalation(void);
extern int xive_native_get_queue_info(u32 vp_id, uint32_t prio,
u64 *out_qpage,
u64 *out_qsize,
u64 *out_qeoi_page,
u32 *out_escalate_irq,
u64 *out_qflags);
extern int xive_native_get_queue_state(u32 vp_id, uint32_t prio, u32 *qtoggle,
u32 *qindex);
extern int xive_native_set_queue_state(u32 vp_id, uint32_t prio, u32 qtoggle,
u32 qindex);
extern int xive_native_get_vp_state(u32 vp_id, u64 *out_state);
#else
static inline bool xive_enabled(void) { return false; }

14
arch/powerpc/kernel/Makefile
View File

@ -31,6 +31,18 @@ CFLAGS_REMOVE_btext.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_prom.o = $(CC_FLAGS_FTRACE)
endif
KASAN_SANITIZE_early_32.o := n
KASAN_SANITIZE_cputable.o := n
KASAN_SANITIZE_prom_init.o := n
KASAN_SANITIZE_btext.o := n
ifdef CONFIG_KASAN
CFLAGS_early_32.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
endif
obj-y := cputable.o ptrace.o syscalls.o \
irq.o align.o signal_32.o pmc.o vdso.o \
process.o systbl.o idle.o \
@ -93,7 +105,7 @@ extra-y += vmlinux.lds
obj-$(CONFIG_RELOCATABLE) += reloc_$(BITS).o
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o early_32.o
obj-$(CONFIG_PPC64) += dma-iommu.o iommu.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_BOOTX_TEXT) += btext.o

25
arch/powerpc/kernel/asm-offsets.c
View File

@ -147,6 +147,9 @@ int main(void)
#if defined(CONFIG_KVM) && defined(CONFIG_BOOKE)
OFFSET(THREAD_KVM_VCPU, thread_struct, kvm_vcpu);
#endif
#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP)
OFFSET(KUAP, thread_struct, kuap);
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
OFFSET(PACATMSCRATCH, paca_struct, tm_scratch);
@ -268,7 +271,6 @@ int main(void)
OFFSET(ACCOUNT_USER_TIME, paca_struct, accounting.utime);
OFFSET(ACCOUNT_SYSTEM_TIME, paca_struct, accounting.stime);
OFFSET(PACA_TRAP_SAVE, paca_struct, trap_save);
OFFSET(PACA_NAPSTATELOST, paca_struct, nap_state_lost);
OFFSET(PACA_SPRG_VDSO, paca_struct, sprg_vdso);
#else /* CONFIG_PPC64 */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
@ -332,6 +334,10 @@ int main(void)
STACK_PT_REGS_OFFSET(_PPR, ppr);
#endif /* CONFIG_PPC64 */
#ifdef CONFIG_PPC_KUAP
STACK_PT_REGS_OFFSET(STACK_REGS_KUAP, kuap);
#endif
#if defined(CONFIG_PPC32)
#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
DEFINE(EXC_LVL_SIZE, STACK_EXC_LVL_FRAME_SIZE);
@ -766,23 +772,6 @@ int main(void)
OFFSET(VCPU_TIMING_LAST_ENTER_TBL, kvm_vcpu, arch.timing_last_enter.tv32.tbl);
#endif
#ifdef CONFIG_PPC_POWERNV
OFFSET(PACA_CORE_IDLE_STATE_PTR, paca_struct, core_idle_state_ptr);
OFFSET(PACA_THREAD_IDLE_STATE, paca_struct, thread_idle_state);
OFFSET(PACA_THREAD_MASK, paca_struct, thread_mask);
OFFSET(PACA_SUBCORE_SIBLING_MASK, paca_struct, subcore_sibling_mask);
OFFSET(PACA_REQ_PSSCR, paca_struct, requested_psscr);
OFFSET(PACA_DONT_STOP, paca_struct, dont_stop);
#define STOP_SPR(x, f) OFFSET(x, paca_struct, stop_sprs.f)
STOP_SPR(STOP_PID, pid);
STOP_SPR(STOP_LDBAR, ldbar);
STOP_SPR(STOP_FSCR, fscr);
STOP_SPR(STOP_HFSCR, hfscr);
STOP_SPR(STOP_MMCR1, mmcr1);
STOP_SPR(STOP_MMCR2, mmcr2);
STOP_SPR(STOP_MMCRA, mmcra);
#endif
DEFINE(PPC_DBELL_SERVER, PPC_DBELL_SERVER);
DEFINE(PPC_DBELL_MSGTYPE, PPC_DBELL_MSGTYPE);

13
arch/powerpc/kernel/cacheinfo.c
View File

@ -759,23 +759,22 @@ static void cacheinfo_create_index_dir(struct cache *cache, int index,
index_dir = kzalloc(sizeof(*index_dir), GFP_KERNEL);
if (!index_dir)
goto err;
return;
index_dir->cache = cache;
rc = kobject_init_and_add(&index_dir->kobj, &cache_index_type,
cache_dir->kobj, "index%d", index);
if (rc)
goto err;
if (rc) {
kobject_put(&index_dir->kobj);
kfree(index_dir);
return;
}
index_dir->next = cache_dir->index;
cache_dir->index = index_dir;
cacheinfo_create_index_opt_attrs(index_dir);
return;
err:
kfree(index_dir);
}
static void cacheinfo_sysfs_populate(unsigned int cpu_id,

13
arch/powerpc/kernel/cputable.c
View File

@ -2147,7 +2147,11 @@ void __init set_cur_cpu_spec(struct cpu_spec *s)
struct cpu_spec *t = &the_cpu_spec;
t = PTRRELOC(t);
*t = *s;
/*
* use memcpy() instead of *t = *s so that GCC replaces it
* by __memcpy() when KASAN is active
*/
memcpy(t, s, sizeof(*t));
*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
}
@ -2161,8 +2165,11 @@ static struct cpu_spec * __init setup_cpu_spec(unsigned long offset,
t = PTRRELOC(t);
old = *t;
/* Copy everything, then do fixups */
*t = *s;
/*
* Copy everything, then do fixups. Use memcpy() instead of *t = *s
* so that GCC replaces it by __memcpy() when KASAN is active
*/
memcpy(t, s, sizeof(*t));
/*
* If we are overriding a previous value derived from the real

3
arch/powerpc/kernel/dbell.c
View File

@ -18,6 +18,7 @@
#include <asm/dbell.h>
#include <asm/irq_regs.h>
#include <asm/kvm_ppc.h>
#include <asm/trace.h>
#ifdef CONFIG_SMP
@ -81,6 +82,7 @@ void doorbell_exception(struct pt_regs *regs)
struct pt_regs *old_regs = set_irq_regs(regs);
irq_enter();
trace_doorbell_entry(regs);
ppc_msgsync();
@ -91,6 +93,7 @@ void doorbell_exception(struct pt_regs *regs)
smp_ipi_demux_relaxed(); /* already performed the barrier */
trace_doorbell_exit(regs);
irq_exit();
set_irq_regs(old_regs);
}

36
arch/powerpc/kernel/early_32.c Normal file
View File

@ -0,0 +1,36 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Early init before relocation
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <asm/setup.h>
#include <asm/sections.h>
#include <asm/asm-prototypes.h>
/*
* We're called here very early in the boot.
*
* Note that the kernel may be running at an address which is different
* from the address that it was linked at, so we must use RELOC/PTRRELOC
* to access static data (including strings). -- paulus
*/
notrace unsigned long __init early_init(unsigned long dt_ptr)
{
unsigned long offset = reloc_offset();
/* First zero the BSS */
memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
/*
* Identify the CPU type and fix up code sections
* that depend on which cpu we have.
*/
identify_cpu(offset, mfspr(SPRN_PVR));
apply_feature_fixups();
return KERNELBASE + offset;
}

186
arch/powerpc/kernel/entry_32.S
View File

@ -36,15 +36,10 @@
#include <asm/asm-405.h>
#include <asm/feature-fixups.h>
#include <asm/barrier.h>
#include <asm/kup.h>
#include <asm/bug.h>
/*
* MSR_KERNEL is > 0x10000 on 4xx/Book-E since it include MSR_CE.
*/
#if MSR_KERNEL >= 0x10000
#define LOAD_MSR_KERNEL(r, x) lis r,(x)@h; ori r,r,(x)@l
#else
#define LOAD_MSR_KERNEL(r, x) li r,(x)
#endif
#include "head_32.h"
/*
* Align to 4k in order to ensure that all functions modyfing srr0/srr1
@ -150,8 +145,8 @@ transfer_to_handler:
stw r12,_CTR(r11)
stw r2,_XER(r11)
mfspr r12,SPRN_SPRG_THREAD
addi r2,r12,-THREAD
beq 2f /* if from user, fix up THREAD.regs */
addi r2, r12, -THREAD
addi r11,r1,STACK_FRAME_OVERHEAD
stw r11,PT_REGS(r12)
#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
@ -161,6 +156,9 @@ transfer_to_handler:
andis. r12,r12,DBCR0_IDM@h
#endif
ACCOUNT_CPU_USER_ENTRY(r2, r11, r12)
#ifdef CONFIG_PPC_BOOK3S_32
kuep_lock r11, r12
#endif
#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
beq+ 3f
/* From user and task is ptraced - load up global dbcr0 */
@ -186,6 +184,8 @@ transfer_to_handler:
2: /* if from kernel, check interrupted DOZE/NAP mode and
* check for stack overflow
*/
kuap_save_and_lock r11, r12, r9, r2, r0
addi r2, r12, -THREAD
lwz r9,KSP_LIMIT(r12)
cmplw r1,r9 /* if r1 <= ksp_limit */
ble- stack_ovf /* then the kernel stack overflowed */
@ -207,26 +207,43 @@ transfer_to_handler_cont:
mtspr SPRN_NRI, r0
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* When tracing IRQ state (lockdep) we enable the MMU before we call
* the IRQ tracing functions as they might access vmalloc space or
* perform IOs for console output.
*
* To speed up the syscall path where interrupts stay on, let's check
* first if we are changing the MSR value at all.
*/
tophys(r12, r1)
lwz r12,_MSR(r12)
andi. r12,r12,MSR_EE
bne 1f
/* MSR isn't changing, just transition directly */
#endif
mtspr SPRN_SRR0,r11
mtspr SPRN_SRR1,r10
mtlr r9
SYNC
RFI /* jump to handler, enable MMU */
#ifdef CONFIG_TRACE_IRQFLAGS
1: /* MSR is changing, re-enable MMU so we can notify lockdep. We need to
* keep interrupts disabled at this point otherwise we might risk
* taking an interrupt before we tell lockdep they are enabled.
*/
lis r12,reenable_mmu@h
ori r12,r12,reenable_mmu@l
LOAD_MSR_KERNEL(r0, MSR_KERNEL)
mtspr SPRN_SRR0,r12
mtspr SPRN_SRR1,r10
mtspr SPRN_SRR1,r0
SYNC
RFI
reenable_mmu: /* re-enable mmu so we can */
mfmsr r10
lwz r12,_MSR(r1)
xor r10,r10,r12
andi. r10,r10,MSR_EE /* Did EE change? */
beq 1f
reenable_mmu:
/*
* The trace_hardirqs_off will use CALLER_ADDR0 and CALLER_ADDR1.
* If from user mode there is only one stack frame on the stack, and
* accessing CALLER_ADDR1 will cause oops. So we need create a dummy
* stack frame to make trace_hardirqs_off happy.
*
* This is handy because we also need to save a bunch of GPRs,
* We save a bunch of GPRs,
* r3 can be different from GPR3(r1) at this point, r9 and r11
* contains the old MSR and handler address respectively,
* r4 & r5 can contain page fault arguments that need to be passed
@ -234,14 +251,19 @@ reenable_mmu: /* re-enable mmu so we can */
* they aren't useful past this point (aren't syscall arguments),
* the rest is restored from the exception frame.
*/
stwu r1,-32(r1)
stw r9,8(r1)
stw r11,12(r1)
stw r3,16(r1)
stw r4,20(r1)
stw r5,24(r1)
bl trace_hardirqs_off
lwz r5,24(r1)
/* If we are disabling interrupts (normal case), simply log it with
* lockdep
*/
1: bl trace_hardirqs_off
2: lwz r5,24(r1)
lwz r4,20(r1)
lwz r3,16(r1)
lwz r11,12(r1)
@ -251,15 +273,9 @@ reenable_mmu: /* re-enable mmu so we can */
lwz r6,GPR6(r1)
lwz r7,GPR7(r1)
lwz r8,GPR8(r1)
1: mtctr r11
mtctr r11
mtlr r9
bctr /* jump to handler */
#else /* CONFIG_TRACE_IRQFLAGS */
mtspr SPRN_SRR0,r11
mtspr SPRN_SRR1,r10
mtlr r9
SYNC
RFI /* jump to handler, enable MMU */
#endif /* CONFIG_TRACE_IRQFLAGS */
#if defined (CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
@ -272,6 +288,7 @@ reenable_mmu: /* re-enable mmu so we can */
lwz r9,_MSR(r11) /* if sleeping, clear MSR.EE */
rlwinm r9,r9,0,~MSR_EE
lwz r12,_LINK(r11) /* and return to address in LR */
kuap_restore r11, r2, r3, r4, r5
b fast_exception_return
#endif
@ -301,6 +318,33 @@ stack_ovf:
SYNC
RFI
#ifdef CONFIG_TRACE_IRQFLAGS
trace_syscall_entry_irq_off:
/*
* Syscall shouldn't happen while interrupts are disabled,
* so let's do a warning here.
*/
0: trap
EMIT_BUG_ENTRY 0b,__FILE__,__LINE__, BUGFLAG_WARNING
bl trace_hardirqs_on
/* Now enable for real */
LOAD_MSR_KERNEL(r10, MSR_KERNEL | MSR_EE)
mtmsr r10
REST_GPR(0, r1)
REST_4GPRS(3, r1)
REST_2GPRS(7, r1)
b DoSyscall
#endif /* CONFIG_TRACE_IRQFLAGS */
.globl transfer_to_syscall
transfer_to_syscall:
#ifdef CONFIG_TRACE_IRQFLAGS
andi. r12,r9,MSR_EE
beq- trace_syscall_entry_irq_off
#endif /* CONFIG_TRACE_IRQFLAGS */
/*
* Handle a system call.
*/
@ -312,33 +356,14 @@ _GLOBAL(DoSyscall)
stw r3,ORIG_GPR3(r1)
li r12,0
stw r12,RESULT(r1)
lwz r11,_CCR(r1) /* Clear SO bit in CR */
rlwinm r11,r11,0,4,2
stw r11,_CCR(r1)
#ifdef CONFIG_TRACE_IRQFLAGS
/* Return from syscalls can (and generally will) hard enable
* interrupts. You aren't supposed to call a syscall with
* interrupts disabled in the first place. However, to ensure
* that we get it right vs. lockdep if it happens, we force
* that hard enable here with appropriate tracing if we see
* that we have been called with interrupts off
*/
/* Make sure interrupts are enabled */
mfmsr r11
andi. r12,r11,MSR_EE
bne+ 1f
/* We came in with interrupts disabled, we enable them now */
bl trace_hardirqs_on
mfmsr r11
lwz r0,GPR0(r1)
lwz r3,GPR3(r1)
lwz r4,GPR4(r1)
ori r11,r11,MSR_EE
lwz r5,GPR5(r1)
lwz r6,GPR6(r1)
lwz r7,GPR7(r1)
lwz r8,GPR8(r1)
mtmsr r11
1:
/* We came in with interrupts disabled, we WARN and mark them enabled
* for lockdep now */
0: tweqi r12, 0
EMIT_BUG_ENTRY 0b,__FILE__,__LINE__, BUGFLAG_WARNING
#endif /* CONFIG_TRACE_IRQFLAGS */
lwz r11,TI_FLAGS(r2)
andi. r11,r11,_TIF_SYSCALL_DOTRACE
@ -392,8 +417,7 @@ syscall_exit_cont:
lwz r8,_MSR(r1)
#ifdef CONFIG_TRACE_IRQFLAGS
/* If we are going to return from the syscall with interrupts
* off, we trace that here. It shouldn't happen though but we
* want to catch the bugger if it does right ?
* off, we trace that here. It shouldn't normally happen.
*/
andi. r10,r8,MSR_EE
bne+ 1f
@ -422,12 +446,11 @@ BEGIN_FTR_SECTION
lwarx r7,0,r1
END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
stwcx. r0,0,r1 /* to clear the reservation */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
andi. r4,r8,MSR_PR
beq 3f
ACCOUNT_CPU_USER_EXIT(r2, r5, r7)
3:
#ifdef CONFIG_PPC_BOOK3S_32
kuep_unlock r5, r7
#endif
kuap_check r2, r4
lwz r4,_LINK(r1)
lwz r5,_CCR(r1)
mtlr r4
@ -678,6 +701,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_SPE)
stw r10,_CCR(r1)
stw r1,KSP(r3) /* Set old stack pointer */
kuap_check r2, r4
#ifdef CONFIG_SMP
/* We need a sync somewhere here to make sure that if the
* previous task gets rescheduled on another CPU, it sees all
@ -820,6 +844,9 @@ restore_user:
bnel- load_dbcr0
#endif
ACCOUNT_CPU_USER_EXIT(r2, r10, r11)
#ifdef CONFIG_PPC_BOOK3S_32
kuep_unlock r10, r11
#endif
b restore
@ -866,12 +893,12 @@ resume_kernel:
/* check current_thread_info->preempt_count */
lwz r0,TI_PREEMPT(r2)
cmpwi 0,r0,0 /* if non-zero, just restore regs and return */
bne restore
bne restore_kuap
andi. r8,r8,_TIF_NEED_RESCHED
beq+ restore
beq+ restore_kuap
lwz r3,_MSR(r1)
andi. r0,r3,MSR_EE /* interrupts off? */
beq restore /* don't schedule if so */
beq restore_kuap /* don't schedule if so */
#ifdef CONFIG_TRACE_IRQFLAGS
/* Lockdep thinks irqs are enabled, we need to call
* preempt_schedule_irq with IRQs off, so we inform lockdep
@ -879,10 +906,7 @@ resume_kernel:
*/
bl trace_hardirqs_off
#endif
1: bl preempt_schedule_irq
lwz r3,TI_FLAGS(r2)
andi. r0,r3,_TIF_NEED_RESCHED
bne- 1b
bl preempt_schedule_irq
#ifdef CONFIG_TRACE_IRQFLAGS
/* And now, to properly rebalance the above, we tell lockdep they
* are being turned back on, which will happen when we return
@ -890,6 +914,8 @@ resume_kernel:
bl trace_hardirqs_on
#endif
#endif /* CONFIG_PREEMPT */
restore_kuap:
kuap_restore r1, r2, r9, r10, r0
/* interrupts are hard-disabled at this point */
restore:
@ -913,28 +939,14 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_47x)
* off in this assembly code while peeking at TI_FLAGS() and such. However
* we need to inform it if the exception turned interrupts off, and we
* are about to trun them back on.
*
* The problem here sadly is that we don't know whether the exceptions was
* one that turned interrupts off or not. So we always tell lockdep about
* turning them on here when we go back to wherever we came from with EE
* on, even if that may meen some redudant calls being tracked. Maybe later
* we could encode what the exception did somewhere or test the exception
* type in the pt_regs but that sounds overkill
*/
andi. r10,r9,MSR_EE
beq 1f
/*
* Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
* which is the stack frame here, we need to force a stack frame
* in case we came from user space.
*/
stwu r1,-32(r1)
mflr r0
stw r0,4(r1)
stwu r1,-32(r1)
bl trace_hardirqs_on
lwz r1,0(r1)
lwz r1,0(r1)
addi r1, r1, 32
lwz r9,_MSR(r1)
1:
#endif /* CONFIG_TRACE_IRQFLAGS */
@ -1197,6 +1209,7 @@ load_dbcr0:
.section .bss
.align 4
.global global_dbcr0
global_dbcr0:
.space 8*NR_CPUS
.previous
@ -1207,9 +1220,10 @@ do_work: /* r10 contains MSR_KERNEL here */
beq do_user_signal
do_resched: /* r10 contains MSR_KERNEL here */
/* Note: We don't need to inform lockdep that we are enabling
* interrupts here. As far as it knows, they are already enabled
*/
#ifdef CONFIG_TRACE_IRQFLAGS
bl trace_hardirqs_on
mfmsr r10
#endif
ori r10,r10,MSR_EE
SYNC
MTMSRD(r10) /* hard-enable interrupts */

35
arch/powerpc/kernel/entry_64.S
View File

@ -46,6 +46,7 @@
#include <asm/exception-64e.h>
#endif
#include <asm/feature-fixups.h>
#include <asm/kup.h>
/*
* System calls.
@ -120,6 +121,9 @@ END_BTB_FLUSH_SECTION
addi r9,r1,STACK_FRAME_OVERHEAD
ld r11,exception_marker@toc(r2)
std r11,-16(r9) /* "regshere" marker */
kuap_check_amr r10, r11
#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC_SPLPAR)
BEGIN_FW_FTR_SECTION
beq 33f
@ -275,6 +279,8 @@ END_FTR_SECTION_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
andi. r6,r8,MSR_PR
ld r4,_LINK(r1)
kuap_check_amr r10, r11
#ifdef CONFIG_PPC_BOOK3S
/*
* Clear MSR_RI, MSR_EE is already and remains disabled. We could do
@ -296,6 +302,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
std r8, PACATMSCRATCH(r13)
#endif
/*
* We don't need to restore AMR on the way back to userspace for KUAP.
* The value of AMR only matters while we're in the kernel.
*/
ld r13,GPR13(r1) /* only restore r13 if returning to usermode */
ld r2,GPR2(r1)
ld r1,GPR1(r1)
@ -306,8 +316,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
RFI_TO_USER
b . /* prevent speculative execution */
/* exit to kernel */
1: ld r2,GPR2(r1)
1: /* exit to kernel */
kuap_restore_amr r2
ld r2,GPR2(r1)
ld r1,GPR1(r1)
mtlr r4
mtcr r5
@ -594,6 +606,8 @@ _GLOBAL(_switch)
std r23,_CCR(r1)
std r1,KSP(r3) /* Set old stack pointer */
kuap_check_amr r9, r10
FLUSH_COUNT_CACHE
/*
@ -851,13 +865,7 @@ resume_kernel:
* sure we are soft-disabled first and reconcile irq state.
*/
RECONCILE_IRQ_STATE(r3,r4)
1: bl preempt_schedule_irq
/* Re-test flags and eventually loop */
ld r9, PACA_THREAD_INFO(r13)
ld r4,TI_FLAGS(r9)
andi. r0,r4,_TIF_NEED_RESCHED
bne 1b
bl preempt_schedule_irq
/*
* arch_local_irq_restore() from preempt_schedule_irq above may
@ -942,6 +950,8 @@ fast_exception_return:
ld r4,_XER(r1)
mtspr SPRN_XER,r4
kuap_check_amr r5, r6
REST_8GPRS(5, r1)
andi. r0,r3,MSR_RI
@ -974,6 +984,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
ACCOUNT_CPU_USER_EXIT(r13, r2, r4)
REST_GPR(13, r1)
/*
* We don't need to restore AMR on the way back to userspace for KUAP.
* The value of AMR only matters while we're in the kernel.
*/
mtspr SPRN_SRR1,r3
ld r2,_CCR(r1)
@ -1006,6 +1020,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
ld r0,GPR0(r1)
ld r2,GPR2(r1)
ld r3,GPR3(r1)
kuap_restore_amr r4
ld r4,GPR4(r1)
ld r1,GPR1(r1)
RFI_TO_KERNEL

26
arch/powerpc/kernel/exceptions-64s.S
View File

@ -19,6 +19,7 @@
#include <asm/cpuidle.h>
#include <asm/head-64.h>
#include <asm/feature-fixups.h>
#include <asm/kup.h>
/*
* There are a few constraints to be concerned with.
@ -120,7 +121,9 @@ EXC_VIRT_NONE(0x4000, 0x100)
mfspr r10,SPRN_SRR1 ; \
rlwinm. r10,r10,47-31,30,31 ; \
beq- 1f ; \
cmpwi cr3,r10,2 ; \
cmpwi cr1,r10,2 ; \
mfspr r3,SPRN_SRR1 ; \
bltlr cr1 ; /* no state loss, return to idle caller */ \
BRANCH_TO_C000(r10, system_reset_idle_common) ; \
1: \
KVMTEST_PR(n) ; \
@ -144,8 +147,11 @@ TRAMP_KVM(PACA_EXNMI, 0x100)
#ifdef CONFIG_PPC_P7_NAP
EXC_COMMON_BEGIN(system_reset_idle_common)
mfspr r12,SPRN_SRR1
b pnv_powersave_wakeup
/*
* This must be a direct branch (without linker branch stub) because
* we can not use TOC at this point as r2 may not be restored yet.
*/
b idle_return_gpr_loss
#endif
/*
@ -309,6 +315,7 @@ TRAMP_REAL_BEGIN(machine_check_common_early)
mfspr r11,SPRN_DSISR /* Save DSISR */
std r11,_DSISR(r1)
std r9,_CCR(r1) /* Save CR in stackframe */
kuap_save_amr_and_lock r9, r10, cr1
/* Save r9 through r13 from EXMC save area to stack frame. */
EXCEPTION_PROLOG_COMMON_2(PACA_EXMC)
mfmsr r11 /* get MSR value */
@ -427,17 +434,17 @@ EXC_COMMON_BEGIN(machine_check_idle_common)
* Then decrement MCE nesting after finishing with the stack.
*/
ld r3,_MSR(r1)
ld r4,_LINK(r1)
lhz r11,PACA_IN_MCE(r13)
subi r11,r11,1
sth r11,PACA_IN_MCE(r13)
/* Turn off the RI bit because SRR1 is used by idle wakeup code. */
/* Recoverability could be improved by reducing the use of SRR1. */
li r11,0
mtmsrd r11,1
b pnv_powersave_wakeup_mce
mtlr r4
rlwinm r10,r3,47-31,30,31
cmpwi cr1,r10,2
bltlr cr1 /* no state loss, return to idle caller */
b idle_return_gpr_loss
#endif
/*
* Handle machine check early in real mode. We come here with
@ -1109,6 +1116,7 @@ TRAMP_REAL_BEGIN(hmi_exception_early)
mfspr r11,SPRN_HSRR0 /* Save HSRR0 */
mfspr r12,SPRN_HSRR1 /* Save HSRR1 */
EXCEPTION_PROLOG_COMMON_1()
/* We don't touch AMR here, we never go to virtual mode */
EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN)
EXCEPTION_PROLOG_COMMON_3(0xe60)
addi r3,r1,STACK_FRAME_OVERHEAD

1
arch/powerpc/kernel/fadump.c
View File

@ -36,6 +36,7 @@
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/cma.h>
#include <linux/hugetlb.h>
#include <asm/debugfs.h>
#include <asm/page.h>

1
arch/powerpc/kernel/fpu.S
View File

@ -63,6 +63,7 @@ _GLOBAL(load_fp_state)
REST_32FPVSRS(0, R4, R3)
blr
EXPORT_SYMBOL(load_fp_state)
_ASM_NOKPROBE_SYMBOL(load_fp_state); /* used by restore_math */
/*
* Store FP state into memory, including FPSCR

258
arch/powerpc/kernel/head_32.S
View File

@ -37,6 +37,8 @@
#include <asm/export.h>
#include <asm/feature-fixups.h>
#include "head_32.h"
/* 601 only have IBAT; cr0.eq is set on 601 when using this macro */
#define LOAD_BAT(n, reg, RA, RB) \
/* see the comment for clear_bats() -- Cort */ \
@ -160,6 +162,10 @@ __after_mmu_off:
bl flush_tlbs
bl initial_bats
bl load_segment_registers
#ifdef CONFIG_KASAN
bl early_hash_table
#endif
#if defined(CONFIG_BOOTX_TEXT)
bl setup_disp_bat
#endif
@ -205,7 +211,7 @@ __after_mmu_off:
*/
turn_on_mmu:
mfmsr r0
ori r0,r0,MSR_DR|MSR_IR
ori r0,r0,MSR_DR|MSR_IR|MSR_RI
mtspr SPRN_SRR1,r0
lis r0,start_here@h
ori r0,r0,start_here@l
@ -242,103 +248,6 @@ __secondary_hold_spinloop:
__secondary_hold_acknowledge:
.long -1
/*
* Exception entry code. This code runs with address translation
* turned off, i.e. using physical addresses.
* We assume sprg3 has the physical address of the current
* task's thread_struct.
*/
#define EXCEPTION_PROLOG \
mtspr SPRN_SPRG_SCRATCH0,r10; \
mtspr SPRN_SPRG_SCRATCH1,r11; \
mfcr r10; \
EXCEPTION_PROLOG_1; \
EXCEPTION_PROLOG_2
#define EXCEPTION_PROLOG_1 \
mfspr r11,SPRN_SRR1; /* check whether user or kernel */ \
andi. r11,r11,MSR_PR; \
tophys(r11,r1); /* use tophys(r1) if kernel */ \
beq 1f; \
mfspr r11,SPRN_SPRG_THREAD; \
lwz r11,TASK_STACK-THREAD(r11); \
addi r11,r11,THREAD_SIZE; \
tophys(r11,r11); \
1: subi r11,r11,INT_FRAME_SIZE /* alloc exc. frame */
#define EXCEPTION_PROLOG_2 \
stw r10,_CCR(r11); /* save registers */ \
stw r12,GPR12(r11); \
stw r9,GPR9(r11); \
mfspr r10,SPRN_SPRG_SCRATCH0; \
stw r10,GPR10(r11); \
mfspr r12,SPRN_SPRG_SCRATCH1; \
stw r12,GPR11(r11); \
mflr r10; \
stw r10,_LINK(r11); \
mfspr r12,SPRN_SRR0; \
mfspr r9,SPRN_SRR1; \
stw r1,GPR1(r11); \
stw r1,0(r11); \
tovirt(r1,r11); /* set new kernel sp */ \
li r10,MSR_KERNEL & ~(MSR_IR|MSR_DR); /* can take exceptions */ \
MTMSRD(r10); /* (except for mach check in rtas) */ \
stw r0,GPR0(r11); \
lis r10,STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */ \
addi r10,r10,STACK_FRAME_REGS_MARKER@l; \
stw r10,8(r11); \
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
/*
* Note: code which follows this uses cr0.eq (set if from kernel),
* r11, r12 (SRR0), and r9 (SRR1).
*
* Note2: once we have set r1 we are in a position to take exceptions
* again, and we could thus set MSR:RI at that point.
*/
/*
* Exception vectors.
*/
#define EXCEPTION(n, label, hdlr, xfer) \
. = n; \
DO_KVM n; \
label: \
EXCEPTION_PROLOG; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
xfer(n, hdlr)
#define EXC_XFER_TEMPLATE(n, hdlr, trap, copyee, tfer, ret) \
li r10,trap; \
stw r10,_TRAP(r11); \
li r10,MSR_KERNEL; \
copyee(r10, r9); \
bl tfer; \
i##n: \
.long hdlr; \
.long ret
#define COPY_EE(d, s) rlwimi d,s,0,16,16
#define NOCOPY(d, s)
#define EXC_XFER_STD(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n, NOCOPY, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n+1, NOCOPY, transfer_to_handler, \
ret_from_except)
#define EXC_XFER_EE(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n, COPY_EE, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_EE_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n+1, COPY_EE, transfer_to_handler, \
ret_from_except)
/* System reset */
/* core99 pmac starts the seconary here by changing the vector, and
putting it back to what it was (unknown_exception) when done. */
@ -387,7 +296,11 @@ DataAccess:
EXCEPTION_PROLOG
mfspr r10,SPRN_DSISR
stw r10,_DSISR(r11)
#ifdef CONFIG_PPC_KUAP
andis. r0,r10,(DSISR_BAD_FAULT_32S | DSISR_DABRMATCH | DSISR_PROTFAULT)@h
#else
andis. r0,r10,(DSISR_BAD_FAULT_32S|DSISR_DABRMATCH)@h
#endif
bne 1f /* if not, try to put a PTE */
mfspr r4,SPRN_DAR /* into the hash table */
rlwinm r3,r10,32-15,21,21 /* DSISR_STORE -> _PAGE_RW */
@ -428,7 +341,7 @@ Alignment:
mfspr r5,SPRN_DSISR
stw r5,_DSISR(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE(0x600, alignment_exception)
EXC_XFER_STD(0x600, alignment_exception)
/* Program check exception */
EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD)
@ -449,24 +362,23 @@ END_FTR_SECTION_IFSET(CPU_FTR_FPU_UNAVAILABLE)
bl load_up_fpu /* if from user, just load it up */
b fast_exception_return
1: addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE_LITE(0x800, kernel_fp_unavailable_exception)
EXC_XFER_LITE(0x800, kernel_fp_unavailable_exception)
/* Decrementer */
EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE)
EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_STD)
EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_STD)
/* System call */
. = 0xc00
DO_KVM 0xc00
SystemCall:
EXCEPTION_PROLOG
EXC_XFER_EE_LITE(0xc00, DoSyscall)
SYSCALL_ENTRY 0xc00
/* Single step - not used on 601 */
EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD)
EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_STD)
/*
* The Altivec unavailable trap is at 0x0f20. Foo.
@ -522,9 +434,9 @@ InstructionTLBMiss:
andc. r1,r1,r0 /* check access & ~permission */
bne- InstructionAddressInvalid /* return if access not permitted */
/* Convert linux-style PTE to low word of PPC-style PTE */
rlwimi r0,r0,32-1,30,30 /* _PAGE_USER -> PP msb */
ori r1, r1, 0xe05 /* clear out reserved bits */
andc r1, r0, r1 /* PP = user? 2 : 0 */
rlwimi r0,r0,32-2,31,31 /* _PAGE_USER -> PP lsb */
ori r1, r1, 0xe06 /* clear out reserved bits */
andc r1, r0, r1 /* PP = user? 1 : 0 */
BEGIN_FTR_SECTION
rlwinm r1,r1,0,~_PAGE_COHERENT /* clear M (coherence not required) */
END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
@ -590,11 +502,11 @@ DataLoadTLBMiss:
* we would need to update the pte atomically with lwarx/stwcx.
*/
/* Convert linux-style PTE to low word of PPC-style PTE */
rlwinm r1,r0,32-10,31,31 /* _PAGE_RW -> PP lsb */
rlwinm r1,r0,32-9,30,30 /* _PAGE_RW -> PP msb */
rlwimi r0,r0,32-1,30,30 /* _PAGE_USER -> PP msb */
rlwimi r0,r0,32-1,31,31 /* _PAGE_USER -> PP lsb */
ori r1,r1,0xe04 /* clear out reserved bits */
andc r1,r0,r1 /* PP = user? rw? 2: 3: 0 */
andc r1,r0,r1 /* PP = user? rw? 1: 3: 0 */
BEGIN_FTR_SECTION
rlwinm r1,r1,0,~_PAGE_COHERENT /* clear M (coherence not required) */
END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
@ -670,9 +582,9 @@ DataStoreTLBMiss:
* we would need to update the pte atomically with lwarx/stwcx.
*/
/* Convert linux-style PTE to low word of PPC-style PTE */
rlwimi r0,r0,32-1,30,30 /* _PAGE_USER -> PP msb */
li r1,0xe05 /* clear out reserved bits & PP lsb */
andc r1,r0,r1 /* PP = user? 2: 0 */
rlwimi r0,r0,32-2,31,31 /* _PAGE_USER -> PP lsb */
li r1,0xe06 /* clear out reserved bits & PP msb */
andc r1,r0,r1 /* PP = user? 1: 0 */
BEGIN_FTR_SECTION
rlwinm r1,r1,0,~_PAGE_COHERENT /* clear M (coherence not required) */
END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
@ -698,35 +610,35 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU)
#define altivec_assist_exception unknown_exception
#endif
EXCEPTION(0x1300, Trap_13, instruction_breakpoint_exception, EXC_XFER_EE)
EXCEPTION(0x1400, SMI, SMIException, EXC_XFER_EE)
EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1600, Trap_16, altivec_assist_exception, EXC_XFER_EE)
EXCEPTION(0x1300, Trap_13, instruction_breakpoint_exception, EXC_XFER_STD)
EXCEPTION(0x1400, SMI, SMIException, EXC_XFER_STD)
EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1600, Trap_16, altivec_assist_exception, EXC_XFER_STD)
EXCEPTION(0x1700, Trap_17, TAUException, EXC_XFER_STD)
EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1c00, Trap_1c, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2000, RunMode, RunModeException, EXC_XFER_EE)
EXCEPTION(0x2100, Trap_21, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2200, Trap_22, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2300, Trap_23, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2400, Trap_24, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2500, Trap_25, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2600, Trap_26, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2700, Trap_27, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2800, Trap_28, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2900, Trap_29, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2a00, Trap_2a, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2b00, Trap_2b, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2c00, Trap_2c, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2d00, Trap_2d, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2e00, Trap_2e, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x2f00, Trap_2f, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1c00, Trap_1c, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2000, RunMode, RunModeException, EXC_XFER_STD)
EXCEPTION(0x2100, Trap_21, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2200, Trap_22, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2300, Trap_23, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2400, Trap_24, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2500, Trap_25, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2600, Trap_26, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2700, Trap_27, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2800, Trap_28, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2900, Trap_29, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2a00, Trap_2a, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2b00, Trap_2b, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2c00, Trap_2c, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2d00, Trap_2d, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2e00, Trap_2e, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2f00, Trap_2f, unknown_exception, EXC_XFER_STD)
. = 0x3000
@ -738,7 +650,7 @@ AltiVecUnavailable:
b fast_exception_return
#endif /* CONFIG_ALTIVEC */
1: addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE_LITE(0xf20, altivec_unavailable_exception)
EXC_XFER_LITE(0xf20, altivec_unavailable_exception)
PerformanceMonitor:
EXCEPTION_PROLOG
@ -880,11 +792,24 @@ _ENTRY(__restore_cpu_setup)
blr
#endif /* !defined(CONFIG_PPC_BOOK3S_32) */
/*
* Load stuff into the MMU. Intended to be called with
* IR=0 and DR=0.
*/
#ifdef CONFIG_KASAN
early_hash_table:
sync /* Force all PTE updates to finish */
isync
tlbia /* Clear all TLB entries */
sync /* wait for tlbia/tlbie to finish */
TLBSYNC /* ... on all CPUs */
/* Load the SDR1 register (hash table base & size) */
lis r6, early_hash - PAGE_OFFSET@h
ori r6, r6, 3 /* 256kB table */
mtspr SPRN_SDR1, r6
blr
#endif
load_up_mmu:
sync /* Force all PTE updates to finish */
isync
@ -896,14 +821,6 @@ load_up_mmu:
tophys(r6,r6)
lwz r6,_SDR1@l(r6)
mtspr SPRN_SDR1,r6
li r0,16 /* load up segment register values */
mtctr r0 /* for context 0 */
lis r3,0x2000 /* Ku = 1, VSID = 0 */
li r4,0
3: mtsrin r3,r4
addi r3,r3,0x111 /* increment VSID */
addis r4,r4,0x1000 /* address of next segment */
bdnz 3b
/* Load the BAT registers with the values set up by MMU_init.
MMU_init takes care of whether we're on a 601 or not. */
@ -925,6 +842,32 @@ BEGIN_MMU_FTR_SECTION
END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
blr
load_segment_registers:
li r0, NUM_USER_SEGMENTS /* load up user segment register values */
mtctr r0 /* for context 0 */
li r3, 0 /* Kp = 0, Ks = 0, VSID = 0 */
#ifdef CONFIG_PPC_KUEP
oris r3, r3, SR_NX@h /* Set Nx */
#endif
#ifdef CONFIG_PPC_KUAP
oris r3, r3, SR_KS@h /* Set Ks */
#endif
li r4, 0
3: mtsrin r3, r4
addi r3, r3, 0x111 /* increment VSID */
addis r4, r4, 0x1000 /* address of next segment */
bdnz 3b
li r0, 16 - NUM_USER_SEGMENTS /* load up kernel segment registers */
mtctr r0 /* for context 0 */
rlwinm r3, r3, 0, ~SR_NX /* Nx = 0 */
rlwinm r3, r3, 0, ~SR_KS /* Ks = 0 */
oris r3, r3, SR_KP@h /* Kp = 1 */
3: mtsrin r3, r4
addi r3, r3, 0x111 /* increment VSID */
addis r4, r4, 0x1000 /* address of next segment */
bdnz 3b
blr
/*
* This is where the main kernel code starts.
*/
@ -950,11 +893,17 @@ start_here:
* Do early platform-specific initialization,
* and set up the MMU.
*/
#ifdef CONFIG_KASAN
bl kasan_early_init
#endif
li r3,0
mr r4,r31
bl machine_init
bl __save_cpu_setup
bl MMU_init
BEGIN_MMU_FTR_SECTION
bl MMU_init_hw_patch
END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
/*
* Go back to running unmapped so we can load up new values
@ -1006,7 +955,12 @@ _ENTRY(switch_mmu_context)
blt- 4f
mulli r3,r3,897 /* multiply context by skew factor */
rlwinm r3,r3,4,8,27 /* VSID = (context & 0xfffff) << 4 */
addis r3,r3,0x6000 /* Set Ks, Ku bits */
#ifdef CONFIG_PPC_KUEP
oris r3, r3, SR_NX@h /* Set Nx */
#endif
#ifdef CONFIG_PPC_KUAP
oris r3, r3, SR_KS@h /* Set Ks */
#endif
li r0,NUM_USER_SEGMENTS
mtctr r0

203
arch/powerpc/kernel/head_32.h Normal file
View File

@ -0,0 +1,203 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __HEAD_32_H__
#define __HEAD_32_H__
#include <asm/ptrace.h> /* for STACK_FRAME_REGS_MARKER */
/*
* MSR_KERNEL is > 0x8000 on 4xx/Book-E since it include MSR_CE.
*/
.macro __LOAD_MSR_KERNEL r, x
.if \x >= 0x8000
lis \r, (\x)@h
ori \r, \r, (\x)@l
.else
li \r, (\x)
.endif
.endm
#define LOAD_MSR_KERNEL(r, x) __LOAD_MSR_KERNEL r, x
/*
* Exception entry code. This code runs with address translation
* turned off, i.e. using physical addresses.
* We assume sprg3 has the physical address of the current
* task's thread_struct.
*/
.macro EXCEPTION_PROLOG
mtspr SPRN_SPRG_SCRATCH0,r10
mtspr SPRN_SPRG_SCRATCH1,r11
mfcr r10
EXCEPTION_PROLOG_1
EXCEPTION_PROLOG_2
.endm
.macro EXCEPTION_PROLOG_1
mfspr r11,SPRN_SRR1 /* check whether user or kernel */
andi. r11,r11,MSR_PR
tophys(r11,r1) /* use tophys(r1) if kernel */
beq 1f
mfspr r11,SPRN_SPRG_THREAD
lwz r11,TASK_STACK-THREAD(r11)
addi r11,r11,THREAD_SIZE
tophys(r11,r11)
1: subi r11,r11,INT_FRAME_SIZE /* alloc exc. frame */
.endm
.macro EXCEPTION_PROLOG_2
stw r10,_CCR(r11) /* save registers */
stw r12,GPR12(r11)
stw r9,GPR9(r11)
mfspr r10,SPRN_SPRG_SCRATCH0
stw r10,GPR10(r11)
mfspr r12,SPRN_SPRG_SCRATCH1
stw r12,GPR11(r11)
mflr r10
stw r10,_LINK(r11)
mfspr r12,SPRN_SRR0
mfspr r9,SPRN_SRR1
stw r1,GPR1(r11)
stw r1,0(r11)
tovirt(r1,r11) /* set new kernel sp */
#ifdef CONFIG_40x
rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
#else
li r10,MSR_KERNEL & ~(MSR_IR|MSR_DR) /* can take exceptions */
MTMSRD(r10) /* (except for mach check in rtas) */
#endif
stw r0,GPR0(r11)
lis r10,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */
addi r10,r10,STACK_FRAME_REGS_MARKER@l
stw r10,8(r11)
SAVE_4GPRS(3, r11)
SAVE_2GPRS(7, r11)
.endm
.macro SYSCALL_ENTRY trapno
mfspr r12,SPRN_SPRG_THREAD
mfcr r10
lwz r11,TASK_STACK-THREAD(r12)
mflr r9
addi r11,r11,THREAD_SIZE - INT_FRAME_SIZE
rlwinm r10,r10,0,4,2 /* Clear SO bit in CR */
tophys(r11,r11)
stw r10,_CCR(r11) /* save registers */
mfspr r10,SPRN_SRR0
stw r9,_LINK(r11)
mfspr r9,SPRN_SRR1
stw r1,GPR1(r11)
stw r1,0(r11)
tovirt(r1,r11) /* set new kernel sp */
stw r10,_NIP(r11)
#ifdef CONFIG_40x
rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
#else
LOAD_MSR_KERNEL(r10, MSR_KERNEL & ~(MSR_IR|MSR_DR)) /* can take exceptions */
MTMSRD(r10) /* (except for mach check in rtas) */
#endif
lis r10,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */
stw r2,GPR2(r11)
addi r10,r10,STACK_FRAME_REGS_MARKER@l
stw r9,_MSR(r11)
li r2, \trapno + 1
stw r10,8(r11)
stw r2,_TRAP(r11)
SAVE_GPR(0, r11)
SAVE_4GPRS(3, r11)
SAVE_2GPRS(7, r11)
addi r11,r1,STACK_FRAME_OVERHEAD
addi r2,r12,-THREAD
stw r11,PT_REGS(r12)
#if defined(CONFIG_40x)
/* Check to see if the dbcr0 register is set up to debug. Use the
internal debug mode bit to do this. */
lwz r12,THREAD_DBCR0(r12)
andis. r12,r12,DBCR0_IDM@h
#endif
ACCOUNT_CPU_USER_ENTRY(r2, r11, r12)
#if defined(CONFIG_40x)
beq+ 3f
/* From user and task is ptraced - load up global dbcr0 */
li r12,-1 /* clear all pending debug events */
mtspr SPRN_DBSR,r12
lis r11,global_dbcr0@ha
tophys(r11,r11)
addi r11,r11,global_dbcr0@l
lwz r12,0(r11)
mtspr SPRN_DBCR0,r12
lwz r12,4(r11)
addi r12,r12,-1
stw r12,4(r11)
#endif
3:
tovirt(r2, r2) /* set r2 to current */
lis r11, transfer_to_syscall@h
ori r11, r11, transfer_to_syscall@l
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* If MSR is changing we need to keep interrupts disabled at this point
* otherwise we might risk taking an interrupt before we tell lockdep
* they are enabled.
*/
LOAD_MSR_KERNEL(r10, MSR_KERNEL)
rlwimi r10, r9, 0, MSR_EE
#else
LOAD_MSR_KERNEL(r10, MSR_KERNEL | MSR_EE)
#endif
#if defined(CONFIG_PPC_8xx) && defined(CONFIG_PERF_EVENTS)
mtspr SPRN_NRI, r0
#endif
mtspr SPRN_SRR1,r10
mtspr SPRN_SRR0,r11
SYNC
RFI /* jump to handler, enable MMU */
.endm
/*
* Note: code which follows this uses cr0.eq (set if from kernel),
* r11, r12 (SRR0), and r9 (SRR1).
*
* Note2: once we have set r1 we are in a position to take exceptions
* again, and we could thus set MSR:RI at that point.
*/
/*
* Exception vectors.
*/
#ifdef CONFIG_PPC_BOOK3S
#define START_EXCEPTION(n, label) \
. = n; \
DO_KVM n; \
label:
#else
#define START_EXCEPTION(n, label) \
. = n; \
label:
#endif
#define EXCEPTION(n, label, hdlr, xfer) \
START_EXCEPTION(n, label) \
EXCEPTION_PROLOG; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
xfer(n, hdlr)
#define EXC_XFER_TEMPLATE(hdlr, trap, msr, tfer, ret) \
li r10,trap; \
stw r10,_TRAP(r11); \
LOAD_MSR_KERNEL(r10, msr); \
bl tfer; \
.long hdlr; \
.long ret
#define EXC_XFER_STD(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, transfer_to_handler, \
ret_from_except)
#endif /* __HEAD_32_H__ */

155
arch/powerpc/kernel/head_40x.S
View File

@ -44,6 +44,8 @@
#include <asm/export.h>
#include <asm/asm-405.h>
#include "head_32.h"
/* As with the other PowerPC ports, it is expected that when code
* execution begins here, the following registers contain valid, yet
* optional, information:
@ -98,46 +100,6 @@ _ENTRY(crit_srr1)
_ENTRY(saved_ksp_limit)
.space 4
/*
* Exception vector entry code. This code runs with address translation
* turned off (i.e. using physical addresses). We assume SPRG_THREAD has
* the physical address of the current task thread_struct.
* Note that we have to have decremented r1 before we write to any fields
* of the exception frame, since a critical interrupt could occur at any
* time, and it will write to the area immediately below the current r1.
*/
#define NORMAL_EXCEPTION_PROLOG \
mtspr SPRN_SPRG_SCRATCH0,r10; /* save two registers to work with */\
mtspr SPRN_SPRG_SCRATCH1,r11; \
mtspr SPRN_SPRG_SCRATCH2,r1; \
mfcr r10; /* save CR in r10 for now */\
mfspr r11,SPRN_SRR1; /* check whether user or kernel */\
andi. r11,r11,MSR_PR; \
beq 1f; \
mfspr r1,SPRN_SPRG_THREAD; /* if from user, start at top of */\
lwz r1,TASK_STACK-THREAD(r1); /* this thread's kernel stack */\
addi r1,r1,THREAD_SIZE; \
1: subi r1,r1,INT_FRAME_SIZE; /* Allocate an exception frame */\
tophys(r11,r1); \
stw r10,_CCR(r11); /* save various registers */\
stw r12,GPR12(r11); \
stw r9,GPR9(r11); \
mfspr r10,SPRN_SPRG_SCRATCH0; \
stw r10,GPR10(r11); \
mfspr r12,SPRN_SPRG_SCRATCH1; \
stw r12,GPR11(r11); \
mflr r10; \
stw r10,_LINK(r11); \
mfspr r10,SPRN_SPRG_SCRATCH2; \
mfspr r12,SPRN_SRR0; \
stw r10,GPR1(r11); \
mfspr r9,SPRN_SRR1; \
stw r10,0(r11); \
rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\
stw r0,GPR0(r11); \
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
/*
* Exception prolog for critical exceptions. This is a little different
* from the normal exception prolog above since a critical exception
@ -177,6 +139,9 @@ _ENTRY(saved_ksp_limit)
tovirt(r1,r11); \
rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\
stw r0,GPR0(r11); \
lis r10, STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */\
addi r10, r10, STACK_FRAME_REGS_MARKER@l; \
stw r10, 8(r11); \
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
@ -196,53 +161,12 @@ _ENTRY(saved_ksp_limit)
/*
* Exception vectors.
*/
#define START_EXCEPTION(n, label) \
. = n; \
label:
#define EXCEPTION(n, label, hdlr, xfer) \
START_EXCEPTION(n, label); \
NORMAL_EXCEPTION_PROLOG; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
xfer(n, hdlr)
#define CRITICAL_EXCEPTION(n, label, hdlr) \
START_EXCEPTION(n, label); \
CRITICAL_EXCEPTION_PROLOG; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(hdlr, n+2, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
NOCOPY, crit_transfer_to_handler, \
ret_from_crit_exc)
#define EXC_XFER_TEMPLATE(hdlr, trap, msr, copyee, tfer, ret) \
li r10,trap; \
stw r10,_TRAP(r11); \
lis r10,msr@h; \
ori r10,r10,msr@l; \
copyee(r10, r9); \
bl tfer; \
.long hdlr; \
.long ret
#define COPY_EE(d, s) rlwimi d,s,0,16,16
#define NOCOPY(d, s)
#define EXC_XFER_STD(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, NOCOPY, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, NOCOPY, transfer_to_handler, \
ret_from_except)
#define EXC_XFER_EE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, COPY_EE, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_EE_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, COPY_EE, transfer_to_handler, \
ret_from_except)
crit_transfer_to_handler, ret_from_crit_exc)
/*
* 0x0100 - Critical Interrupt Exception
@ -393,7 +317,7 @@ label:
* This is caused by a fetch from non-execute or guarded pages.
*/
START_EXCEPTION(0x0400, InstructionAccess)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mr r4,r12 /* Pass SRR0 as arg2 */
li r5,0 /* Pass zero as arg3 */
EXC_XFER_LITE(0x400, handle_page_fault)
@ -403,33 +327,32 @@ label:
/* 0x0600 - Alignment Exception */
START_EXCEPTION(0x0600, Alignment)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mfspr r4,SPRN_DEAR /* Grab the DEAR and save it */
stw r4,_DEAR(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE(0x600, alignment_exception)
EXC_XFER_STD(0x600, alignment_exception)
/* 0x0700 - Program Exception */
START_EXCEPTION(0x0700, ProgramCheck)
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mfspr r4,SPRN_ESR /* Grab the ESR and save it */
stw r4,_ESR(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_STD(0x700, program_check_exception)
EXCEPTION(0x0800, Trap_08, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0900, Trap_09, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0A00, Trap_0A, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0B00, Trap_0B, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0800, Trap_08, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x0900, Trap_09, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x0A00, Trap_0A, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x0B00, Trap_0B, unknown_exception, EXC_XFER_STD)
/* 0x0C00 - System Call Exception */
START_EXCEPTION(0x0C00, SystemCall)
NORMAL_EXCEPTION_PROLOG
EXC_XFER_EE_LITE(0xc00, DoSyscall)
SYSCALL_ENTRY 0xc00
EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0E00, Trap_0E, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x0D00, Trap_0D, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x0E00, Trap_0E, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x0F00, Trap_0F, unknown_exception, EXC_XFER_STD)
/* 0x1000 - Programmable Interval Timer (PIT) Exception */
. = 0x1000
@ -646,25 +569,25 @@ label:
mfspr r10, SPRN_SPRG_SCRATCH0
b InstructionAccess
EXCEPTION(0x1300, Trap_13, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1400, Trap_14, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1300, Trap_13, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1400, Trap_14, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_STD)
#ifdef CONFIG_IBM405_ERR51
/* 405GP errata 51 */
START_EXCEPTION(0x1700, Trap_17)
b DTLBMiss
#else
EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_STD)
#endif
EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1A00, Trap_1A, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1B00, Trap_1B, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1C00, Trap_1C, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1D00, Trap_1D, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1E00, Trap_1E, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1F00, Trap_1F, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1A00, Trap_1A, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1B00, Trap_1B, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1C00, Trap_1C, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1D00, Trap_1D, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1E00, Trap_1E, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1F00, Trap_1F, unknown_exception, EXC_XFER_STD)
/* Check for a single step debug exception while in an exception
* handler before state has been saved. This is to catch the case
@ -726,11 +649,11 @@ label:
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_TEMPLATE(DebugException, 0x2002, \
(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
crit_transfer_to_handler, ret_from_crit_exc)
/* Programmable Interval Timer (PIT) Exception. (from 0x1000) */
Decrementer:
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
lis r0,TSR_PIS@h
mtspr SPRN_TSR,r0 /* Clear the PIT exception */
addi r3,r1,STACK_FRAME_OVERHEAD
@ -738,9 +661,9 @@ Decrementer:
/* Fixed Interval Timer (FIT) Exception. (from 0x1010) */
FITException:
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
addi r3,r1,STACK_FRAME_OVERHEAD;
EXC_XFER_EE(0x1010, unknown_exception)
EXC_XFER_STD(0x1010, unknown_exception)
/* Watchdog Timer (WDT) Exception. (from 0x1020) */
WDTException:
@ -748,15 +671,14 @@ WDTException:
addi r3,r1,STACK_FRAME_OVERHEAD;
EXC_XFER_TEMPLATE(WatchdogException, 0x1020+2,
(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)),
NOCOPY, crit_transfer_to_handler,
ret_from_crit_exc)
crit_transfer_to_handler, ret_from_crit_exc)
/*
* The other Data TLB exceptions bail out to this point
* if they can't resolve the lightweight TLB fault.
*/
DataAccess:
NORMAL_EXCEPTION_PROLOG
EXCEPTION_PROLOG
mfspr r5,SPRN_ESR /* Grab the ESR, save it, pass arg3 */
stw r5,_ESR(r11)
mfspr r4,SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */
@ -848,6 +770,9 @@ start_here:
/*
* Decide what sort of machine this is and initialize the MMU.
*/
#ifdef CONFIG_KASAN
bl kasan_early_init
#endif
li r3,0
mr r4,r31
bl machine_init

12
arch/powerpc/kernel/head_44x.S
View File

@ -203,6 +203,9 @@ _ENTRY(_start);
/*
* Decide what sort of machine this is and initialize the MMU.
*/
#ifdef CONFIG_KASAN
bl kasan_early_init
#endif
li r3,0
mr r4,r31
bl machine_init
@ -278,16 +281,15 @@ interrupt_base:
FP_UNAVAILABLE_EXCEPTION
#else
EXCEPTION(0x2010, BOOKE_INTERRUPT_FP_UNAVAIL, \
FloatingPointUnavailable, unknown_exception, EXC_XFER_EE)
FloatingPointUnavailable, unknown_exception, EXC_XFER_STD)
#endif
/* System Call Interrupt */
START_EXCEPTION(SystemCall)
NORMAL_EXCEPTION_PROLOG(BOOKE_INTERRUPT_SYSCALL)
EXC_XFER_EE_LITE(0x0c00, DoSyscall)
SYSCALL_ENTRY 0xc00 BOOKE_INTERRUPT_SYSCALL
/* Auxiliary Processor Unavailable Interrupt */
EXCEPTION(0x2020, BOOKE_INTERRUPT_AP_UNAVAIL, \
AuxillaryProcessorUnavailable, unknown_exception, EXC_XFER_EE)
AuxillaryProcessorUnavailable, unknown_exception, EXC_XFER_STD)
/* Decrementer Interrupt */
DECREMENTER_EXCEPTION
@ -295,7 +297,7 @@ interrupt_base:
/* Fixed Internal Timer Interrupt */
/* TODO: Add FIT support */
EXCEPTION(0x1010, BOOKE_INTERRUPT_FIT, FixedIntervalTimer, \
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
/* Watchdog Timer Interrupt */
/* TODO: Add watchdog support */

4
arch/powerpc/kernel/head_64.S
View File

@ -968,7 +968,9 @@ start_here_multiplatform:
/* Restore parameters passed from prom_init/kexec */
mr r3,r31
bl early_setup /* also sets r13 and SPRG_PACA */
LOAD_REG_ADDR(r12, DOTSYM(early_setup))
mtctr r12
bctrl /* also sets r13 and SPRG_PACA */
LOAD_REG_ADDR(r3, start_here_common)
ld r4,PACAKMSR(r13)

136
arch/powerpc/kernel/head_8xx.S
View File

@ -33,6 +33,8 @@
#include <asm/export.h>
#include <asm/code-patching-asm.h>
#include "head_32.h"
#if CONFIG_TASK_SIZE <= 0x80000000 && CONFIG_PAGE_OFFSET >= 0x80000000
/* By simply checking Address >= 0x80000000, we know if its a kernel address */
#define SIMPLE_KERNEL_ADDRESS 1
@ -123,102 +125,6 @@ instruction_counter:
.space 4
#endif
/*
* Exception entry code. This code runs with address translation
* turned off, i.e. using physical addresses.
* We assume sprg3 has the physical address of the current
* task's thread_struct.
*/
#define EXCEPTION_PROLOG \
mtspr SPRN_SPRG_SCRATCH0, r10; \
mtspr SPRN_SPRG_SCRATCH1, r11; \
mfcr r10; \
EXCEPTION_PROLOG_1; \
EXCEPTION_PROLOG_2
#define EXCEPTION_PROLOG_1 \
mfspr r11,SPRN_SRR1; /* check whether user or kernel */ \
andi. r11,r11,MSR_PR; \
tophys(r11,r1); /* use tophys(r1) if kernel */ \
beq 1f; \
mfspr r11,SPRN_SPRG_THREAD; \
lwz r11,TASK_STACK-THREAD(r11); \
addi r11,r11,THREAD_SIZE; \
tophys(r11,r11); \
1: subi r11,r11,INT_FRAME_SIZE /* alloc exc. frame */
#define EXCEPTION_PROLOG_2 \
stw r10,_CCR(r11); /* save registers */ \
stw r12,GPR12(r11); \
stw r9,GPR9(r11); \
mfspr r10,SPRN_SPRG_SCRATCH0; \
stw r10,GPR10(r11); \
mfspr r12,SPRN_SPRG_SCRATCH1; \
stw r12,GPR11(r11); \
mflr r10; \
stw r10,_LINK(r11); \
mfspr r12,SPRN_SRR0; \
mfspr r9,SPRN_SRR1; \
stw r1,GPR1(r11); \
stw r1,0(r11); \
tovirt(r1,r11); /* set new kernel sp */ \
li r10,MSR_KERNEL & ~(MSR_IR|MSR_DR); /* can take exceptions */ \
mtmsr r10; \
stw r0,GPR0(r11); \
lis r10, STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */ \
addi r10, r10, STACK_FRAME_REGS_MARKER@l; \
stw r10, 8(r11); \
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
/*
* Note: code which follows this uses cr0.eq (set if from kernel),
* r11, r12 (SRR0), and r9 (SRR1).
*
* Note2: once we have set r1 we are in a position to take exceptions
* again, and we could thus set MSR:RI at that point.
*/
/*
* Exception vectors.
*/
#define EXCEPTION(n, label, hdlr, xfer) \
. = n; \
label: \
EXCEPTION_PROLOG; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
xfer(n, hdlr)
#define EXC_XFER_TEMPLATE(n, hdlr, trap, copyee, tfer, ret) \
li r10,trap; \
stw r10,_TRAP(r11); \
li r10,MSR_KERNEL; \
copyee(r10, r9); \
bl tfer; \
i##n: \
.long hdlr; \
.long ret
#define COPY_EE(d, s) rlwimi d,s,0,16,16
#define NOCOPY(d, s)
#define EXC_XFER_STD(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n, NOCOPY, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n+1, NOCOPY, transfer_to_handler, \
ret_from_except)
#define EXC_XFER_EE(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n, COPY_EE, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_EE_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(n, hdlr, n+1, COPY_EE, transfer_to_handler, \
ret_from_except)
/* System reset */
EXCEPTION(0x100, Reset, system_reset_exception, EXC_XFER_STD)
@ -261,7 +167,7 @@ Alignment:
mfspr r5,SPRN_DSISR
stw r5,_DSISR(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE(0x600, alignment_exception)
EXC_XFER_STD(0x600, alignment_exception)
/* Program check exception */
EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD)
@ -273,19 +179,18 @@ Alignment:
/* Decrementer */
EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE)
EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_STD)
EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_STD)
/* System call */
. = 0xc00
SystemCall:
EXCEPTION_PROLOG
EXC_XFER_EE_LITE(0xc00, DoSyscall)
SYSCALL_ENTRY 0xc00
/* Single step - not used on 601 */
EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD)
EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xf00, Trap_0f, unknown_exception, EXC_XFER_EE)
EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_STD)
EXCEPTION(0xf00, Trap_0f, unknown_exception, EXC_XFER_STD)
/* On the MPC8xx, this is a software emulation interrupt. It occurs
* for all unimplemented and illegal instructions.
@ -615,13 +520,13 @@ DARFixed:/* Return from dcbx instruction bug workaround */
/* 0x300 is DataAccess exception, needed by bad_page_fault() */
EXC_XFER_LITE(0x300, handle_page_fault)
EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_STD)
/* On the MPC8xx, these next four traps are used for development
* support of breakpoints and such. Someday I will get around to
@ -643,7 +548,7 @@ DataBreakpoint:
mfspr r4,SPRN_BAR
stw r4,_DAR(r11)
mfspr r5,SPRN_DSISR
EXC_XFER_EE(0x1c00, do_break)
EXC_XFER_STD(0x1c00, do_break)
11:
mtcr r10
mfspr r10, SPRN_SPRG_SCRATCH0
@ -663,10 +568,10 @@ InstructionBreakpoint:
mfspr r10, SPRN_SPRG_SCRATCH0
rfi
#else
EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_STD)
#endif
EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_EE)
EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_STD)
EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_STD)
. = 0x2000
@ -853,6 +758,9 @@ start_here:
/*
* Decide what sort of machine this is and initialize the MMU.
*/
#ifdef CONFIG_KASAN
bl kasan_early_init
#endif
li r3,0
mr r4,r31
bl machine_init

131
arch/powerpc/kernel/head_booke.h
View File

@ -6,6 +6,8 @@
#include <asm/kvm_asm.h>
#include <asm/kvm_booke_hv_asm.h>
#ifdef __ASSEMBLY__
/*
* Macros used for common Book-e exception handling
*/
@ -81,6 +83,101 @@ END_BTB_FLUSH_SECTION
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
.macro SYSCALL_ENTRY trapno intno
mfspr r10, SPRN_SPRG_THREAD
#ifdef CONFIG_KVM_BOOKE_HV
BEGIN_FTR_SECTION
mtspr SPRN_SPRG_WSCRATCH0, r10
stw r11, THREAD_NORMSAVE(0)(r10)
stw r13, THREAD_NORMSAVE(2)(r10)
mfcr r13 /* save CR in r13 for now */
mfspr r11, SPRN_SRR1
mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
bf 3, 1975f
b kvmppc_handler_BOOKE_INTERRUPT_\intno\()_SPRN_SRR1
1975:
mr r12, r13
lwz r13, THREAD_NORMSAVE(2)(r10)
FTR_SECTION_ELSE
#endif
mfcr r12
#ifdef CONFIG_KVM_BOOKE_HV
ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
#endif
BOOKE_CLEAR_BTB(r11)
lwz r11, TASK_STACK - THREAD(r10)
rlwinm r12,r12,0,4,2 /* Clear SO bit in CR */
ALLOC_STACK_FRAME(r11, THREAD_SIZE - INT_FRAME_SIZE)
stw r12, _CCR(r11) /* save various registers */
mflr r12
stw r12,_LINK(r11)
mfspr r12,SPRN_SRR0
stw r1, GPR1(r11)
mfspr r9,SPRN_SRR1
stw r1, 0(r11)
mr r1, r11
stw r12,_NIP(r11)
rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
lis r12, STACK_FRAME_REGS_MARKER@ha /* exception frame marker */
stw r2,GPR2(r11)
addi r12, r12, STACK_FRAME_REGS_MARKER@l
stw r9,_MSR(r11)
li r2, \trapno + 1
stw r12, 8(r11)
stw r2,_TRAP(r11)
SAVE_GPR(0, r11)
SAVE_4GPRS(3, r11)
SAVE_2GPRS(7, r11)
addi r11,r1,STACK_FRAME_OVERHEAD
addi r2,r10,-THREAD
stw r11,PT_REGS(r10)
/* Check to see if the dbcr0 register is set up to debug. Use the
internal debug mode bit to do this. */
lwz r12,THREAD_DBCR0(r10)
andis. r12,r12,DBCR0_IDM@h
ACCOUNT_CPU_USER_ENTRY(r2, r11, r12)
beq+ 3f
/* From user and task is ptraced - load up global dbcr0 */
li r12,-1 /* clear all pending debug events */
mtspr SPRN_DBSR,r12
lis r11,global_dbcr0@ha
tophys(r11,r11)
addi r11,r11,global_dbcr0@l
#ifdef CONFIG_SMP
lwz r9,TASK_CPU(r2)
slwi r9,r9,3
add r11,r11,r9
#endif
lwz r12,0(r11)
mtspr SPRN_DBCR0,r12
lwz r12,4(r11)
addi r12,r12,-1
stw r12,4(r11)
3:
tovirt(r2, r2) /* set r2 to current */
lis r11, transfer_to_syscall@h
ori r11, r11, transfer_to_syscall@l
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* If MSR is changing we need to keep interrupts disabled at this point
* otherwise we might risk taking an interrupt before we tell lockdep
* they are enabled.
*/
lis r10, MSR_KERNEL@h
ori r10, r10, MSR_KERNEL@l
rlwimi r10, r9, 0, MSR_EE
#else
lis r10, (MSR_KERNEL | MSR_EE)@h
ori r10, r10, (MSR_KERNEL | MSR_EE)@l
#endif
mtspr SPRN_SRR1,r10
mtspr SPRN_SRR0,r11
SYNC
RFI /* jump to handler, enable MMU */
.endm
/* To handle the additional exception priority levels on 40x and Book-E
* processors we allocate a stack per additional priority level.
*
@ -217,8 +314,7 @@ label:
CRITICAL_EXCEPTION_PROLOG(intno); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(hdlr, n+2, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
NOCOPY, crit_transfer_to_handler, \
ret_from_crit_exc)
crit_transfer_to_handler, ret_from_crit_exc)
#define MCHECK_EXCEPTION(n, label, hdlr) \
START_EXCEPTION(label); \
@ -227,36 +323,23 @@ label:
stw r5,_ESR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(hdlr, n+4, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
NOCOPY, mcheck_transfer_to_handler, \
ret_from_mcheck_exc)
mcheck_transfer_to_handler, ret_from_mcheck_exc)
#define EXC_XFER_TEMPLATE(hdlr, trap, msr, copyee, tfer, ret) \
#define EXC_XFER_TEMPLATE(hdlr, trap, msr, tfer, ret) \
li r10,trap; \
stw r10,_TRAP(r11); \
lis r10,msr@h; \
ori r10,r10,msr@l; \
copyee(r10, r9); \
bl tfer; \
.long hdlr; \
.long ret
#define COPY_EE(d, s) rlwimi d,s,0,16,16
#define NOCOPY(d, s)
#define EXC_XFER_STD(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, NOCOPY, transfer_to_handler_full, \
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, NOCOPY, transfer_to_handler, \
ret_from_except)
#define EXC_XFER_EE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, COPY_EE, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_EE_LITE(n, hdlr) \
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, COPY_EE, transfer_to_handler, \
EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, transfer_to_handler, \
ret_from_except)
/* Check for a single step debug exception while in an exception
@ -323,7 +406,7 @@ label:
/* continue normal handling for a debug exception... */ \
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)
EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), debug_transfer_to_handler, ret_from_debug_exc)
#define DEBUG_CRIT_EXCEPTION \
START_EXCEPTION(DebugCrit); \
@ -376,7 +459,7 @@ label:
/* continue normal handling for a critical exception... */ \
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), crit_transfer_to_handler, ret_from_crit_exc)
#define DATA_STORAGE_EXCEPTION \
START_EXCEPTION(DataStorage) \
@ -401,7 +484,7 @@ label:
mfspr r4,SPRN_DEAR; /* Grab the DEAR and save it */ \
stw r4,_DEAR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_EE(0x0600, alignment_exception)
EXC_XFER_STD(0x0600, alignment_exception)
#define PROGRAM_EXCEPTION \
START_EXCEPTION(Program) \
@ -426,9 +509,9 @@ label:
bl load_up_fpu; /* if from user, just load it up */ \
b fast_exception_return; \
1: addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_EE_LITE(0x800, kernel_fp_unavailable_exception)
EXC_XFER_STD(0x800, kernel_fp_unavailable_exception)
#ifndef __ASSEMBLY__
#else /* __ASSEMBLY__ */
struct exception_regs {
unsigned long mas0;
unsigned long mas1;

32
arch/powerpc/kernel/head_fsl_booke.S
View File

@ -268,6 +268,9 @@ set_ivor:
/*
* Decide what sort of machine this is and initialize the MMU.
*/
#ifdef CONFIG_KASAN
bl kasan_early_init
#endif
mr r3,r30
mr r4,r31
bl machine_init
@ -380,7 +383,7 @@ interrupt_base:
EXC_XFER_LITE(0x0300, handle_page_fault)
1:
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE_LITE(0x0300, CacheLockingException)
EXC_XFER_LITE(0x0300, CacheLockingException)
/* Instruction Storage Interrupt */
INSTRUCTION_STORAGE_EXCEPTION
@ -401,21 +404,20 @@ interrupt_base:
#ifdef CONFIG_E200
/* E200 treats 'normal' floating point instructions as FP Unavail exception */
EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, \
program_check_exception, EXC_XFER_EE)
program_check_exception, EXC_XFER_STD)
#else
EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, \
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
#endif
#endif
/* System Call Interrupt */
START_EXCEPTION(SystemCall)
NORMAL_EXCEPTION_PROLOG(SYSCALL)
EXC_XFER_EE_LITE(0x0c00, DoSyscall)
SYSCALL_ENTRY 0xc00 SYSCALL
/* Auxiliary Processor Unavailable Interrupt */
EXCEPTION(0x2900, AP_UNAVAIL, AuxillaryProcessorUnavailable, \
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
/* Decrementer Interrupt */
DECREMENTER_EXCEPTION
@ -423,7 +425,7 @@ interrupt_base:
/* Fixed Internal Timer Interrupt */
/* TODO: Add FIT support */
EXCEPTION(0x3100, FIT, FixedIntervalTimer, \
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
/* Watchdog Timer Interrupt */
#ifdef CONFIG_BOOKE_WDT
@ -633,25 +635,25 @@ END_BTB_FLUSH_SECTION
bl load_up_spe
b fast_exception_return
1: addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_EE_LITE(0x2010, KernelSPE)
EXC_XFER_LITE(0x2010, KernelSPE)
#elif defined(CONFIG_SPE_POSSIBLE)
EXCEPTION(0x2020, SPE_UNAVAIL, SPEUnavailable, \
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
#endif /* CONFIG_SPE_POSSIBLE */
/* SPE Floating Point Data */
#ifdef CONFIG_SPE
EXCEPTION(0x2030, SPE_FP_DATA, SPEFloatingPointData,
SPEFloatingPointException, EXC_XFER_EE)
SPEFloatingPointException, EXC_XFER_STD)
/* SPE Floating Point Round */
EXCEPTION(0x2050, SPE_FP_ROUND, SPEFloatingPointRound, \
SPEFloatingPointRoundException, EXC_XFER_EE)
SPEFloatingPointRoundException, EXC_XFER_STD)
#elif defined(CONFIG_SPE_POSSIBLE)
EXCEPTION(0x2040, SPE_FP_DATA, SPEFloatingPointData,
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
EXCEPTION(0x2050, SPE_FP_ROUND, SPEFloatingPointRound, \
unknown_exception, EXC_XFER_EE)
unknown_exception, EXC_XFER_STD)
#endif /* CONFIG_SPE_POSSIBLE */
@ -674,10 +676,10 @@ END_BTB_FLUSH_SECTION
unknown_exception)
/* Hypercall */
EXCEPTION(0, HV_SYSCALL, Hypercall, unknown_exception, EXC_XFER_EE)
EXCEPTION(0, HV_SYSCALL, Hypercall, unknown_exception, EXC_XFER_STD)
/* Embedded Hypervisor Privilege */
EXCEPTION(0, HV_PRIV, Ehvpriv, unknown_exception, EXC_XFER_EE)
EXCEPTION(0, HV_PRIV, Ehvpriv, unknown_exception, EXC_XFER_STD)
interrupt_end:

62
arch/powerpc/kernel/hw_breakpoint.c
View File

@ -29,11 +29,15 @@
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/debugfs.h>
#include <linux/init.h>
#include <asm/hw_breakpoint.h>
#include <asm/processor.h>
#include <asm/sstep.h>
#include <asm/debug.h>
#include <asm/debugfs.h>
#include <asm/hvcall.h>
#include <linux/uaccess.h>
/*
@ -174,7 +178,7 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
if (!ppc_breakpoint_available())
return -ENODEV;
length_max = 8; /* DABR */
if (cpu_has_feature(CPU_FTR_DAWR)) {
if (dawr_enabled()) {
length_max = 512 ; /* 64 doublewords */
/* DAWR region can't cross 512 boundary */
if ((attr->bp_addr >> 9) !=
@ -376,3 +380,59 @@ void hw_breakpoint_pmu_read(struct perf_event *bp)
{
/* TODO */
}
bool dawr_force_enable;
EXPORT_SYMBOL_GPL(dawr_force_enable);
static ssize_t dawr_write_file_bool(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct arch_hw_breakpoint null_brk = {0, 0, 0};
size_t rc;
/* Send error to user if they hypervisor won't allow us to write DAWR */
if ((!dawr_force_enable) &&
(firmware_has_feature(FW_FEATURE_LPAR)) &&
(set_dawr(&null_brk) != H_SUCCESS))
return -1;
rc = debugfs_write_file_bool(file, user_buf, count, ppos);
if (rc)
return rc;
/* If we are clearing, make sure all CPUs have the DAWR cleared */
if (!dawr_force_enable)
smp_call_function((smp_call_func_t)set_dawr, &null_brk, 0);
return rc;
}
static const struct file_operations dawr_enable_fops = {
.read = debugfs_read_file_bool,
.write = dawr_write_file_bool,
.open = simple_open,
.llseek = default_llseek,
};
static int __init dawr_force_setup(void)
{
dawr_force_enable = false;
if (cpu_has_feature(CPU_FTR_DAWR)) {
/* Don't setup sysfs file for user control on P8 */
dawr_force_enable = true;
return 0;
}
if (PVR_VER(mfspr(SPRN_PVR)) == PVR_POWER9) {
/* Turn DAWR off by default, but allow admin to turn it on */
dawr_force_enable = false;
debugfs_create_file_unsafe("dawr_enable_dangerous", 0600,
powerpc_debugfs_root,
&dawr_force_enable,
&dawr_enable_fops);
}
return 0;
}
arch_initcall(dawr_force_setup);

1068
arch/powerpc/kernel/idle_book3s.S
View File

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