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arm64 fixes for -rc1 

- Prevent KASLR from mapping the top page of the virtual address space
 
 - Fix device-tree probing of SDEI driver
 
 - Fix incorrect register offset definition in Hisilicon DDRC PMU driver
 
 - Fix compilation issue with older binutils not liking unsigned immediates
 
 - Fix uapi headers so that libc can provide its own sigcontext definition
 
 - Fix handling of private compat syscalls
 
 - Hook up compat io_pgetevents() syscall for 32-bit tasks
 
 - Cleanup to arm64 Makefile (including now to avoid silly conflicts)
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "I'm safely chained back up to my desk, so please pull these arm64
  fixes for -rc1 that address some issues that cropped up during the
  merge window:

   - Prevent KASLR from mapping the top page of the virtual address
     space

   - Fix device-tree probing of SDEI driver

   - Fix incorrect register offset definition in Hisilicon DDRC PMU
     driver

   - Fix compilation issue with older binutils not liking unsigned
     immediates

   - Fix uapi headers so that libc can provide its own sigcontext
     definition

   - Fix handling of private compat syscalls

   - Hook up compat io_pgetevents() syscall for 32-bit tasks

   - Cleanup to arm64 Makefile (including now to avoid silly conflicts)"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: compat: Hook up io_pgetevents() for 32-bit tasks
  arm64: compat: Don't pull syscall number from regs in arm_compat_syscall
  arm64: compat: Avoid sending SIGILL for unallocated syscall numbers
  arm64/sve: Disentangle <uapi/asm/ptrace.h> from <uapi/asm/sigcontext.h>
  arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition
  drivers/perf: hisi: Fixup one DDRC PMU register offset
  arm64: replace arm64-obj-* in Makefile with obj-*
  arm64: kaslr: Reserve size of ARM64_MEMSTART_ALIGN in linear region
  firmware: arm_sdei: Fix DT platform device creation
  firmware: arm_sdei: fix wrong of_node_put() in init function
  arm64: entry: remove unused register aliases
  arm64: smp: Fix compilation error
This commit is contained in:
Linus Torvalds 2019-01-05 11:28:39 -08:00
parent 1205b62390 7e0b44e870
commit 078a5a4faf
13 changed files with 153 additions and 117 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm64/include/asm/smp.h
View File

@ -16,9 +16,11 @@
#ifndef __ASM_SMP_H
#define __ASM_SMP_H
#include <linux/const.h>
/* Values for secondary_data.status */
#define CPU_STUCK_REASON_SHIFT (8)
#define CPU_BOOT_STATUS_MASK ((1U << CPU_STUCK_REASON_SHIFT) - 1)
#define CPU_BOOT_STATUS_MASK ((UL(1) << CPU_STUCK_REASON_SHIFT) - 1)
#define CPU_MMU_OFF (-1)
#define CPU_BOOT_SUCCESS (0)
@ -29,8 +31,8 @@
/* Fatal system error detected by secondary CPU, crash the system */
#define CPU_PANIC_KERNEL (3)
#define CPU_STUCK_REASON_52_BIT_VA (1U << CPU_STUCK_REASON_SHIFT)
#define CPU_STUCK_REASON_NO_GRAN (2U << CPU_STUCK_REASON_SHIFT)
#define CPU_STUCK_REASON_52_BIT_VA (UL(1) << CPU_STUCK_REASON_SHIFT)
#define CPU_STUCK_REASON_NO_GRAN (UL(2) << CPU_STUCK_REASON_SHIFT)
#ifndef __ASSEMBLY__

7
arch/arm64/include/asm/unistd.h
View File

@ -40,10 +40,11 @@
* The following SVCs are ARM private.
*/
#define __ARM_NR_COMPAT_BASE 0x0f0000
#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE+2)
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE+5)
#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE + 2)
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE + 5)
#define __ARM_NR_COMPAT_END (__ARM_NR_COMPAT_BASE + 0x800)
#define __NR_compat_syscalls 399
#define __NR_compat_syscalls 400
#endif
#define __ARCH_WANT_SYS_CLONE

2
arch/arm64/include/asm/unistd32.h
View File

@ -819,6 +819,8 @@ __SYSCALL(__NR_pkey_free, sys_pkey_free)
__SYSCALL(__NR_statx, sys_statx)
#define __NR_rseq 398
__SYSCALL(__NR_rseq, sys_rseq)
#define __NR_io_pgetevents 399
__SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
/*
* Please add new compat syscalls above this comment and update

39
arch/arm64/include/uapi/asm/ptrace.h
View File

@ -23,7 +23,7 @@
#include <linux/types.h>
#include <asm/hwcap.h>
#include <asm/sigcontext.h>
#include <asm/sve_context.h>
/*
@ -130,9 +130,9 @@ struct user_sve_header {
*/
/* Offset from the start of struct user_sve_header to the register data */
#define SVE_PT_REGS_OFFSET \
((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1)) \
/ SVE_VQ_BYTES * SVE_VQ_BYTES)
#define SVE_PT_REGS_OFFSET \
((sizeof(struct user_sve_header) + (__SVE_VQ_BYTES - 1)) \
/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
/*
* The register data content and layout depends on the value of the
@ -178,39 +178,36 @@ struct user_sve_header {
* Additional data might be appended in the future.
*/
#define SVE_PT_SVE_ZREG_SIZE(vq) SVE_SIG_ZREG_SIZE(vq)
#define SVE_PT_SVE_PREG_SIZE(vq) SVE_SIG_PREG_SIZE(vq)
#define SVE_PT_SVE_FFR_SIZE(vq) SVE_SIG_FFR_SIZE(vq)
#define SVE_PT_SVE_ZREG_SIZE(vq) __SVE_ZREG_SIZE(vq)
#define SVE_PT_SVE_PREG_SIZE(vq) __SVE_PREG_SIZE(vq)
#define SVE_PT_SVE_FFR_SIZE(vq) __SVE_FFR_SIZE(vq)
#define SVE_PT_SVE_FPSR_SIZE sizeof(__u32)
#define SVE_PT_SVE_FPCR_SIZE sizeof(__u32)
#define __SVE_SIG_TO_PT(offset) \
((offset) - SVE_SIG_REGS_OFFSET + SVE_PT_REGS_OFFSET)
#define SVE_PT_SVE_OFFSET SVE_PT_REGS_OFFSET
#define SVE_PT_SVE_ZREGS_OFFSET \
__SVE_SIG_TO_PT(SVE_SIG_ZREGS_OFFSET)
(SVE_PT_REGS_OFFSET + __SVE_ZREGS_OFFSET)
#define SVE_PT_SVE_ZREG_OFFSET(vq, n) \
__SVE_SIG_TO_PT(SVE_SIG_ZREG_OFFSET(vq, n))
(SVE_PT_REGS_OFFSET + __SVE_ZREG_OFFSET(vq, n))
#define SVE_PT_SVE_ZREGS_SIZE(vq) \
(SVE_PT_SVE_ZREG_OFFSET(vq, SVE_NUM_ZREGS) - SVE_PT_SVE_ZREGS_OFFSET)
(SVE_PT_SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - SVE_PT_SVE_ZREGS_OFFSET)
#define SVE_PT_SVE_PREGS_OFFSET(vq) \
__SVE_SIG_TO_PT(SVE_SIG_PREGS_OFFSET(vq))
(SVE_PT_REGS_OFFSET + __SVE_PREGS_OFFSET(vq))
#define SVE_PT_SVE_PREG_OFFSET(vq, n) \
__SVE_SIG_TO_PT(SVE_SIG_PREG_OFFSET(vq, n))
(SVE_PT_REGS_OFFSET + __SVE_PREG_OFFSET(vq, n))
#define SVE_PT_SVE_PREGS_SIZE(vq) \
(SVE_PT_SVE_PREG_OFFSET(vq, SVE_NUM_PREGS) - \
(SVE_PT_SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - \
SVE_PT_SVE_PREGS_OFFSET(vq))
#define SVE_PT_SVE_FFR_OFFSET(vq) \
__SVE_SIG_TO_PT(SVE_SIG_FFR_OFFSET(vq))
(SVE_PT_REGS_OFFSET + __SVE_FFR_OFFSET(vq))
#define SVE_PT_SVE_FPSR_OFFSET(vq) \
((SVE_PT_SVE_FFR_OFFSET(vq) + SVE_PT_SVE_FFR_SIZE(vq) + \
(SVE_VQ_BYTES - 1)) \
/ SVE_VQ_BYTES * SVE_VQ_BYTES)
(__SVE_VQ_BYTES - 1)) \
/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
#define SVE_PT_SVE_FPCR_OFFSET(vq) \
(SVE_PT_SVE_FPSR_OFFSET(vq) + SVE_PT_SVE_FPSR_SIZE)
@ -221,8 +218,8 @@ struct user_sve_header {
#define SVE_PT_SVE_SIZE(vq, flags) \
((SVE_PT_SVE_FPCR_OFFSET(vq) + SVE_PT_SVE_FPCR_SIZE \
- SVE_PT_SVE_OFFSET + (SVE_VQ_BYTES - 1)) \
/ SVE_VQ_BYTES * SVE_VQ_BYTES)
- SVE_PT_SVE_OFFSET + (__SVE_VQ_BYTES - 1)) \
/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
#define SVE_PT_SIZE(vq, flags) \
(((flags) & SVE_PT_REGS_MASK) == SVE_PT_REGS_SVE ? \

56
arch/arm64/include/uapi/asm/sigcontext.h
View File

@ -130,6 +130,8 @@ struct sve_context {
#endif /* !__ASSEMBLY__ */
#include <asm/sve_context.h>
/*
* The SVE architecture leaves space for future expansion of the
* vector length beyond its initial architectural limit of 2048 bits
@ -138,21 +140,20 @@ struct sve_context {
* See linux/Documentation/arm64/sve.txt for a description of the VL/VQ
* terminology.
*/
#define SVE_VQ_BYTES 16 /* number of bytes per quadword */
#define SVE_VQ_BYTES __SVE_VQ_BYTES /* bytes per quadword */
#define SVE_VQ_MIN 1
#define SVE_VQ_MAX 512
#define SVE_VQ_MIN __SVE_VQ_MIN
#define SVE_VQ_MAX __SVE_VQ_MAX
#define SVE_VL_MIN (SVE_VQ_MIN * SVE_VQ_BYTES)
#define SVE_VL_MAX (SVE_VQ_MAX * SVE_VQ_BYTES)
#define SVE_VL_MIN __SVE_VL_MIN
#define SVE_VL_MAX __SVE_VL_MAX
#define SVE_NUM_ZREGS 32
#define SVE_NUM_PREGS 16
#define SVE_NUM_ZREGS __SVE_NUM_ZREGS
#define SVE_NUM_PREGS __SVE_NUM_PREGS
#define sve_vl_valid(vl) \
((vl) % SVE_VQ_BYTES == 0 && (vl) >= SVE_VL_MIN && (vl) <= SVE_VL_MAX)
#define sve_vq_from_vl(vl) ((vl) / SVE_VQ_BYTES)
#define sve_vl_from_vq(vq) ((vq) * SVE_VQ_BYTES)
#define sve_vl_valid(vl) __sve_vl_valid(vl)
#define sve_vq_from_vl(vl) __sve_vq_from_vl(vl)
#define sve_vl_from_vq(vq) __sve_vl_from_vq(vq)
/*
* If the SVE registers are currently live for the thread at signal delivery,
@ -205,34 +206,33 @@ struct sve_context {
* Additional data might be appended in the future.
*/
#define SVE_SIG_ZREG_SIZE(vq) ((__u32)(vq) * SVE_VQ_BYTES)
#define SVE_SIG_PREG_SIZE(vq) ((__u32)(vq) * (SVE_VQ_BYTES / 8))
#define SVE_SIG_FFR_SIZE(vq) SVE_SIG_PREG_SIZE(vq)
#define SVE_SIG_ZREG_SIZE(vq) __SVE_ZREG_SIZE(vq)
#define SVE_SIG_PREG_SIZE(vq) __SVE_PREG_SIZE(vq)
#define SVE_SIG_FFR_SIZE(vq) __SVE_FFR_SIZE(vq)
#define SVE_SIG_REGS_OFFSET \
((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1)) \
/ SVE_VQ_BYTES * SVE_VQ_BYTES)
((sizeof(struct sve_context) + (__SVE_VQ_BYTES - 1)) \
/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
#define SVE_SIG_ZREGS_OFFSET SVE_SIG_REGS_OFFSET
#define SVE_SIG_ZREGS_OFFSET \
(SVE_SIG_REGS_OFFSET + __SVE_ZREGS_OFFSET)
#define SVE_SIG_ZREG_OFFSET(vq, n) \
(SVE_SIG_ZREGS_OFFSET + SVE_SIG_ZREG_SIZE(vq) * (n))
#define SVE_SIG_ZREGS_SIZE(vq) \
(SVE_SIG_ZREG_OFFSET(vq, SVE_NUM_ZREGS) - SVE_SIG_ZREGS_OFFSET)
(SVE_SIG_REGS_OFFSET + __SVE_ZREG_OFFSET(vq, n))
#define SVE_SIG_ZREGS_SIZE(vq) __SVE_ZREGS_SIZE(vq)
#define SVE_SIG_PREGS_OFFSET(vq) \
(SVE_SIG_ZREGS_OFFSET + SVE_SIG_ZREGS_SIZE(vq))
(SVE_SIG_REGS_OFFSET + __SVE_PREGS_OFFSET(vq))
#define SVE_SIG_PREG_OFFSET(vq, n) \
(SVE_SIG_PREGS_OFFSET(vq) + SVE_SIG_PREG_SIZE(vq) * (n))
#define SVE_SIG_PREGS_SIZE(vq) \
(SVE_SIG_PREG_OFFSET(vq, SVE_NUM_PREGS) - SVE_SIG_PREGS_OFFSET(vq))
(SVE_SIG_REGS_OFFSET + __SVE_PREG_OFFSET(vq, n))
#define SVE_SIG_PREGS_SIZE(vq) __SVE_PREGS_SIZE(vq)
#define SVE_SIG_FFR_OFFSET(vq) \
(SVE_SIG_PREGS_OFFSET(vq) + SVE_SIG_PREGS_SIZE(vq))
(SVE_SIG_REGS_OFFSET + __SVE_FFR_OFFSET(vq))
#define SVE_SIG_REGS_SIZE(vq) \
(SVE_SIG_FFR_OFFSET(vq) + SVE_SIG_FFR_SIZE(vq) - SVE_SIG_REGS_OFFSET)
#define SVE_SIG_CONTEXT_SIZE(vq) (SVE_SIG_REGS_OFFSET + SVE_SIG_REGS_SIZE(vq))
(__SVE_FFR_OFFSET(vq) + __SVE_FFR_SIZE(vq))
#define SVE_SIG_CONTEXT_SIZE(vq) \
(SVE_SIG_REGS_OFFSET + SVE_SIG_REGS_SIZE(vq))
#endif /* _UAPI__ASM_SIGCONTEXT_H */

53
arch/arm64/include/uapi/asm/sve_context.h Normal file
View File

@ -0,0 +1,53 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Copyright (C) 2017-2018 ARM Limited */
/*
* For use by other UAPI headers only.
* Do not make direct use of header or its definitions.
*/
#ifndef _UAPI__ASM_SVE_CONTEXT_H
#define _UAPI__ASM_SVE_CONTEXT_H
#include <linux/types.h>
#define __SVE_VQ_BYTES 16 /* number of bytes per quadword */
#define __SVE_VQ_MIN 1
#define __SVE_VQ_MAX 512
#define __SVE_VL_MIN (__SVE_VQ_MIN * __SVE_VQ_BYTES)
#define __SVE_VL_MAX (__SVE_VQ_MAX * __SVE_VQ_BYTES)
#define __SVE_NUM_ZREGS 32
#define __SVE_NUM_PREGS 16
#define __sve_vl_valid(vl) \
((vl) % __SVE_VQ_BYTES == 0 && \
(vl) >= __SVE_VL_MIN && \
(vl) <= __SVE_VL_MAX)
#define __sve_vq_from_vl(vl) ((vl) / __SVE_VQ_BYTES)
#define __sve_vl_from_vq(vq) ((vq) * __SVE_VQ_BYTES)
#define __SVE_ZREG_SIZE(vq) ((__u32)(vq) * __SVE_VQ_BYTES)
#define __SVE_PREG_SIZE(vq) ((__u32)(vq) * (__SVE_VQ_BYTES / 8))
#define __SVE_FFR_SIZE(vq) __SVE_PREG_SIZE(vq)
#define __SVE_ZREGS_OFFSET 0
#define __SVE_ZREG_OFFSET(vq, n) \
(__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n))
#define __SVE_ZREGS_SIZE(vq) \
(__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET)
#define __SVE_PREGS_OFFSET(vq) \
(__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq))
#define __SVE_PREG_OFFSET(vq, n) \
(__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n))
#define __SVE_PREGS_SIZE(vq) \
(__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq))
#define __SVE_FFR_OFFSET(vq) \
(__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq))
#endif /* ! _UAPI__ASM_SVE_CONTEXT_H */

61
arch/arm64/kernel/Makefile
View File

@ -12,7 +12,7 @@ CFLAGS_REMOVE_insn.o = -pg
CFLAGS_REMOVE_return_address.o = -pg
# Object file lists.
arm64-obj-y := debug-monitors.o entry.o irq.o fpsimd.o \
obj-y := debug-monitors.o entry.o irq.o fpsimd.o \
entry-fpsimd.o process.o ptrace.o setup.o signal.o \
sys.o stacktrace.o time.o traps.o io.o vdso.o \
hyp-stub.o psci.o cpu_ops.o insn.o \
@ -27,41 +27,40 @@ OBJCOPYFLAGS := --prefix-symbols=__efistub_
$(obj)/%.stub.o: $(obj)/%.o FORCE
$(call if_changed,objcopy)
arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \
obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \
sys_compat.o
arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
arm64-obj-$(CONFIG_MODULES) += module.o
arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
arm64-obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
arm64-obj-$(CONFIG_CPU_PM) += sleep.o suspend.o
arm64-obj-$(CONFIG_CPU_IDLE) += cpuidle.o
arm64-obj-$(CONFIG_JUMP_LABEL) += jump_label.o
arm64-obj-$(CONFIG_KGDB) += kgdb.o
arm64-obj-$(CONFIG_EFI) += efi.o efi-entry.stub.o \
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
obj-$(CONFIG_CPU_PM) += sleep.o suspend.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_EFI) += efi.o efi-entry.stub.o \
efi-rt-wrapper.o
arm64-obj-$(CONFIG_PCI) += pci.o
arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o
arm64-obj-$(CONFIG_ACPI) += acpi.o
arm64-obj-$(CONFIG_ACPI_NUMA) += acpi_numa.o
arm64-obj-$(CONFIG_ARM64_ACPI_PARKING_PROTOCOL) += acpi_parking_protocol.o
arm64-obj-$(CONFIG_PARAVIRT) += paravirt.o
arm64-obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
arm64-obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate-asm.o
arm64-obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o relocate_kernel.o \
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o
obj-$(CONFIG_ACPI) += acpi.o
obj-$(CONFIG_ACPI_NUMA) += acpi_numa.o
obj-$(CONFIG_ARM64_ACPI_PARKING_PROTOCOL) += acpi_parking_protocol.o
obj-$(CONFIG_PARAVIRT) += paravirt.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate-asm.o
obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o relocate_kernel.o \
cpu-reset.o
arm64-obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o
arm64-obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o
obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
arm64-obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
arm64-obj-$(CONFIG_CRASH_CORE) += crash_core.o
arm64-obj-$(CONFIG_ARM_SDE_INTERFACE) += sdei.o
arm64-obj-$(CONFIG_ARM64_SSBD) += ssbd.o
arm64-obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_CRASH_CORE) += crash_core.o
obj-$(CONFIG_ARM_SDE_INTERFACE) += sdei.o
obj-$(CONFIG_ARM64_SSBD) += ssbd.o
obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o
obj-y += $(arm64-obj-y) vdso/ probes/
obj-m += $(arm64-obj-m)
obj-y += vdso/ probes/
head-y := head.o
extra-y += $(head-y) vmlinux.lds

12
arch/arm64/kernel/entry.S
View File

@ -392,17 +392,7 @@ alternative_insn eret, nop, ARM64_UNMAP_KERNEL_AT_EL0
mov sp, x19
.endm
/*
* These are the registers used in the syscall handler, and allow us to
* have in theory up to 7 arguments to a function - x0 to x6.
*
* x7 is reserved for the system call number in 32-bit mode.
*/
wsc_nr .req w25 // number of system calls
xsc_nr .req x25 // number of system calls (zero-extended)
wscno .req w26 // syscall number
xscno .req x26 // syscall number (zero-extended)
stbl .req x27 // syscall table pointer
/* GPRs used by entry code */
tsk .req x28 // current thread_info
/*

11
arch/arm64/kernel/sys_compat.c
View File

@ -66,12 +66,11 @@ do_compat_cache_op(unsigned long start, unsigned long end, int flags)
/*
* Handle all unrecognised system calls.
*/
long compat_arm_syscall(struct pt_regs *regs)
long compat_arm_syscall(struct pt_regs *regs, int scno)
{
unsigned int no = regs->regs[7];
void __user *addr;
switch (no) {
switch (scno) {
/*
* Flush a region from virtual address 'r0' to virtual address 'r1'
* _exclusive_. There is no alignment requirement on either address;
@ -102,12 +101,12 @@ long compat_arm_syscall(struct pt_regs *regs)
default:
/*
* Calls 9f00xx..9f07ff are defined to return -ENOSYS
* Calls 0xf0xxx..0xf07ff are defined to return -ENOSYS
* if not implemented, rather than raising SIGILL. This
* way the calling program can gracefully determine whether
* a feature is supported.
*/
if ((no & 0xffff) <= 0x7ff)
if (scno < __ARM_NR_COMPAT_END)
return -ENOSYS;
break;
}
@ -116,6 +115,6 @@ long compat_arm_syscall(struct pt_regs *regs)
(compat_thumb_mode(regs) ? 2 : 4);
arm64_notify_die("Oops - bad compat syscall(2)", regs,
SIGILL, ILL_ILLTRP, addr, no);
SIGILL, ILL_ILLTRP, addr, scno);
return 0;
}

9
arch/arm64/kernel/syscall.c
View File

@ -13,16 +13,15 @@
#include <asm/thread_info.h>
#include <asm/unistd.h>
long compat_arm_syscall(struct pt_regs *regs);
long compat_arm_syscall(struct pt_regs *regs, int scno);
long sys_ni_syscall(void);
asmlinkage long do_ni_syscall(struct pt_regs *regs)
static long do_ni_syscall(struct pt_regs *regs, int scno)
{
#ifdef CONFIG_COMPAT
long ret;
if (is_compat_task()) {
ret = compat_arm_syscall(regs);
ret = compat_arm_syscall(regs, scno);
if (ret != -ENOSYS)
return ret;
}
@ -47,7 +46,7 @@ static void invoke_syscall(struct pt_regs *regs, unsigned int scno,
syscall_fn = syscall_table[array_index_nospec(scno, sc_nr)];
ret = __invoke_syscall(regs, syscall_fn);
} else {
ret = do_ni_syscall(regs);
ret = do_ni_syscall(regs, scno);
}
regs->regs[0] = ret;

2
arch/arm64/mm/init.c
View File

@ -439,7 +439,7 @@ void __init arm64_memblock_init(void)
* memory spans, randomize the linear region as well.
*/
if (memstart_offset_seed > 0 && range >= ARM64_MEMSTART_ALIGN) {
range = range / ARM64_MEMSTART_ALIGN + 1;
range /= ARM64_MEMSTART_ALIGN;
memstart_addr -= ARM64_MEMSTART_ALIGN *
((range * memstart_offset_seed) >> 16);
}

6
drivers/firmware/arm_sdei.c
View File

@ -1009,7 +1009,6 @@ static struct platform_driver sdei_driver = {
static bool __init sdei_present_dt(void)
{
struct platform_device *pdev;
struct device_node *np, *fw_np;
fw_np = of_find_node_by_name(NULL, "firmware");
@ -1017,14 +1016,9 @@ static bool __init sdei_present_dt(void)
return false;
np = of_find_matching_node(fw_np, sdei_of_match);
of_node_put(fw_np);
if (!np)
return false;
pdev = of_platform_device_create(np, sdei_driver.driver.name, NULL);
of_node_put(np);
if (!pdev)
return false;
return true;
}

4
drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
View File

@ -30,8 +30,8 @@
#define DDRC_FLUX_RCMD 0x38c
#define DDRC_PRE_CMD 0x3c0
#define DDRC_ACT_CMD 0x3c4
#define DDRC_BNK_CHG 0x3c8
#define DDRC_RNK_CHG 0x3cc
#define DDRC_RW_CHG 0x3d0
#define DDRC_EVENT_CTRL 0x6C0
#define DDRC_INT_MASK 0x6c8
#define DDRC_INT_STATUS 0x6cc
@ -51,7 +51,7 @@
static const u32 ddrc_reg_off[] = {
DDRC_FLUX_WR, DDRC_FLUX_RD, DDRC_FLUX_WCMD, DDRC_FLUX_RCMD,
DDRC_PRE_CMD, DDRC_ACT_CMD, DDRC_BNK_CHG, DDRC_RNK_CHG
DDRC_PRE_CMD, DDRC_ACT_CMD, DDRC_RNK_CHG, DDRC_RW_CHG
};
/*