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Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 

Pull ARM updates from Russell King:
 "In this ARM merge, we remove more lines than we add.  Changes include:

   - Enable imprecise aborts early, so that bus errors aren't masked
     until later in the boot.  This has the side effect that boot
     loaders which provoke these aborts can cause the kernel to crash
     early in boot, so we install a handler to report this event around
     the site where these are enabled.

   - Remove the buggy but impossible to enable cmpxchg syscall code.

   - Add unwinding annotations to some assembly code.

   - Add support for atomic half-word exchange for ARMv6k+.

   - Reduce ioremap() alignment for SMP/LPAE cases where we don't need
     the large alignment.

   - Addition of an "optimal" 3G configuration for systems with 1G of
     RAM.

   - Increase vmalloc space by 128M.

   - Constify some SMP operations structures, which have never been
     writable.

   - Improve ARMs dma_mmap() support for mapping DMA coherent mappings
     into userspace.

   - Fix to the NMI backtrace code in the IPI case on ARM where the
     failing CPU gets stuck for 10s waiting for its own IPI to be
     delivered.

   - Removal of legacy PM support from the AMBA bus driver.

   - Another fix for the previous fix of vdsomunge"

* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (23 commits)
  ARM: 8449/1: fix bug in vdsomunge swab32 macro
  arm: add missing of_node_put
  ARM: 8447/1: catch pending imprecise abort on unmask
  ARM: 8446/1: amba: Remove unused callbacks for legacy system PM
  ARM: 8443/1: Adding support for atomic half word exchange
  ARM: clean up TWD after previous patch
  ARM: 8441/2: twd: Don't set CLOCK_EVT_FEAT_C3STOP unconditionally
  ARM: 8440/1: remove obsolete documentation
  ARM: make highpte an expert option
  ARM: 8433/1: add a VMSPLIT_3G_OPT config option
  ARM: 8439/1: Fix backtrace generation when IPI is masked
  ARM: 8428/1: kgdb: Fix registers on sleeping tasks
  ARM: 8427/1: dma-mapping: add support for offset parameter in dma_mmap()
  ARM: 8426/1: dma-mapping: add missing range check in dma_mmap()
  ARM: remove user cmpxchg syscall
  ARM: 8438/1: Add unwinding to __clear_user_std()
  ARM: 8436/1: hw_breakpoint: remove unnecessary header
  ARM: 8434/2: Revert "7655/1: smp_twd: make twd_local_timer_of_register() no-op for nosmp"
  ARM: 8432/1: move VMALLOC_END from 0xff000000 to 0xff800000
  ARM: 8430/1: use default ioremap alignment for SMP or LPAE
  ...
This commit is contained in:
Linus Torvalds 2015-11-03 13:54:35 -08:00
parent 2c2b8285dc 116ef0fcc9
commit 316dde2fe9
27 changed files with 128 additions and 158 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/arm/SA1100/Victor
View File

@ -1,16 +0,0 @@
Victor is known as a "digital talking book player" manufactured by
VisuAide, Inc. to be used by blind people.
For more information related to Victor, see:
http://www.humanware.com/en-usa/products
Of course Victor is using Linux as its main operating system.
The Victor implementation for Linux is maintained by Nicolas Pitre:
nico@visuaide.com
nico@fluxnic.net
For any comments, please feel free to contact me through the above
addresses.

2
Documentation/arm/memory.txt
View File

@ -54,7 +54,7 @@ VMALLOC_START VMALLOC_END-1 vmalloc() / ioremap() space.
located here through iotable_init().
VMALLOC_START is based upon the value
of the high_memory variable, and VMALLOC_END
is equal to 0xff000000.
is equal to 0xff800000.
PAGE_OFFSET high_memory-1 Kernel direct-mapped RAM region.
This maps the platforms RAM, and typically

5
Documentation/devicetree/bindings/arm/twd.txt
View File

@ -19,6 +19,11 @@ interrupts.
- reg : Specify the base address and the size of the TWD timer
register window.
Optional
- always-on : a boolean property. If present, the timer is powered through
an always-on power domain, therefore it never loses context.
Example:
twd-timer@2c000600 {

7
arch/arm/Kconfig
View File

@ -1411,7 +1411,6 @@ config HAVE_ARM_ARCH_TIMER
config HAVE_ARM_TWD
bool
depends on SMP
select CLKSRC_OF if OF
help
This options enables support for the ARM timer and watchdog unit
@ -1471,6 +1470,8 @@ choice
config VMSPLIT_3G
bool "3G/1G user/kernel split"
config VMSPLIT_3G_OPT
bool "3G/1G user/kernel split (for full 1G low memory)"
config VMSPLIT_2G
bool "2G/2G user/kernel split"
config VMSPLIT_1G
@ -1482,6 +1483,7 @@ config PAGE_OFFSET
default PHYS_OFFSET if !MMU
default 0x40000000 if VMSPLIT_1G
default 0x80000000 if VMSPLIT_2G
default 0xB0000000 if VMSPLIT_3G_OPT
default 0xC0000000
config NR_CPUS
@ -1696,8 +1698,9 @@ config HIGHMEM
If unsure, say n.
config HIGHPTE
bool "Allocate 2nd-level pagetables from highmem"
bool "Allocate 2nd-level pagetables from highmem" if EXPERT
depends on HIGHMEM
default y
help
The VM uses one page of physical memory for each page table.
For systems with a lot of processes, this can use a lot of

12
arch/arm/include/asm/cmpxchg.h
View File

@ -39,6 +39,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
switch (size) {
#if __LINUX_ARM_ARCH__ >= 6
#ifndef CONFIG_CPU_V6 /* MIN ARCH >= V6K */
case 1:
asm volatile("@ __xchg1\n"
"1: ldrexb %0, [%3]\n"
@ -49,6 +50,17 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
: "r" (x), "r" (ptr)
: "memory", "cc");
break;
case 2:
asm volatile("@ __xchg2\n"
"1: ldrexh %0, [%3]\n"
" strexh %1, %2, [%3]\n"
" teq %1, #0\n"
" bne 1b"
: "=&r" (ret), "=&r" (tmp)
: "r" (x), "r" (ptr)
: "memory", "cc");
break;
#endif
case 4:
asm volatile("@ __xchg4\n"
"1: ldrex %0, [%3]\n"

10
arch/arm/include/asm/irqflags.h
View File

@ -54,6 +54,14 @@ static inline void arch_local_irq_disable(void)
#define local_fiq_enable() __asm__("cpsie f @ __stf" : : : "memory", "cc")
#define local_fiq_disable() __asm__("cpsid f @ __clf" : : : "memory", "cc")
#ifndef CONFIG_CPU_V7M
#define local_abt_enable() __asm__("cpsie a @ __sta" : : : "memory", "cc")
#define local_abt_disable() __asm__("cpsid a @ __cla" : : : "memory", "cc")
#else
#define local_abt_enable() do { } while (0)
#define local_abt_disable() do { } while (0)
#endif
#else
/*
@ -136,6 +144,8 @@ static inline void arch_local_irq_disable(void)
: "memory", "cc"); \
})
#define local_abt_enable() do { } while (0)
#define local_abt_disable() do { } while (0)
#endif
/*

2
arch/arm/include/asm/mach/arch.h
View File

@ -47,7 +47,7 @@ struct machine_desc {
unsigned l2c_aux_val; /* L2 cache aux value */
unsigned l2c_aux_mask; /* L2 cache aux mask */
void (*l2c_write_sec)(unsigned long, unsigned);
struct smp_operations *smp; /* SMP operations */
const struct smp_operations *smp; /* SMP operations */
bool (*smp_init)(void);
void (*fixup)(struct tag *, char **);
void (*dt_fixup)(void);

2
arch/arm/include/asm/memory.h
View File

@ -76,10 +76,12 @@
*/
#define XIP_VIRT_ADDR(physaddr) (MODULES_VADDR + ((physaddr) & 0x000fffff))
#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
/*
* Allow 16MB-aligned ioremap pages
*/
#define IOREMAP_MAX_ORDER 24
#endif
#else /* CONFIG_MMU */

2
arch/arm/include/asm/pgtable.h
View File

@ -43,7 +43,7 @@
*/
#define VMALLOC_OFFSET (8*1024*1024)
#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END 0xff000000UL
#define VMALLOC_END 0xff800000UL
#define LIBRARY_TEXT_START 0x0c000000

4
arch/arm/include/asm/smp.h
View File

@ -112,7 +112,7 @@ struct smp_operations {
struct of_cpu_method {
const char *method;
struct smp_operations *ops;
const struct smp_operations *ops;
};
#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
@ -122,6 +122,6 @@ struct of_cpu_method {
/*
* set platform specific SMP operations
*/
extern void smp_set_ops(struct smp_operations *);
extern void smp_set_ops(const struct smp_operations *);
#endif /* ifndef __ASM_ARM_SMP_H */

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

@ -21,13 +21,6 @@
*/
#define __NR_syscalls (392)
/*
* *NOTE*: This is a ghost syscall private to the kernel. Only the
* __kuser_cmpxchg code in entry-armv.S should be aware of its
* existence. Don't ever use this from user code.
*/
#define __ARM_NR_cmpxchg (__ARM_NR_BASE+0x00fff0)
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_GETHOSTNAME
#define __ARCH_WANT_SYS_PAUSE

12
arch/arm/kernel/devtree.c
View File

@ -101,6 +101,7 @@ void __init arm_dt_init_cpu_maps(void)
if (of_property_read_u32(cpu, "reg", &hwid)) {
pr_debug(" * %s missing reg property\n",
cpu->full_name);
of_node_put(cpu);
return;
}
@ -108,8 +109,10 @@ void __init arm_dt_init_cpu_maps(void)
* 8 MSBs must be set to 0 in the DT since the reg property
* defines the MPIDR[23:0].
*/
if (hwid & ~MPIDR_HWID_BITMASK)
if (hwid & ~MPIDR_HWID_BITMASK) {
of_node_put(cpu);
return;
}
/*
* Duplicate MPIDRs are a recipe for disaster.
@ -119,9 +122,11 @@ void __init arm_dt_init_cpu_maps(void)
* to avoid matching valid MPIDR[23:0] values.
*/
for (j = 0; j < cpuidx; j++)
if (WARN(tmp_map[j] == hwid, "Duplicate /cpu reg "
"properties in the DT\n"))
if (WARN(tmp_map[j] == hwid,
"Duplicate /cpu reg properties in the DT\n")) {
of_node_put(cpu);
return;
}
/*
* Build a stashed array of MPIDR values. Numbering scheme
@ -143,6 +148,7 @@ void __init arm_dt_init_cpu_maps(void)
"max cores %u, capping them\n",
cpuidx, nr_cpu_ids)) {
cpuidx = nr_cpu_ids;
of_node_put(cpu);
break;
}

33
arch/arm/kernel/entry-armv.S
View File

@ -427,8 +427,7 @@ ENDPROC(__fiq_abt)
.endm
.macro kuser_cmpxchg_check
#if !defined(CONFIG_CPU_32v6K) && defined(CONFIG_KUSER_HELPERS) && \
!defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
#if !defined(CONFIG_CPU_32v6K) && defined(CONFIG_KUSER_HELPERS)
#ifndef CONFIG_MMU
#warning "NPTL on non MMU needs fixing"
#else
@ -859,20 +858,7 @@ __kuser_helper_start:
__kuser_cmpxchg64: @ 0xffff0f60
#if defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
/*
* Poor you. No fast solution possible...
* The kernel itself must perform the operation.
* A special ghost syscall is used for that (see traps.c).
*/
stmfd sp!, {r7, lr}
ldr r7, 1f @ it's 20 bits
swi __ARM_NR_cmpxchg64
ldmfd sp!, {r7, pc}
1: .word __ARM_NR_cmpxchg64
#elif defined(CONFIG_CPU_32v6K)
#if defined(CONFIG_CPU_32v6K)
stmfd sp!, {r4, r5, r6, r7}
ldrd r4, r5, [r0] @ load old val
@ -948,20 +934,7 @@ __kuser_memory_barrier: @ 0xffff0fa0
__kuser_cmpxchg: @ 0xffff0fc0
#if defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
/*
* Poor you. No fast solution possible...
* The kernel itself must perform the operation.
* A special ghost syscall is used for that (see traps.c).
*/
stmfd sp!, {r7, lr}
ldr r7, 1f @ it's 20 bits
swi __ARM_NR_cmpxchg
ldmfd sp!, {r7, pc}
1: .word __ARM_NR_cmpxchg
#elif __LINUX_ARM_ARCH__ < 6
#if __LINUX_ARM_ARCH__ < 6
#ifdef CONFIG_MMU

1
arch/arm/kernel/hw_breakpoint.c
View File

@ -35,7 +35,6 @@
#include <asm/cputype.h>
#include <asm/current.h>
#include <asm/hw_breakpoint.h>
#include <asm/kdebug.h>
#include <asm/traps.h>
/* Breakpoint currently in use for each BRP. */

31
arch/arm/kernel/kgdb.c
View File

@ -74,7 +74,7 @@ int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)
void
sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task)
{
struct pt_regs *thread_regs;
struct thread_info *ti;
int regno;
/* Just making sure... */
@ -86,24 +86,17 @@ sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task)
gdb_regs[regno] = 0;
/* Otherwise, we have only some registers from switch_to() */
thread_regs = task_pt_regs(task);
gdb_regs[_R0] = thread_regs->ARM_r0;
gdb_regs[_R1] = thread_regs->ARM_r1;
gdb_regs[_R2] = thread_regs->ARM_r2;
gdb_regs[_R3] = thread_regs->ARM_r3;
gdb_regs[_R4] = thread_regs->ARM_r4;
gdb_regs[_R5] = thread_regs->ARM_r5;
gdb_regs[_R6] = thread_regs->ARM_r6;
gdb_regs[_R7] = thread_regs->ARM_r7;
gdb_regs[_R8] = thread_regs->ARM_r8;
gdb_regs[_R9] = thread_regs->ARM_r9;
gdb_regs[_R10] = thread_regs->ARM_r10;
gdb_regs[_FP] = thread_regs->ARM_fp;
gdb_regs[_IP] = thread_regs->ARM_ip;
gdb_regs[_SPT] = thread_regs->ARM_sp;
gdb_regs[_LR] = thread_regs->ARM_lr;
gdb_regs[_PC] = thread_regs->ARM_pc;
gdb_regs[_CPSR] = thread_regs->ARM_cpsr;
ti = task_thread_info(task);
gdb_regs[_R4] = ti->cpu_context.r4;
gdb_regs[_R5] = ti->cpu_context.r5;
gdb_regs[_R6] = ti->cpu_context.r6;
gdb_regs[_R7] = ti->cpu_context.r7;
gdb_regs[_R8] = ti->cpu_context.r8;
gdb_regs[_R9] = ti->cpu_context.r9;
gdb_regs[_R10] = ti->cpu_context.sl;
gdb_regs[_FP] = ti->cpu_context.fp;
gdb_regs[_SPT] = ti->cpu_context.sp;
gdb_regs[_PC] = ti->cpu_context.pc;
}
void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc)

12
arch/arm/kernel/smp.c
View File

@ -80,7 +80,7 @@ static DECLARE_COMPLETION(cpu_running);
static struct smp_operations smp_ops;
void __init smp_set_ops(struct smp_operations *ops)
void __init smp_set_ops(const struct smp_operations *ops)
{
if (ops)
smp_ops = *ops;
@ -400,6 +400,7 @@ asmlinkage void secondary_start_kernel(void)
local_irq_enable();
local_fiq_enable();
local_abt_enable();
/*
* OK, it's off to the idle thread for us
@ -748,6 +749,15 @@ core_initcall(register_cpufreq_notifier);
static void raise_nmi(cpumask_t *mask)
{
/*
* Generate the backtrace directly if we are running in a calling
* context that is not preemptible by the backtrace IPI. Note
* that nmi_cpu_backtrace() automatically removes the current cpu
* from mask.
*/
if (cpumask_test_cpu(smp_processor_id(), mask) && irqs_disabled())
nmi_cpu_backtrace(NULL);
smp_cross_call(mask, IPI_CPU_BACKTRACE);
}

11
arch/arm/kernel/smp_twd.c
View File

@ -23,7 +23,6 @@
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <asm/smp_plat.h>
#include <asm/smp_twd.h>
/* set up by the platform code */
@ -34,6 +33,8 @@ static unsigned long twd_timer_rate;
static DEFINE_PER_CPU(bool, percpu_setup_called);
static struct clock_event_device __percpu *twd_evt;
static unsigned int twd_features =
CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
static int twd_ppi;
static int twd_shutdown(struct clock_event_device *clk)
@ -294,8 +295,7 @@ static void twd_timer_setup(void)
writel_relaxed(0, twd_base + TWD_TIMER_CONTROL);
clk->name = "local_timer";
clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
CLOCK_EVT_FEAT_C3STOP;
clk->features = twd_features;
clk->rating = 350;
clk->set_state_shutdown = twd_shutdown;
clk->set_state_periodic = twd_set_periodic;
@ -350,6 +350,8 @@ static int __init twd_local_timer_common_register(struct device_node *np)
goto out_irq;
twd_get_clock(np);
if (!of_property_read_bool(np, "always-on"))
twd_features |= CLOCK_EVT_FEAT_C3STOP;
/*
* Immediately configure the timer on the boot CPU, unless we need
@ -392,9 +394,6 @@ static void __init twd_local_timer_of_register(struct device_node *np)
{
int err;
if (!is_smp() || !setup_max_cpus)
return;
twd_ppi = irq_of_parse_and_map(np, 0);
if (!twd_ppi) {
err = -EINVAL;

52
arch/arm/kernel/traps.c
View File

@ -625,58 +625,6 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
set_tls(regs->ARM_r0);
return 0;
#ifdef CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG
/*
* Atomically store r1 in *r2 if *r2 is equal to r0 for user space.
* Return zero in r0 if *MEM was changed or non-zero if no exchange
* happened. Also set the user C flag accordingly.
* If access permissions have to be fixed up then non-zero is
* returned and the operation has to be re-attempted.
*
* *NOTE*: This is a ghost syscall private to the kernel. Only the
* __kuser_cmpxchg code in entry-armv.S should be aware of its
* existence. Don't ever use this from user code.
*/
case NR(cmpxchg):
for (;;) {
extern void do_DataAbort(unsigned long addr, unsigned int fsr,
struct pt_regs *regs);
unsigned long val;
unsigned long addr = regs->ARM_r2;
struct mm_struct *mm = current->mm;
pgd_t *pgd; pmd_t *pmd; pte_t *pte;
spinlock_t *ptl;
regs->ARM_cpsr &= ~PSR_C_BIT;
down_read(&mm->mmap_sem);
pgd = pgd_offset(mm, addr);
if (!pgd_present(*pgd))
goto bad_access;
pmd = pmd_offset(pgd, addr);
if (!pmd_present(*pmd))
goto bad_access;
pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
if (!pte_present(*pte) || !pte_write(*pte) || !pte_dirty(*pte)) {
pte_unmap_unlock(pte, ptl);
goto bad_access;
}
val = *(unsigned long *)addr;
val -= regs->ARM_r0;
if (val == 0) {
*(unsigned long *)addr = regs->ARM_r1;
regs->ARM_cpsr |= PSR_C_BIT;
}
pte_unmap_unlock(pte, ptl);
up_read(&mm->mmap_sem);
return val;
bad_access:
up_read(&mm->mmap_sem);
/* simulate a write access fault */
do_DataAbort(addr, 15 + (1 << 11), regs);
}
#endif
default:
/* Calls 9f00xx..9f07ff are defined to return -ENOSYS
if not implemented, rather than raising SIGILL. This

4
arch/arm/lib/clear_user.S
View File

@ -9,6 +9,7 @@
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/unwind.h>
.text
@ -20,6 +21,8 @@
*/
ENTRY(__clear_user_std)
WEAK(arm_clear_user)
UNWIND(.fnstart)
UNWIND(.save {r1, lr})
stmfd sp!, {r1, lr}
mov r2, #0
cmp r1, #4
@ -44,6 +47,7 @@ WEAK(arm_clear_user)
USER( strnebt r2, [r0])
mov r0, #0
ldmfd sp!, {r1, pc}
UNWIND(.fnend)
ENDPROC(arm_clear_user)
ENDPROC(__clear_user_std)

12
arch/arm/mm/Kconfig
View File

@ -419,28 +419,24 @@ config CPU_THUMBONLY
config CPU_32v3
bool
select CPU_USE_DOMAINS if MMU
select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
select NEED_KUSER_HELPERS
select TLS_REG_EMUL if SMP || !MMU
config CPU_32v4
bool
select CPU_USE_DOMAINS if MMU
select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
select NEED_KUSER_HELPERS
select TLS_REG_EMUL if SMP || !MMU
config CPU_32v4T
bool
select CPU_USE_DOMAINS if MMU
select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
select NEED_KUSER_HELPERS
select TLS_REG_EMUL if SMP || !MMU
config CPU_32v5
bool
select CPU_USE_DOMAINS if MMU
select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
select NEED_KUSER_HELPERS
select TLS_REG_EMUL if SMP || !MMU
@ -805,14 +801,6 @@ config TLS_REG_EMUL
a few prototypes like that in existence) and therefore access to
that required register must be emulated.
config NEEDS_SYSCALL_FOR_CMPXCHG
bool
select NEED_KUSER_HELPERS
help
SMP on a pre-ARMv6 processor? Well OK then.
Forget about fast user space cmpxchg support.
It is just not possible.
config NEED_KUSER_HELPERS
bool

7
arch/arm/mm/dma-mapping.c
View File

@ -1407,12 +1407,19 @@ static int arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
unsigned long uaddr = vma->vm_start;
unsigned long usize = vma->vm_end - vma->vm_start;
struct page **pages = __iommu_get_pages(cpu_addr, attrs);
unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long off = vma->vm_pgoff;
vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot);
if (!pages)
return -ENXIO;
if (off >= nr_pages || (usize >> PAGE_SHIFT) > nr_pages - off)
return -ENXIO;
pages += off;
do {
int ret = vm_insert_page(vma, uaddr, *pages++);
if (ret) {

22
arch/arm/mm/fault.c
View File

@ -593,6 +593,28 @@ do_PrefetchAbort(unsigned long addr, unsigned int ifsr, struct pt_regs *regs)
arm_notify_die("", regs, &info, ifsr, 0);
}
/*
* Abort handler to be used only during first unmasking of asynchronous aborts
* on the boot CPU. This makes sure that the machine will not die if the
* firmware/bootloader left an imprecise abort pending for us to trip over.
*/
static int __init early_abort_handler(unsigned long addr, unsigned int fsr,
struct pt_regs *regs)
{
pr_warn("Hit pending asynchronous external abort (FSR=0x%08x) during "
"first unmask, this is most likely caused by a "
"firmware/bootloader bug.\n", fsr);
return 0;
}
void __init early_abt_enable(void)
{
fsr_info[22].fn = early_abort_handler;
local_abt_enable();
fsr_info[22].fn = do_bad;
}
#ifndef CONFIG_ARM_LPAE
static int __init exceptions_init(void)
{

1
arch/arm/mm/fault.h
View File

@ -24,5 +24,6 @@ static inline int fsr_fs(unsigned int fsr)
void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
unsigned long search_exception_table(unsigned long addr);
void early_abt_enable(void);
#endif /* __ARCH_ARM_FAULT_H */

4
arch/arm/mm/mmu.c
View File

@ -38,6 +38,7 @@
#include <asm/mach/pci.h>
#include <asm/fixmap.h>
#include "fault.h"
#include "mm.h"
#include "tcm.h"
@ -1363,6 +1364,9 @@ static void __init devicemaps_init(const struct machine_desc *mdesc)
*/
local_flush_tlb_all();
flush_cache_all();
/* Enable asynchronous aborts */
early_abt_enable();
}
static void __init kmap_init(void)

2
arch/arm/vdso/vdsomunge.c
View File

@ -66,7 +66,7 @@
((((x) & 0x000000ff) << 24) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0xff000000) << 24))
(((x) & 0xff000000) >> 24))
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define HOST_ORDER ELFDATA2LSB

2
include/linux/amba/bus.h
View File

@ -41,8 +41,6 @@ struct amba_driver {
int (*probe)(struct amba_device *, const struct amba_id *);
int (*remove)(struct amba_device *);
void (*shutdown)(struct amba_device *);
int (*suspend)(struct amba_device *, pm_message_t);
int (*resume)(struct amba_device *);
const struct amba_id *id_table;
};

11
lib/nmi_backtrace.c
View File

@ -43,6 +43,12 @@ static void print_seq_line(struct nmi_seq_buf *s, int start, int end)
printk("%.*s", (end - start) + 1, buf);
}
/*
* When raise() is called it will be is passed a pointer to the
* backtrace_mask. Architectures that call nmi_cpu_backtrace()
* directly from their raise() functions may rely on the mask
* they are passed being updated as a side effect of this call.
*/
void nmi_trigger_all_cpu_backtrace(bool include_self,
void (*raise)(cpumask_t *mask))
{
@ -149,7 +155,10 @@ bool nmi_cpu_backtrace(struct pt_regs *regs)
/* Replace printk to write into the NMI seq */
this_cpu_write(printk_func, nmi_vprintk);
pr_warn("NMI backtrace for cpu %d\n", cpu);
show_regs(regs);
if (regs)
show_regs(regs);
else
dump_stack();
this_cpu_write(printk_func, printk_func_save);
cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));