diff options
| author | Daniel Thompson <daniel.thompson@linaro.org> | 2014-09-11 10:56:45 +0100 |
|---|---|---|
| committer | Daniel Thompson <daniel.thompson@linaro.org> | 2015-01-13 10:26:05 +0000 |
| commit | 59f15ca65259a7a65737d4fa8d972a9d72f2b359 (patch) | |
| tree | 8ec5b7bde404dca2c8f114a73e3cd04459465401 /arch/arm/include | |
| parent | 896e4993565e491b166e24b9f54a14115968909c (diff) | |
ARM: Add support for on-demand backtrace of other CPUs
Duplicate the x86 code to trigger a backtrace using an NMI and hook
it up to IPI on ARM. Where it is possible for the hardware to do so the
IPI will be delivered at FIQ level.
Also provide are a few small items of plumbing to hook up the new code.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/hardirq.h | 2 | ||||
| -rw-r--r-- | arch/arm/include/asm/irq.h | 5 | ||||
| -rw-r--r-- | arch/arm/include/asm/smp.h | 3 |
3 files changed, 9 insertions, 1 deletions
diff --git a/arch/arm/include/asm/hardirq.h b/arch/arm/include/asm/hardirq.h index fe3ea776dc34..5df33e30ae1b 100644 --- a/arch/arm/include/asm/hardirq.h +++ b/arch/arm/include/asm/hardirq.h @@ -5,7 +5,7 @@ #include <linux/threads.h> #include <asm/irq.h> -#define NR_IPI 8 +#define NR_IPI 9 typedef struct { unsigned int __softirq_pending; diff --git a/arch/arm/include/asm/irq.h b/arch/arm/include/asm/irq.h index 53c15dec7af6..be1d07d59ee9 100644 --- a/arch/arm/include/asm/irq.h +++ b/arch/arm/include/asm/irq.h @@ -35,6 +35,11 @@ extern void (*handle_arch_irq)(struct pt_regs *); extern void set_handle_irq(void (*handle_irq)(struct pt_regs *)); #endif +#ifdef CONFIG_SMP +extern void arch_trigger_all_cpu_backtrace(bool); +#define arch_trigger_all_cpu_backtrace(x) arch_trigger_all_cpu_backtrace(x) +#endif + #endif #endif diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h index 18f5a554134f..b076584ac0fa 100644 --- a/arch/arm/include/asm/smp.h +++ b/arch/arm/include/asm/smp.h @@ -18,6 +18,8 @@ # error "<asm/smp.h> included in non-SMP build" #endif +#define SMP_IPI_FIQ_MASK 0x0100 + #define raw_smp_processor_id() (current_thread_info()->cpu) struct seq_file; @@ -79,6 +81,7 @@ extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); +extern void ipi_cpu_backtrace(struct pt_regs *regs); extern int register_ipi_completion(struct completion *completion, int cpu); struct smp_operations { |