diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/riscv/include/asm/irq.h | 5 | ||||
| -rw-r--r-- | arch/riscv/kernel/smp.c | 16 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h index 8e10a94430a2..8330d16b05b5 100644 --- a/arch/riscv/include/asm/irq.h +++ b/arch/riscv/include/asm/irq.h @@ -12,6 +12,11 @@ #include <asm-generic/irq.h> +#ifdef CONFIG_SMP +void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu); +#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace +#endif + void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void)); struct fwnode_handle *riscv_get_intc_hwnode(void); diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index 8e6eb64459af..9b047899791c 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -21,6 +21,7 @@ #include <linux/delay.h> #include <linux/irq.h> #include <linux/irq_work.h> +#include <linux/nmi.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> @@ -33,6 +34,7 @@ enum ipi_message_type { IPI_CPU_CRASH_STOP, IPI_IRQ_WORK, IPI_TIMER, + IPI_CPU_BACKTRACE, IPI_MAX }; @@ -136,6 +138,9 @@ static irqreturn_t handle_IPI(int irq, void *data) tick_receive_broadcast(); break; #endif + case IPI_CPU_BACKTRACE: + nmi_cpu_backtrace(get_irq_regs()); + break; default: pr_warn("CPU%d: unhandled IPI%d\n", smp_processor_id(), ipi); break; @@ -203,6 +208,7 @@ static const char * const ipi_names[] = { [IPI_CPU_CRASH_STOP] = "CPU stop (for crash dump) interrupts", [IPI_IRQ_WORK] = "IRQ work interrupts", [IPI_TIMER] = "Timer broadcast interrupts", + [IPI_CPU_BACKTRACE] = "CPU backtrace interrupts", }; void show_ipi_stats(struct seq_file *p, int prec) @@ -323,3 +329,13 @@ void arch_smp_send_reschedule(int cpu) send_ipi_single(cpu, IPI_RESCHEDULE); } EXPORT_SYMBOL_GPL(arch_smp_send_reschedule); + +static void riscv_backtrace_ipi(cpumask_t *mask) +{ + send_ipi_mask(mask, IPI_CPU_BACKTRACE); +} + +void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu) +{ + nmi_trigger_cpumask_backtrace(mask, exclude_cpu, riscv_backtrace_ipi); +} |