diff options
| -rw-r--r-- | arch/arm64/kernel/smp.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 800c59cf9b64..1a53e57c81d0 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -32,6 +32,7 @@ #include <linux/irq_work.h> #include <linux/kernel_stat.h> #include <linux/kexec.h> +#include <linux/kgdb.h> #include <linux/kvm_host.h> #include <linux/nmi.h> @@ -79,6 +80,7 @@ enum ipi_msg_type { * with trace_ipi_* */ IPI_CPU_BACKTRACE = NR_IPI, + IPI_KGDB_ROUNDUP, MAX_IPI }; @@ -868,6 +870,22 @@ void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu) nmi_trigger_cpumask_backtrace(mask, exclude_cpu, arm64_backtrace_ipi); } +#ifdef CONFIG_KGDB +void kgdb_roundup_cpus(void) +{ + int this_cpu = raw_smp_processor_id(); + int cpu; + + for_each_online_cpu(cpu) { + /* No need to roundup ourselves */ + if (cpu == this_cpu) + continue; + + __ipi_send_single(ipi_desc[IPI_KGDB_ROUNDUP], cpu); + } +} +#endif + /* * Main handler for inter-processor interrupts */ @@ -919,6 +937,10 @@ static void do_handle_IPI(int ipinr) nmi_cpu_backtrace(get_irq_regs()); break; + case IPI_KGDB_ROUNDUP: + kgdb_nmicallback(cpu, get_irq_regs()); + break; + default: pr_crit("CPU%u: Unknown IPI message 0x%x\n", cpu, ipinr); break; @@ -949,6 +971,7 @@ static bool ipi_should_be_nmi(enum ipi_msg_type ipi) case IPI_CPU_STOP: case IPI_CPU_CRASH_STOP: case IPI_CPU_BACKTRACE: + case IPI_KGDB_ROUNDUP: return true; default: return false; |