diff options
Diffstat (limited to 'arch/ia64/kernel/smp.c')
| -rw-r--r-- | arch/ia64/kernel/smp.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c index 657ac99a451c..b1b9aa4364b9 100644 --- a/arch/ia64/kernel/smp.c +++ b/arch/ia64/kernel/smp.c @@ -30,6 +30,7 @@ #include <linux/delay.h> #include <linux/efi.h> #include <linux/bitops.h> +#include <linux/kexec.h> #include <asm/atomic.h> #include <asm/current.h> @@ -66,6 +67,7 @@ static volatile struct call_data_struct *call_data; #define IPI_CALL_FUNC 0 #define IPI_CPU_STOP 1 +#define IPI_KDUMP_CPU_STOP 3 /* This needs to be cacheline aligned because it is written to by *other* CPUs. */ static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned; @@ -108,7 +110,7 @@ cpu_die(void) } irqreturn_t -handle_IPI (int irq, void *dev_id, struct pt_regs *regs) +handle_IPI (int irq, void *dev_id) { int this_cpu = get_cpu(); unsigned long *pending_ipis = &__ia64_per_cpu_var(ipi_operation); @@ -155,7 +157,11 @@ handle_IPI (int irq, void *dev_id, struct pt_regs *regs) case IPI_CPU_STOP: stop_this_cpu(); break; - +#ifdef CONFIG_CRASH_DUMP + case IPI_KDUMP_CPU_STOP: + unw_init_running(kdump_cpu_freeze, NULL); + break; +#endif default: printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which); break; @@ -213,6 +219,26 @@ send_IPI_self (int op) send_IPI_single(smp_processor_id(), op); } +#ifdef CONFIG_CRASH_DUMP +void +kdump_smp_send_stop() +{ + send_IPI_allbutself(IPI_KDUMP_CPU_STOP); +} + +void +kdump_smp_send_init() +{ + unsigned int cpu, self_cpu; + self_cpu = smp_processor_id(); + for_each_online_cpu(cpu) { + if (cpu != self_cpu) { + if(kdump_status[cpu] == 0) + platform_send_ipi(cpu, 0, IA64_IPI_DM_INIT, 0); + } + } +} +#endif /* * Called with preeemption disabled. */ @@ -328,10 +354,14 @@ int smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wait) { struct call_data_struct data; - int cpus = num_online_cpus()-1; + int cpus; - if (!cpus) + spin_lock(&call_lock); + cpus = num_online_cpus() - 1; + if (!cpus) { + spin_unlock(&call_lock); return 0; + } /* Can deadlock when called with interrupts disabled */ WARN_ON(irqs_disabled()); @@ -343,8 +373,6 @@ smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wai if (wait) atomic_set(&data.finished, 0); - spin_lock(&call_lock); - call_data = &data; mb(); /* ensure store to call_data precedes setting of IPI_CALL_FUNC */ send_IPI_allbutself(IPI_CALL_FUNC); |