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Diffstat (limited to 'arch/ia64/kernel/smp.c')
-rw-r--r--arch/ia64/kernel/smp.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 6ab95ceaf9d..b1b9aa4364b 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;
@@ -155,7 +157,11 @@ handle_IPI (int irq, void *dev_id)
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.
*/