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-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_ds.c8
-rw-r--r--arch/x86/power/cpu.c2
-rw-r--r--include/linux/perf_event.h2
3 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index d812fe2..cf82ee5 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -754,6 +754,14 @@ static void intel_ds_init(void)
}
}
+void perf_restore_debug_store(void)
+{
+ if (!x86_pmu.bts && !x86_pmu.pebs)
+ return;
+
+ init_debug_store_on_cpu(smp_processor_id());
+}
+
#else /* CONFIG_CPU_SUP_INTEL */
static void reserve_ds_buffers(void)
diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
index 87bb35e..0ea8bd2 100644
--- a/arch/x86/power/cpu.c
+++ b/arch/x86/power/cpu.c
@@ -10,6 +10,7 @@
#include <linux/suspend.h>
#include <linux/smp.h>
+#include <linux/perf_event.h>
#include <asm/pgtable.h>
#include <asm/proto.h>
@@ -224,6 +225,7 @@ static void __restore_processor_state(struct saved_context *ctxt)
do_fpu_end();
mtrr_bp_restore();
+ perf_restore_debug_store();
}
/* Needed by apm.c */
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index effadd6..038ad4a 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1153,6 +1153,7 @@ extern void perf_swevent_put_recursion_context(int rctx);
extern void perf_event_enable(struct perf_event *event);
extern void perf_event_disable(struct perf_event *event);
extern void perf_event_task_tick(void);
+extern void perf_restore_debug_store(void);
#else
static inline void
perf_event_task_sched_in(struct task_struct *task) { }
@@ -1187,6 +1188,7 @@ static inline void perf_swevent_put_recursion_context(int rctx) { }
static inline void perf_event_enable(struct perf_event *event) { }
static inline void perf_event_disable(struct perf_event *event) { }
static inline void perf_event_task_tick(void) { }
+static inline void perf_restore_debug_store(void) { }
#endif
#define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))