perf_counter: allow for data addresses to be recorded
Paul suggested we allow for data addresses to be recorded along with
the traditional IPs as power can provide these.
For now, only the software pagefault events provide data addresses,
but in the future power might as well for some events.
x86 doesn't seem capable of providing this atm.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090408130409.394816925@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 8bd1be5..c22363a 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -101,8 +101,9 @@
PERF_RECORD_IP = 1U << 0,
PERF_RECORD_TID = 1U << 1,
PERF_RECORD_TIME = 1U << 2,
- PERF_RECORD_GROUP = 1U << 3,
- PERF_RECORD_CALLCHAIN = 1U << 4,
+ PERF_RECORD_ADDR = 1U << 3,
+ PERF_RECORD_GROUP = 1U << 4,
+ PERF_RECORD_CALLCHAIN = 1U << 5,
};
/*
@@ -251,6 +252,7 @@
* { u64 ip; } && PERF_RECORD_IP
* { u32 pid, tid; } && PERF_RECORD_TID
* { u64 time; } && PERF_RECORD_TIME
+ * { u64 addr; } && PERF_RECORD_ADDR
*
* { u64 nr;
* { u64 event, val; } cnt[nr]; } && PERF_RECORD_GROUP
@@ -537,7 +539,7 @@
extern void perf_counter_update_userpage(struct perf_counter *counter);
extern int perf_counter_overflow(struct perf_counter *counter,
- int nmi, struct pt_regs *regs);
+ int nmi, struct pt_regs *regs, u64 addr);
/*
* Return 1 for a software counter, 0 for a hardware counter
*/
@@ -547,7 +549,7 @@
perf_event_type(&counter->hw_event) != PERF_TYPE_HARDWARE;
}
-extern void perf_swcounter_event(u32, u64, int, struct pt_regs *);
+extern void perf_swcounter_event(u32, u64, int, struct pt_regs *, u64);
extern void perf_counter_mmap(unsigned long addr, unsigned long len,
unsigned long pgoff, struct file *file);
@@ -584,8 +586,8 @@
static inline int perf_counter_task_enable(void) { return -EINVAL; }
static inline void
-perf_swcounter_event(u32 event, u64 nr, int nmi, struct pt_regs *regs) { }
-
+perf_swcounter_event(u32 event, u64 nr, int nmi,
+ struct pt_regs *regs, u64 addr) { }
static inline void
perf_counter_mmap(unsigned long addr, unsigned long len,