Commit f5ffe02e authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Ingo Molnar

perf: Add kernel side syscall events support for breakpoints

Add the remaining necessary bits to support breakpoints created
through perf syscall.

We don't use the software counter interface as:

- We don't need to check against recursion, this is already done
  in hardware breakpoints arch level.

- We already know the perf event we are dealing with when the
  event is to be committed.
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Prasad <prasad@linux.vnet.ibm.com>
LKML-Reference: <1258987355-8751-3-git-send-email-fweisbec@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent fdf6bc95
...@@ -3831,6 +3831,20 @@ static int perf_swevent_is_counting(struct perf_event *event) ...@@ -3831,6 +3831,20 @@ static int perf_swevent_is_counting(struct perf_event *event)
static int perf_tp_event_match(struct perf_event *event, static int perf_tp_event_match(struct perf_event *event,
struct perf_sample_data *data); struct perf_sample_data *data);
static int perf_exclude_event(struct perf_event *event,
struct pt_regs *regs)
{
if (regs) {
if (event->attr.exclude_user && user_mode(regs))
return 1;
if (event->attr.exclude_kernel && !user_mode(regs))
return 1;
}
return 0;
}
static int perf_swevent_match(struct perf_event *event, static int perf_swevent_match(struct perf_event *event,
enum perf_type_id type, enum perf_type_id type,
u32 event_id, u32 event_id,
...@@ -3842,16 +3856,12 @@ static int perf_swevent_match(struct perf_event *event, ...@@ -3842,16 +3856,12 @@ static int perf_swevent_match(struct perf_event *event,
if (event->attr.type != type) if (event->attr.type != type)
return 0; return 0;
if (event->attr.config != event_id) if (event->attr.config != event_id)
return 0; return 0;
if (regs) { if (perf_exclude_event(event, regs))
if (event->attr.exclude_user && user_mode(regs)) return 0;
return 0;
if (event->attr.exclude_kernel && !user_mode(regs))
return 0;
}
if (event->attr.type == PERF_TYPE_TRACEPOINT && if (event->attr.type == PERF_TYPE_TRACEPOINT &&
!perf_tp_event_match(event, data)) !perf_tp_event_match(event, data))
...@@ -4282,9 +4292,15 @@ static const struct pmu *bp_perf_event_init(struct perf_event *bp) ...@@ -4282,9 +4292,15 @@ static const struct pmu *bp_perf_event_init(struct perf_event *bp)
return &perf_ops_bp; return &perf_ops_bp;
} }
void perf_bp_event(struct perf_event *bp, void *regs) void perf_bp_event(struct perf_event *bp, void *data)
{ {
/* TODO */ struct perf_sample_data sample;
struct pt_regs *regs = data;
sample.addr = bp->attr.bp_addr;
if (!perf_exclude_event(bp, regs))
perf_swevent_add(bp, 1, 1, &sample, regs);
} }
#else #else
static void bp_perf_event_destroy(struct perf_event *event) static void bp_perf_event_destroy(struct perf_event *event)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment