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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-11-23 17:42:34 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-23 20:18:31 +0300 |
| commit | f5ffe02e5046003ae7e2ce70d3d1c2a73331268b (patch) | |
| tree | ed300505d80941e2ea95746f65a1b9eacfd4562f /kernel/perf_event.c | |
| parent | fdf6bc95229821e3d9405eba28925b76e92b74d0 (diff) | |
| download | linux-f5ffe02e5046003ae7e2ce70d3d1c2a73331268b.tar.xz | |
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: Frederic 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: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
| -rw-r--r-- | kernel/perf_event.c | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 0aafe85362fd..9425c9600c89 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -3831,6 +3831,20 @@ static int perf_swevent_is_counting(struct perf_event *event) static int perf_tp_event_match(struct perf_event *event, 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, enum perf_type_id type, u32 event_id, @@ -3842,16 +3856,12 @@ static int perf_swevent_match(struct perf_event *event, if (event->attr.type != type) return 0; + if (event->attr.config != event_id) return 0; - if (regs) { - if (event->attr.exclude_user && user_mode(regs)) - return 0; - - if (event->attr.exclude_kernel && !user_mode(regs)) - return 0; - } + if (perf_exclude_event(event, regs)) + return 0; if (event->attr.type == PERF_TYPE_TRACEPOINT && !perf_tp_event_match(event, data)) @@ -4282,9 +4292,15 @@ static const struct pmu *bp_perf_event_init(struct perf_event *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 static void bp_perf_event_destroy(struct perf_event *event) |