diff options
author | Michael Ellerman <mpe@ellerman.id.au> | 2014-03-14 05:00:30 (GMT) |
---|---|---|
committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-03-23 22:48:25 (GMT) |
commit | 58b5fb00498ddaaa3f6582751e9eb731189ee4c8 (patch) | |
tree | 211bd7f808e0c8ce824232a43d5641f0d878af65 /arch | |
parent | c2e37a2626a7471875f3a6452b99dfd3809972b9 (diff) | |
download | linux-58b5fb00498ddaaa3f6582751e9eb731189ee4c8.tar.xz |
powerpc/perf: Reject EBB events which specify a sample_type
Although we already block EBB events which request sampling using
sample_period, technically it's possible for an event to set sample_type
but not sample_period.
Nothing terrible will happen if an EBB event does specify sample_type,
but it signals a major confusion on the part of userspace, and so we do
them the favor of rejecting it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/perf/core-book3s.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index 53ac1b2..1e095fd 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -503,8 +503,11 @@ static int ebb_event_check(struct perf_event *event) if (!leader->attr.pinned || !leader->attr.exclusive) return -EINVAL; - if (event->attr.inherit || event->attr.sample_period || - event->attr.enable_on_exec || event->attr.freq) + if (event->attr.freq || + event->attr.inherit || + event->attr.sample_type || + event->attr.sample_period || + event->attr.enable_on_exec) return -EINVAL; } |