From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Michael Ellerman To: Subject: [PATCH 05/20] powerpc/perf: Reject EBB events which specify a sample_type Date: Fri, 14 Mar 2014 16:00:30 +1100 Message-Id: <1394773245-18328-6-git-send-email-mpe@ellerman.id.au> In-Reply-To: <1394773245-18328-1-git-send-email-mpe@ellerman.id.au> References: <1394773245-18328-1-git-send-email-mpe@ellerman.id.au> Cc: cody@linux.vnet.ibm.com, khandual@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- arch/powerpc/perf/core-book3s.c | 7 +++++-- 1 file 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; } -- 1.8.3.2