From: Michael Ellerman <mpe@ellerman.id.au>
To: <linuxppc-dev@ozlabs.org>
Cc: cody@linux.vnet.ibm.com, khandual@linux.vnet.ibm.com
Subject: [PATCH 05/20] powerpc/perf: Reject EBB events which specify a sample_type
Date: Fri, 14 Mar 2014 16:00:30 +1100 [thread overview]
Message-ID: <1394773245-18328-6-git-send-email-mpe@ellerman.id.au> (raw)
In-Reply-To: <1394773245-18328-1-git-send-email-mpe@ellerman.id.au>
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>
---
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
next prev parent reply other threads:[~2014-03-14 5:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-14 5:00 powerpc/perf: patches for 3.15 Michael Ellerman
2014-03-14 5:00 ` [PATCH 01/20] powerpc/perf: Make some new raw event codes available in sysfs Michael Ellerman
2014-03-14 5:00 ` [PATCH 02/20] powerpc/perf: Define perf_event_print_debug() to print PMU register values Michael Ellerman
2014-03-14 5:00 ` [PATCH 03/20] powerpc: Add a cpu feature CPU_FTR_PMAO_BUG Michael Ellerman
2014-03-14 5:00 ` [PATCH 04/20] powerpc/perf: Add lost exception workaround Michael Ellerman
2014-03-14 5:00 ` Michael Ellerman [this message]
2014-03-14 5:00 ` [PATCH 06/20] powerpc/perf: Clean up the EBB hash defines a little Michael Ellerman
2014-03-14 5:00 ` [PATCH 07/20] powerpc/perf: Avoid mutating event in power8_get_constraint() Michael Ellerman
2014-03-14 5:00 ` [PATCH 08/20] powerpc/perf: Add BHRB constraint and IFM MMCRA handling for EBB Michael Ellerman
2014-03-14 5:00 ` [PATCH 09/20] powerpc/perf: Enable BHRB access for EBB events Michael Ellerman
2014-03-14 5:00 ` [PATCH 10/20] sysfs: create bin_attributes under the requested group Michael Ellerman
2014-03-14 5:00 ` [PATCH 11/20] powerpc: Add hvcalls for 24x7 and gpci (Get Performance Counter Info) Michael Ellerman
2014-03-14 5:00 ` [PATCH 12/20] powerpc/perf: Add hv_gpci interface header Michael Ellerman
2014-03-14 5:00 ` [PATCH 13/20] powerpc/perf: Add 24x7 interface headers Michael Ellerman
2014-03-14 5:00 ` [PATCH 14/20] powerpc/perf: Add a shared interface to get gpci version and capabilities Michael Ellerman
2014-03-14 5:00 ` [PATCH 15/20] powerpc/perf: Add macros for defining event fields & formats Michael Ellerman
2014-03-14 5:00 ` [PATCH 16/20] powerpc/perf: Add support for the hv gpci (get performance counter info) interface Michael Ellerman
2014-03-14 5:00 ` [PATCH 17/20] powerpc/perf: Add support for the hv 24x7 interface Michael Ellerman
2014-03-14 5:00 ` [PATCH 18/20] powerpc/perf: Add kconfig option for hypervisor provided counters Michael Ellerman
2014-03-14 5:00 ` [PATCH 19/20] powerpc/perf/hv_{gpci, 24x7}: Add documentation of device attributes Michael Ellerman
2014-03-14 5:00 ` [PATCH 20/20] powerpc/perf: Fix handling of L3 events with bank == 1 Michael Ellerman
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