Commit-ID: 8482716b9d865db34c55d4bf2fed19498e7195b9
Gitweb: http://git.kernel.org/tip/8482716b9d865db34c55d4bf2fed19498e7195b9
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Sun, 24 Apr 2016 00:42:55 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Thu, 5 May 2016 10:11:28 +0200
perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
The new sanity check introduced by:
26657848502b ("perf/core: Verify we have a single perf_hw_context PMU")
... triggered on the AMD IOMMU driver.
IOMMUs are not per logical CPU, they cannot have per-task counters. Fix it.
Reported-by: Borislav Petkov <bp@xxxxxxxxx>
Tested-by: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vince Weaver <vincent.weaver@xxxxxxxxx>
Cc: jroedel@xxxxxxx
Cc: suravee.suthikulpanit@xxxxxxx
Link: http://lkml.kernel.org/r/20160423224255.GB3430@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/events/amd/iommu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index 40625ca..6011a57 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -474,6 +474,7 @@ static __init int _init_perf_amd_iommu(
static struct perf_amd_iommu __perf_iommu = {
.pmu = {
+ .task_ctx_nr = perf_invalid_context,
.event_init = perf_iommu_event_init,
.add = perf_iommu_add,
.del = perf_iommu_del,
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|