perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
authorPeter Zijlstra <peterz@infradead.org>
Sat, 23 Apr 2016 22:42:55 +0000 (00:42 +0200)
committerIngo Molnar <mingo@kernel.org>
Thu, 5 May 2016 08:11:28 +0000 (10:11 +0200)
commit8482716b9d865db34c55d4bf2fed19498e7195b9
treee6deb86e2422760a09ba227274e2faa36680c31f
parentcba1b3798e2c4c094f2079a0d4c1ba4ec2c5a9ac
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@alien8.de>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: jroedel@suse.de
Cc: suravee.suthikulpanit@amd.com
Link: http://lkml.kernel.org/r/20160423224255.GB3430@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/events/amd/iommu.c