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| author |   Robert Richter <robert.richter@amd.com> | 2012-06-15 19:06:44 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2012-06-18 11:14:35 +0200 |
| commit | 76958a61e42fb6277a8431eb17e4bdb24176f1b7 (patch) | |
| tree | bac2ee9edf3ebc32d2f1594cb873aa2f67431d3d /kernel | |
| parent | Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core (diff) | |
| download | linux-dev-76958a61e42fb6277a8431eb17e4bdb24176f1b7.tar.xz linux-dev-76958a61e42fb6277a8431eb17e4bdb24176f1b7.zip | |
perf/x86/amd: Fix RDPMC index calculation for AMD family 15h
The RDPMC index calculation is wrong for AMD family 15h
(X86_FEATURE_ PERFCTR_CORE set). This leads to a #GP when
accessing the counter:
Pid: 2237, comm: syslog-ng Not tainted 3.5.0-rc1-perf-x86_64-standard-g130ff90 #135 AMD Pike/Pike
RIP: 0010:[<ffffffff8100dc33>] [<ffffffff8100dc33>] x86_perf_event_update+0x27/0x66
While the msr address offset is (index << 1) we must use index to
select the correct rdpmc.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Vince Weaver <vweaver1@eecs.utk.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions