| commit | 76958a61e42fb6277a8431eb17e4bdb24176f1b7 | |
| author | Robert Richter <robert.richter@amd.com> | |
| Fri, 15 Jun 2012 17:06:44 +0000 (15 19:06 +0200) | ||
| committer | Ingo Molnar <mingo@kernel.org> | |
| Mon, 18 Jun 2012 09:14:35 +0000 (18 11:14 +0200) | ||
| tree | bac2ee9edf3ebc32d2f1594cb873aa2f67431d3d | treesnapshot (tar.gz zip) |
| parent | 4983955c049d1debe5f6bee3aeb54ff5942fcd39 | commitdiff |
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>
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>
| arch/x86/kernel/cpu/perf_event.c | diffblobblamehistory |