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| author | Kan Liang <kan.liang@intel.com> | 2016-04-21 11:30:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-28 10:32:43 +0200 |
| commit | cf3beb7c90a8efa16a06b26634cddddc92bb819c (patch) | |
| tree | 8cb7d0af1c321b95254c0371cf1fbc4c6f473894 /kernel/events | |
| parent | perf/x86/intel/pt: Don't die on VMXON (diff) | |
| download | linux-cf3beb7c90a8efa16a06b26634cddddc92bb819c.tar.xz linux-cf3beb7c90a8efa16a06b26634cddddc92bb819c.zip | |
perf/x86/intel: Fix incorrect lbr_sel_mask value
This patch fixes a bug which was introduced by:
b16a5b52eb90 ("perf/x86: Add option to disable reading branch flags/cycles")
In this patch, lbr_sel_mask is used to mask the lbr_select. But LBR_SEL_MASK
doesn't include the bit for LBR_CALL_STACK. So LBR call stack will never be
set in lbr_select.
This patch corrects the LBR_SEL_MASK by including all valid bits in
LBR_SELECT. Also, the LBR_CALL_STACK bit is different as other bit in
LBR_SELECT. It does not operate in suppress mode, so it needs to be
specially handled in intel_pmu_setup_hw_lbr_filter.
Signed-off-by: Kan Liang <kan.liang@intel.com>
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: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1461231010-4399-1-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
0 files changed, 0 insertions, 0 deletions