Messages in this thread Patch in this message | | | Date | Wed, 19 Aug 2020 08:52:09 -0000 | From | "tip-bot2 for Kan Liang" <> | Subject | [tip: perf/core] perf/x86/intel: Move BTS index to 47 |
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The following commit has been merged into the perf/core branch of tip:
Commit-ID: d39fcc32893dac2d02900d99c38276a00cc54d60 Gitweb: https://git.kernel.org/tip/d39fcc32893dac2d02900d99c38276a00cc54d60 Author: Kan Liang <kan.liang@linux.intel.com> AuthorDate: Thu, 23 Jul 2020 10:11:07 -07:00 Committer: Peter Zijlstra <peterz@infradead.org> CommitterDate: Tue, 18 Aug 2020 16:34:35 +02:00
perf/x86/intel: Move BTS index to 47
The bit 48 in the PERF_GLOBAL_STATUS is used to indicate the overflow status of the PERF_METRICS counters.
Move the BTS index to the bit 47.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200723171117.9918-5-kan.liang@linux.intel.com --- arch/x86/include/asm/perf_event.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index fe8110a..58419e5 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -238,11 +238,11 @@ struct x86_pmu_capability { /* * We model BTS tracing as another fixed-mode PMC. * - * We choose a value in the middle of the fixed event range, since lower + * We choose the value 47 for the fixed index of BTS, since lower * values are used by actual fixed events and higher values are used * to indicate other overflow conditions in the PERF_GLOBAL_STATUS msr. */ -#define INTEL_PMC_IDX_FIXED_BTS (INTEL_PMC_IDX_FIXED + 16) +#define INTEL_PMC_IDX_FIXED_BTS (INTEL_PMC_IDX_FIXED + 15) #define GLOBAL_STATUS_COND_CHG BIT_ULL(63) #define GLOBAL_STATUS_BUFFER_OVF_BIT 62
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