From: Kan Liang Date: Thu, 23 Jul 2020 17:11:07 +0000 (-0700) Subject: perf/x86/intel: Move BTS index to 47 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d39fcc32893dac2d02900d99c38276a00cc54d60;p=linux.git 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 Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20200723171117.9918-5-kan.liang@linux.intel.com --- diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index fe8110a8c75ba..58419e50ff989 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