diff options
Diffstat (limited to 'arch/x86/events/intel/lbr.c')
| -rw-r--r-- | arch/x86/events/intel/lbr.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c index 65113b16804a..2ed3f2a51bdf 100644 --- a/arch/x86/events/intel/lbr.c +++ b/arch/x86/events/intel/lbr.c @@ -1343,3 +1343,23 @@ void intel_pmu_lbr_init_knl(void) if (x86_pmu.intel_cap.lbr_format == LBR_FORMAT_LIP) x86_pmu.intel_cap.lbr_format = LBR_FORMAT_EIP_FLAGS; } + +/** + * x86_perf_get_lbr - get the LBR records information + * + * @lbr: the caller's memory to store the LBR records information + * + * Returns: 0 indicates the LBR info has been successfully obtained + */ +int x86_perf_get_lbr(struct x86_pmu_lbr *lbr) +{ + int lbr_fmt = x86_pmu.intel_cap.lbr_format; + + lbr->nr = x86_pmu.lbr_nr; + lbr->from = x86_pmu.lbr_from; + lbr->to = x86_pmu.lbr_to; + lbr->info = (lbr_fmt == LBR_FORMAT_INFO) ? MSR_LBR_INFO_0 : 0; + + return 0; +} +EXPORT_SYMBOL_GPL(x86_perf_get_lbr); |