The AMD perf-counters support counting in guest or host-mode only. Make use of that feature when user-space specified guest/host-mode only counting. Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx> --- arch/x86/include/asm/perf_event.h | 3 +++ arch/x86/kernel/cpu/perf_event_amd.c | 6 ++++++ 2 files changed, 9 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index d9d4dae..34047c2 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -29,6 +29,9 @@ #define ARCH_PERFMON_EVENTSEL_INV (1ULL << 23) #define ARCH_PERFMON_EVENTSEL_CMASK 0xFF000000ULL +#define AMD_PERFMON_EVENTSEL_GUESTONLY (1ULL << 40) +#define AMD_PERFMON_EVENTSEL_HOSTONLY (1ULL << 41) + #define AMD64_EVENTSEL_EVENT \ (ARCH_PERFMON_EVENTSEL_EVENT | (0x0FULL << 32)) #define INTEL_ARCH_EVENT_MASK \ diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c index cf4e369..afc21f3 100644 --- a/arch/x86/kernel/cpu/perf_event_amd.c +++ b/arch/x86/kernel/cpu/perf_event_amd.c @@ -116,6 +116,12 @@ static int amd_pmu_hw_config(struct perf_event *event) if (ret) return ret; + if (event->attr.exclude_host) + event->hw.config |= AMD_PERFMON_EVENTSEL_GUESTONLY; + + if (event->attr.exclude_guest) + event->hw.config |= AMD_PERFMON_EVENTSEL_HOSTONLY; + if (event->attr.type != PERF_TYPE_RAW) return 0; -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
