Hi Shannon, Still picking up on details... On 22/02/16 09:37, Shannon Zhao wrote: > From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> > > When we use tools like perf on host, perf passes the event type and the > id of this event type category to kernel, then kernel will map them to > hardware event number and write this number to PMU PMEVTYPER<n>_EL0 > register. When getting the event number in KVM, directly use raw event > type to create a perf_event for it. > > Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> > Reviewed-by: Marc Zyngier <marc.zyngier@xxxxxxx> > --- > arch/arm64/include/asm/perf_event.h | 2 + > arch/arm64/kvm/Makefile | 1 + > include/kvm/arm_pmu.h | 12 ++++ > virt/kvm/arm/pmu.c | 122 ++++++++++++++++++++++++++++++++++++ > 4 files changed, 137 insertions(+) > create mode 100644 virt/kvm/arm/pmu.c > > diff --git a/arch/arm64/include/asm/perf_event.h b/arch/arm64/include/asm/perf_event.h > index 5c77ef8..867140d 100644 > --- a/arch/arm64/include/asm/perf_event.h > +++ b/arch/arm64/include/asm/perf_event.h > @@ -29,6 +29,8 @@ > #define ARMV8_PMU_PMCR_D (1 << 3) /* CCNT counts every 64th cpu cycle */ > #define ARMV8_PMU_PMCR_X (1 << 4) /* Export to ETM */ > #define ARMV8_PMU_PMCR_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ > +/* Determines which bit of PMCCNTR_EL0 generates an overflow */ > +#define ARMV8_PMU_PMCR_LC (1 << 6) nit: this #define is only being used in patch #14. Consider moving it there... Thanks, M. -- Jazz is not dead. It just smells funny... -- 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
