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SubjectRe: [PATCH RESEND V5 5/6] perf, x86: Allow for architecture specific RDPMC indexes
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On Thu, Jan 10, 2013 at 8:50 PM, Jacob Shin <jacob.shin@amd.com> wrote:
> Similar to config_base and event_base, allow architecture specific
> RDPMC ECX values.
>
> Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Acked-by: Stephane Eranian <eranian@google.com>

> ---
> arch/x86/kernel/cpu/perf_event.c | 2 +-
> arch/x86/kernel/cpu/perf_event.h | 6 ++++++
> arch/x86/kernel/cpu/perf_event_amd.c | 6 ++++++
> 3 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
> index 4428fd1..b63982b 100644
> --- a/arch/x86/kernel/cpu/perf_event.c
> +++ b/arch/x86/kernel/cpu/perf_event.c
> @@ -835,7 +835,7 @@ static inline void x86_assign_hw_event(struct perf_event *event,
> } else {
> hwc->config_base = x86_pmu_config_addr(hwc->idx);
> hwc->event_base = x86_pmu_event_addr(hwc->idx);
> - hwc->event_base_rdpmc = hwc->idx;
> + hwc->event_base_rdpmc = x86_pmu_rdpmc_index(hwc->idx);
> }
> }
>
> diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
> index 4440218..c910657 100644
> --- a/arch/x86/kernel/cpu/perf_event.h
> +++ b/arch/x86/kernel/cpu/perf_event.h
> @@ -326,6 +326,7 @@ struct x86_pmu {
> unsigned eventsel;
> unsigned perfctr;
> int (*addr_offset)(int index, int eventsel);
> + int (*rdpmc_index)(int index);
> u64 (*event_map)(int);
> int max_events;
> int num_counters;
> @@ -459,6 +460,11 @@ static inline unsigned int x86_pmu_event_addr(int index)
> (x86_pmu.addr_offset ? x86_pmu.addr_offset(index, 0) : index);
> }
>
> +static inline int x86_pmu_rdpmc_index(int index)
> +{
> + return x86_pmu.rdpmc_index ? x86_pmu.rdpmc_index(index) : index;
> +}
> +
> int x86_setup_perfctr(struct perf_event *event);
>
> int x86_pmu_hw_config(struct perf_event *event);
> diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
> index ef1df38..faf9072 100644
> --- a/arch/x86/kernel/cpu/perf_event_amd.c
> +++ b/arch/x86/kernel/cpu/perf_event_amd.c
> @@ -173,6 +173,11 @@ static inline int amd_pmu_addr_offset(int index, int eventsel)
> return offset;
> }
>
> +static inline int amd_pmu_rdpmc_index(int index)
> +{
> + return index;
> +}
> +
> static int amd_pmu_hw_config(struct perf_event *event)
> {
> int ret;
> @@ -620,6 +625,7 @@ static __initconst const struct x86_pmu amd_pmu = {
> .eventsel = MSR_K7_EVNTSEL0,
> .perfctr = MSR_K7_PERFCTR0,
> .addr_offset = amd_pmu_addr_offset,
> + .rdpmc_index = amd_pmu_rdpmc_index,
> .event_map = amd_pmu_event_map,
> .max_events = ARRAY_SIZE(amd_perfmon_event_map),
> .num_counters = AMD64_NUM_COUNTERS,
> --
> 1.7.9.5
>
>


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