Re: [PATCH 2/2] drivers: perf: added capabilities for legacy PMU

[Atish Patra]

On Tue, Dec 5, 2023 at 1:26 AM Vadim Shakirov
<vadim.shakirov@xxxxxxxxxxxxx> wrote:
>
> Added the PERF_PMU_CAP_NO_INTERRUPT flag because the legacy pmu driver
> does not provide sampling capabilities
>
> Added the PERF_PMU_CAP_NO_EXCLUDE flag because the legacy pmu driver
> does not provide the ability to disable counter incrementation in
> different privilege modes
>
> Suggested-by: Atish Patra <atishp@xxxxxxxxxxxxxx>
> Signed-off-by: Vadim Shakirov <vadim.shakirov@xxxxxxxxxxxxx>
> ---
>  drivers/perf/riscv_pmu_legacy.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/perf/riscv_pmu_legacy.c b/drivers/perf/riscv_pmu_legacy.c
> index a179ed6ac980..fa0bccf4edf2 100644
> --- a/drivers/perf/riscv_pmu_legacy.c
> +++ b/drivers/perf/riscv_pmu_legacy.c
> @@ -123,6 +123,8 @@ static void pmu_legacy_init(struct riscv_pmu *pmu)
>         pmu->event_mapped = pmu_legacy_event_mapped;
>         pmu->event_unmapped = pmu_legacy_event_unmapped;
>         pmu->csr_index = pmu_legacy_csr_index;
> +       pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
> +       pmu->pmu.capabilities |= PERF_PMU_CAP_NO_EXCLUDE;
>
>         perf_pmu_register(&pmu->pmu, "cpu", PERF_TYPE_RAW);
>  }
> --
> 2.34.1
>

Reviewed-by: Atish Patra <atishp@xxxxxxxxxxxx>

-- 
Regards,
Atish