[PATCH v3 1/9] drivers/perf: riscv: Add SBI v3.0 flag

[Anup Patel]

On Fri, May 23, 2025 at 12:33 AM Atish Patra <atishp at rivosinc.com> wrote:
>
> There are new PMU related features introduced in SBI v3.0.
> 1. Raw Event v2 which allows mhpmeventX value to be 56 bit wide.
> 2. Get Event info function to do a bulk query at one shot.
>
> Signed-off-by: Atish Patra <atishp at rivosinc.com>

LGTM.

Reviewed-by: Anup Patel <anup at brainfault.org>

Regards,
Anup

> ---
>  drivers/perf/riscv_pmu_sbi.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
> index 698de8ddf895..cfd6946fca42 100644
> --- a/drivers/perf/riscv_pmu_sbi.c
> +++ b/drivers/perf/riscv_pmu_sbi.c
> @@ -63,6 +63,7 @@ PMU_FORMAT_ATTR(event, "config:0-47");
>  PMU_FORMAT_ATTR(firmware, "config:62-63");
>
>  static bool sbi_v2_available;
> +static bool sbi_v3_available;
>  static DEFINE_STATIC_KEY_FALSE(sbi_pmu_snapshot_available);
>  #define sbi_pmu_snapshot_available() \
>         static_branch_unlikely(&sbi_pmu_snapshot_available)
> @@ -1452,6 +1453,9 @@ static int __init pmu_sbi_devinit(void)
>         if (sbi_spec_version >= sbi_mk_version(2, 0))
>                 sbi_v2_available = true;
>
> +       if (sbi_spec_version >= sbi_mk_version(3, 0))
> +               sbi_v3_available = true;
> +
>         ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_RISCV_STARTING,
>                                       "perf/riscv/pmu:starting",
>                                       pmu_sbi_starting_cpu, pmu_sbi_dying_cpu);
>
> --
> 2.43.0
>