drivers/perf: riscv: Add SBI v3.0 flag

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.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Acked-by: Paul Walmsley <pjw@kernel.org>
Link: https://lore.kernel.org/r/20250909-pmu_event_info-v6-1-d8f80cacb884@rivosinc.com
Signed-off-by: Anup Patel <anup@brainfault.org>

diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 698de8ddf895ba8528c1b0acb5220d157f5f89a1..cfd6946fca42e6cfe0623926764f6bbede1fddcc 100644 (file)
--- 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);