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

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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>
This commit is contained in:
Atish Patra
2025-09-09 00:03:20 -07:00
committed by Anup Patel
parent 5c6d333a9e
commit 8c8d0f002b
1 changed files with 4 additions and 0 deletions
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4
drivers/perf/riscv_pmu_sbi.c
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@@ -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);