[PATCH v6 1/8] drivers/perf: riscv: Add SBI v3.0 flag
From: Atish Patra <hidden>
Date: 2025-09-09 07:03:26
Also in:
kvm, kvm-riscv, linux-riscv, lkml
Subsystem:
arm pmu profiling and debugging, risc-v pmu drivers, the rest · Maintainers:
Will Deacon, Mark Rutland, Atish Patra, Linus Torvalds
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 <redacted> --- 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