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| author | Sergey Matyukevich <sergey.matyukevich@syntacore.com> | 2022-08-30 18:53:05 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-09-08 13:34:50 -0700 |
| commit | 1537bf26e212ffcf007d0590958025f6bfdd4ac8 (patch) | |
| tree | b2a498f8d14239173d11ee1a97a7911b356504e9 /drivers/perf/riscv_pmu_legacy.c | |
| parent | 82c75dca6f95c9ac4649031a493456156ddfec2f (diff) | |
| download | linux-1537bf26e212ffcf007d0590958025f6bfdd4ac8.tar.gz linux-1537bf26e212ffcf007d0590958025f6bfdd4ac8.tar.bz2 linux-1537bf26e212ffcf007d0590958025f6bfdd4ac8.zip | |
perf: RISC-V: exclude invalid pmu counters from SBI calls
SBI firmware may not provide information for some counters in response
to SBI_EXT_PMU_COUNTER_GET_INFO call. Exclude such counters from the
subsequent SBI requests. For this purpose use global mask to keep track
of fully specified counters.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@syntacore.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220830155306.301714-3-geomatsi@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'drivers/perf/riscv_pmu_legacy.c')
| -rw-r--r-- | drivers/perf/riscv_pmu_legacy.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/perf/riscv_pmu_legacy.c b/drivers/perf/riscv_pmu_legacy.c index 342778782359..7d7131c47bc0 100644 --- a/drivers/perf/riscv_pmu_legacy.c +++ b/drivers/perf/riscv_pmu_legacy.c @@ -14,7 +14,6 @@ #define RISCV_PMU_LEGACY_CYCLE 0 #define RISCV_PMU_LEGACY_INSTRET 1 -#define RISCV_PMU_LEGACY_NUM_CTR 2 static bool pmu_init_done; @@ -83,7 +82,8 @@ static void pmu_legacy_init(struct riscv_pmu *pmu) { pr_info("Legacy PMU implementation is available\n"); - pmu->num_counters = RISCV_PMU_LEGACY_NUM_CTR; + pmu->cmask = BIT(RISCV_PMU_LEGACY_CYCLE) | + BIT(RISCV_PMU_LEGACY_INSTRET); pmu->ctr_start = pmu_legacy_ctr_start; pmu->ctr_stop = NULL; pmu->event_map = pmu_legacy_event_map; |