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| author | Palmer Dabbelt <palmer@rivosinc.com> | 2023-11-09 06:44:13 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-11-09 06:44:13 -0800 |
| commit | 68444b93ed6c622f77745ea25f8db05cd0afb1b6 (patch) | |
| tree | 743ca5f9cd96e52db5c29f6e81141232ca435b5f /drivers/perf | |
| parent | c6e316ac05532febb0c966fa9b55f5258ed037be (diff) | |
| parent | 61e3d993c8bd3e80f8f1363ed5e04f88ab531b72 (diff) | |
| download | linux-stable-68444b93ed6c622f77745ea25f8db05cd0afb1b6.tar.gz linux-stable-68444b93ed6c622f77745ea25f8db05cd0afb1b6.tar.bz2 linux-stable-68444b93ed6c622f77745ea25f8db05cd0afb1b6.zip | |
Merge patch "drivers: perf: Do not broadcast to other cpus when starting a counter"
This is really just a single patch, but since the offending fix hasn't
yet made it to my for-next I'm merging it here.
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/riscv_pmu.c | 3 | ||||
| -rw-r--r-- | drivers/perf/riscv_pmu_sbi.c | 10 |
2 files changed, 8 insertions, 5 deletions
diff --git a/drivers/perf/riscv_pmu.c b/drivers/perf/riscv_pmu.c index 1f9a35f724f5..0dda70e1ef90 100644 --- a/drivers/perf/riscv_pmu.c +++ b/drivers/perf/riscv_pmu.c @@ -23,7 +23,8 @@ static bool riscv_perf_user_access(struct perf_event *event) return ((event->attr.type == PERF_TYPE_HARDWARE) || (event->attr.type == PERF_TYPE_HW_CACHE) || (event->attr.type == PERF_TYPE_RAW)) && - !!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT); + !!(event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT) && + (event->hw.idx != -1); } void arch_perf_update_userpage(struct perf_event *event, diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index 0b5053152ee6..cd8a2b9efd78 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -510,16 +510,18 @@ static void pmu_sbi_set_scounteren(void *arg) { struct perf_event *event = (struct perf_event *)arg; - csr_write(CSR_SCOUNTEREN, - csr_read(CSR_SCOUNTEREN) | (1 << pmu_sbi_csr_index(event))); + if (event->hw.idx != -1) + csr_write(CSR_SCOUNTEREN, + csr_read(CSR_SCOUNTEREN) | (1 << pmu_sbi_csr_index(event))); } static void pmu_sbi_reset_scounteren(void *arg) { struct perf_event *event = (struct perf_event *)arg; - csr_write(CSR_SCOUNTEREN, - csr_read(CSR_SCOUNTEREN) & ~(1 << pmu_sbi_csr_index(event))); + if (event->hw.idx != -1) + csr_write(CSR_SCOUNTEREN, + csr_read(CSR_SCOUNTEREN) & ~(1 << pmu_sbi_csr_index(event))); } static void pmu_sbi_ctr_start(struct perf_event *event, u64 ival) |