diff options
| author | Atish Patra <atishp@rivosinc.com> | 2022-07-11 20:46:28 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-08-12 00:58:07 +0300 |
| commit | acc1b919f47926b089be21b8aaa29ec91fef0aa2 (patch) | |
| tree | 11058347c96ea9e53bac3d4a107478b36e1677af /drivers/perf | |
| parent | f2906aa863381afb0015a9eb7fefad885d4e5a56 (diff) | |
| download | linux-acc1b919f47926b089be21b8aaa29ec91fef0aa2.tar.xz | |
RISC-V: Fix counter restart during overflow for RV32
Pass the upper half of the initial value of the counter correctly
for RV32.
Fixes: 4905ec2fb7e6 ("RISC-V: Add sscofpmf extension support")
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220711174632.4186047-2-atishp@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/riscv_pmu_sbi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index dca3537a8dcc..0cb694b794ae 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -525,8 +525,13 @@ static inline void pmu_sbi_start_overflow_mask(struct riscv_pmu *pmu, hwc = &event->hw; max_period = riscv_pmu_ctr_get_width_mask(event); init_val = local64_read(&hwc->prev_count) & max_period; +#if defined(CONFIG_32BIT) + sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1, + flag, init_val, init_val >> 32, 0); +#else sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1, flag, init_val, 0, 0); +#endif } ctr_ovf_mask = ctr_ovf_mask >> 1; idx++; |