aboutsummaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorAtish Patra <atishp@rivosinc.com>2022-07-11 10:46:28 -0700
committerPalmer Dabbelt <palmer@rivosinc.com>2022-08-11 14:58:07 -0700
commitacc1b919f47926b089be21b8aaa29ec91fef0aa2 (patch)
tree11058347c96ea9e53bac3d4a107478b36e1677af /drivers
parentf2906aa863381afb0015a9eb7fefad885d4e5a56 (diff)
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')
-rw-r--r--drivers/perf/riscv_pmu_sbi.c5
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++;

Privacy Policy