diff options
| author | Besar Wicaksono <bwicaksono@nvidia.com> | 2024-10-31 14:21:18 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-12-09 15:07:49 +0000 |
| commit | bce61d5c57647ca4565847217fe811260cc60173 (patch) | |
| tree | 86f8868a66cfbd217bfa6453a65a0a4d0ef35ec5 /drivers/perf | |
| parent | ca26df4b1036bcad326170a6ddb5245f6d6e8d82 (diff) | |
perf: arm_cspmu: nvidia: monitor all ports by default
Some NVIDIA PMUs like the NVLINK-C2C, CNVLINK, and PCIE PMU provide
port filtering. If the port filter is set to zero, the counter of
these PMUs will not capture any event. To avoid meaningless
experiment, the driver sets the port filter value to a default
non-zero value.
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Link: https://lore.kernel.org/r/20241031142118.1865965-5-bwicaksono@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/arm_cspmu/nvidia_cspmu.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/perf/arm_cspmu/nvidia_cspmu.c b/drivers/perf/arm_cspmu/nvidia_cspmu.c index 7ab7d76e4ca1..8116c7846a46 100644 --- a/drivers/perf/arm_cspmu/nvidia_cspmu.c +++ b/drivers/perf/arm_cspmu/nvidia_cspmu.c @@ -175,10 +175,12 @@ static u32 nv_cspmu_event_filter(const struct perf_event *event) const struct nv_cspmu_ctx *ctx = to_nv_cspmu_ctx(to_arm_cspmu(event->pmu)); - if (ctx->filter_mask == 0) + const u32 filter_val = event->attr.config1 & ctx->filter_mask; + + if (filter_val == 0) return ctx->filter_default_val; - return event->attr.config1 & ctx->filter_mask; + return filter_val; } enum nv_cspmu_name_fmt { |