drivers/perf: hisi_pcie: Fix TLP headers bandwidth counting

[ Upstream commit 17bf68aeb3642221e3e770399b5a52f370747ac1 ]

We make the initial value of event ctrl register as HISI_PCIE_INIT_SET
and modify according to the user options. This will make TLP headers
bandwidth only counting never take effect since HISI_PCIE_INIT_SET
configures to count the TLP payloads bandwidth. Fix this by making
the initial value of event ctrl register as 0.

Fixes: 17d573984d4d ("drivers/perf: hisi: Add TLP filter support")
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240829090332.28756-3-yangyicong@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/perf/hisilicon/hisi_pcie_pmu.c b/drivers/perf/hisilicon/hisi_pcie_pmu.c
index 570ae69c38ec0d1486d0516e326e8ea1f0544175..4a902da5c1d495d45213ea0f5718dd323bad2bee 100644 (file)
--- a/drivers/perf/hisilicon/hisi_pcie_pmu.c
+++ b/drivers/perf/hisilicon/hisi_pcie_pmu.c
@@ -221,7 +221,7 @@ static void hisi_pcie_pmu_config_filter(struct perf_event *event)
        struct hisi_pcie_pmu *pcie_pmu = to_pcie_pmu(event->pmu);
        struct hw_perf_event *hwc = &event->hw;
        u64 port, trig_len, thr_len, len_mode;
-       u64 reg = HISI_PCIE_INIT_SET;
+       u64 reg = 0;
 
        /* Config HISI_PCIE_EVENT_CTRL according to event. */
        reg |= FIELD_PREP(HISI_PCIE_EVENT_M, hisi_pcie_get_real_event(event));