kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-20 19:23:40 +00:00
Code Issues Releases Packages Activity
linux/drivers/perf
History
Xu Yang c7802ff51a perf/imx_ddr: don't enable counter0 if none of 4 counters are used 
[ Upstream commit f4e2bd91dd ]

In current driver, counter0 will be enabled after ddr_perf_pmu_enable()
is called even though none of the 4 counters are used. This will cause
counter0 continue to count until ddr_perf_pmu_disabled() is called. If
pmu is not disabled all the time, the pmu interrupt will be asserted
from time to time due to counter0 will overflow and irq handler will
clear it. It's not an expected behavior. This patch will not enable
counter0 if none of 4 counters are used.

Fixes: 9a66d36cc7 ("drivers/perf: imx_ddr: Add DDR performance counter support to perf")
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20230811015438.1999307-2-xu.yang_2@nxp.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-09-19 12:22:31 +02:00
..
hisilicon perf/hisi: Constify static attribute_group structs 2021-06-08 12:49:54 +01:00
arm-cci.c drivers/perf: arm-cci: Fix checkpatch spacing error 2021-05-25 18:59:23 +01:00
arm-ccn.c perf/arm-ccn: Use irq_set_affinity() 2021-05-24 11:01:59 +01:00
arm-cmn.c perf/arm-cmn: Fix DTC reset 2023-07-23 13:46:46 +02:00
arm_dmc620_pmu.c perf/arm_dmc620: Fix hotplug callback leak in dmc620_pmu_init() 2022-12-31 13:13:58 +01:00
arm_dsu_pmu.c perf: arm_dsu: Fix hotplug callback leak in dsu_pmu_init() 2022-12-31 13:13:58 +01:00
arm_pmu.c arm_pmu: Validate single/group leader events 2022-04-27 14:39:00 +02:00
arm_pmu_acpi.c drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer 2020-03-02 12:07:35 +00:00
arm_pmu_platform.c perf/arm_pmu_platform: fix tests for platform_get_irq() failure 2022-09-20 12:39:45 +02:00
arm_smmuv3_pmu.c perf/smmuv3: Fix hotplug callback leak in arm_smmu_pmu_init() 2022-12-31 13:13:58 +01:00
arm_spe_pmu.c drivers/perf: arm_spe: Fix consistency of SYS_PMSCR_EL1.CX 2022-08-17 14:23:14 +02:00
fsl_imx8_ddr_perf.c perf/imx_ddr: don't enable counter0 if none of 4 counters are used 2023-09-19 12:22:31 +02:00
Kconfig driver/perf: Remove ARM_SMMU_V3_PMU dependency on ARM_SMMU_V3 2021-02-01 12:39:40 +00:00
Makefile driver/perf: Add PMU driver for the ARM DMC-620 memory controller 2020-11-25 14:51:21 +00:00
qcom_l2_pmu.c perf: qcom_l2_pmu: fix an incorrect NULL check on list iterator 2022-04-13 20:59:24 +02:00
qcom_l3_pmu.c drivers/perf: Simplify EVENT ATTR macro in qcom_l3_pmu.c 2021-06-11 11:18:40 +01:00
thunderx2_pmu.c drivers/perf: Remove redundant dev_err call in tx2_uncore_pmu_init_dev() 2021-05-25 18:57:19 +01:00
xgene_pmu.c drivers/perf: Simplify EVENT ATTR macro in xgene_pmu.c 2021-06-11 11:18:40 +01:00