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perf/arm: Remove driver-specific throttle support 

The throttle support has been added in the generic code. Remove
the driver-specific throttle support.

Besides the throttle, perf_event_overflow may return true because of
event_limit. It already does an inatomic event disable. The pmu->stop
is not required either.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Leo Yan <leo.yan@arm.com>
Link: https://lore.kernel.org/r/20250520181644.2673067-9-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang 2025-05-20 11:16:36 -07:00 committed by Peter Zijlstra
parent 6792f74e8d
commit 1507376528
4 changed files with 5 additions and 10 deletions
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3
drivers/perf/arm_pmuv3.c
View File

@ -887,8 +887,7 @@ static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
* an irq_work which will be taken care of in the handling of
* IPI_IRQ_WORK.
*/
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(event);
perf_event_overflow(event, &data, regs);
}
armv8pmu_start(cpu_pmu);

3
drivers/perf/arm_v6_pmu.c
View File

@ -276,8 +276,7 @@ armv6pmu_handle_irq(struct arm_pmu *cpu_pmu)
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(event);
perf_event_overflow(event, &data, regs);
}
/*

3
drivers/perf/arm_v7_pmu.c
View File

@ -930,8 +930,7 @@ static irqreturn_t armv7pmu_handle_irq(struct arm_pmu *cpu_pmu)
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(event);
perf_event_overflow(event, &data, regs);
}
/*

6
drivers/perf/arm_xscale_pmu.c
View File

@ -186,8 +186,7 @@ xscale1pmu_handle_irq(struct arm_pmu *cpu_pmu)
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(event);
perf_event_overflow(event, &data, regs);
}
irq_work_run();
@ -519,8 +518,7 @@ xscale2pmu_handle_irq(struct arm_pmu *cpu_pmu)
if (!armpmu_event_set_period(event))
continue;
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(event);
perf_event_overflow(event, &data, regs);
}
irq_work_run();