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perf/x86/amd: Remove driver-specific throttle support

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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>
Reviewed-by: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20250520181644.2673067-5-kan.liang@linux.intel.com
This commit is contained in:
Kan Liang 2025-05-20 11:16:32 -07:00 committed by Peter Zijlstra
parent b8328f6720
commit d058c7d538
2 changed files with 2 additions and 5 deletions
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3
arch/x86/events/amd/core.c
View File

@ -1003,8 +1003,7 @@ static int amd_pmu_v2_handle_irq(struct pt_regs *regs)
perf_sample_save_brstack(&data, event, &cpuc->lbr_stack, NULL);
if (perf_event_overflow(event, &data, regs))
x86_pmu_stop(event, 0);
perf_event_overflow(event, &data, regs);
}
/*

4
arch/x86/events/amd/ibs.c
View File

@ -1373,9 +1373,7 @@ static int perf_ibs_handle_irq(struct perf_ibs *perf_ibs, struct pt_regs *iregs)
hwc->sample_period = perf_ibs->min_period;
out:
if (throttle) {
perf_ibs_stop(event, 0);
} else {
if (!throttle) {
if (perf_ibs == &perf_ibs_op) {
if (ibs_caps & IBS_CAPS_OPCNTEXT) {
new_config = period & IBS_OP_MAX_CNT_EXT_MASK;