Commit b8328f67 authored by Kan Liang's avatar Kan Liang Committed by Peter Zijlstra
Browse files

perf/x86/intel: 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: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-4-kan.liang@linux.intel.com
parent e800ac51

arch/x86/events/core.c

+1 −2
Original line number Diff line number Diff line
@@ -1728,8 +1728,7 @@ int x86_pmu_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);

	}



	if (handled)

arch/x86/events/intel/core.c

+2 −4
Original line number Diff line number Diff line
@@ -3138,8 +3138,7 @@ static void x86_pmu_handle_guest_pebs(struct pt_regs *regs, 
			continue;



		perf_sample_data_init(data, 0, event->hw.last_period);

		if (perf_event_overflow(event, data, regs))

			x86_pmu_stop(event, 0);

		perf_event_overflow(event, data, regs);



		/* Inject one fake event is enough. */

		break;
@@ -3282,8 +3281,7 @@ static int handle_pmi_common(struct pt_regs *regs, u64 status) 
		if (has_branch_stack(event))

			intel_pmu_lbr_save_brstack(&data, cpuc, event);



		if (perf_event_overflow(event, &data, regs))

			x86_pmu_stop(event, 0);

		perf_event_overflow(event, &data, regs);

	}



	return handled;

arch/x86/events/intel/ds.c

+3 −4
Original line number Diff line number Diff line
@@ -2359,8 +2359,7 @@ __intel_pmu_pebs_last_event(struct perf_event *event, 
		 * All but the last records are processed.

		 * The last one is left to be able to call the overflow handler.

		 */

		if (perf_event_overflow(event, data, regs))

			x86_pmu_stop(event, 0);

		perf_event_overflow(event, data, regs);

	}



	if (hwc->flags & PERF_X86_EVENT_AUTO_RELOAD) {
@@ -2588,8 +2587,8 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs, struct perf_sample_d 
		if (error[bit]) {

			perf_log_lost_samples(event, error[bit]);



			if (iregs && perf_event_account_interrupt(event))

				x86_pmu_stop(event, 0);

			if (iregs)

				perf_event_account_interrupt(event);

		}



		if (counts[bit]) {

arch/x86/events/intel/knc.c

+1 −2
Original line number Diff line number Diff line
@@ -254,8 +254,7 @@ static int knc_pmu_handle_irq(struct pt_regs *regs) 


		perf_sample_data_init(&data, 0, last_period);



		if (perf_event_overflow(event, &data, regs))

			x86_pmu_stop(event, 0);

		perf_event_overflow(event, &data, regs);

	}



	/*

arch/x86/events/intel/p4.c

+1 −2
Original line number Diff line number Diff line
@@ -1072,8 +1072,7 @@ static int p4_pmu_handle_irq(struct pt_regs *regs) 
			continue;





		if (perf_event_overflow(event, &data, regs))

			x86_pmu_stop(event, 0);

		perf_event_overflow(event, &data, regs);

	}



	if (handled)