[tip: perf/core] perf/x86/intel: Remove driver-specific throttle support

["tip-bot2 for Kan Liang" <tip-bot2@linutronix.de>]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     b8328f67206c672a7140fd3a259892e17d96bbe6
Gitweb:        https://git.kernel.org/tip/b8328f67206c672a7140fd3a259892e17d96bbe6
Author:        Kan Liang <kan.liang@linux.intel.com>
AuthorDate:    Tue, 20 May 2025 11:16:31 -07:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Wed, 21 May 2025 13:57:43 +02:00

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: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-4-kan.liang@linux.intel.com
---
 arch/x86/events/core.c       | 3 +--
 arch/x86/events/intel/core.c | 6 ++----
 arch/x86/events/intel/ds.c   | 7 +++----
 arch/x86/events/intel/knc.c  | 3 +--
 arch/x86/events/intel/p4.c   | 3 +--
 5 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 92c3fb6..4c49eef 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -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)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index cd63292..3a319cf 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -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;
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 319d0d4..fb02e43 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -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]) {
diff --git a/arch/x86/events/intel/knc.c b/arch/x86/events/intel/knc.c
index 3e8ec04..3845891 100644
--- a/arch/x86/events/intel/knc.c
+++ b/arch/x86/events/intel/knc.c
@@ -254,8 +254,7 @@ again:
 
 		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);
 	}
 
 	/*
diff --git a/arch/x86/events/intel/p4.c b/arch/x86/events/intel/p4.c
index c85a9fc..126d5ae 100644
--- a/arch/x86/events/intel/p4.c
+++ b/arch/x86/events/intel/p4.c
@@ -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)