perf/x86/amd: 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>
Reviewed-by: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20250520181644.2673067-5-kan.liang@linux.intel.com

diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index 30d6ceb4c8ad49fc0cf0bd83eacd2729712cf279..5e64283b9bf2a7a50d4e261da37bad49cde74fe3 100644 (file)
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -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);
        }
 
        /*

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 0252b7ea8bcac25f292274909a8bb6a185efc37e..4bbbca02aeb1bec8c726a0c5ddeb52b654be86a2 100644 (file)
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -1373,9 +1373,7 @@ fail:
                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;