Commit 2f217d58 authored Jun 28, 2019 by Kim Phillips Committed by Ingo Molnar Jul 13, 2019

perf/x86/amd/uncore: Set the thread mask for F17h L3 PMCs

Fill in the L3 performance event select register ThreadMask
bitfield, to enable per hardware thread accounting.

Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Gary Hook <Gary.Hook@amd.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Liska <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: https://lkml.kernel.org/r/20190628215906.4276-2-kim.phillips@amd.com

Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 16f46411

arch/x86/events/amd/uncore.c

+11 −4

Original line number	Diff line number	Diff line
		@@ -202,15 +202,22 @@ static int amd_uncore_event_init(struct perf_event *event)
		hwc->config = event->attr.config & AMD64_RAW_EVENT_MASK_NB;
		hwc->idx = -1;

		if (event->cpu < 0)
		return -EINVAL;

		/*
		* SliceMask and ThreadMask need to be set for certain L3 events in
		* Family 17h. For other events, the two fields do not affect the count.
		*/
		if (l3_mask && is_llc_event(event))
		hwc->config \|= (AMD64_L3_SLICE_MASK \| AMD64_L3_THREAD_MASK);
		if (l3_mask && is_llc_event(event)) {
		int thread = 2 * (cpu_data(event->cpu).cpu_core_id % 4);

		if (event->cpu < 0)
		return -EINVAL;
		if (smp_num_siblings > 1)
		thread += cpu_data(event->cpu).apicid & 1;

		hwc->config \|= (1ULL << (AMD64_L3_THREAD_SHIFT + thread) &
		AMD64_L3_THREAD_MASK) \| AMD64_L3_SLICE_MASK;
		}

		uncore = event_to_amd_uncore(event);
		if (!uncore)