linux-kernel - [tip:perf/urgent] perf/x86/amd/uncore: Set the thread mask for F17h L3 PMCs

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Date:   Sat, 13 Jul 2019 04:11:34 -0700
From:   tip-bot for Kim Phillips <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     hpa@...or.com, tglx@...utronix.de, kim.phillips@....com,
        acme@...hat.com, torvalds@...ux-foundation.org, Gary.Hook@....com,
        puwen@...on.cn, alexander.shishkin@...ux.intel.com,
        Suravee.Suthikulpanit@....com, mingo@...nel.org, mliska@...e.cz,
        bp@...en8.de, namhyung@...nel.org, Janakarajan.Natarajan@....com,
        stable@...r.kernel.org, peterz@...radead.org, jolsa@...hat.com,
        linux-kernel@...r.kernel.org, eranian@...gle.com,
        vincent.weaver@...ne.edu
Subject: [tip:perf/urgent] perf/x86/amd/uncore: Set the thread mask for F17h
 L3 PMCs

Commit-ID:  2f217d58a8a086d3399fecce39fb358848e799c4
Gitweb:     https://git.kernel.org/tip/2f217d58a8a086d3399fecce39fb358848e799c4
Author:     Kim Phillips <kim.phillips@....com>
AuthorDate: Fri, 28 Jun 2019 21:59:33 +0000
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Sat, 13 Jul 2019 11:21:27 +0200

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@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: <stable@...r.kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Gary Hook <Gary.Hook@....com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@....com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Martin Liska <mliska@...e.cz>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Pu Wen <puwen@...on.cn>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Vince Weaver <vincent.weaver@...ne.edu>
Link: https://lkml.kernel.org/r/20190628215906.4276-2-kim.phillips@amd.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/events/amd/uncore.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index c2c4ae5fbbfc..a6ea07f2aa84 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -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)