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From: Kim Phillips <kim.phillips@amd.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>,
	kim.phillips@amd.com
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>, Jiri Olsa <jolsa@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Michael Petlan <mpetlan@redhat.com>,
	Namhyung Kim <namhyung@kernel.org>,
	linux-kernel@vger.kernel.org, x86@kernel.org
Subject: [PATCH 2/3 RESEND] perf/amd/uncore: Prepare L3 thread mask code for Family 19h support
Date: Wed, 11 Mar 2020 14:13:22 -0500	[thread overview]
Message-ID: <20200311191323.13124-2-kim.phillips@amd.com> (raw)
In-Reply-To: <20200311191323.13124-1-kim.phillips@amd.com>

In order to better accommodate the upcoming Family 19h support,
given the 80-char line limit, we move the existing code into a new
l3_thread_slice_mask function, and convert it to use the more
readable topology_* helper functions.

Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: x86@kernel.org
---
RESEND.  No changes since original submission 19 Feb 2020:

https://lkml.org/lkml/2020/2/19/1192

 arch/x86/events/amd/uncore.c | 28 +++++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index 4d867a752f0e..e635c40ca9c4 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -180,6 +180,23 @@ static void amd_uncore_del(struct perf_event *event, int flags)
 	hwc->idx = -1;
 }
 
+/*
+ * Convert logical cpu number to L3 PMC Config ThreadMask format
+ */
+static u64 l3_thread_slice_mask(int cpu)
+{
+	unsigned int shift, thread = 0;
+	u64 thread_mask, core = topology_core_id(cpu);
+
+	if (topology_smt_supported() && !topology_is_primary_thread(cpu))
+		thread = 1;
+
+	shift = AMD64_L3_THREAD_SHIFT + 2 * (core % 4) + thread;
+	thread_mask = BIT_ULL(shift);
+
+	return AMD64_L3_SLICE_MASK | thread_mask;
+}
+
 static int amd_uncore_event_init(struct perf_event *event)
 {
 	struct amd_uncore *uncore;
@@ -206,15 +223,8 @@ static int amd_uncore_event_init(struct perf_event *event)
 	 * 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)) {
-		int thread = 2 * (cpu_data(event->cpu).cpu_core_id % 4);
-
-		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;
-	}
+	if (l3_mask && is_llc_event(event))
+		hwc->config |= l3_thread_slice_mask(event->cpu);
 
 	uncore = event_to_amd_uncore(event);
 	if (!uncore)
-- 
2.25.1


  reply	other threads:[~2020-03-11 19:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-11 19:13 [PATCH 1/3 RESEND] perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag Kim Phillips
2020-03-11 19:13 ` Kim Phillips [this message]
2020-03-12 14:12   ` [PATCH 2/3 RESEND] perf/amd/uncore: Prepare L3 thread mask code for Family 19h support Borislav Petkov
2020-03-11 19:13 ` [PATCH 3/3 RESEND] perf/amd/uncore: Add support for Family 19h L3 PMU Kim Phillips
2020-03-12 14:14   ` Borislav Petkov
2020-03-12 13:14 ` [tip: perf/urgent] perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag tip-bot2 for Kim Phillips
2020-03-17 22:30 ` [PATCH 1/3 RESEND] " Sasha Levin

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