linux-kernel - [PATCH] perf/x86/intel/uncore: add events for Intel SPR IMC PMU

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Date:   Wed, 19 Apr 2023 14:42:41 -0700
From:   Stephane Eranian <eranian@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     peterz@...radead.org, kan.liang@...el.com, ak@...ux.intel.com,
        namhyung@...nel.org, irogers@...gle.com
Subject: [PATCH] perf/x86/intel/uncore: add events for Intel SPR IMC PMU

Add missing clockticks and cas_count_* events for Intel SapphireRapids IMC
PMU. These events are useful to measure memory bandwidth.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
---
 arch/x86/events/intel/uncore_snbep.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index 7d1199554fe3..fa9b209a11fa 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -6068,6 +6068,17 @@ static struct intel_uncore_ops spr_uncore_mmio_ops = {
 	.read_counter		= uncore_mmio_read_counter,
 };
 
+static struct uncore_event_desc spr_uncore_imc_events[] = {
+	INTEL_UNCORE_EVENT_DESC(clockticks,      "event=0x01,umask=0x00"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_read,  "event=0x05,umask=0xcf"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_read.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_read.unit, "MiB"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_write, "event=0x05,umask=0xf0"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_write.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_write.unit, "MiB"),
+	{ /* end: all zeroes */ },
+};
+
 static struct intel_uncore_type spr_uncore_imc = {
 	SPR_UNCORE_COMMON_FORMAT(),
 	.name			= "imc",
@@ -6075,6 +6086,7 @@ static struct intel_uncore_type spr_uncore_imc = {
 	.fixed_ctr		= SNR_IMC_MMIO_PMON_FIXED_CTR,
 	.fixed_ctl		= SNR_IMC_MMIO_PMON_FIXED_CTL,
 	.ops			= &spr_uncore_mmio_ops,
+	.event_descs		= spr_uncore_imc_events,
 };
 
 static void spr_uncore_pci_enable_event(struct intel_uncore_box *box,
-- 
2.40.0.634.g4ca3ef3211-goog