linux-kernel - [PATCH 3/3] perf/x86/rapl: Add support for Intel SPR platform

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Message-Id: <20200716151859.6854-3-rui.zhang@intel.com>
Date:   Thu, 16 Jul 2020 23:18:59 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org
Cc:     mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, kan.liang@...ux.intel.com,
        len.brown@...el.com
Subject: [PATCH 3/3] perf/x86/rapl: Add support for Intel SPR platform

Intel SPR platform uses fixed 16 bit energy unit for DRAM RAPL domain,
and fixed 0 bit energy unit for Psys RAPL domain.
After this, on SPR platform the energy counters appear in perf list.

Signed-off-by: Zhang Rui <rui.zhang@...el.com>
Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>
Acked-by: Len Brown <len.brown@...el.com>
---
 arch/x86/events/rapl.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 5b3e11299c8d..731e3a32f723 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -133,6 +133,7 @@ struct rapl_pmus {
 enum rapl_unit_quirk {
 	RAPL_UNIT_QUIRK_NONE,
 	RAPL_UNIT_QUIRK_INTEL_HSW,
+	RAPL_UNIT_QUIRK_INTEL_SPR,
 };
 
 struct rapl_model {
@@ -627,6 +628,14 @@ static int rapl_check_hw_unit(struct rapl_model *rm)
 	case RAPL_UNIT_QUIRK_INTEL_HSW:
 		rapl_hw_unit[PERF_RAPL_RAM] = 16;
 		break;
+	/*
+	 * SPR shares the same DRAM domain energy unit as HSW, plus it
+	 * also has a fixed energy unit for Psys domain.
+	 */
+	case RAPL_UNIT_QUIRK_INTEL_SPR:
+		rapl_hw_unit[PERF_RAPL_RAM] = 16;
+		rapl_hw_unit[PERF_RAPL_PSYS] = 0;
+		break;
 	default:
 		break;
 	}
@@ -757,6 +766,16 @@ static struct rapl_model model_skl = {
 	.rapl_msrs      = intel_rapl_msrs,
 };
 
+static struct rapl_model model_spr = {
+	.events		= BIT(PERF_RAPL_PP0) |
+			  BIT(PERF_RAPL_PKG) |
+			  BIT(PERF_RAPL_RAM) |
+			  BIT(PERF_RAPL_PSYS),
+	.unit_quirk	= RAPL_UNIT_QUIRK_INTEL_SPR,
+	.msr_power_unit = MSR_RAPL_POWER_UNIT,
+	.rapl_msrs      = intel_rapl_msrs,
+};
+
 static struct rapl_model model_amd_fam17h = {
 	.events		= BIT(PERF_RAPL_PKG),
 	.msr_power_unit = MSR_AMD_RAPL_POWER_UNIT,
@@ -793,6 +812,7 @@ static const struct x86_cpu_id rapl_model_match[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X,		&model_hsx),
 	X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L,		&model_skl),
 	X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE,		&model_skl),
+	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&model_spr),
 	X86_MATCH_VENDOR_FAM(AMD, 0x17, &model_amd_fam17h),
 	{},
 };
-- 
2.17.1