[PATCH v2 5/5] perf/x86/rapl: add AMD Fam17h RAPL support

[Stephane Eranian]

This patch enables AMD Fam17h RAPL support for the Package level metric.
The support is as per AMD Fam17h Model31h (Zen2) and model 00-ffh (Zen1) PPR.

The same output is available via the energy-pkg pseudo event:

$ perf stat -a -I 1000 --per-socket -e power/energy-pkg/

Signed-off-by: Stephane Eranian <eran...@google.com>
---
 arch/x86/events/rapl.c           | 18 ++++++++++++++++++
 arch/x86/include/asm/msr-index.h |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index fcb21fbcfe0d0..4ed95d03f2a74 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -537,6 +537,16 @@ static struct perf_msr intel_rapl_msrs[] = {
        [PERF_RAPL_PSYS] = { MSR_PLATFORM_ENERGY_STATUS, 
&rapl_events_psys_group,  test_msr },
 };
 
+/*
+ * force to PERF_RAPL_MAX size due to:
+ * - perf_msr_probe(PERF_RAPL_MAX)
+ * - want to use same event codes across both architectures
+ */
+static struct perf_msr amd_rapl_msrs[PERF_RAPL_MAX] = {
+       [PERF_RAPL_PKG]  = { MSR_AMD_PKG_ENERGY_STATUS,  
&rapl_events_pkg_group,   test_msr },
+};
+
+
 static int rapl_cpu_offline(unsigned int cpu)
 {
        struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu);
@@ -740,6 +750,13 @@ static struct rapl_model model_skl = {
        .rapl_msrs      = intel_rapl_msrs,
 };
 
+static struct rapl_model model_amd_fam17h = {
+       .events         = BIT(PERF_RAPL_PKG),
+       .apply_quirk    = false,
+       .msr_power_unit = MSR_AMD_RAPL_POWER_UNIT,
+       .rapl_msrs      = amd_rapl_msrs,
+};
+
 static const struct x86_cpu_id rapl_model_match[] __initconst = {
        X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE,         &model_snb),
        X86_MATCH_INTEL_FAM6_MODEL(SANDYBRIDGE_X,       &model_snbep),
@@ -768,6 +785,7 @@ static const struct x86_cpu_id rapl_model_match[] 
__initconst = {
        X86_MATCH_INTEL_FAM6_MODEL(ICELAKE,             &model_skl),
        X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L,         &model_skl),
        X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE,           &model_skl),
+       X86_MATCH_VENDOR_FAM(AMD, 0x17, &model_amd_fam17h),
        {},
 };
 MODULE_DEVICE_TABLE(x86cpu, rapl_model_match);
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 12c9684d59ba6..ef452b817f44f 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -301,6 +301,9 @@
 #define MSR_PP1_ENERGY_STATUS          0x00000641
 #define MSR_PP1_POLICY                 0x00000642
 
+#define MSR_AMD_PKG_ENERGY_STATUS      0xc001029b
+#define MSR_AMD_RAPL_POWER_UNIT                0xc0010299
+
 /* Config TDP MSRs */
 #define MSR_CONFIG_TDP_NOMINAL         0x00000648
 #define MSR_CONFIG_TDP_LEVEL_1         0x00000649
-- 
2.27.0.rc0.183.gde8f92d652-goog