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@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Acked-by: Len Brown <len.brown@intel.com>
Link: https://lore.kernel.org/r/20200811153149.12242-4-rui.zhang@intel.com

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index d0002eb971b754ea28529b4b13eabc7114007f6a..67b411f7e8c41a6cea13376e1c358d355c85d179 100644 (file)
--- 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),
        X86_MATCH_VENDOR_FAM(HYGON,     0x18,           &model_amd_fam17h),
        {},