linux-kernel - [PATCH 07/49] perf/x86: Hybrid PMU support for hardware cache event

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Message-Id: <1612797946-18784-8-git-send-email-kan.liang@linux.intel.com>
Date:   Mon,  8 Feb 2021 07:25:04 -0800
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, acme@...nel.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, bp@...en8.de, namhyung@...nel.org,
        jolsa@...hat.com, ak@...ux.intel.com, yao.jin@...ux.intel.com,
        alexander.shishkin@...ux.intel.com, adrian.hunter@...el.com,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH 07/49] perf/x86: Hybrid PMU support for hardware cache event

From: Kan Liang <kan.liang@...ux.intel.com>

The hardware cache events are different among hybrid PMUs. Each hybrid
PMU should have its own hw cache event table.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
---
 arch/x86/events/core.c       | 11 +++++++++--
 arch/x86/events/perf_event.h |  9 +++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 5f79b37..27c87a7 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -351,6 +351,7 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event *event)
 {
 	struct perf_event_attr *attr = &event->attr;
 	unsigned int cache_type, cache_op, cache_result;
+	struct x86_hybrid_pmu *pmu = IS_X86_HYBRID ? container_of(event->pmu, struct x86_hybrid_pmu, pmu) : NULL;
 	u64 config, val;
 
 	config = attr->config;
@@ -370,7 +371,10 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event *event)
 		return -EINVAL;
 	cache_result = array_index_nospec(cache_result, PERF_COUNT_HW_CACHE_RESULT_MAX);
 
-	val = hw_cache_event_ids[cache_type][cache_op][cache_result];
+	if (pmu)
+		val = pmu->hw_cache_event_ids[cache_type][cache_op][cache_result];
+	else
+		val = hw_cache_event_ids[cache_type][cache_op][cache_result];
 
 	if (val == 0)
 		return -ENOENT;
@@ -379,7 +383,10 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event *event)
 		return -EINVAL;
 
 	hwc->config |= val;
-	attr->config1 = hw_cache_extra_regs[cache_type][cache_op][cache_result];
+	if (pmu)
+		attr->config1 = pmu->hw_cache_extra_regs[cache_type][cache_op][cache_result];
+	else
+		attr->config1 = hw_cache_extra_regs[cache_type][cache_op][cache_result];
 	return x86_pmu_extra_regs(val, event);
 }
 
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index f11dbc4..00fcd92 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -652,6 +652,15 @@ struct x86_hybrid_pmu {
 	int				num_counters;
 	int				num_counters_fixed;
 	struct event_constraint		unconstrained;
+
+	u64				hw_cache_event_ids
+					[PERF_COUNT_HW_CACHE_MAX]
+					[PERF_COUNT_HW_CACHE_OP_MAX]
+					[PERF_COUNT_HW_CACHE_RESULT_MAX];
+	u64				hw_cache_extra_regs
+					[PERF_COUNT_HW_CACHE_MAX]
+					[PERF_COUNT_HW_CACHE_OP_MAX]
+					[PERF_COUNT_HW_CACHE_RESULT_MAX];
 };
 
 #define IS_X86_HYBRID			cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)
-- 
2.7.4