[PATCH v2 3/6] perf, x86: Add Intel SandyBridge uncore pmu
From: Lin Ming
Date: Fri Jul 15 2011 - 10:30:05 EST
Add Intel SandyBridge uncore pmu support.
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
arch/x86/include/asm/msr-index.h | 26 +++++++++++-
arch/x86/kernel/cpu/perf_event_intel_uncore.c | 57 +++++++++++++++++++++++++
arch/x86/kernel/cpu/perf_event_intel_uncore.h | 11 +++++
3 files changed, 93 insertions(+), 1 deletions(-)
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index e66011e..fa0e9e6 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -421,7 +421,7 @@
#define MSR_CORE_PERF_GLOBAL_CTRL 0x0000038f
#define MSR_CORE_PERF_GLOBAL_OVF_CTRL 0x00000390
-/* Intel Nehalem/Westmere uncore performance counters */
+/* Intel Nehalem/Westmere/SandyBridge uncore performance counters */
#define MSR_UNCORE_PERF_GLOBAL_CTRL 0x00000391
#define MSR_UNCORE_FIXED_CTR_CTRL 0x00000394
#define MSR_UNCORE_FIXED_CTR0 0x00000395
@@ -429,6 +429,30 @@
#define MSR_NHM_UNCORE_PMC0 0x000003b0
#define MSR_NHM_UNCORE_PERFEVTSEL0 0x000003c0
+#define MSR_SNB_UNCORE_CBO_0_PERFEVTSEL0 0x00000700
+#define MSR_SNB_UNCORE_CBO_0_PERFEVTSEL1 0x00000701
+#define MSR_SNB_UNCORE_CBO_0_UNIT_STATUS 0x00000705
+#define MSR_SNB_UNCORE_CBO_0_PER_CTR0 0x00000706
+#define MSR_SNB_UNCORE_CBO_0_PER_CTR1 0x00000707
+
+#define MSR_SNB_UNCORE_CBO_1_PERFEVTSEL0 0x00000710
+#define MSR_SNB_UNCORE_CBO_1_PERFEVTSEL1 0x00000711
+#define MSR_SNB_UNCORE_CBO_1_UNIT_STATUS 0x00000715
+#define MSR_SNB_UNCORE_CBO_1_PER_CTR0 0x00000716
+#define MSR_SNB_UNCORE_CBO_1_PER_CTR1 0x00000717
+
+#define MSR_SNB_UNCORE_CBO_2_PERFEVTSEL0 0x00000720
+#define MSR_SNB_UNCORE_CBO_2_PERFEVTSEL1 0x00000721
+#define MSR_SNB_UNCORE_CBO_2_UNIT_STATUS 0x00000725
+#define MSR_SNB_UNCORE_CBO_2_PER_CTR0 0x00000726
+#define MSR_SNB_UNCORE_CBO_2_PER_CTR1 0x00000727
+
+#define MSR_SNB_UNCORE_CBO_3_PERFEVTSEL0 0x00000730
+#define MSR_SNB_UNCORE_CBO_3_PERFEVTSEL1 0x00000731
+#define MSR_SNB_UNCORE_CBO_3_UNIT_STATUS 0x00000735
+#define MSR_SNB_UNCORE_CBO_3_PER_CTR0 0x00000736
+#define MSR_SNB_UNCORE_CBO_3_PER_CTR1 0x00000737
+
/* Geode defined MSRs */
#define MSR_GEODE_BUSCONT_CONF0 0x00001900
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 79a501e..1100589 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -98,6 +98,59 @@ static __initconst const struct intel_uncore_pmu nhm_uncore_pmu = {
.cntval_bits_fixed = 48,
};
+/* SandyBridge uncore pmu */
+
+static struct uncore_config {
+ unsigned long config_base;
+ unsigned long event_base;
+} snb_uncore_configs[UNCORE_NUM_GENERIC_COUNTERS] = {
+ {MSR_SNB_UNCORE_CBO_0_PERFEVTSEL0, MSR_SNB_UNCORE_CBO_0_PER_CTR0},
+ {MSR_SNB_UNCORE_CBO_0_PERFEVTSEL1, MSR_SNB_UNCORE_CBO_0_PER_CTR1},
+ {MSR_SNB_UNCORE_CBO_1_PERFEVTSEL0, MSR_SNB_UNCORE_CBO_1_PER_CTR0},
+ {MSR_SNB_UNCORE_CBO_1_PERFEVTSEL1, MSR_SNB_UNCORE_CBO_1_PER_CTR1},
+ {MSR_SNB_UNCORE_CBO_2_PERFEVTSEL0, MSR_SNB_UNCORE_CBO_2_PER_CTR0},
+ {MSR_SNB_UNCORE_CBO_2_PERFEVTSEL1, MSR_SNB_UNCORE_CBO_2_PER_CTR1},
+ {MSR_SNB_UNCORE_CBO_3_PERFEVTSEL0, MSR_SNB_UNCORE_CBO_3_PER_CTR0},
+ {MSR_SNB_UNCORE_CBO_3_PERFEVTSEL1, MSR_SNB_UNCORE_CBO_3_PER_CTR1},
+};
+
+static void snb_uncore_pmu_enable_all(void)
+{
+ wrmsrl(MSR_UNCORE_PERF_GLOBAL_CTRL,
+ SNB_UNCORE_PERF_GLOBAL_CTRL_EN);
+}
+
+static void snb_uncore_pmu_hw_config(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ int i = hwc->idx;
+
+ if (event->hw.idx == X86_PMC_IDX_FIXED) {
+ uncore_fixed_hw_config(event);
+ return;
+ }
+
+ hwc->config = event->attr.config & SNB_UNCORE_RAW_EVENT_MASK;
+ hwc->config_base = snb_uncore_configs[i].config_base;
+ hwc->event_base = snb_uncore_configs[i].event_base;
+}
+
+static void snb_uncore_pmu_enable_event(struct perf_event *event)
+{
+ uncore_pmu_enable_event(event, SNB_UNCORE_FIXED_CTR_CTRL_EN);
+}
+
+static __initconst const struct intel_uncore_pmu snb_uncore_pmu = {
+ .name = "SandyBridge",
+ .disable_all = uncore_pmu_disable_all,
+ .enable_all = snb_uncore_pmu_enable_all,
+ .enable = snb_uncore_pmu_enable_event,
+ .disable = uncore_pmu_disable_event,
+ .hw_config = snb_uncore_pmu_hw_config,
+ .cntval_bits = 44,
+ .cntval_bits_fixed = 48,
+};
+
static u64 uncore_perf_event_update(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
@@ -436,6 +489,10 @@ static int __init uncore_pmu_init(void)
intel_uncore_pmu = nhm_uncore_pmu;
break;
+ case 42: /* SandyBridge */
+ intel_uncore_pmu = snb_uncore_pmu;
+ break;
+
default:
return 0;
}
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 431c8b4..c7392aa 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -5,6 +5,9 @@
#define UNCORE_FIXED_EVENT 0xFFFF
#define NHM_UNCORE_FIXED_CTR_CTRL_EN (1ULL << 0)
+#define SNB_UNCORE_FIXED_CTR_CTRL_EN (1ULL << 22)
+
+#define SNB_UNCORE_PERF_GLOBAL_CTRL_EN (1ULL << 29)
#define UNCORE_EVENTSEL_EVENT 0x000000FFULL
#define UNCORE_EVENTSEL_UMASK 0x0000FF00ULL
@@ -12,6 +15,7 @@
#define UNCORE_EVENTSEL_ENABLE (1ULL << 22)
#define UNCORE_EVENTSEL_INV (1ULL << 23)
#define NHM_UNCORE_EVENTSEL_CMASK 0xFF000000ULL
+#define SNB_UNCORE_EVENTSEL_CMASK 0x1F000000ULL
#define NHM_UNCORE_RAW_EVENT_MASK \
(UNCORE_EVENTSEL_EVENT | \
@@ -20,6 +24,13 @@
UNCORE_EVENTSEL_INV | \
NHM_UNCORE_EVENTSEL_CMASK)
+#define SNB_UNCORE_RAW_EVENT_MASK \
+ (UNCORE_EVENTSEL_EVENT | \
+ UNCORE_EVENTSEL_UMASK | \
+ UNCORE_EVENTSEL_EDGE | \
+ UNCORE_EVENTSEL_INV | \
+ SNB_UNCORE_EVENTSEL_CMASK)
+
/* 8 generic counters + 1 fixed counter */
#define UNCORE_NUM_GENERIC_COUNTERS 8
#define UNCORE_NUM_FIXED_COUNTERS 1
--
1.7.5.1
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