perf, x86: Add Intel SandyBridge CPU support

This patch adds basic SandyBridge support, including hardware
cache events and PEBS events support.

It has been tested on SandyBridge CPUs with perf stat and also
with PEBS based profiling - both work fine.

The patch does not affect other models.

v2 -> v3:
 - fix PEBS event 0xd0 with right umask combinations
 - move snb pebs constraint assignment to intel_pmu_init

v1 -> v2:
 - add more raw and PEBS events constraints
 - use offcore events for LLC-* cache events
 - remove the call to Nehalem workaround enable_all function

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <1299072424.2175.24.camel@localhost>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 124 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 008835c1d79c..d00f386b0b30 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -76,6 +76,19 @@ static struct event_constraint intel_westmere_event_constraints[] =
         EVENT_CONSTRAINT_END
 };
 
+static struct event_constraint intel_snb_event_constraints[] =
+{
+        FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
+        FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
+        /* FIXED_EVENT_CONSTRAINT(0x013c, 2), CPU_CLK_UNHALTED.REF */
+        INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
+        INTEL_EVENT_CONSTRAINT(0xb7, 0x1), /* OFF_CORE_RESPONSE_0 */
+        INTEL_EVENT_CONSTRAINT(0xbb, 0x8), /* OFF_CORE_RESPONSE_1 */
+        INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
+        INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
+        EVENT_CONSTRAINT_END
+};
+
 static struct event_constraint intel_gen_event_constraints[] =
 {
         FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
@@ -89,6 +102,106 @@ static u64 intel_pmu_event_map(int hw_event)
         return intel_perfmon_event_map[hw_event];
 }
 
+static __initconst const u64 snb_hw_cache_event_ids
+                                [PERF_COUNT_HW_CACHE_MAX]
+                                [PERF_COUNT_HW_CACHE_OP_MAX]
+                                [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D) ] = {
+        [ C(OP_READ) ] = {
+                [ C(RESULT_ACCESS) ] = 0xf1d0, /* MEM_UOP_RETIRED.LOADS        */
+                [ C(RESULT_MISS)   ] = 0x0151, /* L1D.REPLACEMENT              */
+        },
+        [ C(OP_WRITE) ] = {
+                [ C(RESULT_ACCESS) ] = 0xf2d0, /* MEM_UOP_RETIRED.STORES       */
+                [ C(RESULT_MISS)   ] = 0x0851, /* L1D.ALL_M_REPLACEMENT        */
+        },
+        [ C(OP_PREFETCH) ] = {
+                [ C(RESULT_ACCESS) ] = 0x0,
+                [ C(RESULT_MISS)   ] = 0x024e, /* HW_PRE_REQ.DL1_MISS          */
+        },
+ },
+ [ C(L1I ) ] = {
+        [ C(OP_READ) ] = {
+                [ C(RESULT_ACCESS) ] = 0x0,
+                [ C(RESULT_MISS)   ] = 0x0280, /* ICACHE.MISSES */
+        },
+        [ C(OP_WRITE) ] = {
+                [ C(RESULT_ACCESS) ] = -1,
+                [ C(RESULT_MISS)   ] = -1,
+        },
+        [ C(OP_PREFETCH) ] = {
+                [ C(RESULT_ACCESS) ] = 0x0,
+                [ C(RESULT_MISS)   ] = 0x0,
+        },
+ },
+ [ C(LL  ) ] = {
+        /*
+         * TBD: Need Off-core Response Performance Monitoring support
+         */
+        [ C(OP_READ) ] = {
+                /* OFFCORE_RESPONSE_0.ANY_DATA.LOCAL_CACHE */
+                [ C(RESULT_ACCESS) ] = 0x01b7,
+                /* OFFCORE_RESPONSE_1.ANY_DATA.ANY_LLC_MISS */
+                [ C(RESULT_MISS)   ] = 0x01bb,
+        },
+        [ C(OP_WRITE) ] = {
+                /* OFFCORE_RESPONSE_0.ANY_RFO.LOCAL_CACHE */
+                [ C(RESULT_ACCESS) ] = 0x01b7,
+                /* OFFCORE_RESPONSE_1.ANY_RFO.ANY_LLC_MISS */
+                [ C(RESULT_MISS)   ] = 0x01bb,
+        },
+        [ C(OP_PREFETCH) ] = {
+                /* OFFCORE_RESPONSE_0.PREFETCH.LOCAL_CACHE */
+                [ C(RESULT_ACCESS) ] = 0x01b7,
+                /* OFFCORE_RESPONSE_1.PREFETCH.ANY_LLC_MISS */
+                [ C(RESULT_MISS)   ] = 0x01bb,
+        },
+ },
+ [ C(DTLB) ] = {
+        [ C(OP_READ) ] = {
+                [ C(RESULT_ACCESS) ] = 0x81d0, /* MEM_UOP_RETIRED.ALL_LOADS */
+                [ C(RESULT_MISS)   ] = 0x0108, /* DTLB_LOAD_MISSES.CAUSES_A_WALK */
+        },
+        [ C(OP_WRITE) ] = {
+                [ C(RESULT_ACCESS) ] = 0x82d0, /* MEM_UOP_RETIRED.ALL_STORES */
+                [ C(RESULT_MISS)   ] = 0x0149, /* DTLB_STORE_MISSES.MISS_CAUSES_A_WALK */
+        },
+        [ C(OP_PREFETCH) ] = {
+                [ C(RESULT_ACCESS) ] = 0x0,
+                [ C(RESULT_MISS)   ] = 0x0,
+        },
+ },
+ [ C(ITLB) ] = {
+        [ C(OP_READ) ] = {
+                [ C(RESULT_ACCESS) ] = 0x1085, /* ITLB_MISSES.STLB_HIT         */
+                [ C(RESULT_MISS)   ] = 0x0185, /* ITLB_MISSES.CAUSES_A_WALK    */
+        },
+        [ C(OP_WRITE) ] = {
+                [ C(RESULT_ACCESS) ] = -1,
+                [ C(RESULT_MISS)   ] = -1,
+        },
+        [ C(OP_PREFETCH) ] = {
+                [ C(RESULT_ACCESS) ] = -1,
+                [ C(RESULT_MISS)   ] = -1,
+        },
+ },
+ [ C(BPU ) ] = {
+        [ C(OP_READ) ] = {
+                [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
+                [ C(RESULT_MISS)   ] = 0x00c5, /* BR_MISP_RETIRED.ALL_BRANCHES */
+        },
+        [ C(OP_WRITE) ] = {
+                [ C(RESULT_ACCESS) ] = -1,
+                [ C(RESULT_MISS)   ] = -1,
+        },
+        [ C(OP_PREFETCH) ] = {
+                [ C(RESULT_ACCESS) ] = -1,
+                [ C(RESULT_MISS)   ] = -1,
+        },
+ },
+};
+
 static __initconst const u64 westmere_hw_cache_event_ids
                                 [PERF_COUNT_HW_CACHE_MAX]
                                 [PERF_COUNT_HW_CACHE_OP_MAX]
@@ -1062,6 +1175,17 @@ static __init int intel_pmu_init(void)
                 pr_cont("Westmere events, ");
                 break;
 
+        case 42: /* SandyBridge */
+                memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
+                       sizeof(hw_cache_event_ids));
+
+                intel_pmu_lbr_init_nhm();
+
+                x86_pmu.event_constraints = intel_snb_event_constraints;
+                x86_pmu.pebs_constraints = intel_snb_pebs_events;
+                pr_cont("SandyBridge events, ");
+                break;
+
         default:
                 /*
                  * default constraints for v2 and up