perf/x86/intel: Enforce HT bug workaround with PEBS for SNB/IVB/HSW

This patch modifies the PEBS constraint tables for SNB/IVB/HSW
such that corrupting events supporting PEBS activate the HT
workaround.

Signed-off-by: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Stephane Eranian <eranian@google.com>
Cc: bp@alien8.de
Cc: jolsa@redhat.com
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/1416251225-17721-9-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 236afee35587aed09998d794fb79cfe8ba16d20c..2ba71ecc244f92b09114a2ead90f7758bf982447 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -326,22 +326,40 @@ struct cpu_hw_events {
 
 /* Check flags and event code, and set the HSW load flag */
 #define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(code, n) \
-       __EVENT_CONSTRAINT(code, n,                     \
+       __EVENT_CONSTRAINT(code, n,                     \
                          ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \
                          HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW)
 
+#define INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(code, n) \
+       __EVENT_CONSTRAINT(code, n,                     \
+                         ARCH_PERFMON_EVENTSEL_EVENT|X86_ALL_EVENT_FLAGS, \
+                         HWEIGHT(n), 0, \
+                         PERF_X86_EVENT_PEBS_LD_HSW|PERF_X86_EVENT_EXCL)
+
 /* Check flags and event code/umask, and set the HSW store flag */
 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(code, n) \
        __EVENT_CONSTRAINT(code, n,                     \
                          INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
                          HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_ST_HSW)
 
+#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(code, n) \
+       __EVENT_CONSTRAINT(code, n,                     \
+                         INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
+                         HWEIGHT(n), 0, \
+                         PERF_X86_EVENT_PEBS_ST_HSW|PERF_X86_EVENT_EXCL)
+
 /* Check flags and event code/umask, and set the HSW load flag */
 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(code, n) \
        __EVENT_CONSTRAINT(code, n,                     \
                          INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
                          HWEIGHT(n), 0, PERF_X86_EVENT_PEBS_LD_HSW)
 
+#define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(code, n) \
+       __EVENT_CONSTRAINT(code, n,                     \
+                         INTEL_ARCH_EVENT_MASK|X86_ALL_EVENT_FLAGS, \
+                         HWEIGHT(n), 0, \
+                         PERF_X86_EVENT_PEBS_LD_HSW|PERF_X86_EVENT_EXCL)
+
 /* Check flags and event code/umask, and set the HSW N/A flag */
 #define INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_NA(code, n) \
        __EVENT_CONSTRAINT(code, n,                     \

diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index a5149c7abe73f69e6a44ef8c3059c179a8789ff6..ca69ea56c712b590876ff9c5289a839dc91158b7 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -612,6 +612,10 @@ struct event_constraint intel_snb_pebs_event_constraints[] = {
        INTEL_PST_CONSTRAINT(0x02cd, 0x8),    /* MEM_TRANS_RETIRED.PRECISE_STORES */
        /* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
        INTEL_FLAGS_EVENT_CONSTRAINT(0x108001c2, 0xf),
+        INTEL_EXCLEVT_CONSTRAINT(0xd0, 0xf),    /* MEM_UOP_RETIRED.* */
+        INTEL_EXCLEVT_CONSTRAINT(0xd1, 0xf),    /* MEM_LOAD_UOPS_RETIRED.* */
+        INTEL_EXCLEVT_CONSTRAINT(0xd2, 0xf),    /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
+        INTEL_EXCLEVT_CONSTRAINT(0xd3, 0xf),    /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
        /* Allow all events as PEBS with no flags */
        INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
        EVENT_CONSTRAINT_END
@@ -623,6 +627,10 @@ struct event_constraint intel_ivb_pebs_event_constraints[] = {
        INTEL_PST_CONSTRAINT(0x02cd, 0x8),    /* MEM_TRANS_RETIRED.PRECISE_STORES */
        /* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
        INTEL_FLAGS_EVENT_CONSTRAINT(0x108001c2, 0xf),
+       INTEL_EXCLEVT_CONSTRAINT(0xd0, 0xf),    /* MEM_UOP_RETIRED.* */
+       INTEL_EXCLEVT_CONSTRAINT(0xd1, 0xf),    /* MEM_LOAD_UOPS_RETIRED.* */
+       INTEL_EXCLEVT_CONSTRAINT(0xd2, 0xf),    /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
+       INTEL_EXCLEVT_CONSTRAINT(0xd3, 0xf),    /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
        /* Allow all events as PEBS with no flags */
        INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
         EVENT_CONSTRAINT_END
@@ -634,16 +642,16 @@ struct event_constraint intel_hsw_pebs_event_constraints[] = {
        /* UOPS_RETIRED.ALL, inv=1, cmask=16 (cycles:p). */
        INTEL_FLAGS_EVENT_CONSTRAINT(0x108001c2, 0xf),
        INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_NA(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x11d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_LOADS */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x21d0, 0xf), /* MEM_UOPS_RETIRED.LOCK_LOADS */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x41d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_LOADS */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_LD(0x81d0, 0xf), /* MEM_UOPS_RETIRED.ALL_LOADS */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x12d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_STORES */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x42d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_STORES */
-       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_ST(0x82d0, 0xf), /* MEM_UOPS_RETIRED.ALL_STORES */
-       INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd1, 0xf),    /* MEM_LOAD_UOPS_RETIRED.* */
-       INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd2, 0xf),    /* MEM_LOAD_UOPS_L3_HIT_RETIRED.* */
-       INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_LD(0xd3, 0xf),    /* MEM_LOAD_UOPS_L3_MISS_RETIRED.* */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x11d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_LOADS */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x21d0, 0xf), /* MEM_UOPS_RETIRED.LOCK_LOADS */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x41d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_LOADS */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XLD(0x81d0, 0xf), /* MEM_UOPS_RETIRED.ALL_LOADS */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(0x12d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_STORES */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(0x42d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_STORES */
+       INTEL_FLAGS_UEVENT_CONSTRAINT_DATALA_XST(0x82d0, 0xf), /* MEM_UOPS_RETIRED.ALL_STORES */
+       INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(0xd1, 0xf),    /* MEM_LOAD_UOPS_RETIRED.* */
+       INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(0xd2, 0xf),    /* MEM_LOAD_UOPS_L3_HIT_RETIRED.* */
+       INTEL_FLAGS_EVENT_CONSTRAINT_DATALA_XLD(0xd3, 0xf),    /* MEM_LOAD_UOPS_L3_MISS_RETIRED.* */
        /* Allow all events as PEBS with no flags */
        INTEL_ALL_EVENT_CONSTRAINT(0, 0xf),
        EVENT_CONSTRAINT_END