Merge tag 'regulator-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / arch / x86 / events / intel / core.c

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 4c9a79b..a74a2db 100644 (file)
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -1906,13 +1906,6 @@ static void intel_pmu_disable_event(struct perf_event *event)
        cpuc->intel_ctrl_host_mask &= ~(1ull << hwc->idx);
        cpuc->intel_cp_status &= ~(1ull << hwc->idx);
 
-       /*
-        * must disable before any actual event
-        * because any event may be combined with LBR
-        */
-       if (needs_branch_stack(event))
-               intel_pmu_lbr_disable(event);
-
        if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
                intel_pmu_disable_fixed(hwc);
                return;
@@ -1924,6 +1917,14 @@ static void intel_pmu_disable_event(struct perf_event *event)
                intel_pmu_pebs_disable(event);
 }
 
+static void intel_pmu_del_event(struct perf_event *event)
+{
+       if (needs_branch_stack(event))
+               intel_pmu_lbr_del(event);
+       if (event->attr.precise_ip)
+               intel_pmu_pebs_del(event);
+}
+
 static void intel_pmu_enable_fixed(struct hw_perf_event *hwc)
 {
        int idx = hwc->idx - INTEL_PMC_IDX_FIXED;
@@ -1967,12 +1968,6 @@ static void intel_pmu_enable_event(struct perf_event *event)
                intel_pmu_enable_bts(hwc->config);
                return;
        }
-       /*
-        * must enabled before any actual event
-        * because any event may be combined with LBR
-        */
-       if (needs_branch_stack(event))
-               intel_pmu_lbr_enable(event);
 
        if (event->attr.exclude_host)
                cpuc->intel_ctrl_guest_mask |= (1ull << hwc->idx);
@@ -1993,6 +1988,14 @@ static void intel_pmu_enable_event(struct perf_event *event)
        __x86_pmu_enable_event(hwc, ARCH_PERFMON_EVENTSEL_ENABLE);
 }
 
+static void intel_pmu_add_event(struct perf_event *event)
+{
+       if (event->attr.precise_ip)
+               intel_pmu_pebs_add(event);
+       if (needs_branch_stack(event))
+               intel_pmu_lbr_add(event);
+}
+
 /*
  * Save and restart an expired event. Called by NMI contexts,
  * so it has to be careful about preempting normal event ops:
@@ -3291,6 +3294,8 @@ static __initconst const struct x86_pmu intel_pmu = {
        .enable_all             = intel_pmu_enable_all,
        .enable                 = intel_pmu_enable_event,
        .disable                = intel_pmu_disable_event,
+       .add                    = intel_pmu_add_event,
+       .del                    = intel_pmu_del_event,
        .hw_config              = intel_pmu_hw_config,
        .schedule_events        = x86_schedule_events,
        .eventsel               = MSR_ARCH_PERFMON_EVENTSEL0,
@@ -3602,10 +3607,14 @@ __init int intel_pmu_init(void)
 
        /*
         * Quirk: v2 perfmon does not report fixed-purpose events, so
-        * assume at least 3 events:
+        * assume at least 3 events, when not running in a hypervisor:
         */
-       if (version > 1)
-               x86_pmu.num_counters_fixed = max((int)edx.split.num_counters_fixed, 3);
+       if (version > 1) {
+               int assume = 3 * !boot_cpu_has(X86_FEATURE_HYPERVISOR);
+
+               x86_pmu.num_counters_fixed =
+                       max((int)edx.split.num_counters_fixed, assume);
+       }
 
        if (boot_cpu_has(X86_FEATURE_PDCM)) {
                u64 capabilities;
@@ -3893,6 +3902,7 @@ __init int intel_pmu_init(void)
                break;
 
        case INTEL_FAM6_XEON_PHI_KNL:
+       case INTEL_FAM6_XEON_PHI_KNM:
                memcpy(hw_cache_event_ids,
                       slm_hw_cache_event_ids, sizeof(hw_cache_event_ids));
                memcpy(hw_cache_extra_regs,
@@ -3907,7 +3917,7 @@ __init int intel_pmu_init(void)
                x86_pmu.flags |= PMU_FL_HAS_RSP_1;
                x86_pmu.flags |= PMU_FL_NO_HT_SHARING;
 
-               pr_cont("Knights Landing events, ");
+               pr_cont("Knights Landing/Mill events, ");
                break;
 
        case INTEL_FAM6_SKYLAKE_MOBILE: