perf_events, x86: Implement intel core solo/duo support
Peter Zijlstra [Fri, 29 Jan 2010 12:25:31 +0000 (13:25 +0100)]
Implement Intel Core Solo/Duo, aka.
Intel Architectural Performance Monitoring Version 1.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/perf_event.c

index 1846ead..5b91992 100644 (file)
@@ -228,6 +228,17 @@ static const u64 intel_perfmon_event_map[] =
 
 static struct event_constraint intel_core_event_constraints[] =
 {
+       INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */
+       INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */
+       INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */
+       INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */
+       INTEL_EVENT_CONSTRAINT(0x19, 0x2), /* DELAYED_BYPASS */
+       INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FP_COMP_INSTR_RET */
+       EVENT_CONSTRAINT_END
+};
+
+static struct event_constraint intel_core2_event_constraints[] =
+{
        FIXED_EVENT_CONSTRAINT(0xc0, (0x3|(1ULL<<32))), /* INSTRUCTIONS_RETIRED */
        FIXED_EVENT_CONSTRAINT(0x3c, (0x3|(1ULL<<33))), /* UNHALTED_CORE_CYCLES */
        INTEL_EVENT_CONSTRAINT(0x10, 0x1), /* FP_COMP_OPS_EXE */
@@ -1216,7 +1227,7 @@ static void intel_pmu_disable_all(void)
                intel_pmu_disable_bts();
 }
 
-static void amd_pmu_disable_all(void)
+static void x86_pmu_disable_all(void)
 {
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
        int idx;
@@ -1226,11 +1237,11 @@ static void amd_pmu_disable_all(void)
 
                if (!test_bit(idx, cpuc->active_mask))
                        continue;
-               rdmsrl(MSR_K7_EVNTSEL0 + idx, val);
+               rdmsrl(x86_pmu.eventsel + idx, val);
                if (!(val & ARCH_PERFMON_EVENTSEL0_ENABLE))
                        continue;
                val &= ~ARCH_PERFMON_EVENTSEL0_ENABLE;
-               wrmsrl(MSR_K7_EVNTSEL0 + idx, val);
+               wrmsrl(x86_pmu.eventsel + idx, val);
        }
 }
 
@@ -1278,7 +1289,7 @@ static void intel_pmu_enable_all(void)
        }
 }
 
-static void amd_pmu_enable_all(void)
+static void x86_pmu_enable_all(void)
 {
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
        int idx;
@@ -1292,7 +1303,7 @@ static void amd_pmu_enable_all(void)
 
                val = event->hw.config;
                val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
-               wrmsrl(MSR_K7_EVNTSEL0 + idx, val);
+               wrmsrl(x86_pmu.eventsel + idx, val);
        }
 }
 
@@ -1546,7 +1557,7 @@ static inline void intel_pmu_ack_status(u64 ack)
        wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack);
 }
 
-static inline void x86_pmu_enable_event(struct hw_perf_event *hwc, int idx)
+static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc, int idx)
 {
        (void)checking_wrmsrl(hwc->config_base + idx,
                              hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE);
@@ -1598,12 +1609,6 @@ intel_pmu_disable_event(struct hw_perf_event *hwc, int idx)
        x86_pmu_disable_event(hwc, idx);
 }
 
-static inline void
-amd_pmu_disable_event(struct hw_perf_event *hwc, int idx)
-{
-       x86_pmu_disable_event(hwc, idx);
-}
-
 static DEFINE_PER_CPU(u64 [X86_PMC_IDX_MAX], pmc_prev_left);
 
 /*
@@ -1723,15 +1728,14 @@ static void intel_pmu_enable_event(struct hw_perf_event *hwc, int idx)
                return;
        }
 
-       x86_pmu_enable_event(hwc, idx);
+       __x86_pmu_enable_event(hwc, idx);
 }
 
-static void amd_pmu_enable_event(struct hw_perf_event *hwc, int idx)
+static void x86_pmu_enable_event(struct hw_perf_event *hwc, int idx)
 {
        struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
-
        if (cpuc->enabled)
-               x86_pmu_enable_event(hwc, idx);
+               __x86_pmu_enable_event(hwc, idx);
 }
 
 /*
@@ -1988,50 +1992,6 @@ static void intel_pmu_reset(void)
        local_irq_restore(flags);
 }
 
-static int p6_pmu_handle_irq(struct pt_regs *regs)
-{
-       struct perf_sample_data data;
-       struct cpu_hw_events *cpuc;
-       struct perf_event *event;
-       struct hw_perf_event *hwc;
-       int idx, handled = 0;
-       u64 val;
-
-       data.addr = 0;
-       data.raw = NULL;
-
-       cpuc = &__get_cpu_var(cpu_hw_events);
-
-       for (idx = 0; idx < x86_pmu.num_events; idx++) {
-               if (!test_bit(idx, cpuc->active_mask))
-                       continue;
-
-               event = cpuc->events[idx];
-               hwc = &event->hw;
-
-               val = x86_perf_event_update(event, hwc, idx);
-               if (val & (1ULL << (x86_pmu.event_bits - 1)))
-                       continue;
-
-               /*
-                * event overflow
-                */
-               handled         = 1;
-               data.period     = event->hw.last_period;
-
-               if (!x86_perf_event_set_period(event, hwc, idx))
-                       continue;
-
-               if (perf_event_overflow(event, 1, &data, regs))
-                       p6_pmu_disable_event(hwc, idx);
-       }
-
-       if (handled)
-               inc_irq_stat(apic_perf_irqs);
-
-       return handled;
-}
-
 /*
  * This handler is triggered by the local APIC, so the APIC IRQ handling
  * rules apply:
@@ -2098,7 +2058,7 @@ again:
        return 1;
 }
 
-static int amd_pmu_handle_irq(struct pt_regs *regs)
+static int x86_pmu_handle_irq(struct pt_regs *regs)
 {
        struct perf_sample_data data;
        struct cpu_hw_events *cpuc;
@@ -2133,7 +2093,7 @@ static int amd_pmu_handle_irq(struct pt_regs *regs)
                        continue;
 
                if (perf_event_overflow(event, 1, &data, regs))
-                       amd_pmu_disable_event(hwc, idx);
+                       x86_pmu.disable(hwc, idx);
        }
 
        if (handled)
@@ -2374,7 +2334,7 @@ static __read_mostly struct notifier_block perf_event_nmi_notifier = {
 
 static __initconst struct x86_pmu p6_pmu = {
        .name                   = "p6",
-       .handle_irq             = p6_pmu_handle_irq,
+       .handle_irq             = x86_pmu_handle_irq,
        .disable_all            = p6_pmu_disable_all,
        .enable_all             = p6_pmu_enable_all,
        .enable                 = p6_pmu_enable_event,
@@ -2401,6 +2361,29 @@ static __initconst struct x86_pmu p6_pmu = {
        .event_constraints      = intel_p6_event_constraints
 };
 
+static __initconst struct x86_pmu core_pmu = {
+       .name                   = "core",
+       .handle_irq             = x86_pmu_handle_irq,
+       .disable_all            = x86_pmu_disable_all,
+       .enable_all             = x86_pmu_enable_all,
+       .enable                 = x86_pmu_enable_event,
+       .disable                = x86_pmu_disable_event,
+       .eventsel               = MSR_ARCH_PERFMON_EVENTSEL0,
+       .perfctr                = MSR_ARCH_PERFMON_PERFCTR0,
+       .event_map              = intel_pmu_event_map,
+       .raw_event              = intel_pmu_raw_event,
+       .max_events             = ARRAY_SIZE(intel_perfmon_event_map),
+       .apic                   = 1,
+       /*
+        * Intel PMCs cannot be accessed sanely above 32 bit width,
+        * so we install an artificial 1<<31 period regardless of
+        * the generic event period:
+        */
+       .max_period             = (1ULL << 31) - 1,
+       .get_event_constraints  = intel_get_event_constraints,
+       .event_constraints      = intel_core_event_constraints,
+};
+
 static __initconst struct x86_pmu intel_pmu = {
        .name                   = "Intel",
        .handle_irq             = intel_pmu_handle_irq,
@@ -2427,11 +2410,11 @@ static __initconst struct x86_pmu intel_pmu = {
 
 static __initconst struct x86_pmu amd_pmu = {
        .name                   = "AMD",
-       .handle_irq             = amd_pmu_handle_irq,
-       .disable_all            = amd_pmu_disable_all,
-       .enable_all             = amd_pmu_enable_all,
-       .enable                 = amd_pmu_enable_event,
-       .disable                = amd_pmu_disable_event,
+       .handle_irq             = x86_pmu_handle_irq,
+       .disable_all            = x86_pmu_disable_all,
+       .enable_all             = x86_pmu_enable_all,
+       .enable                 = x86_pmu_enable_event,
+       .disable                = x86_pmu_disable_event,
        .eventsel               = MSR_K7_EVNTSEL0,
        .perfctr                = MSR_K7_PERFCTR0,
        .event_map              = amd_pmu_event_map,
@@ -2498,9 +2481,10 @@ static __init int intel_pmu_init(void)
 
        version = eax.split.version_id;
        if (version < 2)
-               return -ENODEV;
+               x86_pmu = core_pmu;
+       else
+               x86_pmu = intel_pmu;
 
-       x86_pmu                         = intel_pmu;
        x86_pmu.version                 = version;
        x86_pmu.num_events              = eax.split.num_events;
        x86_pmu.event_bits              = eax.split.bit_width;
@@ -2510,12 +2494,17 @@ static __init int intel_pmu_init(void)
         * Quirk: v2 perfmon does not report fixed-purpose events, so
         * assume at least 3 events:
         */
-       x86_pmu.num_events_fixed        = max((int)edx.split.num_events_fixed, 3);
+       if (version > 1)
+               x86_pmu.num_events_fixed = max((int)edx.split.num_events_fixed, 3);
 
        /*
         * Install the hw-cache-events table:
         */
        switch (boot_cpu_data.x86_model) {
+       case 14: /* 65 nm core solo/duo, "Yonah" */
+               pr_cont("Core events, ");
+               break;
+
        case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
        case 22: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
        case 23: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
@@ -2523,7 +2512,7 @@ static __init int intel_pmu_init(void)
                memcpy(hw_cache_event_ids, core2_hw_cache_event_ids,
                       sizeof(hw_cache_event_ids));
 
-               x86_pmu.event_constraints = intel_core_event_constraints;
+               x86_pmu.event_constraints = intel_core2_event_constraints;
                pr_cont("Core2 events, ");
                break;