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de0428a7 KW |
1 | #include <linux/perf_event.h> |
2 | #include <linux/types.h> | |
3 | ||
4 | #include "perf_event.h" | |
f22f54f4 PZ |
5 | |
6 | /* | |
7 | * Not sure about some of these | |
8 | */ | |
9 | static const u64 p6_perfmon_event_map[] = | |
10 | { | |
11 | [PERF_COUNT_HW_CPU_CYCLES] = 0x0079, | |
12 | [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0, | |
13 | [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0f2e, | |
14 | [PERF_COUNT_HW_CACHE_MISSES] = 0x012e, | |
15 | [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4, | |
16 | [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5, | |
17 | [PERF_COUNT_HW_BUS_CYCLES] = 0x0062, | |
18 | }; | |
19 | ||
20 | static u64 p6_pmu_event_map(int hw_event) | |
21 | { | |
22 | return p6_perfmon_event_map[hw_event]; | |
23 | } | |
24 | ||
25 | /* | |
26 | * Event setting that is specified not to count anything. | |
27 | * We use this to effectively disable a counter. | |
28 | * | |
29 | * L2_RQSTS with 0 MESI unit mask. | |
30 | */ | |
31 | #define P6_NOP_EVENT 0x0000002EULL | |
32 | ||
f22f54f4 PZ |
33 | static struct event_constraint p6_event_constraints[] = |
34 | { | |
35 | INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FLOPS */ | |
36 | INTEL_EVENT_CONSTRAINT(0x10, 0x1), /* FP_COMP_OPS_EXE */ | |
37 | INTEL_EVENT_CONSTRAINT(0x11, 0x1), /* FP_ASSIST */ | |
38 | INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */ | |
39 | INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */ | |
40 | INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */ | |
41 | EVENT_CONSTRAINT_END | |
42 | }; | |
43 | ||
44 | static void p6_pmu_disable_all(void) | |
45 | { | |
46 | u64 val; | |
47 | ||
48 | /* p6 only has one enable register */ | |
49 | rdmsrl(MSR_P6_EVNTSEL0, val); | |
bb1165d6 | 50 | val &= ~ARCH_PERFMON_EVENTSEL_ENABLE; |
f22f54f4 PZ |
51 | wrmsrl(MSR_P6_EVNTSEL0, val); |
52 | } | |
53 | ||
11164cd4 | 54 | static void p6_pmu_enable_all(int added) |
f22f54f4 PZ |
55 | { |
56 | unsigned long val; | |
57 | ||
58 | /* p6 only has one enable register */ | |
59 | rdmsrl(MSR_P6_EVNTSEL0, val); | |
bb1165d6 | 60 | val |= ARCH_PERFMON_EVENTSEL_ENABLE; |
f22f54f4 PZ |
61 | wrmsrl(MSR_P6_EVNTSEL0, val); |
62 | } | |
63 | ||
64 | static inline void | |
aff3d91a | 65 | p6_pmu_disable_event(struct perf_event *event) |
f22f54f4 PZ |
66 | { |
67 | struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); | |
aff3d91a | 68 | struct hw_perf_event *hwc = &event->hw; |
f22f54f4 PZ |
69 | u64 val = P6_NOP_EVENT; |
70 | ||
71 | if (cpuc->enabled) | |
bb1165d6 | 72 | val |= ARCH_PERFMON_EVENTSEL_ENABLE; |
f22f54f4 | 73 | |
73d6e522 | 74 | (void)checking_wrmsrl(hwc->config_base, val); |
f22f54f4 PZ |
75 | } |
76 | ||
aff3d91a | 77 | static void p6_pmu_enable_event(struct perf_event *event) |
f22f54f4 PZ |
78 | { |
79 | struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); | |
aff3d91a | 80 | struct hw_perf_event *hwc = &event->hw; |
f22f54f4 PZ |
81 | u64 val; |
82 | ||
83 | val = hwc->config; | |
84 | if (cpuc->enabled) | |
bb1165d6 | 85 | val |= ARCH_PERFMON_EVENTSEL_ENABLE; |
f22f54f4 | 86 | |
73d6e522 | 87 | (void)checking_wrmsrl(hwc->config_base, val); |
f22f54f4 PZ |
88 | } |
89 | ||
caaa8be3 | 90 | static __initconst const struct x86_pmu p6_pmu = { |
f22f54f4 PZ |
91 | .name = "p6", |
92 | .handle_irq = x86_pmu_handle_irq, | |
93 | .disable_all = p6_pmu_disable_all, | |
94 | .enable_all = p6_pmu_enable_all, | |
95 | .enable = p6_pmu_enable_event, | |
96 | .disable = p6_pmu_disable_event, | |
b4cdc5c2 | 97 | .hw_config = x86_pmu_hw_config, |
a072738e | 98 | .schedule_events = x86_schedule_events, |
f22f54f4 PZ |
99 | .eventsel = MSR_P6_EVNTSEL0, |
100 | .perfctr = MSR_P6_PERFCTR0, | |
101 | .event_map = p6_pmu_event_map, | |
f22f54f4 PZ |
102 | .max_events = ARRAY_SIZE(p6_perfmon_event_map), |
103 | .apic = 1, | |
104 | .max_period = (1ULL << 31) - 1, | |
105 | .version = 0, | |
948b1bb8 | 106 | .num_counters = 2, |
f22f54f4 PZ |
107 | /* |
108 | * Events have 40 bits implemented. However they are designed such | |
109 | * that bits [32-39] are sign extensions of bit 31. As such the | |
110 | * effective width of a event for P6-like PMU is 32 bits only. | |
111 | * | |
112 | * See IA-32 Intel Architecture Software developer manual Vol 3B | |
113 | */ | |
948b1bb8 RR |
114 | .cntval_bits = 32, |
115 | .cntval_mask = (1ULL << 32) - 1, | |
f22f54f4 PZ |
116 | .get_event_constraints = x86_get_event_constraints, |
117 | .event_constraints = p6_event_constraints, | |
118 | }; | |
119 | ||
de0428a7 | 120 | __init int p6_pmu_init(void) |
f22f54f4 PZ |
121 | { |
122 | switch (boot_cpu_data.x86_model) { | |
123 | case 1: | |
124 | case 3: /* Pentium Pro */ | |
125 | case 5: | |
126 | case 6: /* Pentium II */ | |
127 | case 7: | |
128 | case 8: | |
129 | case 11: /* Pentium III */ | |
130 | case 9: | |
131 | case 13: | |
132 | /* Pentium M */ | |
133 | break; | |
134 | default: | |
135 | pr_cont("unsupported p6 CPU model %d ", | |
136 | boot_cpu_data.x86_model); | |
137 | return -ENODEV; | |
138 | } | |
139 | ||
140 | x86_pmu = p6_pmu; | |
141 | ||
142 | return 0; | |
143 | } |