summaryrefslogtreecommitdiffstats
path: root/arch/x86/include/asm/perf_counter.h
blob: fa64e401589d4ed9089c908f06c3bef2261c4d9f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
#ifndef _ASM_X86_PERF_COUNTER_H
#define _ASM_X86_PERF_COUNTER_H

/*
 * Performance counter hw details:
 */

#define X86_PMC_MAX_GENERIC					8
#define X86_PMC_MAX_FIXED					3

#define X86_PMC_IDX_GENERIC				        0
#define X86_PMC_IDX_FIXED				       32
#define X86_PMC_IDX_MAX					       64

#define MSR_ARCH_PERFMON_PERFCTR0			      0xc1
#define MSR_ARCH_PERFMON_PERFCTR1			      0xc2

#define MSR_ARCH_PERFMON_EVENTSEL0			     0x186
#define MSR_ARCH_PERFMON_EVENTSEL1			     0x187

#define ARCH_PERFMON_EVENTSEL0_ENABLE			  (1 << 22)
#define ARCH_PERFMON_EVENTSEL_INT			  (1 << 20)
#define ARCH_PERFMON_EVENTSEL_OS			  (1 << 17)
#define ARCH_PERFMON_EVENTSEL_USR			  (1 << 16)

/*
 * Includes eventsel and unit mask as well:
 */
#define ARCH_PERFMON_EVENT_MASK				    0xffff

#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_SEL		      0x3c
#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_UMASK		(0x00 << 8)
#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX 		 0
#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_PRESENT \
		(1 << (ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX))

#define ARCH_PERFMON_BRANCH_MISSES_RETIRED			 6

/*
 * Intel "Architectural Performance Monitoring" CPUID
 * detection/enumeration details:
 */
union cpuid10_eax {
	struct {
		unsigned int version_id:8;
		unsigned int num_counters:8;
		unsigned int bit_width:8;
		unsigned int mask_length:8;
	} split;
	unsigned int full;
};

union cpuid10_edx {
	struct {
		unsigned int num_counters_fixed:4;
		unsigned int reserved:28;
	} split;
	unsigned int full;
};


/*
 * Fixed-purpose performance counters:
 */

/*
 * All 3 fixed-mode PMCs are configured via this single MSR:
 */
#define MSR_ARCH_PERFMON_FIXED_CTR_CTRL			0x38d

/*
 * The counts are available in three separate MSRs:
 */

/* Instr_Retired.Any: */
#define MSR_ARCH_PERFMON_FIXED_CTR0			0x309
#define X86_PMC_IDX_FIXED_INSTRUCTIONS			(X86_PMC_IDX_FIXED + 0)

/* CPU_CLK_Unhalted.Core: */
#define MSR_ARCH_PERFMON_FIXED_CTR1			0x30a
#define X86_PMC_IDX_FIXED_CPU_CYCLES			(X86_PMC_IDX_FIXED + 1)

/* CPU_CLK_Unhalted.Ref: */
#define MSR_ARCH_PERFMON_FIXED_CTR2			0x30b
#define X86_PMC_IDX_FIXED_BUS_CYCLES			(X86_PMC_IDX_FIXED + 2)

#ifdef CONFIG_PERF_COUNTERS
extern void init_hw_perf_counters(void);
extern void perf_counters_lapic_init(void);

#define PERF_COUNTER_INDEX_OFFSET			0

#else
static inline void init_hw_perf_counters(void)		{ }
static inline void perf_counters_lapic_init(void)	{ }
#endif

#endif /* _ASM_X86_PERF_COUNTER_H */