1 #ifndef _PERF_PERF_H
2 #define _PERF_PERF_H
3
4 struct winsize;
5
6 void get_term_dimensions(struct winsize *ws);
7
8 #if defined(__i386__)
9 #include "../../arch/x86/include/asm/unistd.h"
10 #define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
11 #define cpu_relax() asm volatile("rep; nop" ::: "memory");
12 #endif
13
14 #if defined(__x86_64__)
15 #include "../../arch/x86/include/asm/unistd.h"
16 #define rmb() asm volatile("lfence" ::: "memory")
17 #define cpu_relax() asm volatile("rep; nop" ::: "memory");
18 #endif
19
20 #ifdef __powerpc__
21 #include "../../arch/powerpc/include/asm/unistd.h"
22 #define rmb() asm volatile ("sync" ::: "memory")
23 #define cpu_relax() asm volatile ("" ::: "memory");
24 #endif
25
26 #ifdef __s390__
27 #include "../../arch/s390/include/asm/unistd.h"
28 #define rmb() asm volatile("bcr 15,0" ::: "memory")
29 #define cpu_relax() asm volatile("" ::: "memory");
30 #endif
31
32 #ifdef __sh__
33 #include "../../arch/sh/include/asm/unistd.h"
34 #if defined(__SH4A__) || defined(__SH5__)
35 # define rmb() asm volatile("synco" ::: "memory")
36 #else
37 # define rmb() asm volatile("" ::: "memory")
38 #endif
39 #define cpu_relax() asm volatile("" ::: "memory")
40 #endif
41
42 #ifdef __hppa__
43 #include "../../arch/parisc/include/asm/unistd.h"
44 #define rmb() asm volatile("" ::: "memory")
45 #define cpu_relax() asm volatile("" ::: "memory");
46 #endif
47
48 #ifdef __sparc__
49 #include "../../arch/sparc/include/asm/unistd.h"
50 #define rmb() asm volatile("":::"memory")
51 #define cpu_relax() asm volatile("":::"memory")
52 #endif
53
54 #ifdef __alpha__
55 #include "../../arch/alpha/include/asm/unistd.h"
56 #define rmb() asm volatile("mb" ::: "memory")
57 #define cpu_relax() asm volatile("" ::: "memory")
58 #endif
59
60 #ifdef __ia64__
61 #include "../../arch/ia64/include/asm/unistd.h"
62 #define rmb() asm volatile ("mf" ::: "memory")
63 #define cpu_relax() asm volatile ("hint @pause" ::: "memory")
64 #endif
65
66 #ifdef __arm__
67 #include "../../arch/arm/include/asm/unistd.h"
68 /*
69 * Use the __kuser_memory_barrier helper in the CPU helper page. See
70 * arch/arm/kernel/entry-armv.S in the kernel source for details.
71 */
72 #define rmb() ((void(*)(void))0xffff0fa0)()
73 #define cpu_relax() asm volatile("":::"memory")
74 #endif
75
76 #ifdef __mips__
77 #include "../../arch/mips/include/asm/unistd.h"
78 #define rmb() asm volatile( \
79 ".set mips2\n\t" \
80 "sync\n\t" \
81 ".set mips0" \
82 : /* no output */ \
83 : /* no input */ \
84 : "memory")
85 #define cpu_relax() asm volatile("" ::: "memory")
86 #endif
87
88 #include <time.h>
89 #include <unistd.h>
90 #include <sys/types.h>
91 #include <sys/syscall.h>
92
93 #include "../../include/linux/perf_event.h"
94 #include "util/types.h"
95 #include <stdbool.h>
96
97 struct perf_mmap {
98 void *base;
99 int mask;
100 unsigned int prev;
101 };
102
perf_mmap__read_head(struct perf_mmap * mm)103 static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
104 {
105 struct perf_event_mmap_page *pc = mm->base;
106 int head = pc->data_head;
107 rmb();
108 return head;
109 }
110
perf_mmap__write_tail(struct perf_mmap * md,unsigned long tail)111 static inline void perf_mmap__write_tail(struct perf_mmap *md,
112 unsigned long tail)
113 {
114 struct perf_event_mmap_page *pc = md->base;
115
116 /*
117 * ensure all reads are done before we write the tail out.
118 */
119 /* mb(); */
120 pc->data_tail = tail;
121 }
122
123 /*
124 * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
125 * counters in the current task.
126 */
127 #define PR_TASK_PERF_EVENTS_DISABLE 31
128 #define PR_TASK_PERF_EVENTS_ENABLE 32
129
130 #ifndef NSEC_PER_SEC
131 # define NSEC_PER_SEC 1000000000ULL
132 #endif
133
rdclock(void)134 static inline unsigned long long rdclock(void)
135 {
136 struct timespec ts;
137
138 clock_gettime(CLOCK_MONOTONIC, &ts);
139 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
140 }
141
142 /*
143 * Pick up some kernel type conventions:
144 */
145 #define __user
146 #define asmlinkage
147
148 #define unlikely(x) __builtin_expect(!!(x), 0)
149 #define min(x, y) ({ \
150 typeof(x) _min1 = (x); \
151 typeof(y) _min2 = (y); \
152 (void) (&_min1 == &_min2); \
153 _min1 < _min2 ? _min1 : _min2; })
154
155 static inline int
sys_perf_event_open(struct perf_event_attr * attr,pid_t pid,int cpu,int group_fd,unsigned long flags)156 sys_perf_event_open(struct perf_event_attr *attr,
157 pid_t pid, int cpu, int group_fd,
158 unsigned long flags)
159 {
160 attr->size = sizeof(*attr);
161 return syscall(__NR_perf_event_open, attr, pid, cpu,
162 group_fd, flags);
163 }
164
165 #define MAX_COUNTERS 256
166 #define MAX_NR_CPUS 256
167
168 struct ip_callchain {
169 u64 nr;
170 u64 ips[0];
171 };
172
173 extern bool perf_host, perf_guest;
174
175 #endif
176