Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _PERF_SYS_H
2#define _PERF_SYS_H
3
4#include <unistd.h>
5#include <sys/types.h>
6#include <sys/syscall.h>
7#include <linux/types.h>
8#include <linux/perf_event.h>
9#include <asm/unistd.h>
10
11#if defined(__i386__)
12#define mb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
13#define wmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
14#define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
15#define cpu_relax() asm volatile("rep; nop" ::: "memory");
16#define CPUINFO_PROC "model name"
17#ifndef __NR_perf_event_open
18# define __NR_perf_event_open 336
19#endif
20#ifndef __NR_futex
21# define __NR_futex 240
22#endif
23#ifndef __NR_gettid
24# define __NR_gettid 224
25#endif
26#endif
27
28#if defined(__x86_64__)
29#define mb() asm volatile("mfence" ::: "memory")
30#define wmb() asm volatile("sfence" ::: "memory")
31#define rmb() asm volatile("lfence" ::: "memory")
32#define cpu_relax() asm volatile("rep; nop" ::: "memory");
33#define CPUINFO_PROC "model name"
34#ifndef __NR_perf_event_open
35# define __NR_perf_event_open 298
36#endif
37#ifndef __NR_futex
38# define __NR_futex 202
39#endif
40#ifndef __NR_gettid
41# define __NR_gettid 186
42#endif
43#endif
44
45#ifdef __powerpc__
46#include "../../arch/powerpc/include/uapi/asm/unistd.h"
47#define mb() asm volatile ("sync" ::: "memory")
48#define wmb() asm volatile ("sync" ::: "memory")
49#define rmb() asm volatile ("sync" ::: "memory")
50#define CPUINFO_PROC "cpu"
51#endif
52
53#ifdef __s390__
54#define mb() asm volatile("bcr 15,0" ::: "memory")
55#define wmb() asm volatile("bcr 15,0" ::: "memory")
56#define rmb() asm volatile("bcr 15,0" ::: "memory")
57#endif
58
59#ifdef __sh__
60#if defined(__SH4A__) || defined(__SH5__)
61# define mb() asm volatile("synco" ::: "memory")
62# define wmb() asm volatile("synco" ::: "memory")
63# define rmb() asm volatile("synco" ::: "memory")
64#else
65# define mb() asm volatile("" ::: "memory")
66# define wmb() asm volatile("" ::: "memory")
67# define rmb() asm volatile("" ::: "memory")
68#endif
69#define CPUINFO_PROC "cpu type"
70#endif
71
72#ifdef __hppa__
73#define mb() asm volatile("" ::: "memory")
74#define wmb() asm volatile("" ::: "memory")
75#define rmb() asm volatile("" ::: "memory")
76#define CPUINFO_PROC "cpu"
77#endif
78
79#ifdef __sparc__
80#ifdef __LP64__
81#define mb() asm volatile("ba,pt %%xcc, 1f\n" \
82 "membar #StoreLoad\n" \
83 "1:\n":::"memory")
84#else
85#define mb() asm volatile("":::"memory")
86#endif
87#define wmb() asm volatile("":::"memory")
88#define rmb() asm volatile("":::"memory")
89#define CPUINFO_PROC "cpu"
90#endif
91
92#ifdef __alpha__
93#define mb() asm volatile("mb" ::: "memory")
94#define wmb() asm volatile("wmb" ::: "memory")
95#define rmb() asm volatile("mb" ::: "memory")
96#define CPUINFO_PROC "cpu model"
97#endif
98
99#ifdef __ia64__
100#define mb() asm volatile ("mf" ::: "memory")
101#define wmb() asm volatile ("mf" ::: "memory")
102#define rmb() asm volatile ("mf" ::: "memory")
103#define cpu_relax() asm volatile ("hint @pause" ::: "memory")
104#define CPUINFO_PROC "model name"
105#endif
106
107#ifdef __arm__
108/*
109 * Use the __kuser_memory_barrier helper in the CPU helper page. See
110 * arch/arm/kernel/entry-armv.S in the kernel source for details.
111 */
112#define mb() ((void(*)(void))0xffff0fa0)()
113#define wmb() ((void(*)(void))0xffff0fa0)()
114#define rmb() ((void(*)(void))0xffff0fa0)()
115#define CPUINFO_PROC "Processor"
116#endif
117
118#ifdef __aarch64__
119#define mb() asm volatile("dmb ish" ::: "memory")
120#define wmb() asm volatile("dmb ishst" ::: "memory")
121#define rmb() asm volatile("dmb ishld" ::: "memory")
122#define cpu_relax() asm volatile("yield" ::: "memory")
123#endif
124
125#ifdef __mips__
126#define mb() asm volatile( \
127 ".set mips2\n\t" \
128 "sync\n\t" \
129 ".set mips0" \
130 : /* no output */ \
131 : /* no input */ \
132 : "memory")
133#define wmb() mb()
134#define rmb() mb()
135#define CPUINFO_PROC "cpu model"
136#endif
137
138#ifdef __arc__
139#define mb() asm volatile("" ::: "memory")
140#define wmb() asm volatile("" ::: "memory")
141#define rmb() asm volatile("" ::: "memory")
142#define CPUINFO_PROC "Processor"
143#endif
144
145#ifdef __metag__
146#define mb() asm volatile("" ::: "memory")
147#define wmb() asm volatile("" ::: "memory")
148#define rmb() asm volatile("" ::: "memory")
149#define CPUINFO_PROC "CPU"
150#endif
151
152#ifdef __xtensa__
153#define mb() asm volatile("memw" ::: "memory")
154#define wmb() asm volatile("memw" ::: "memory")
155#define rmb() asm volatile("" ::: "memory")
156#define CPUINFO_PROC "core ID"
157#endif
158
159#ifdef __tile__
160#define mb() asm volatile ("mf" ::: "memory")
161#define wmb() asm volatile ("mf" ::: "memory")
162#define rmb() asm volatile ("mf" ::: "memory")
163#define cpu_relax() asm volatile ("mfspr zero, PASS" ::: "memory")
164#define CPUINFO_PROC "model name"
165#endif
166
167#define barrier() asm volatile ("" ::: "memory")
168
169#ifndef cpu_relax
170#define cpu_relax() barrier()
171#endif
172
173static inline int
174sys_perf_event_open(struct perf_event_attr *attr,
175 pid_t pid, int cpu, int group_fd,
176 unsigned long flags)
177{
178 int fd;
179
180 fd = syscall(__NR_perf_event_open, attr, pid, cpu,
181 group_fd, flags);
182
183#ifdef HAVE_ATTR_TEST
184 if (unlikely(test_attr__enabled))
185 test_attr__open(attr, pid, cpu, fd, group_fd, flags);
186#endif
187 return fd;
188}
189
190#endif /* _PERF_SYS_H */