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#define CPUINFO_PROC "vendor_id"
58#endif
59
60#ifdef __sh__
61#if defined(__SH4A__) || defined(__SH5__)
62# define mb() asm volatile("synco" ::: "memory")
63# define wmb() asm volatile("synco" ::: "memory")
64# define rmb() asm volatile("synco" ::: "memory")
65#else
66# define mb() asm volatile("" ::: "memory")
67# define wmb() asm volatile("" ::: "memory")
68# define rmb() asm volatile("" ::: "memory")
69#endif
70#define CPUINFO_PROC "cpu type"
71#endif
72
73#ifdef __hppa__
74#define mb() asm volatile("" ::: "memory")
75#define wmb() asm volatile("" ::: "memory")
76#define rmb() asm volatile("" ::: "memory")
77#define CPUINFO_PROC "cpu"
78#endif
79
80#ifdef __sparc__
81#ifdef __LP64__
82#define mb() asm volatile("ba,pt %%xcc, 1f\n" \
83 "membar #StoreLoad\n" \
84 "1:\n":::"memory")
85#else
86#define mb() asm volatile("":::"memory")
87#endif
88#define wmb() asm volatile("":::"memory")
89#define rmb() asm volatile("":::"memory")
90#define CPUINFO_PROC "cpu"
91#endif
92
93#ifdef __alpha__
94#define mb() asm volatile("mb" ::: "memory")
95#define wmb() asm volatile("wmb" ::: "memory")
96#define rmb() asm volatile("mb" ::: "memory")
97#define CPUINFO_PROC "cpu model"
98#endif
99
100#ifdef __ia64__
101#define mb() asm volatile ("mf" ::: "memory")
102#define wmb() asm volatile ("mf" ::: "memory")
103#define rmb() asm volatile ("mf" ::: "memory")
104#define cpu_relax() asm volatile ("hint @pause" ::: "memory")
105#define CPUINFO_PROC "model name"
106#endif
107
108#ifdef __arm__
109/*
110 * Use the __kuser_memory_barrier helper in the CPU helper page. See
111 * arch/arm/kernel/entry-armv.S in the kernel source for details.
112 */
113#define mb() ((void(*)(void))0xffff0fa0)()
114#define wmb() ((void(*)(void))0xffff0fa0)()
115#define rmb() ((void(*)(void))0xffff0fa0)()
116#define CPUINFO_PROC "Processor"
117#endif
118
119#ifdef __aarch64__
120#define mb() asm volatile("dmb ish" ::: "memory")
121#define wmb() asm volatile("dmb ishst" ::: "memory")
122#define rmb() asm volatile("dmb ishld" ::: "memory")
123#define cpu_relax() asm volatile("yield" ::: "memory")
124#endif
125
126#ifdef __mips__
127#define mb() asm volatile( \
128 ".set mips2\n\t" \
129 "sync\n\t" \
130 ".set mips0" \
131 : /* no output */ \
132 : /* no input */ \
133 : "memory")
134#define wmb() mb()
135#define rmb() mb()
136#define CPUINFO_PROC "cpu model"
137#endif
138
139#ifdef __arc__
140#define mb() asm volatile("" ::: "memory")
141#define wmb() asm volatile("" ::: "memory")
142#define rmb() asm volatile("" ::: "memory")
143#define CPUINFO_PROC "Processor"
144#endif
145
146#ifdef __metag__
147#define mb() asm volatile("" ::: "memory")
148#define wmb() asm volatile("" ::: "memory")
149#define rmb() asm volatile("" ::: "memory")
150#define CPUINFO_PROC "CPU"
151#endif
152
153#ifdef __xtensa__
154#define mb() asm volatile("memw" ::: "memory")
155#define wmb() asm volatile("memw" ::: "memory")
156#define rmb() asm volatile("" ::: "memory")
157#define CPUINFO_PROC "core ID"
158#endif
159
160#ifdef __tile__
161#define mb() asm volatile ("mf" ::: "memory")
162#define wmb() asm volatile ("mf" ::: "memory")
163#define rmb() asm volatile ("mf" ::: "memory")
164#define cpu_relax() asm volatile ("mfspr zero, PASS" ::: "memory")
165#define CPUINFO_PROC "model name"
166#endif
167
168#define barrier() asm volatile ("" ::: "memory")
169
170#ifndef cpu_relax
171#define cpu_relax() barrier()
172#endif
173
174static inline int
175sys_perf_event_open(struct perf_event_attr *attr,
176 pid_t pid, int cpu, int group_fd,
177 unsigned long flags)
178{
179 int fd;
180
181 fd = syscall(__NR_perf_event_open, attr, pid, cpu,
182 group_fd, flags);
183
184#ifdef HAVE_ATTR_TEST
185 if (unlikely(test_attr__enabled))
186 test_attr__open(attr, pid, cpu, fd, group_fd, flags);
187#endif
188 return fd;
189}
190
191#endif /* _PERF_SYS_H */