Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright 2013, Michael Ellerman, IBM Corp.
4 */
5
6#ifndef _SELFTESTS_POWERPC_UTILS_H
7#define _SELFTESTS_POWERPC_UTILS_H
8
9#define __cacheline_aligned __attribute__((aligned(128)))
10
11#include <stdint.h>
12#include <stdbool.h>
13#include <linux/auxvec.h>
14#include <linux/perf_event.h>
15#include <asm/cputable.h>
16#include "reg.h"
17
18/* Avoid headaches with PRI?64 - just use %ll? always */
19typedef unsigned long long u64;
20typedef signed long long s64;
21
22/* Just for familiarity */
23typedef uint32_t u32;
24typedef uint16_t u16;
25typedef uint8_t u8;
26
27void test_harness_set_timeout(uint64_t time);
28int test_harness(int (test_function)(void), char *name);
29
30int read_auxv(char *buf, ssize_t buf_size);
31void *find_auxv_entry(int type, char *auxv);
32void *get_auxv_entry(int type);
33
34int pick_online_cpu(void);
35
36int read_debugfs_file(char *debugfs_file, int *result);
37int write_debugfs_file(char *debugfs_file, int result);
38int read_sysfs_file(char *debugfs_file, char *result, size_t result_size);
39int perf_event_open_counter(unsigned int type,
40 unsigned long config, int group_fd);
41int perf_event_enable(int fd);
42int perf_event_disable(int fd);
43int perf_event_reset(int fd);
44
45struct perf_event_read {
46 __u64 nr;
47 __u64 l1d_misses;
48};
49
50#if !defined(__GLIBC_PREREQ) || !__GLIBC_PREREQ(2, 30)
51#include <unistd.h>
52#include <sys/syscall.h>
53
54static inline pid_t gettid(void)
55{
56 return syscall(SYS_gettid);
57}
58#endif
59
60static inline bool have_hwcap(unsigned long ftr)
61{
62 return ((unsigned long)get_auxv_entry(AT_HWCAP) & ftr) == ftr;
63}
64
65#ifdef AT_HWCAP2
66static inline bool have_hwcap2(unsigned long ftr2)
67{
68 return ((unsigned long)get_auxv_entry(AT_HWCAP2) & ftr2) == ftr2;
69}
70#else
71static inline bool have_hwcap2(unsigned long ftr2)
72{
73 return false;
74}
75#endif
76
77static inline char *auxv_base_platform(void)
78{
79 return ((char *)get_auxv_entry(AT_BASE_PLATFORM));
80}
81
82static inline char *auxv_platform(void)
83{
84 return ((char *)get_auxv_entry(AT_PLATFORM));
85}
86
87bool is_ppc64le(void);
88int using_hash_mmu(bool *using_hash);
89
90/* Yes, this is evil */
91#define FAIL_IF(x) \
92do { \
93 if ((x)) { \
94 fprintf(stderr, \
95 "[FAIL] Test FAILED on line %d\n", __LINE__); \
96 return 1; \
97 } \
98} while (0)
99
100#define FAIL_IF_EXIT(x) \
101do { \
102 if ((x)) { \
103 fprintf(stderr, \
104 "[FAIL] Test FAILED on line %d\n", __LINE__); \
105 _exit(1); \
106 } \
107} while (0)
108
109/* The test harness uses this, yes it's gross */
110#define MAGIC_SKIP_RETURN_VALUE 99
111
112#define SKIP_IF(x) \
113do { \
114 if ((x)) { \
115 fprintf(stderr, \
116 "[SKIP] Test skipped on line %d\n", __LINE__); \
117 return MAGIC_SKIP_RETURN_VALUE; \
118 } \
119} while (0)
120
121#define SKIP_IF_MSG(x, msg) \
122do { \
123 if ((x)) { \
124 fprintf(stderr, \
125 "[SKIP] Test skipped on line %d: %s\n", \
126 __LINE__, msg); \
127 return MAGIC_SKIP_RETURN_VALUE; \
128 } \
129} while (0)
130
131#define _str(s) #s
132#define str(s) _str(s)
133
134#define sigsafe_err(msg) ({ \
135 ssize_t nbytes __attribute__((unused)); \
136 nbytes = write(STDERR_FILENO, msg, strlen(msg)); })
137
138/* POWER9 feature */
139#ifndef PPC_FEATURE2_ARCH_3_00
140#define PPC_FEATURE2_ARCH_3_00 0x00800000
141#endif
142
143/* POWER10 feature */
144#ifndef PPC_FEATURE2_ARCH_3_1
145#define PPC_FEATURE2_ARCH_3_1 0x00040000
146#endif
147
148/* POWER10 features */
149#ifndef PPC_FEATURE2_MMA
150#define PPC_FEATURE2_MMA 0x00020000
151#endif
152
153#if defined(__powerpc64__)
154#define UCONTEXT_NIA(UC) (UC)->uc_mcontext.gp_regs[PT_NIP]
155#define UCONTEXT_MSR(UC) (UC)->uc_mcontext.gp_regs[PT_MSR]
156#elif defined(__powerpc__)
157#define UCONTEXT_NIA(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_NIP]
158#define UCONTEXT_MSR(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_MSR]
159#else
160#error implement UCONTEXT_NIA
161#endif
162
163#endif /* _SELFTESTS_POWERPC_UTILS_H */