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 */
19 typedef unsigned long long u64;
20 typedef signed long long s64;
21
22 /* Just for familiarity */
23 typedef uint32_t u32;
24 typedef uint16_t u16;
25 typedef uint8_t u8;
26
27 void test_harness_set_timeout(uint64_t time);
28 int test_harness(int (test_function)(void), char *name);
29
30 int read_auxv(char *buf, ssize_t buf_size);
31 void *find_auxv_entry(int type, char *auxv);
32 void *get_auxv_entry(int type);
33
34 int pick_online_cpu(void);
35
36 int read_debugfs_file(char *debugfs_file, int *result);
37 int write_debugfs_file(char *debugfs_file, int result);
38 int read_sysfs_file(char *debugfs_file, char *result, size_t result_size);
39 int perf_event_open_counter(unsigned int type,
40 unsigned long config, int group_fd);
41 int perf_event_enable(int fd);
42 int perf_event_disable(int fd);
43 int perf_event_reset(int fd);
44
45 struct 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
gettid(void)54 static inline pid_t gettid(void)
55 {
56 return syscall(SYS_gettid);
57 }
58 #endif
59
have_hwcap(unsigned long ftr)60 static 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
have_hwcap2(unsigned long ftr2)66 static inline bool have_hwcap2(unsigned long ftr2)
67 {
68 return ((unsigned long)get_auxv_entry(AT_HWCAP2) & ftr2) == ftr2;
69 }
70 #else
have_hwcap2(unsigned long ftr2)71 static inline bool have_hwcap2(unsigned long ftr2)
72 {
73 return false;
74 }
75 #endif
76
auxv_base_platform(void)77 static inline char *auxv_base_platform(void)
78 {
79 return ((char *)get_auxv_entry(AT_BASE_PLATFORM));
80 }
81
auxv_platform(void)82 static inline char *auxv_platform(void)
83 {
84 return ((char *)get_auxv_entry(AT_PLATFORM));
85 }
86
87 bool is_ppc64le(void);
88 int using_hash_mmu(bool *using_hash);
89
90 /* Yes, this is evil */
91 #define FAIL_IF(x) \
92 do { \
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) \
101 do { \
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) \
113 do { \
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) \
122 do { \
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 */
164