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
77 bool is_ppc64le(void);
78 int using_hash_mmu(bool *using_hash);
79
80 /* Yes, this is evil */
81 #define FAIL_IF(x) \
82 do { \
83 if ((x)) { \
84 fprintf(stderr, \
85 "[FAIL] Test FAILED on line %d\n", __LINE__); \
86 return 1; \
87 } \
88 } while (0)
89
90 #define FAIL_IF_EXIT(x) \
91 do { \
92 if ((x)) { \
93 fprintf(stderr, \
94 "[FAIL] Test FAILED on line %d\n", __LINE__); \
95 _exit(1); \
96 } \
97 } while (0)
98
99 /* The test harness uses this, yes it's gross */
100 #define MAGIC_SKIP_RETURN_VALUE 99
101
102 #define SKIP_IF(x) \
103 do { \
104 if ((x)) { \
105 fprintf(stderr, \
106 "[SKIP] Test skipped on line %d\n", __LINE__); \
107 return MAGIC_SKIP_RETURN_VALUE; \
108 } \
109 } while (0)
110
111 #define SKIP_IF_MSG(x, msg) \
112 do { \
113 if ((x)) { \
114 fprintf(stderr, \
115 "[SKIP] Test skipped on line %d: %s\n", \
116 __LINE__, msg); \
117 return MAGIC_SKIP_RETURN_VALUE; \
118 } \
119 } while (0)
120
121 #define _str(s) #s
122 #define str(s) _str(s)
123
124 #define sigsafe_err(msg) ({ \
125 ssize_t nbytes __attribute__((unused)); \
126 nbytes = write(STDERR_FILENO, msg, strlen(msg)); })
127
128 /* POWER9 feature */
129 #ifndef PPC_FEATURE2_ARCH_3_00
130 #define PPC_FEATURE2_ARCH_3_00 0x00800000
131 #endif
132
133 /* POWER10 feature */
134 #ifndef PPC_FEATURE2_ARCH_3_1
135 #define PPC_FEATURE2_ARCH_3_1 0x00040000
136 #endif
137
138 #if defined(__powerpc64__)
139 #define UCONTEXT_NIA(UC) (UC)->uc_mcontext.gp_regs[PT_NIP]
140 #define UCONTEXT_MSR(UC) (UC)->uc_mcontext.gp_regs[PT_MSR]
141 #elif defined(__powerpc__)
142 #define UCONTEXT_NIA(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_NIP]
143 #define UCONTEXT_MSR(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_MSR]
144 #else
145 #error implement UCONTEXT_NIA
146 #endif
147
148 #endif /* _SELFTESTS_POWERPC_UTILS_H */
149
