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 parse_intmax(const char *buffer, size_t count, intmax_t *result, int base); 37 int parse_uintmax(const char *buffer, size_t count, uintmax_t *result, int base); 38 int parse_int(const char *buffer, size_t count, int *result, int base); 39 int parse_uint(const char *buffer, size_t count, unsigned int *result, int base); 40 int parse_long(const char *buffer, size_t count, long *result, int base); 41 int parse_ulong(const char *buffer, size_t count, unsigned long *result, int base); 42 43 int read_file(const char *path, char *buf, size_t count, size_t *len); 44 int write_file(const char *path, const char *buf, size_t count); 45 int read_file_alloc(const char *path, char **buf, size_t *len); 46 int read_long(const char *path, long *result, int base); 47 int write_long(const char *path, long result, int base); 48 int read_ulong(const char *path, unsigned long *result, int base); 49 int write_ulong(const char *path, unsigned long result, int base); 50 int read_debugfs_file(const char *debugfs_file, char *buf, size_t count); 51 int write_debugfs_file(const char *debugfs_file, const char *buf, size_t count); 52 int read_debugfs_int(const char *debugfs_file, int *result); 53 int write_debugfs_int(const char *debugfs_file, int result); 54 int read_sysfs_file(char *debugfs_file, char *result, size_t result_size); 55 int perf_event_open_counter(unsigned int type, 56 unsigned long config, int group_fd); 57 int perf_event_enable(int fd); 58 int perf_event_disable(int fd); 59 int perf_event_reset(int fd); 60 61 struct perf_event_read { 62 __u64 nr; 63 __u64 l1d_misses; 64 }; 65 66 #if !defined(__GLIBC_PREREQ) || !__GLIBC_PREREQ(2, 30) 67 #include <unistd.h> 68 #include <sys/syscall.h> 69 70 static inline pid_t gettid(void) 71 { 72 return syscall(SYS_gettid); 73 } 74 #endif 75 76 static inline bool have_hwcap(unsigned long ftr) 77 { 78 return ((unsigned long)get_auxv_entry(AT_HWCAP) & ftr) == ftr; 79 } 80 81 #ifdef AT_HWCAP2 82 static inline bool have_hwcap2(unsigned long ftr2) 83 { 84 return ((unsigned long)get_auxv_entry(AT_HWCAP2) & ftr2) == ftr2; 85 } 86 #else 87 static inline bool have_hwcap2(unsigned long ftr2) 88 { 89 return false; 90 } 91 #endif 92 93 static inline char *auxv_base_platform(void) 94 { 95 return ((char *)get_auxv_entry(AT_BASE_PLATFORM)); 96 } 97 98 static inline char *auxv_platform(void) 99 { 100 return ((char *)get_auxv_entry(AT_PLATFORM)); 101 } 102 103 bool is_ppc64le(void); 104 int using_hash_mmu(bool *using_hash); 105 106 /* Yes, this is evil */ 107 #define FAIL_IF(x) \ 108 do { \ 109 if ((x)) { \ 110 fprintf(stderr, \ 111 "[FAIL] Test FAILED on line %d\n", __LINE__); \ 112 return 1; \ 113 } \ 114 } while (0) 115 116 #define FAIL_IF_EXIT(x) \ 117 do { \ 118 if ((x)) { \ 119 fprintf(stderr, \ 120 "[FAIL] Test FAILED on line %d\n", __LINE__); \ 121 _exit(1); \ 122 } \ 123 } while (0) 124 125 /* The test harness uses this, yes it's gross */ 126 #define MAGIC_SKIP_RETURN_VALUE 99 127 128 #define SKIP_IF(x) \ 129 do { \ 130 if ((x)) { \ 131 fprintf(stderr, \ 132 "[SKIP] Test skipped on line %d\n", __LINE__); \ 133 return MAGIC_SKIP_RETURN_VALUE; \ 134 } \ 135 } while (0) 136 137 #define SKIP_IF_MSG(x, msg) \ 138 do { \ 139 if ((x)) { \ 140 fprintf(stderr, \ 141 "[SKIP] Test skipped on line %d: %s\n", \ 142 __LINE__, msg); \ 143 return MAGIC_SKIP_RETURN_VALUE; \ 144 } \ 145 } while (0) 146 147 #define _str(s) #s 148 #define str(s) _str(s) 149 150 #define sigsafe_err(msg) ({ \ 151 ssize_t nbytes __attribute__((unused)); \ 152 nbytes = write(STDERR_FILENO, msg, strlen(msg)); }) 153 154 /* POWER9 feature */ 155 #ifndef PPC_FEATURE2_ARCH_3_00 156 #define PPC_FEATURE2_ARCH_3_00 0x00800000 157 #endif 158 159 /* POWER10 feature */ 160 #ifndef PPC_FEATURE2_ARCH_3_1 161 #define PPC_FEATURE2_ARCH_3_1 0x00040000 162 #endif 163 164 /* POWER10 features */ 165 #ifndef PPC_FEATURE2_MMA 166 #define PPC_FEATURE2_MMA 0x00020000 167 #endif 168 169 #if defined(__powerpc64__) 170 #define UCONTEXT_NIA(UC) (UC)->uc_mcontext.gp_regs[PT_NIP] 171 #define UCONTEXT_MSR(UC) (UC)->uc_mcontext.gp_regs[PT_MSR] 172 #elif defined(__powerpc__) 173 #define UCONTEXT_NIA(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_NIP] 174 #define UCONTEXT_MSR(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_MSR] 175 #else 176 #error implement UCONTEXT_NIA 177 #endif 178 179 #endif /* _SELFTESTS_POWERPC_UTILS_H */ 180