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 54 static inline pid_t gettid(void) 55 { 56 return syscall(SYS_gettid); 57 } 58 #endif 59 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 66 static inline bool have_hwcap2(unsigned long ftr2) 67 { 68 return ((unsigned long)get_auxv_entry(AT_HWCAP2) & ftr2) == ftr2; 69 } 70 #else 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