tools/testing/selftests/powerpc/include/utils.h

   1 /*
   2  * Copyright 2013, Michael Ellerman, IBM Corp.
   3  * Licensed under GPLv2.
   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 "reg.h"
  16
  17 /* Avoid headaches with PRI?64 - just use %ll? always */
  18 typedef unsigned long long u64;
  19 typedef   signed long long s64;
  20
  21 /* Just for familiarity */
  22 typedef uint32_t u32;
  23 typedef uint16_t u16;
  24 typedef uint8_t u8;
  25
  26 void test_harness_set_timeout(uint64_t time);
  27 int test_harness(int (test_function)(void), char *name);
  28
  29 int read_auxv(char *buf, ssize_t buf_size);
  30 void *find_auxv_entry(int type, char *auxv);
  31 void *get_auxv_entry(int type);
  32
  33 int pick_online_cpu(void);
  34
  35 int read_debugfs_file(char *debugfs_file, int *result);
  36 int write_debugfs_file(char *debugfs_file, int result);
  37 void set_dscr(unsigned long val);
  38 int perf_event_open_counter(unsigned int type,
  39                             unsigned long config, int group_fd);
  40 int perf_event_enable(int fd);
  41 int perf_event_disable(int fd);
  42 int perf_event_reset(int fd);
  43
  44 static inline bool have_hwcap(unsigned long ftr)
  45 {
  46         return ((unsigned long)get_auxv_entry(AT_HWCAP) & ftr) == ftr;
  47 }
  48
  49 #ifdef AT_HWCAP2
  50 static inline bool have_hwcap2(unsigned long ftr2)
  51 {
  52         return ((unsigned long)get_auxv_entry(AT_HWCAP2) & ftr2) == ftr2;
  53 }
  54 #else
  55 static inline bool have_hwcap2(unsigned long ftr2)
  56 {
  57         return false;
  58 }
  59 #endif
  60
  61 bool is_ppc64le(void);
  62
  63 /* Yes, this is evil */
  64 #define FAIL_IF(x)                                              \
  65 do {                                                            \
  66         if ((x)) {                                              \
  67                 fprintf(stderr,                                 \
  68                 "[FAIL] Test FAILED on line %d\n", __LINE__);   \
  69                 return 1;                                       \
  70         }                                                       \
  71 } while (0)
  72
  73 /* The test harness uses this, yes it's gross */
  74 #define MAGIC_SKIP_RETURN_VALUE 99
  75
  76 #define SKIP_IF(x)                                              \
  77 do {                                                            \
  78         if ((x)) {                                              \
  79                 fprintf(stderr,                                 \
  80                 "[SKIP] Test skipped on line %d\n", __LINE__);  \
  81                 return MAGIC_SKIP_RETURN_VALUE;                 \
  82         }                                                       \
  83 } while (0)
  84
  85 #define SKIP_IF_MSG(x, msg)                                     \
  86 do {                                                            \
  87         if ((x)) {                                              \
  88                 fprintf(stderr,                                 \
  89                 "[SKIP] Test skipped on line %d: %s\n",         \
  90                  __LINE__, msg);                                \
  91                 return MAGIC_SKIP_RETURN_VALUE;                 \
  92         }                                                       \
  93 } while (0)
  94
  95 #define _str(s) #s
  96 #define str(s) _str(s)
  97
  98 /* POWER9 feature */
  99 #ifndef PPC_FEATURE2_ARCH_3_00
 100 #define PPC_FEATURE2_ARCH_3_00 0x00800000
 101 #endif
 102
 103 #if defined(__powerpc64__)
 104 #define UCONTEXT_NIA(UC)        (UC)->uc_mcontext.gp_regs[PT_NIP]
 105 #define UCONTEXT_MSR(UC)        (UC)->uc_mcontext.gp_regs[PT_MSR]
 106 #elif defined(__powerpc__)
 107 #define UCONTEXT_NIA(UC)        (UC)->uc_mcontext.uc_regs->gregs[PT_NIP]
 108 #define UCONTEXT_MSR(UC)        (UC)->uc_mcontext.uc_regs->gregs[PT_MSR]
 109 #else
 110 #error implement UCONTEXT_NIA
 111 #endif
 112
 113 #endif /* _SELFTESTS_POWERPC_UTILS_H */