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

   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 "reg.h"
  16
  17/* Avoid headaches with PRI?64 - just use %ll? always */
  18typedef unsigned long long u64;
  19typedef   signed long long s64;
  20
  21/* Just for familiarity */
  22typedef uint32_t u32;
  23typedef uint16_t u16;
  24typedef uint8_t u8;
  25
  26void test_harness_set_timeout(uint64_t time);
  27int test_harness(int (test_function)(void), char *name);
  28
  29int read_auxv(char *buf, ssize_t buf_size);
  30void *find_auxv_entry(int type, char *auxv);
  31void *get_auxv_entry(int type);
  32
  33int pick_online_cpu(void);
  34
  35int read_debugfs_file(char *debugfs_file, int *result);
  36int write_debugfs_file(char *debugfs_file, int result);
  37void set_dscr(unsigned long val);
  38int perf_event_open_counter(unsigned int type,
  39                            unsigned long config, int group_fd);
  40int perf_event_enable(int fd);
  41int perf_event_disable(int fd);
  42int perf_event_reset(int fd);
  43
  44static 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
  50static inline bool have_hwcap2(unsigned long ftr2)
  51{
  52        return ((unsigned long)get_auxv_entry(AT_HWCAP2) & ftr2) == ftr2;
  53}
  54#else
  55static inline bool have_hwcap2(unsigned long ftr2)
  56{
  57        return false;
  58}
  59#endif
  60
  61bool is_ppc64le(void);
  62
  63/* Yes, this is evil */
  64#define FAIL_IF(x)                                              \
  65do {                                                            \
  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)                                              \
  77do {                                                            \
  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)                                     \
  86do {                                                            \
  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 */
 114