tests/sys_hwprobe_test.cpp

/*
 * Copyright (C) 2023 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 */

#include <gtest/gtest.h>

#if __has_include(<sys/hwprobe.h>)
#include <sys/hwprobe.h>
#include <sys/syscall.h>
#endif

TEST(sys_hwprobe, __riscv_hwprobe) {
#if defined(__riscv) && __has_include(<sys/hwprobe.h>)
  riscv_hwprobe probes[] = {{.key = RISCV_HWPROBE_KEY_IMA_EXT_0},
                            {.key = RISCV_HWPROBE_KEY_CPUPERF_0}};
  ASSERT_EQ(0, __riscv_hwprobe(probes, 2, 0, nullptr, 0));
  EXPECT_EQ(RISCV_HWPROBE_KEY_IMA_EXT_0, probes[0].key);
  EXPECT_TRUE((probes[0].value & RISCV_HWPROBE_IMA_FD) != 0);
  EXPECT_TRUE((probes[0].value & RISCV_HWPROBE_IMA_C) != 0);
  EXPECT_TRUE((probes[0].value & RISCV_HWPROBE_IMA_V) != 0);
  EXPECT_TRUE((probes[0].value & RISCV_HWPROBE_EXT_ZBA) != 0);
  EXPECT_TRUE((probes[0].value & RISCV_HWPROBE_EXT_ZBB) != 0);
  EXPECT_TRUE((probes[0].value & RISCV_HWPROBE_EXT_ZBS) != 0);

  EXPECT_EQ(RISCV_HWPROBE_KEY_CPUPERF_0, probes[1].key);
  EXPECT_TRUE((probes[1].value & RISCV_HWPROBE_MISALIGNED_MASK) == RISCV_HWPROBE_MISALIGNED_FAST);
#else
  GTEST_SKIP() << "__riscv_hwprobe requires riscv64";
#endif
}

TEST(sys_hwprobe, __riscv_hwprobe_syscall_vdso) {
#if defined(__riscv) && __has_include(<sys/hwprobe.h>)
  riscv_hwprobe probes_vdso[] = {{.key = RISCV_HWPROBE_KEY_IMA_EXT_0},
                                 {.key = RISCV_HWPROBE_KEY_CPUPERF_0}};
  ASSERT_EQ(0, __riscv_hwprobe(probes_vdso, 2, 0, nullptr, 0));

  riscv_hwprobe probes_syscall[] = {{.key = RISCV_HWPROBE_KEY_IMA_EXT_0},
                                    {.key = RISCV_HWPROBE_KEY_CPUPERF_0}};
  ASSERT_EQ(0, syscall(SYS_riscv_hwprobe, probes_syscall, 2, 0, nullptr, 0));

  // Check we got the same answers from the vdso and the syscall.
  EXPECT_EQ(RISCV_HWPROBE_KEY_IMA_EXT_0, probes_syscall[0].key);
  EXPECT_EQ(probes_vdso[0].key, probes_syscall[0].key);
  EXPECT_EQ(probes_vdso[0].value, probes_syscall[0].value);
  EXPECT_EQ(RISCV_HWPROBE_KEY_CPUPERF_0, probes_syscall[1].key);
  EXPECT_EQ(probes_vdso[1].key, probes_syscall[1].key);
  EXPECT_EQ(probes_vdso[1].value, probes_syscall[1].value);
#else
  GTEST_SKIP() << "__riscv_hwprobe requires riscv64";
#endif
}

TEST(sys_hwprobe, __riscv_hwprobe_fail) {
#if defined(__riscv) && __has_include(<sys/hwprobe.h>)
  riscv_hwprobe probes[] = {};
  ASSERT_EQ(EINVAL, __riscv_hwprobe(probes, 0, 0, nullptr, ~0));
#else
  GTEST_SKIP() << "__riscv_hwprobe requires riscv64";
#endif
}