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Code Issues Releases Wiki Activity

Add FreeBSD Arm64 support (#295)

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* Add FreeBSD Arm64 detection

Getting all the features is handled by reading /var/run/dmesg.boot. Feature detections were taken from the freebsd kernel code sys/arm64/arm64/identcpu.c

* Add FreeBSD Arm64 tests

* Add flagm, flagm2 and rng detection

* Add HWCAP FreeBSD AArch64

* Update include to use linux hwcaps for powerpc

* Add FreeBSD aarch64 impl

* Separate Hwacps to freebsd and linux implementation

* Add aarch64 midr_el1 implementation

* Add detection hwcap cpuid to hwcaps.h

* Add MIDR_EL1 tests
This commit is contained in:
Mykola Hohsadze
2023-09-19 12:02:25 +03:00
committed by GitHub
parent 494d9657ef
commit 89a3f0358a
11 changed files with 424 additions and 155 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
BUILD.bazel
View File

@@ -2,7 +2,7 @@
load("@bazel_skylib//lib:selects.bzl", "selects")
load("//:bazel/platforms.bzl", "PLATFORM_CPU_ARM", "PLATFORM_CPU_ARM64", "PLATFORM_CPU_MIPS", "PLATFORM_CPU_PPC", "PLATFORM_CPU_RISCV32", "PLATFORM_CPU_RISCV64", "PLATFORM_CPU_X86_64")
load("//:bazel/platforms.bzl", "PLATFORM_OS_MACOS")
load("//:bazel/platforms.bzl", "PLATFORM_OS_MACOS", "PLATFORM_OS_LINUX", "PLATFORM_OS_FREEBSD", "PLATFORM_OS_ANDROID")
package(
default_visibility = ["//visibility:public"],
@@ -169,11 +169,18 @@ cc_library(
cc_library(
name = "hwcaps",
srcs = ["src/hwcaps.c"],
srcs = [
"src/hwcaps.c",
"src/hwcaps_freebsd.c",
"src/hwcaps_linux_or_android.c",
],
copts = C99_FLAGS,
defines = selects.with_or({
PLATFORM_OS_MACOS: ["HAVE_DLFCN_H"],
"//conditions:default": ["HAVE_STRONG_GETAUXVAL"],
PLATFORM_OS_FREEBSD: ["HAVE_STRONG_ELF_AUX_INFO"],
PLATFORM_OS_LINUX: ["HAVE_STRONG_GETAUXVAL"],
PLATFORM_OS_ANDROID: ["HAVE_STRONG_GETAUXVAL"],
"//conditions:default": [],
}),
includes = INCLUDES,
textual_hdrs = ["include/internal/hwcaps.h"],
@@ -189,6 +196,8 @@ cc_library(
testonly = 1,
srcs = [
"src/hwcaps.c",
"src/hwcaps_freebsd.c",
"src/hwcaps_linux_or_android.c",
"test/hwcaps_for_testing.cc",
],
hdrs = [
@@ -218,9 +227,11 @@ cc_library(
],
PLATFORM_CPU_ARM: ["src/impl_arm_linux_or_android.c"],
PLATFORM_CPU_ARM64: [
"src/impl_aarch64_cpuid.c",
"src/impl_aarch64_linux_or_android.c",
"src/impl_aarch64_macos_or_iphone.c",
"src/impl_aarch64_windows.c",
"src/impl_aarch64_freebsd.c",
],
PLATFORM_CPU_MIPS: ["src/impl_mips_linux_or_android.c"],
PLATFORM_CPU_PPC: ["src/impl_ppc_linux.c"],
@@ -234,7 +245,10 @@ cc_library(
"include/internal/windows_utils.h",
],
PLATFORM_CPU_ARM: ["include/cpuinfo_arm.h"],
PLATFORM_CPU_ARM64: ["include/cpuinfo_aarch64.h"],
PLATFORM_CPU_ARM64: [
"include/cpuinfo_aarch64.h",
"include/internal/cpuid_aarch64.h",
],
PLATFORM_CPU_MIPS: ["include/cpuinfo_mips.h"],
PLATFORM_CPU_PPC: ["include/cpuinfo_ppc.h"],
PLATFORM_CPU_RISCV32: ["include/cpuinfo_riscv.h"],
@@ -278,9 +292,11 @@ cc_library(
],
PLATFORM_CPU_ARM: ["src/impl_arm_linux_or_android.c"],
PLATFORM_CPU_ARM64: [
"src/impl_aarch64_cpuid.c",
"src/impl_aarch64_linux_or_android.c",
"src/impl_aarch64_macos_or_iphone.c",
"src/impl_aarch64_windows.c",
"src/impl_aarch64_freebsd.c",
],
PLATFORM_CPU_MIPS: ["src/impl_mips_linux_or_android.c"],
PLATFORM_CPU_PPC: ["src/impl_ppc_linux.c"],
@@ -294,7 +310,10 @@ cc_library(
"include/internal/windows_utils.h",
],
PLATFORM_CPU_ARM: ["include/cpuinfo_arm.h"],
PLATFORM_CPU_ARM64: ["include/cpuinfo_aarch64.h"],
PLATFORM_CPU_ARM64: [
"include/cpuinfo_aarch64.h",
"include/internal/cpuid_aarch64.h"
],
PLATFORM_CPU_MIPS: ["include/cpuinfo_mips.h"],
PLATFORM_CPU_PPC: ["include/cpuinfo_ppc.h"],
PLATFORM_CPU_RISCV32: ["include/cpuinfo_riscv.h"],

7
CMakeLists.txt
View File

@@ -106,6 +106,7 @@ macro(add_cpu_features_headers_and_sources HDRS_LIST_NAME SRCS_LIST_NAME)
list(APPEND ${HDRS_LIST_NAME} ${PROJECT_SOURCE_DIR}/include/cpuinfo_arm.h)
elseif(PROCESSOR_IS_AARCH64)
list(APPEND ${HDRS_LIST_NAME} ${PROJECT_SOURCE_DIR}/include/cpuinfo_aarch64.h)
list(APPEND ${SRCS_LIST_NAME} ${PROJECT_SOURCE_DIR}/include/internal/cpuid_aarch64.h)
list(APPEND ${SRCS_LIST_NAME} ${PROJECT_SOURCE_DIR}/include/internal/windows_utils.h)
elseif(PROCESSOR_IS_X86)
list(APPEND ${HDRS_LIST_NAME} ${PROJECT_SOURCE_DIR}/include/cpuinfo_x86.h)
@@ -146,6 +147,8 @@ setup_include_and_definitions(utils)
if(UNIX)
add_library(unix_based_hardware_detection OBJECT
${PROJECT_SOURCE_DIR}/include/internal/hwcaps.h
${PROJECT_SOURCE_DIR}/src/hwcaps_linux_or_android.c
${PROJECT_SOURCE_DIR}/src/hwcaps_freebsd.c
${PROJECT_SOURCE_DIR}/src/hwcaps.c
)
setup_include_and_definitions(unix_based_hardware_detection)
@@ -154,9 +157,13 @@ if(UNIX)
target_compile_definitions(unix_based_hardware_detection PRIVATE HAVE_DLFCN_H)
endif()
check_symbol_exists(getauxval "sys/auxv.h" HAVE_STRONG_GETAUXVAL)
check_symbol_exists(elf_aux_info "sys/auxv.h" HAVE_STRONG_ELF_AUX_INFO)
if(HAVE_STRONG_GETAUXVAL)
target_compile_definitions(unix_based_hardware_detection PRIVATE HAVE_STRONG_GETAUXVAL)
endif()
if(HAVE_STRONG_ELF_AUX_INFO)
target_compile_definitions(unix_based_hardware_detection PUBLIC HAVE_STRONG_ELF_AUX_INFO)
endif()
endif()
#

6
bazel/platforms.bzl
View File

@@ -16,3 +16,9 @@ PLATFORM_CPU_RISCV64 = ("@platforms//cpu:riscv64")
PLATFORM_OS_MACOS = ("@platforms//os:macos")
PLATFORM_OS_LINUX = ("@platforms//os:linux")
PLATFORM_OS_ANDROID = ("@platforms//os:android")
PLATFORM_OS_FREEBSD = ("@platforms//os:freebsd")

28
include/internal/cpuid_aarch64.h Normal file
View File

@@ -0,0 +1,28 @@
// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef CPU_FEATURES_INCLUDE_CPUID_AARCH64_H_
#define CPU_FEATURES_INCLUDE_CPUID_AARCH64_H_
#include <stdint.h>
#include "cpu_features_macros.h"
CPU_FEATURES_START_CPP_NAMESPACE
uint64_t GetMidrEl1(void);
CPU_FEATURES_END_CPP_NAMESPACE
#endif // CPU_FEATURES_INCLUDE_CPUID_AARCH64_H_

143
src/hwcaps.c
View File

@@ -14,12 +14,7 @@
#include "internal/hwcaps.h"
#include <stdlib.h>
#include <string.h>
#include "cpu_features_macros.h"
#include "internal/filesystem.h"
#include "internal/string_view.h"
#include <stdbool.h>
static bool IsSet(const uint32_t mask, const uint32_t value) {
if (mask == 0) return false;
@@ -31,139 +26,3 @@ bool CpuFeatures_IsHwCapsSet(const HardwareCapabilities hwcaps_mask,
return IsSet(hwcaps_mask.hwcaps, hwcaps.hwcaps) ||
IsSet(hwcaps_mask.hwcaps2, hwcaps.hwcaps2);
}
#ifdef CPU_FEATURES_TEST
// In test mode, hwcaps_for_testing will define the following functions.
HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void);
const char* CpuFeatures_GetPlatformPointer(void);
const char* CpuFeatures_GetBasePlatformPointer(void);
#else
// Debug facilities
#if defined(NDEBUG)
#define D(...)
#else
#include <stdio.h>
#define D(...) \
do { \
printf(__VA_ARGS__); \
fflush(stdout); \
} while (0)
#endif
////////////////////////////////////////////////////////////////////////////////
// Implementation of GetElfHwcapFromGetauxval
////////////////////////////////////////////////////////////////////////////////
#define AT_HWCAP 16
#define AT_HWCAP2 26
#define AT_PLATFORM 15
#define AT_BASE_PLATFORM 24
#if defined(HAVE_STRONG_GETAUXVAL)
#include <sys/auxv.h>
static unsigned long GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
return getauxval(hwcap_type);
}
#elif defined(HAVE_DLFCN_H)
// On Android we probe the system's C library for a 'getauxval' function and
// call it if it exits, or return 0 for failure. This function is available
// since API level 18.
//
// Note that getauxval() can't really be re-implemented here, because its
// implementation does not parse /proc/self/auxv. Instead it depends on values
// that are passed by the kernel at process-init time to the C runtime
// initialization layer.
#include <dlfcn.h>
typedef unsigned long getauxval_func_t(unsigned long);
static uint32_t GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
uint32_t ret = 0;
void *libc_handle = NULL;
getauxval_func_t *func = NULL;
dlerror(); // Cleaning error state before calling dlopen.
libc_handle = dlopen("libc.so", RTLD_NOW);
if (!libc_handle) {
D("Could not dlopen() C library: %s\n", dlerror());
return 0;
}
func = (getauxval_func_t *)dlsym(libc_handle, "getauxval");
if (!func) {
D("Could not find getauxval() in C library\n");
} else {
// Note: getauxval() returns 0 on failure. Doesn't touch errno.
ret = (uint32_t)(*func)(hwcap_type);
}
dlclose(libc_handle);
return ret;
}
#else
#error "This platform does not provide hardware capabilities."
#endif
// Implementation of GetHardwareCapabilities for OS that provide
// GetElfHwcapFromGetauxval().
// Fallback when getauxval is not available, retrieves hwcaps from
// "/proc/self/auxv".
static uint32_t GetElfHwcapFromProcSelfAuxv(uint32_t hwcap_type) {
struct {
uint32_t tag;
uint32_t value;
} entry;
uint32_t result = 0;
const char filepath[] = "/proc/self/auxv";
const int fd = CpuFeatures_OpenFile(filepath);
if (fd < 0) {
D("Could not open %s\n", filepath);
return 0;
}
for (;;) {
const int ret = CpuFeatures_ReadFile(fd, (char *)&entry, sizeof entry);
if (ret < 0) {
D("Error while reading %s\n", filepath);
break;
}
// Detect end of list.
if (ret == 0 || (entry.tag == 0 && entry.value == 0)) {
break;
}
if (entry.tag == hwcap_type) {
result = entry.value;
break;
}
}
CpuFeatures_CloseFile(fd);
return result;
}
// Retrieves hardware capabilities by first trying to call getauxval, if not
// available falls back to reading "/proc/self/auxv".
static unsigned long GetHardwareCapabilitiesFor(uint32_t type) {
unsigned long hwcaps = GetElfHwcapFromGetauxval(type);
if (!hwcaps) {
D("Parsing /proc/self/auxv to extract ELF hwcaps!\n");
hwcaps = GetElfHwcapFromProcSelfAuxv(type);
}
return hwcaps;
}
HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void) {
HardwareCapabilities capabilities;
capabilities.hwcaps = GetHardwareCapabilitiesFor(AT_HWCAP);
capabilities.hwcaps2 = GetHardwareCapabilitiesFor(AT_HWCAP2);
return capabilities;
}
const char *CpuFeatures_GetPlatformPointer(void) {
return (const char *)GetHardwareCapabilitiesFor(AT_PLATFORM);
}
const char *CpuFeatures_GetBasePlatformPointer(void) {
return (const char *)GetHardwareCapabilitiesFor(AT_BASE_PLATFORM);
}
#endif // CPU_FEATURES_TEST

54
src/hwcaps_freebsd.c Normal file
View File

@@ -0,0 +1,54 @@
// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cpu_features_macros.h"
#ifdef CPU_FEATURES_OS_FREEBSD
#include "internal/hwcaps.h"
#ifdef CPU_FEATURES_TEST
// In test mode, hwcaps_for_testing will define the following functions.
HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void);
const char* CpuFeatures_GetPlatformPointer(void);
const char* CpuFeatures_GetBasePlatformPointer(void);
#else
#ifdef HAVE_STRONG_ELF_AUX_INFO
#include <stddef.h>
#include <sys/auxv.h>
static unsigned long GetElfHwcapFromElfAuxInfo(int hwcap_type) {
unsigned long hwcap;
elf_aux_info(hwcap_type, &hwcap, sizeof(hwcap));
return hwcap;
}
HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void) {
HardwareCapabilities capabilities;
capabilities.hwcaps = GetElfHwcapFromElfAuxInfo(AT_HWCAP);
capabilities.hwcaps2 = GetElfHwcapFromElfAuxInfo(AT_HWCAP2);
return capabilities;
}
const char *CpuFeatures_GetPlatformPointer(void) { return NULL; }
const char *CpuFeatures_GetBasePlatformPointer(void) { return NULL; }
#else
#error "FreeBSD needs support for elf_aux_info"
#endif // HAVE_STRONG_ELF_AUX_INFO
#endif // CPU_FEATURES_TEST
#endif // CPU_FEATURES_OS_FREEBSD

161
src/hwcaps_linux_or_android.c Normal file
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@@ -0,0 +1,161 @@
// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cpu_features_macros.h"
#if defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_ANDROID)
#include <stdlib.h>
#include <string.h>
#include "cpu_features_macros.h"
#include "internal/filesystem.h"
#include "internal/hwcaps.h"
#include "internal/string_view.h"
#ifdef CPU_FEATURES_TEST
// In test mode, hwcaps_for_testing will define the following functions.
HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void);
const char* CpuFeatures_GetPlatformPointer(void);
const char* CpuFeatures_GetBasePlatformPointer(void);
#else
// Debug facilities
#if defined(NDEBUG)
#define D(...)
#else
#include <stdio.h>
#define D(...) \
do { \
printf(__VA_ARGS__); \
fflush(stdout); \
} while (0)
#endif
////////////////////////////////////////////////////////////////////////////////
// Implementation of GetElfHwcapFromGetauxval
////////////////////////////////////////////////////////////////////////////////
#if defined(HAVE_STRONG_GETAUXVAL)
#include <sys/auxv.h>
static unsigned long GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
return getauxval(hwcap_type);
}
#elif defined(HAVE_DLFCN_H)
// On Android we probe the system's C library for a 'getauxval' function and
// call it if it exits, or return 0 for failure. This function is available
// since API level 18.
//
// Note that getauxval() can't really be re-implemented here, because its
// implementation does not parse /proc/self/auxv. Instead it depends on values
// that are passed by the kernel at process-init time to the C runtime
// initialization layer.
#include <dlfcn.h>
typedef unsigned long getauxval_func_t(unsigned long);
static uint32_t GetElfHwcapFromGetauxval(uint32_t hwcap_type) {
uint32_t ret = 0;
void *libc_handle = NULL;
getauxval_func_t *func = NULL;
dlerror(); // Cleaning error state before calling dlopen.
libc_handle = dlopen("libc.so", RTLD_NOW);
if (!libc_handle) {
D("Could not dlopen() C library: %s\n", dlerror());
return 0;
}
func = (getauxval_func_t *)dlsym(libc_handle, "getauxval");
if (!func) {
D("Could not find getauxval() in C library\n");
} else {
// Note: getauxval() returns 0 on failure. Doesn't touch errno.
ret = (uint32_t)(*func)(hwcap_type);
}
dlclose(libc_handle);
return ret;
}
#else
#error "This platform does not provide hardware capabilities."
#endif
// Implementation of GetHardwareCapabilities for OS that provide
// GetElfHwcapFromGetauxval().
// Fallback when getauxval is not available, retrieves hwcaps from
// "/proc/self/auxv".
static uint32_t GetElfHwcapFromProcSelfAuxv(uint32_t hwcap_type) {
struct {
uint32_t tag;
uint32_t value;
} entry;
uint32_t result = 0;
const char filepath[] = "/proc/self/auxv";
const int fd = CpuFeatures_OpenFile(filepath);
if (fd < 0) {
D("Could not open %s\n", filepath);
return 0;
}
for (;;) {
const int ret = CpuFeatures_ReadFile(fd, (char *)&entry, sizeof entry);
if (ret < 0) {
D("Error while reading %s\n", filepath);
break;
}
// Detect end of list.
if (ret == 0 || (entry.tag == 0 && entry.value == 0)) {
break;
}
if (entry.tag == hwcap_type) {
result = entry.value;
break;
}
}
CpuFeatures_CloseFile(fd);
return result;
}
// Retrieves hardware capabilities by first trying to call getauxval, if not
// available falls back to reading "/proc/self/auxv".
static unsigned long GetHardwareCapabilitiesFor(uint32_t type) {
unsigned long hwcaps = GetElfHwcapFromGetauxval(type);
if (!hwcaps) {
D("Parsing /proc/self/auxv to extract ELF hwcaps!\n");
hwcaps = GetElfHwcapFromProcSelfAuxv(type);
}
return hwcaps;
}
HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void) {
HardwareCapabilities capabilities;
capabilities.hwcaps = GetHardwareCapabilitiesFor(AT_HWCAP);
capabilities.hwcaps2 = GetHardwareCapabilitiesFor(AT_HWCAP2);
return capabilities;
}
const char *CpuFeatures_GetPlatformPointer(void) {
return (const char *)GetHardwareCapabilitiesFor(AT_PLATFORM);
}
const char *CpuFeatures_GetBasePlatformPointer(void) {
return (const char *)GetHardwareCapabilitiesFor(AT_BASE_PLATFORM);
}
bool CpuFeatures_IsHwCapCpuidSupported() {
return GetElfHwcapFromGetauxval(AARCH64_HWCAP_CPUID);
}
#endif // CPU_FEATURES_TEST
#endif // defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_ANDROID)

40
src/impl_aarch64_cpuid.c Normal file
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@@ -0,0 +1,40 @@
// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cpu_features_macros.h"
#ifdef CPU_FEATURES_ARCH_AARCH64
#if (defined(CPU_FEATURES_OS_FREEBSD) || defined(CPU_FEATURES_OS_LINUX) || \
defined(CPU_FEATURES_OS_ANDROID))
#if (defined(CPU_FEATURES_COMPILER_GCC) || defined(CPU_FEATURES_COMPILER_CLANG))
#include "internal/cpuid_aarch64.h"
#ifdef CPU_FEATURES_MOCK_CPUID_AARCH64
// Implementation will be provided by test/cpuinfo_aarch64_test.cc.
#else
uint64_t GetMidrEl1(void) {
uint64_t midr_el1;
__asm("mrs %0, MIDR_EL1" : "=r"(midr_el1));
return midr_el1;
}
#endif // CPU_FEATURES_MOCK_CPUID_AARCH64
#else
#error "Unsupported compiler, aarch64 cpuid requires either GCC or Clang."
#endif // (defined(CPU_FEATURES_COMPILER_GCC) ||
// defined(CPU_FEATURES_COMPILER_CLANG))
#endif // (defined(CPU_FEATURES_OS_FREEBSD) || defined(CPU_FEATURES_OS_LINUX)
// || defined(CPU_FEATURES_OS_ANDROID))
#endif // CPU_FEATURES_ARCH_AARCH64

46
src/impl_aarch64_freebsd.c Normal file
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@@ -0,0 +1,46 @@
// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cpu_features_macros.h"
#ifdef CPU_FEATURES_ARCH_AARCH64
#ifdef CPU_FEATURES_OS_FREEBSD
#include "cpuinfo_aarch64.h"
#include "impl_aarch64__base_implementation.inl"
#include "internal/cpuid_aarch64.h"
#include "internal/hwcaps.h"
static const Aarch64Info kEmptyAarch64Info;
Aarch64Info GetAarch64Info(void) {
Aarch64Info info = kEmptyAarch64Info;
const HardwareCapabilities hwcaps = CpuFeatures_GetHardwareCapabilities();
for (size_t i = 0; i < AARCH64_LAST_; ++i) {
if (CpuFeatures_IsHwCapsSet(kHardwareCapabilities[i], hwcaps)) {
kSetters[i](&info.features, true);
}
}
if (info.features.cpuid) {
const uint64_t midr_el1 = GetMidrEl1();
info.implementer = (int)ExtractBitRange(midr_el1, 31, 24);
info.variant = (int)ExtractBitRange(midr_el1, 23, 20);
info.part = (int)ExtractBitRange(midr_el1, 15, 4);
info.revision = (int)ExtractBitRange(midr_el1, 3, 0);
}
return info;
}
#endif // CPU_FEATURES_OS_FREEBSD
#endif // CPU_FEATURES_ARCH_AARCH64

8
test/CMakeLists.txt
View File

@@ -22,7 +22,11 @@ add_library(stack_line_reader_for_test ../src/stack_line_reader.c)
target_compile_definitions(stack_line_reader_for_test PUBLIC STACK_LINE_READER_BUFFER_SIZE=16)
target_link_libraries(stack_line_reader_for_test string_view filesystem_for_testing)
##------------------------------------------------------------------------------
add_library(all_libraries ../src/hwcaps.c ../src/stack_line_reader.c)
add_library(all_libraries
../src/hwcaps.c
../src/hwcaps_linux_or_android.c
../src/hwcaps_freebsd.c
../src/stack_line_reader.c)
target_link_libraries(all_libraries hwcaps_for_testing stack_line_reader string_view)
#
@@ -73,9 +77,11 @@ endif()
if(PROCESSOR_IS_AARCH64)
add_executable(cpuinfo_aarch64_test
cpuinfo_aarch64_test.cc
../src/impl_aarch64_cpuid.c
../src/impl_aarch64_linux_or_android.c
../src/impl_aarch64_windows.c
../src/impl_aarch64_macos_or_iphone.c
../src/impl_aarch64_freebsd.c
)
if(APPLE)
target_compile_definitions(cpuinfo_aarch64_test PUBLIC CPU_FEATURES_MOCK_SYSCTL_AARCH64)

57
test/cpuinfo_aarch64_test.cc
View File

@@ -22,11 +22,20 @@
#if defined(CPU_FEATURES_OS_WINDOWS)
#include "internal/windows_utils.h"
#endif // CPU_FEATURES_OS_WINDOWS
#if defined(CPU_FEATURES_OS_FREEBSD) || defined(CPU_FEATURES_OS_LINUX)
#include "internal/cpuid_aarch64.h"
#endif // defined(CPU_FEATURES_OS_FREEBSD) || defined(CPU_FEATURES_OS_LINUX)
namespace cpu_features {
class FakeCpuAarch64 {
#if defined(CPU_FEATURES_OS_LINUX)
// No particular implementation for Linux as we use /proc/cpuinfo
#if defined(CPU_FEATURES_OS_FREEBSD) || defined(CPU_FEATURES_OS_LINUX)
public:
uint64_t GetMidrEl1() const { return _midr_el1; }
void SetMidrEl1(uint64_t midr_el1) { _midr_el1 = midr_el1; }
private:
uint64_t _midr_el1;
#elif defined(CPU_FEATURES_OS_MACOS)
std::set<std::string> darwin_sysctlbyname_;
std::map<std::string, int> darwin_sysctlbynamevalue_;
@@ -80,8 +89,8 @@ static FakeCpuAarch64& cpu() {
}
// Define OS dependent mock functions
#if defined(CPU_FEATURES_OS_LINUX)
// No particular functions to implement for Linux as we use /proc/cpuinfo
#if defined(CPU_FEATURES_OS_FREEBSD) || defined(CPU_FEATURES_OS_LINUX)
extern "C" uint64_t GetMidrEl1(void) { return cpu().GetMidrEl1(); }
#elif defined(CPU_FEATURES_OS_MACOS)
extern "C" bool GetDarwinSysCtlByName(const char* name) {
return cpu().GetDarwinSysCtlByName(name);
@@ -127,8 +136,8 @@ TEST_F(CpuidAarch64Test, Aarch64FeaturesEnum) {
}
}
// OS dependent tests
#if defined(CPU_FEATURES_OS_LINUX)
// AT_HWCAP tests
#if defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_FREEBSD)
TEST_F(CpuidAarch64Test, FromHardwareCap) {
ResetHwcaps();
SetHardwareCapabilities(AARCH64_HWCAP_FP | AARCH64_HWCAP_AES, 0);
@@ -196,7 +205,10 @@ TEST_F(CpuidAarch64Test, FromHardwareCap2) {
EXPECT_FALSE(info.features.dgh);
EXPECT_FALSE(info.features.rng);
}
#endif // defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_FREEBSD)
// OS dependent tests
#if defined(CPU_FEATURES_OS_LINUX)
TEST_F(CpuidAarch64Test, ARMCortexA53) {
ResetHwcaps();
auto& fs = GetEmptyFilesystem();
@@ -383,6 +395,37 @@ TEST_F(CpuidAarch64Test, WINDOWS_AARCH64_RPI4) {
EXPECT_FALSE(info.features.jscvt);
EXPECT_FALSE(info.features.lrcpc);
}
#endif // CPU_FEATURES_OS_WINDOWS
#elif defined(CPU_FEATURES_OS_FREEBSD)
TEST_F(CpuidAarch64Test, MrsMidrEl1_RPI4) {
ResetHwcaps();
SetHardwareCapabilities(AARCH64_HWCAP_FP | AARCH64_HWCAP_CPUID, 0);
cpu().SetMidrEl1(0x410FD083);
const auto info = GetAarch64Info();
EXPECT_EQ(info.implementer, 0x41);
EXPECT_EQ(info.variant, 0);
EXPECT_EQ(info.part, 0xD08);
EXPECT_EQ(info.revision, 0x3);
EXPECT_TRUE(info.features.fp);
EXPECT_FALSE(info.features.dcpodp);
EXPECT_FALSE(info.features.sveaes);
EXPECT_FALSE(info.features.svepmull);
EXPECT_FALSE(info.features.svebitperm);
EXPECT_FALSE(info.features.svesha3);
EXPECT_FALSE(info.features.svesm4);
EXPECT_FALSE(info.features.flagm2);
EXPECT_FALSE(info.features.frint);
EXPECT_FALSE(info.features.svei8mm);
EXPECT_FALSE(info.features.svef32mm);
EXPECT_FALSE(info.features.svef64mm);
EXPECT_FALSE(info.features.svebf16);
EXPECT_FALSE(info.features.i8mm);
EXPECT_FALSE(info.features.bf16);
EXPECT_FALSE(info.features.dgh);
EXPECT_FALSE(info.features.rng);
}
#endif // CPU_FEATURES_OS_FREEBSD
} // namespace
} // namespace cpu_features