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// Copyright 2017 Google Inc.
//
// 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 "cpuinfo_aarch64.h"
#include "internal/filesystem.h"
#include "internal/hwcaps.h"
#include "internal/stack_line_reader.h"
#include "internal/string_view.h"
#include "internal/unix_features_aggregator.h"
#include <assert.h>
#include <ctype.h>
DECLARE_SETTER(Aarch64Features, fp)
DECLARE_SETTER(Aarch64Features, asimd)
DECLARE_SETTER(Aarch64Features, aes)
DECLARE_SETTER(Aarch64Features, pmull)
DECLARE_SETTER(Aarch64Features, sha1)
DECLARE_SETTER(Aarch64Features, sha2)
DECLARE_SETTER(Aarch64Features, crc32)
static const CapabilityConfig kConfigs[] = {
[AARCH64_FP] = {{AARCH64_HWCAP_FP, 0}, "fp", &set_fp}, //
[AARCH64_ASIMD] = {{AARCH64_HWCAP_ASIMD, 0}, "asimd", &set_asimd}, //
[AARCH64_AES] = {{AARCH64_HWCAP_AES, 0}, "aes", &set_aes}, //
[AARCH64_PMULL] = {{AARCH64_HWCAP_PMULL, 0}, "pmull", &set_pmull}, //
[AARCH64_SHA1] = {{AARCH64_HWCAP_SHA1, 0}, "sha1", &set_sha1}, //
[AARCH64_SHA2] = {{AARCH64_HWCAP_SHA2, 0}, "sha2", &set_sha2}, //
[AARCH64_CRC32] {{AARCH64_HWCAP_CRC32, 0}, "crc32", &set_crc32}, //
};
static const size_t kConfigsSize = sizeof(kConfigs) / sizeof(CapabilityConfig);
static bool HandleAarch64Line(const LineResult result,
Aarch64Info* const info) {
StringView line = result.line;
StringView key, value;
if (CpuFeatures_StringView_GetAttributeKeyValue(line, &key, &value)) {
if (CpuFeatures_StringView_IsEquals(key, str("Features"))) {
CpuFeatures_SetFromFlags(kConfigsSize, kConfigs, value, &info->features);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU implementer"))) {
info->implementer = CpuFeatures_StringView_ParsePositiveNumber(value);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU variant"))) {
info->variant = CpuFeatures_StringView_ParsePositiveNumber(value);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU part"))) {
info->part = CpuFeatures_StringView_ParsePositiveNumber(value);
} else if (CpuFeatures_StringView_IsEquals(key, str("CPU revision"))) {
info->revision = CpuFeatures_StringView_ParsePositiveNumber(value);
}
}
return !result.eof;
}
static void FillProcCpuInfoData(Aarch64Info* const info) {
const int fd = CpuFeatures_OpenFile("/proc/cpuinfo");
if (fd >= 0) {
StackLineReader reader;
StackLineReader_Initialize(&reader, fd);
for (;;) {
if (!HandleAarch64Line(StackLineReader_NextLine(&reader), info)) {
break;
}
}
CpuFeatures_CloseFile(fd);
}
}
static const Aarch64Info kEmptyAarch64Info;
Aarch64Info GetAarch64Info(void) {
assert(kConfigsSize == AARCH64_LAST_);
// capabilities are fetched from both getauxval and /proc/cpuinfo so we can
// have some information if the executable is sandboxed (aka no access to
// /proc/cpuinfo).
Aarch64Info info = kEmptyAarch64Info;
FillProcCpuInfoData(&info);
CpuFeatures_OverrideFromHwCaps(kConfigsSize, kConfigs,
CpuFeatures_GetHardwareCapabilities(),
&info.features);
return info;
}
////////////////////////////////////////////////////////////////////////////////
// Introspection functions
int GetAarch64FeaturesEnumValue(const Aarch64Features* features,
Aarch64FeaturesEnum value) {
switch (value) {
case AARCH64_FP:
return features->fp;
case AARCH64_ASIMD:
return features->asimd;
case AARCH64_AES:
return features->aes;
case AARCH64_PMULL:
return features->pmull;
case AARCH64_SHA1:
return features->sha1;
case AARCH64_SHA2:
return features->sha2;
case AARCH64_CRC32:
return features->crc32;
case AARCH64_LAST_:
break;
}
return false;
}
const char* GetAarch64FeaturesEnumName(Aarch64FeaturesEnum value) {
if(value >= kConfigsSize)
return "unknown feature";
return kConfigs[value].proc_cpuinfo_flag;
}
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