| // Copyright 2016 The BoringSSL Authors |
| // |
| // 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 |
| // |
| // https://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 "internal.h" |
| |
| #if defined(OPENSSL_AARCH64) && defined(OPENSSL_LINUX) && \ |
| !defined(OPENSSL_STATIC_ARMCAP) && !defined(OPENSSL_NO_ASM) |
| |
| #include <sys/auxv.h> |
| |
| #include <openssl/arm_arch.h> |
| |
| |
| void OPENSSL_cpuid_setup(void) { |
| unsigned long hwcap = getauxval(AT_HWCAP); |
| |
| // See /usr/include/asm/hwcap.h on an aarch64 installation for the source of |
| // these values. |
| static const unsigned long kNEON = 1 << 1; |
| static const unsigned long kAES = 1 << 3; |
| static const unsigned long kPMULL = 1 << 4; |
| static const unsigned long kSHA1 = 1 << 5; |
| static const unsigned long kSHA256 = 1 << 6; |
| static const unsigned long kSHA512 = 1 << 21; |
| |
| if ((hwcap & kNEON) == 0) { |
| // Matching OpenSSL, if NEON is missing, don't report other features |
| // either. |
| return; |
| } |
| |
| OPENSSL_armcap_P |= ARMV7_NEON; |
| |
| if (hwcap & kAES) { |
| OPENSSL_armcap_P |= ARMV8_AES; |
| } |
| if (hwcap & kPMULL) { |
| OPENSSL_armcap_P |= ARMV8_PMULL; |
| } |
| if (hwcap & kSHA1) { |
| OPENSSL_armcap_P |= ARMV8_SHA1; |
| } |
| if (hwcap & kSHA256) { |
| OPENSSL_armcap_P |= ARMV8_SHA256; |
| } |
| if (hwcap & kSHA512) { |
| OPENSSL_armcap_P |= ARMV8_SHA512; |
| } |
| } |
| |
| #endif // OPENSSL_AARCH64 && OPENSSL_LINUX && !OPENSSL_STATIC_ARMCAP |