| David Benjamin | 054e151 | 2016-03-01 17:35:47 -0500 | [diff] [blame] | 1 | /* Copyright (c) 2016, Google Inc. |
| 2 | * |
| 3 | * Permission to use, copy, modify, and/or distribute this software for any |
| 4 | * purpose with or without fee is hereby granted, provided that the above |
| 5 | * copyright notice and this permission notice appear in all copies. |
| 6 | * |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| 10 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| 12 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| 13 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| 14 | |
| 15 | #include <openssl/cpu.h> |
| 16 | |
| 17 | #if defined(OPENSSL_AARCH64) && !defined(OPENSSL_STATIC_ARMCAP) |
| 18 | |
| 19 | #include <sys/auxv.h> |
| 20 | |
| 21 | #include <openssl/arm_arch.h> |
| 22 | |
| 23 | #include "internal.h" |
| 24 | |
| 25 | |
| 26 | extern uint32_t OPENSSL_armcap_P; |
| 27 | |
| 28 | void OPENSSL_cpuid_setup(void) { |
| 29 | unsigned long hwcap = getauxval(AT_HWCAP); |
| 30 | |
| 31 | /* See /usr/include/asm/hwcap.h on an aarch64 installation for the source of |
| 32 | * these values. */ |
| 33 | static const unsigned long kNEON = 1 << 1; |
| 34 | static const unsigned long kAES = 1 << 3; |
| 35 | static const unsigned long kPMULL = 1 << 4; |
| 36 | static const unsigned long kSHA1 = 1 << 5; |
| 37 | static const unsigned long kSHA256 = 1 << 6; |
| 38 | |
| 39 | if ((hwcap & kNEON) == 0) { |
| 40 | /* Matching OpenSSL, if NEON is missing, don't report other features |
| 41 | * either. */ |
| 42 | return; |
| 43 | } |
| 44 | |
| 45 | OPENSSL_armcap_P |= ARMV7_NEON; |
| 46 | |
| 47 | if (hwcap & kAES) { |
| 48 | OPENSSL_armcap_P |= ARMV8_AES; |
| 49 | } |
| 50 | if (hwcap & kPMULL) { |
| 51 | OPENSSL_armcap_P |= ARMV8_PMULL; |
| 52 | } |
| 53 | if (hwcap & kSHA1) { |
| 54 | OPENSSL_armcap_P |= ARMV8_SHA1; |
| 55 | } |
| 56 | if (hwcap & kSHA256) { |
| 57 | OPENSSL_armcap_P |= ARMV8_SHA256; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | #endif /* OPENSSL_AARCH64 && !OPENSSL_STATIC_ARMCAP */ |
