1 // Copyright (c) 2022, Robert Nagy <robert.nagy@gmail.com>
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <openssl/cpu.h>
16
17 #if defined(OPENSSL_AARCH64) && defined(OPENSSL_OPENBSD) && \
18 !defined(OPENSSL_STATIC_ARMCAP) && !defined(OPENSSL_NO_ASM)
19
20 #include <machine/armreg.h>
21 #include <machine/cpu.h>
22 #include <sys/sysctl.h>
23
24 #include "internal.h"
25
26
OPENSSL_cpuid_setup(void)27 void OPENSSL_cpuid_setup(void) {
28 int isar0_mib[] = {CTL_MACHDEP, CPU_ID_AA64ISAR0};
29 uint64_t cpu_id = 0;
30 size_t len = sizeof(cpu_id);
31
32 if (sysctl(isar0_mib, 2, &cpu_id, &len, NULL, 0) < 0) {
33 return;
34 }
35
36 OPENSSL_armcap_P |= ARMV7_NEON;
37
38 if (ID_AA64ISAR0_AES(cpu_id) >= ID_AA64ISAR0_AES_BASE) {
39 OPENSSL_armcap_P |= ARMV8_AES;
40 }
41
42 if (ID_AA64ISAR0_AES(cpu_id) >= ID_AA64ISAR0_AES_PMULL) {
43 OPENSSL_armcap_P |= ARMV8_PMULL;
44 }
45
46 if (ID_AA64ISAR0_SHA1(cpu_id) >= ID_AA64ISAR0_SHA1_BASE) {
47 OPENSSL_armcap_P |= ARMV8_SHA1;
48 }
49
50 if (ID_AA64ISAR0_SHA2(cpu_id) >= ID_AA64ISAR0_SHA2_BASE) {
51 OPENSSL_armcap_P |= ARMV8_SHA256;
52 }
53
54 if (ID_AA64ISAR0_SHA2(cpu_id) >= ID_AA64ISAR0_SHA2_512) {
55 OPENSSL_armcap_P |= ARMV8_SHA512;
56 }
57 }
58
59 #endif // OPENSSL_AARCH64 && OPENSSL_OPENBSD && !OPENSSL_STATIC_ARMCAP
60