1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2020 Netflix, Inc 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer, 11 * without modification. 12 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 13 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 14 * redistribution must be conditioned upon including a substantially 15 * similar Disclaimer requirement for further binary redistribution. 16 * 17 * NO WARRANTY 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 21 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 23 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 26 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGES. 29 * 30 * $FreeBSD$ 31 */ 32 33 #include <sys/types.h> 34 #include <sys/systm.h> 35 36 #include <machine/cpufunc.h> 37 #include <machine/md_var.h> 38 #include <x86/cputypes.h> 39 #include <x86/specialreg.h> 40 41 #include <crypto/openssl/ossl.h> 42 #include <crypto/openssl/ossl_cipher.h> 43 44 /* 45 * See OPENSSL_ia32cap(3). 46 * 47 * [0] = cpu_feature but with a few custom bits 48 * [1] = cpu_feature2 but with AMD XOP in bit 11 49 * [2] = cpu_stdext_feature 50 * [3] = 0 51 */ 52 unsigned int OPENSSL_ia32cap_P[4]; 53 #define AESNI_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(57-32))) 54 55 ossl_cipher_setkey_t aesni_set_encrypt_key; 56 ossl_cipher_setkey_t aesni_set_decrypt_key; 57 58 void 59 ossl_cpuid(struct ossl_softc *sc) 60 { 61 uint64_t xcr0; 62 u_int regs[4]; 63 u_int max_cores; 64 65 /* Derived from OpenSSL_ia32_cpuid. */ 66 67 OPENSSL_ia32cap_P[0] = cpu_feature & ~(CPUID_B20 | CPUID_IA64); 68 if (cpu_vendor_id == CPU_VENDOR_INTEL) { 69 OPENSSL_ia32cap_P[0] |= CPUID_IA64; 70 if ((cpu_id & 0xf00) != 0xf00) 71 OPENSSL_ia32cap_P[0] |= CPUID_B20; 72 } 73 74 /* Only leave CPUID_HTT on if HTT is present. */ 75 if (cpu_vendor_id == CPU_VENDOR_AMD && cpu_exthigh >= 0x80000008) { 76 max_cores = (cpu_procinfo2 & AMDID_CMP_CORES) + 1; 77 if (cpu_feature & CPUID_HTT) { 78 if ((cpu_procinfo & CPUID_HTT_CORES) >> 16 <= max_cores) 79 OPENSSL_ia32cap_P[0] &= ~CPUID_HTT; 80 } 81 } else { 82 if (cpu_high >= 4) { 83 cpuid_count(4, 0, regs); 84 max_cores = (regs[0] >> 26) & 0xfff; 85 } else 86 max_cores = -1; 87 } 88 if (max_cores == 0) 89 OPENSSL_ia32cap_P[0] &= ~CPUID_HTT; 90 else if ((cpu_procinfo & CPUID_HTT_CORES) >> 16 == 0) 91 OPENSSL_ia32cap_P[0] &= ~CPUID_HTT; 92 93 OPENSSL_ia32cap_P[1] = cpu_feature2 & ~AMDID2_XOP; 94 if (cpu_vendor_id == CPU_VENDOR_AMD) 95 OPENSSL_ia32cap_P[1] |= amd_feature2 & AMDID2_XOP; 96 97 OPENSSL_ia32cap_P[2] = cpu_stdext_feature; 98 if ((OPENSSL_ia32cap_P[1] & CPUID2_XSAVE) == 0) 99 OPENSSL_ia32cap_P[2] &= ~(CPUID_STDEXT_AVX512F | 100 CPUID_STDEXT_AVX512DQ); 101 102 /* Disable AVX512F on Skylake-X. */ 103 if ((cpu_id & 0x0fff0ff0) == 0x00050650) 104 OPENSSL_ia32cap_P[2] &= ~(CPUID_STDEXT_AVX512F); 105 106 if (cpu_feature2 & CPUID2_OSXSAVE) 107 xcr0 = rxcr(0); 108 else 109 xcr0 = 0; 110 111 if ((xcr0 & (XFEATURE_AVX512 | XFEATURE_AVX)) != 112 (XFEATURE_AVX512 | XFEATURE_AVX)) 113 OPENSSL_ia32cap_P[2] &= ~(CPUID_STDEXT_AVX512VL | 114 CPUID_STDEXT_AVX512BW | CPUID_STDEXT_AVX512IFMA | 115 CPUID_STDEXT_AVX512F); 116 if ((xcr0 & XFEATURE_AVX) != XFEATURE_AVX) { 117 OPENSSL_ia32cap_P[1] &= ~(CPUID2_AVX | AMDID2_XOP | CPUID2_FMA); 118 OPENSSL_ia32cap_P[2] &= ~CPUID_STDEXT_AVX2; 119 } 120 121 if (!AESNI_CAPABLE) { 122 sc->has_aes = false; 123 return; 124 } 125 sc->has_aes = true; 126 ossl_cipher_aes_cbc.set_encrypt_key = aesni_set_encrypt_key; 127 ossl_cipher_aes_cbc.set_decrypt_key = aesni_set_decrypt_key; 128 } 129