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host/include/i386: Implement aes-round.h 

Detect AES in cpuinfo; implement the accel hooks.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-06-01 23:58:52 -07:00
parent 28e91474ce
commit d6a2443696
4 changed files with 157 additions and 0 deletions
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1
host/include/i386/host/cpuinfo.h
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@ -26,6 +26,7 @@
#define CPUINFO_AVX512VBMI2 (1u << 15)
#define CPUINFO_ATOMIC_VMOVDQA (1u << 16)
#define CPUINFO_ATOMIC_VMOVDQU (1u << 17)
#define CPUINFO_AES (1u << 18)
/* Initialized with a constructor. */
extern unsigned cpuinfo;

152
host/include/i386/host/crypto/aes-round.h Normal file
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@ -0,0 +1,152 @@
/*
* x86 specific aes acceleration.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef X86_HOST_CRYPTO_AES_ROUND_H
#define X86_HOST_CRYPTO_AES_ROUND_H
#include "host/cpuinfo.h"
#include <immintrin.h>
#if defined(__AES__) && defined(__SSSE3__)
# define HAVE_AES_ACCEL true
# define ATTR_AES_ACCEL
#else
# define HAVE_AES_ACCEL likely(cpuinfo & CPUINFO_AES)
# define ATTR_AES_ACCEL __attribute__((target("aes,ssse3")))
#endif
static inline __m128i ATTR_AES_ACCEL
aes_accel_bswap(__m128i x)
{
return _mm_shuffle_epi8(x, _mm_set_epi8(0, 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15));
}
static inline void ATTR_AES_ACCEL
aesenc_MC_accel(AESState *ret, const AESState *st, bool be)
{
__m128i t = (__m128i)st->v;
__m128i z = _mm_setzero_si128();
if (be) {
t = aes_accel_bswap(t);
t = _mm_aesdeclast_si128(t, z);
t = _mm_aesenc_si128(t, z);
t = aes_accel_bswap(t);
} else {
t = _mm_aesdeclast_si128(t, z);
t = _mm_aesenc_si128(t, z);
}
ret->v = (AESStateVec)t;
}
static inline void ATTR_AES_ACCEL
aesenc_SB_SR_AK_accel(AESState *ret, const AESState *st,
const AESState *rk, bool be)
{
__m128i t = (__m128i)st->v;
__m128i k = (__m128i)rk->v;
if (be) {
t = aes_accel_bswap(t);
k = aes_accel_bswap(k);
t = _mm_aesenclast_si128(t, k);
t = aes_accel_bswap(t);
} else {
t = _mm_aesenclast_si128(t, k);
}
ret->v = (AESStateVec)t;
}
static inline void ATTR_AES_ACCEL
aesenc_SB_SR_MC_AK_accel(AESState *ret, const AESState *st,
const AESState *rk, bool be)
{
__m128i t = (__m128i)st->v;
__m128i k = (__m128i)rk->v;
if (be) {
t = aes_accel_bswap(t);
k = aes_accel_bswap(k);
t = _mm_aesenc_si128(t, k);
t = aes_accel_bswap(t);
} else {
t = _mm_aesenc_si128(t, k);
}
ret->v = (AESStateVec)t;
}
static inline void ATTR_AES_ACCEL
aesdec_IMC_accel(AESState *ret, const AESState *st, bool be)
{
__m128i t = (__m128i)st->v;
if (be) {
t = aes_accel_bswap(t);
t = _mm_aesimc_si128(t);
t = aes_accel_bswap(t);
} else {
t = _mm_aesimc_si128(t);
}
ret->v = (AESStateVec)t;
}
static inline void ATTR_AES_ACCEL
aesdec_ISB_ISR_AK_accel(AESState *ret, const AESState *st,
const AESState *rk, bool be)
{
__m128i t = (__m128i)st->v;
__m128i k = (__m128i)rk->v;
if (be) {
t = aes_accel_bswap(t);
k = aes_accel_bswap(k);
t = _mm_aesdeclast_si128(t, k);
t = aes_accel_bswap(t);
} else {
t = _mm_aesdeclast_si128(t, k);
}
ret->v = (AESStateVec)t;
}
static inline void ATTR_AES_ACCEL
aesdec_ISB_ISR_AK_IMC_accel(AESState *ret, const AESState *st,
const AESState *rk, bool be)
{
__m128i t = (__m128i)st->v;
__m128i k = (__m128i)rk->v;
if (be) {
t = aes_accel_bswap(t);
k = aes_accel_bswap(k);
t = _mm_aesdeclast_si128(t, k);
t = _mm_aesimc_si128(t);
t = aes_accel_bswap(t);
} else {
t = _mm_aesdeclast_si128(t, k);
t = _mm_aesimc_si128(t);
}
ret->v = (AESStateVec)t;
}
static inline void ATTR_AES_ACCEL
aesdec_ISB_ISR_IMC_AK_accel(AESState *ret, const AESState *st,
const AESState *rk, bool be)
{
__m128i t = (__m128i)st->v;
__m128i k = (__m128i)rk->v;
if (be) {
t = aes_accel_bswap(t);
k = aes_accel_bswap(k);
t = _mm_aesdec_si128(t, k);
t = aes_accel_bswap(t);
} else {
t = _mm_aesdec_si128(t, k);
}
ret->v = (AESStateVec)t;
}
#endif /* X86_HOST_CRYPTO_AES_ROUND_H */

1
host/include/x86_64/host/crypto/aes-round.h Normal file
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@ -0,0 +1 @@
#include "host/include/i386/host/crypto/aes-round.h"

3
util/cpuinfo-i386.c
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@ -40,6 +40,9 @@ unsigned __attribute__((constructor)) cpuinfo_init(void)
info |= (c & bit_MOVBE ? CPUINFO_MOVBE : 0);
info |= (c & bit_POPCNT ? CPUINFO_POPCNT : 0);
/* Our AES support requires PSHUFB as well. */
info |= ((c & bit_AES) && (c & bit_SSSE3) ? CPUINFO_AES : 0);
/* For AVX features, we must check available and usable. */
if ((c & bit_AVX) && (c & bit_OSXSAVE)) {
unsigned bv = xgetbv_low(0);