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Reviewed-by: Daniel Henrique Barboza Signed-off-by: Richard Henderson --- host/include/ppc/host/cpuinfo.h | 1 + host/include/ppc/host/crypto/aes-round.h | 182 +++++++++++++++++++++ host/include/ppc64/host/crypto/aes-round.h | 1 + util/cpuinfo-ppc.c | 8 + 4 files changed, 192 insertions(+) create mode 100644 host/include/ppc/host/crypto/aes-round.h create mode 100644 host/include/ppc64/host/crypto/aes-round.h diff --git a/host/include/ppc/host/cpuinfo.h b/host/include/ppc/host/cpuinfo.h index df11e8d417..29ee7f9ef8 100644 --- a/host/include/ppc/host/cpuinfo.h +++ b/host/include/ppc/host/cpuinfo.h @@ -16,6 +16,7 @@ #define CPUINFO_ISEL (1u << 5) #define CPUINFO_ALTIVEC (1u << 6) #define CPUINFO_VSX (1u << 7) +#define CPUINFO_CRYPTO (1u << 8) /* Initialized with a constructor. */ extern unsigned cpuinfo; diff --git a/host/include/ppc/host/crypto/aes-round.h b/host/include/ppc/host/crypto/aes-round.h new file mode 100644 index 0000000000..8062d2a537 --- /dev/null +++ b/host/include/ppc/host/crypto/aes-round.h @@ -0,0 +1,182 @@ +/* + * Power v2.07 specific aes acceleration. + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef PPC_HOST_CRYPTO_AES_ROUND_H +#define PPC_HOST_CRYPTO_AES_ROUND_H + +#ifdef __ALTIVEC__ +#include "host/cpuinfo.h" + +#ifdef __CRYPTO__ +# define HAVE_AES_ACCEL true +#else +# define HAVE_AES_ACCEL likely(cpuinfo & CPUINFO_CRYPTO) +#endif +#define ATTR_AES_ACCEL + +/* + * While there is , both gcc and clang "aid" with the + * endianness issues in different ways. Just use inline asm instead. + */ + +/* Bytes in memory are host-endian; bytes in register are @be. */ +static inline AESStateVec aes_accel_ld(const AESState *p, bool be) +{ + AESStateVec r; + + if (be) { + asm("lvx %0, 0, %1" : "=v"(r) : "r"(p), "m"(*p)); + } else if (HOST_BIG_ENDIAN) { + AESStateVec rev = { + 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, + }; + asm("lvx %0, 0, %1\n\t" + "vperm %0, %0, %0, %2" + : "=v"(r) : "r"(p), "v"(rev), "m"(*p)); + } else { +#ifdef __POWER9_VECTOR__ + asm("lxvb16x %x0, 0, %1" : "=v"(r) : "r"(p), "m"(*p)); +#else + asm("lxvd2x %x0, 0, %1\n\t" + "xxpermdi %x0, %x0, %x0, 2" + : "=v"(r) : "r"(p), "m"(*p)); +#endif + } + return r; +} + +static void aes_accel_st(AESState *p, AESStateVec r, bool be) +{ + if (be) { + asm("stvx %1, 0, %2" : "=m"(*p) : "v"(r), "r"(p)); + } else if (HOST_BIG_ENDIAN) { + AESStateVec rev = { + 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, + }; + asm("vperm %1, %1, %1, %2\n\t" + "stvx %1, 0, %3" + : "=m"(*p), "+v"(r) : "v"(rev), "r"(p)); + } else { +#ifdef __POWER9_VECTOR__ + asm("stxvb16x %x1, 0, %2" : "=m"(*p) : "v"(r), "r"(p)); +#else + asm("xxpermdi %x1, %x1, %x1, 2\n\t" + "stxvd2x %x1, 0, %2" + : "=m"(*p), "+v"(r) : "r"(p)); +#endif + } +} + +static inline AESStateVec aes_accel_vcipher(AESStateVec d, AESStateVec k) +{ + asm("vcipher %0, %0, %1" : "+v"(d) : "v"(k)); + return d; +} + +static inline AESStateVec aes_accel_vncipher(AESStateVec d, AESStateVec k) +{ + asm("vncipher %0, %0, %1" : "+v"(d) : "v"(k)); + return d; +} + +static inline AESStateVec aes_accel_vcipherlast(AESStateVec d, AESStateVec k) +{ + asm("vcipherlast %0, %0, %1" : "+v"(d) : "v"(k)); + return d; +} + +static inline AESStateVec aes_accel_vncipherlast(AESStateVec d, AESStateVec k) +{ + asm("vncipherlast %0, %0, %1" : "+v"(d) : "v"(k)); + return d; +} + +static inline void +aesenc_MC_accel(AESState *ret, const AESState *st, bool be) +{ + AESStateVec t, z = { }; + + t = aes_accel_ld(st, be); + t = aes_accel_vncipherlast(t, z); + t = aes_accel_vcipher(t, z); + aes_accel_st(ret, t, be); +} + +static inline void +aesenc_SB_SR_AK_accel(AESState *ret, const AESState *st, + const AESState *rk, bool be) +{ + AESStateVec t, k; + + t = aes_accel_ld(st, be); + k = aes_accel_ld(rk, be); + t = aes_accel_vcipherlast(t, k); + aes_accel_st(ret, t, be); +} + +static inline void +aesenc_SB_SR_MC_AK_accel(AESState *ret, const AESState *st, + const AESState *rk, bool be) +{ + AESStateVec t, k; + + t = aes_accel_ld(st, be); + k = aes_accel_ld(rk, be); + t = aes_accel_vcipher(t, k); + aes_accel_st(ret, t, be); +} + +static inline void +aesdec_IMC_accel(AESState *ret, const AESState *st, bool be) +{ + AESStateVec t, z = { }; + + t = aes_accel_ld(st, be); + t = aes_accel_vcipherlast(t, z); + t = aes_accel_vncipher(t, z); + aes_accel_st(ret, t, be); +} + +static inline void +aesdec_ISB_ISR_AK_accel(AESState *ret, const AESState *st, + const AESState *rk, bool be) +{ + AESStateVec t, k; + + t = aes_accel_ld(st, be); + k = aes_accel_ld(rk, be); + t = aes_accel_vncipherlast(t, k); + aes_accel_st(ret, t, be); +} + +static inline void +aesdec_ISB_ISR_AK_IMC_accel(AESState *ret, const AESState *st, + const AESState *rk, bool be) +{ + AESStateVec t, k; + + t = aes_accel_ld(st, be); + k = aes_accel_ld(rk, be); + t = aes_accel_vncipher(t, k); + aes_accel_st(ret, t, be); +} + +static inline void +aesdec_ISB_ISR_IMC_AK_accel(AESState *ret, const AESState *st, + const AESState *rk, bool be) +{ + AESStateVec t, k, z = { }; + + t = aes_accel_ld(st, be); + k = aes_accel_ld(rk, be); + t = aes_accel_vncipher(t, z); + aes_accel_st(ret, t ^ k, be); +} +#else +/* Without ALTIVEC, we can't even write inline assembly. */ +#include "host/include/generic/host/crypto/aes-round.h" +#endif + +#endif /* PPC_HOST_CRYPTO_AES_ROUND_H */ diff --git a/host/include/ppc64/host/crypto/aes-round.h b/host/include/ppc64/host/crypto/aes-round.h new file mode 100644 index 0000000000..5eeba6dcb7 --- /dev/null +++ b/host/include/ppc64/host/crypto/aes-round.h @@ -0,0 +1 @@ +#include "host/include/ppc/host/crypto/aes-round.h" diff --git a/util/cpuinfo-ppc.c b/util/cpuinfo-ppc.c index d95adc8ccd..7212afa45d 100644 --- a/util/cpuinfo-ppc.c +++ b/util/cpuinfo-ppc.c @@ -48,6 +48,14 @@ unsigned __attribute__((constructor)) cpuinfo_init(void) /* We only care about the portion of VSX that overlaps Altivec. */ if (hwcap & PPC_FEATURE_HAS_VSX) { info |= CPUINFO_VSX; + /* + * We use VSX especially for little-endian, but we should + * always have both anyway, since VSX came with Power7 + * and crypto came with Power8. + */ + if (hwcap2 & PPC_FEATURE2_HAS_VEC_CRYPTO) { + info |= CPUINFO_CRYPTO; + } } }