diff options
Diffstat (limited to 'host/include/ppc')
| -rw-r--r-- | host/include/ppc/host/cpuinfo.h | 30 | ||||
| -rw-r--r-- | host/include/ppc/host/crypto/aes-round.h | 182 |
2 files changed, 212 insertions, 0 deletions
diff --git a/host/include/ppc/host/cpuinfo.h b/host/include/ppc/host/cpuinfo.h new file mode 100644 index 0000000000..29ee7f9ef8 --- /dev/null +++ b/host/include/ppc/host/cpuinfo.h @@ -0,0 +1,30 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Host specific cpu indentification for ppc. + */ + +#ifndef HOST_CPUINFO_H +#define HOST_CPUINFO_H + +/* Digested version of <cpuid.h> */ + +#define CPUINFO_ALWAYS (1u << 0) /* so cpuinfo is nonzero */ +#define CPUINFO_V2_06 (1u << 1) +#define CPUINFO_V2_07 (1u << 2) +#define CPUINFO_V3_0 (1u << 3) +#define CPUINFO_V3_1 (1u << 4) +#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; + +/* + * We cannot rely on constructor ordering, so other constructors must + * use the function interface rather than the variable above. + */ +unsigned cpuinfo_init(void); + +#endif /* HOST_CPUINFO_H */ 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 <altivec.h>, 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 */ |