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charset="utf-8" Support the subfunctions CPACF_KMC_AES_128, CPACF_KMC_AES_192 and CPACF_KMC_AES_256 for the cpacf kmc instruction. Signed-off-by: Harald Freudenberger --- target/s390x/gen-features.c | 3 + target/s390x/tcg/cpacf.h | 3 + target/s390x/tcg/cpacf_aes.c | 100 +++++++++++++++++++++++++++++++ target/s390x/tcg/crypto_helper.c | 23 +++++++ 4 files changed, 129 insertions(+) diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index a35d1fd2f9..9c0c0b229f 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -924,6 +924,9 @@ static uint16_t qemu_MAX[] =3D { S390_FEAT_KM_AES_128, S390_FEAT_KM_AES_192, S390_FEAT_KM_AES_256, + S390_FEAT_KMC_AES_128, + S390_FEAT_KMC_AES_192, + S390_FEAT_KMC_AES_256, }; =20 /****** END FEATURE DEFS ******/ diff --git a/target/s390x/tcg/cpacf.h b/target/s390x/tcg/cpacf.h index 06423abc00..18686991f7 100644 --- a/target/s390x/tcg/cpacf.h +++ b/target/s390x/tcg/cpacf.h @@ -20,5 +20,8 @@ int cpacf_sha512(CPUS390XState *env, uintptr_t ra, uint64= _t param_addr, int cpacf_aes_ecb(CPUS390XState *env, uintptr_t ra, uint64_t param_addr, uint64_t *dst_ptr, uint64_t *src_ptr, uint64_t *src_len, uint32_t type, uint8_t fc, uint8_t mod); +int cpacf_aes_cbc(CPUS390XState *env, uintptr_t ra, uint64_t param_addr, + uint64_t *dst_ptr, uint64_t *src_ptr, uint64_t *src_len, + uint32_t type, uint8_t fc, uint8_t mod); =20 #endif diff --git a/target/s390x/tcg/cpacf_aes.c b/target/s390x/tcg/cpacf_aes.c index 6d234d8ce9..df3d05db41 100644 --- a/target/s390x/tcg/cpacf_aes.c +++ b/target/s390x/tcg/cpacf_aes.c @@ -106,3 +106,103 @@ int cpacf_aes_ecb(CPUS390XState *env, uintptr_t ra, u= int64_t param_addr, =20 return !len ? 0 : 3; } + +static void aes_xor(const uint8_t *src1, const uint8_t *src2, uint8_t *dst) +{ + int i; + + for (i =3D 0; i < AES_BLOCK_SIZE / sizeof(uint32_t); i++) { + ((uint32_t *)dst)[i] =3D ((uint32_t *)src1)[i] ^ ((uint32_t *)src2= )[i]; + } +} + +int cpacf_aes_cbc(CPUS390XState *env, uintptr_t ra, uint64_t param_addr, + uint64_t *dst_ptr, uint64_t *src_ptr, uint64_t *src_len, + uint32_t type, uint8_t fc, uint8_t mod) +{ + enum { MAX_BLOCKS_PER_RUN =3D 8192 / AES_BLOCK_SIZE }; + uint8_t in[AES_BLOCK_SIZE], out[AES_BLOCK_SIZE], buf[AES_BLOCK_SIZE]; + uint64_t addr, len =3D *src_len, processed =3D 0; + int i, keysize, data_reg_len =3D 64; + uint8_t key[32], iv[AES_BLOCK_SIZE]; + AES_KEY exkey; + + g_assert(type =3D=3D S390_FEAT_TYPE_KMC); + + switch (fc) { + case 0x12: /* CPACF_KMC_AES_128 */ + keysize =3D 16; + break; + case 0x13: /* CPACF_KMC_AES_192 */ + keysize =3D 24; + break; + case 0x14: /* CPACF_KMC_AES_256 */ + keysize =3D 32; + break; + default: + g_assert_not_reached(); + } + + if (!(env->psw.mask & PSW_MASK_64)) { + len =3D (uint32_t)len; + data_reg_len =3D (env->psw.mask & PSW_MASK_32) ? 32 : 24; + } + + /* length has to be properly aligned. */ + if (!QEMU_IS_ALIGNED(len, AES_BLOCK_SIZE)) { + tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); + } + + /* fetch iv from param blick */ + for (i =3D 0; i < AES_BLOCK_SIZE; i++) { + addr =3D wrap_address(env, param_addr + i); + iv[i] =3D cpu_ldub_data_ra(env, addr, ra); + } + + /* fetch key from param block */ + for (i =3D 0; i < keysize; i++) { + addr =3D wrap_address(env, param_addr + AES_BLOCK_SIZE + i); + key[i] =3D cpu_ldub_data_ra(env, addr, ra); + } + + /* expand key */ + if (mod) { + AES_set_decrypt_key(key, keysize * 8, &exkey); + } else { + AES_set_encrypt_key(key, keysize * 8, &exkey); + } + + /* process up to MAX_BLOCKS_PER_RUN aes blocks */ + for (i =3D 0; i < MAX_BLOCKS_PER_RUN && len >=3D AES_BLOCK_SIZE; i++) { + aes_read_block(env, *src_ptr + processed, in, ra); + if (mod) { + /* decrypt in =3D> buf */ + AES_decrypt(in, buf, &exkey); + /* buf xor iv =3D> out */ + aes_xor(buf, iv, out); + /* prep iv for next round */ + memcpy(iv, in, AES_BLOCK_SIZE); + } else { + /* in xor iv =3D> buf */ + aes_xor(in, iv, buf); + /* encrypt buf =3D> out */ + AES_encrypt(buf, out, &exkey); + /* prep iv for next round */ + memcpy(iv, out, AES_BLOCK_SIZE); + } + aes_write_block(env, *dst_ptr + processed, out, ra); + len -=3D AES_BLOCK_SIZE, processed +=3D AES_BLOCK_SIZE; + } + + /* update iv in param block */ + for (i =3D 0; i < AES_BLOCK_SIZE; i++) { + addr =3D wrap_address(env, param_addr + i); + cpu_stb_data_ra(env, addr, iv[i], ra); + } + + *src_ptr =3D deposit64(*src_ptr, 0, data_reg_len, *src_ptr + processed= ); + *dst_ptr =3D deposit64(*dst_ptr, 0, data_reg_len, *dst_ptr + processed= ); + *src_len -=3D processed; + + return !len ? 0 : 3; +} diff --git a/target/s390x/tcg/crypto_helper.c b/target/s390x/tcg/crypto_hel= per.c index dff119176e..df01c1c54e 100644 --- a/target/s390x/tcg/crypto_helper.c +++ b/target/s390x/tcg/crypto_helper.c @@ -108,6 +108,26 @@ static int cpacf_km(CPUS390XState *env, uintptr_t ra, = uint32_t r1, return rc; } =20 +static int cpacf_kmc(CPUS390XState *env, uintptr_t ra, uint32_t r1, + uint32_t r2, uint32_t r3, uint8_t fc, uint8_t mod) +{ + int rc =3D 0; + + switch (fc) { + case 0x12: /* CPACF_KMC_AES_128 */ + case 0x13: /* CPACF_KMC_AES_192 */ + case 0x14: /* CPACF_KMC_AES_256 */ + rc =3D cpacf_aes_cbc(env, ra, env->regs[1], + &env->regs[r1], &env->regs[r2], &env->regs[r2 += 1], + S390_FEAT_TYPE_KMC, fc, mod); + break; + default: + g_assert_not_reached(); + } + + return rc; +} + static int cpacf_ppno(CPUS390XState *env, uintptr_t ra, uint32_t r1, uint32_t r2, uint32_t r3, uint8_t fc) { @@ -175,6 +195,9 @@ uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, u= int32_t r2, uint32_t r3, case S390_FEAT_TYPE_KM: rc =3D cpacf_km(env, ra, r1, r2, r3, fc, mod); break; + case S390_FEAT_TYPE_KMC: + rc =3D cpacf_kmc(env, ra, r1, r2, r3, fc, mod); + break; default: g_assert_not_reached(); } --=20 2.43.0