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Diffstat (limited to 'arch/s390/crypto/crypt_z990.h')
| -rw-r--r-- | arch/s390/crypto/crypt_z990.h | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/arch/s390/crypto/crypt_z990.h b/arch/s390/crypto/crypt_z990.h new file mode 100644 index 000000000000..4df660b99e5a --- /dev/null +++ b/arch/s390/crypto/crypt_z990.h @@ -0,0 +1,374 @@ +/* + * Cryptographic API. + * + * Support for z990 cryptographic instructions. + * + * Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation + * Author(s): Thomas Spatzier (tspat@de.ibm.com) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ +#ifndef _CRYPTO_ARCH_S390_CRYPT_Z990_H +#define _CRYPTO_ARCH_S390_CRYPT_Z990_H + +#include <asm/errno.h> + +#define CRYPT_Z990_OP_MASK 0xFF00 +#define CRYPT_Z990_FUNC_MASK 0x00FF + + +/*z990 cryptographic operations*/ +enum crypt_z990_operations { + CRYPT_Z990_KM = 0x0100, + CRYPT_Z990_KMC = 0x0200, + CRYPT_Z990_KIMD = 0x0300, + CRYPT_Z990_KLMD = 0x0400, + CRYPT_Z990_KMAC = 0x0500 +}; + +/*function codes for KM (CIPHER MESSAGE) instruction*/ +enum crypt_z990_km_func { + KM_QUERY = CRYPT_Z990_KM | 0, + KM_DEA_ENCRYPT = CRYPT_Z990_KM | 1, + KM_DEA_DECRYPT = CRYPT_Z990_KM | 1 | 0x80, //modifier bit->decipher + KM_TDEA_128_ENCRYPT = CRYPT_Z990_KM | 2, + KM_TDEA_128_DECRYPT = CRYPT_Z990_KM | 2 | 0x80, + KM_TDEA_192_ENCRYPT = CRYPT_Z990_KM | 3, + KM_TDEA_192_DECRYPT = CRYPT_Z990_KM | 3 | 0x80, +}; + +/*function codes for KMC (CIPHER MESSAGE WITH CHAINING) instruction*/ +enum crypt_z990_kmc_func { + KMC_QUERY = CRYPT_Z990_KMC | 0, + KMC_DEA_ENCRYPT = CRYPT_Z990_KMC | 1, + KMC_DEA_DECRYPT = CRYPT_Z990_KMC | 1 | 0x80, //modifier bit->decipher + KMC_TDEA_128_ENCRYPT = CRYPT_Z990_KMC | 2, + KMC_TDEA_128_DECRYPT = CRYPT_Z990_KMC | 2 | 0x80, + KMC_TDEA_192_ENCRYPT = CRYPT_Z990_KMC | 3, + KMC_TDEA_192_DECRYPT = CRYPT_Z990_KMC | 3 | 0x80, +}; + +/*function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) instruction*/ +enum crypt_z990_kimd_func { + KIMD_QUERY = CRYPT_Z990_KIMD | 0, + KIMD_SHA_1 = CRYPT_Z990_KIMD | 1, +}; + +/*function codes for KLMD (COMPUTE LAST MESSAGE DIGEST) instruction*/ +enum crypt_z990_klmd_func { + KLMD_QUERY = CRYPT_Z990_KLMD | 0, + KLMD_SHA_1 = CRYPT_Z990_KLMD | 1, +}; + +/*function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) instruction*/ +enum crypt_z990_kmac_func { + KMAC_QUERY = CRYPT_Z990_KMAC | 0, + KMAC_DEA = CRYPT_Z990_KMAC | 1, + KMAC_TDEA_128 = CRYPT_Z990_KMAC | 2, + KMAC_TDEA_192 = CRYPT_Z990_KMAC | 3 +}; + +/*status word for z990 crypto instructions' QUERY functions*/ +struct crypt_z990_query_status { + u64 high; + u64 low; +}; + +/* + * Standard fixup and ex_table sections for crypt_z990 inline functions. + * label 0: the z990 crypto operation + * label 1: just after 1 to catch illegal operation exception on non-z990 + * label 6: the return point after fixup + * label 7: set error value if exception _in_ crypto operation + * label 8: set error value if illegal operation exception + * [ret] is the variable to receive the error code + * [ERR] is the error code value + */ +#ifndef __s390x__ +#define __crypt_z990_fixup \ + ".section .fixup,\"ax\" \n" \ + "7: lhi %0,%h[e1] \n" \ + " bras 1,9f \n" \ + " .long 6b \n" \ + "8: lhi %0,%h[e2] \n" \ + " bras 1,9f \n" \ + " .long 6b \n" \ + "9: l 1,0(1) \n" \ + " br 1 \n" \ + ".previous \n" \ + ".section __ex_table,\"a\" \n" \ + " .align 4 \n" \ + " .long 0b,7b \n" \ + " .long 1b,8b \n" \ + ".previous" +#else /* __s390x__ */ +#define __crypt_z990_fixup \ + ".section .fixup,\"ax\" \n" \ + "7: lhi %0,%h[e1] \n" \ + " jg 6b \n" \ + "8: lhi %0,%h[e2] \n" \ + " jg 6b \n" \ + ".previous\n" \ + ".section __ex_table,\"a\" \n" \ + " .align 8 \n" \ + " .quad 0b,7b \n" \ + " .quad 1b,8b \n" \ + ".previous" +#endif /* __s390x__ */ + +/* + * Standard code for setting the result of z990 crypto instructions. + * %0: the register which will receive the result + * [result]: the register containing the result (e.g. second operand length + * to compute number of processed bytes]. + */ +#ifndef __s390x__ +#define __crypt_z990_set_result \ + " lr %0,%[result] \n" +#else /* __s390x__ */ +#define __crypt_z990_set_result \ + " lgr %0,%[result] \n" +#endif + +/* + * Executes the KM (CIPHER MESSAGE) operation of the z990 CPU. + * @param func: the function code passed to KM; see crypt_z990_km_func + * @param param: address of parameter block; see POP for details on each func + * @param dest: address of destination memory area + * @param src: address of source memory area + * @param src_len: length of src operand in bytes + * @returns < zero for failure, 0 for the query func, number of processed bytes + * for encryption/decryption funcs + */ +static inline int +crypt_z990_km(long func, void* param, u8* dest, const u8* src, long src_len) +{ + register long __func asm("0") = func & CRYPT_Z990_FUNC_MASK; + register void* __param asm("1") = param; + register u8* __dest asm("4") = dest; + register const u8* __src asm("2") = src; + register long __src_len asm("3") = src_len; + int ret; + + ret = 0; + __asm__ __volatile__ ( + "0: .insn rre,0xB92E0000,%1,%2 \n" //KM opcode + "1: brc 1,0b \n" //handle partial completion + __crypt_z990_set_result + "6: \n" + __crypt_z990_fixup + : "+d" (ret), "+a" (__dest), "+a" (__src), + [result] "+d" (__src_len) + : [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func), + "a" (__param) + : "cc", "memory" + ); + if (ret >= 0 && func & CRYPT_Z990_FUNC_MASK){ + ret = src_len - ret; + } + return ret; +} + +/* + * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the z990 CPU. + * @param func: the function code passed to KM; see crypt_z990_kmc_func + * @param param: address of parameter block; see POP for details on each func + * @param dest: address of destination memory area + * @param src: address of source memory area + * @param src_len: length of src operand in bytes + * @returns < zero for failure, 0 for the query func, number of processed bytes + * for encryption/decryption funcs + */ +static inline int +crypt_z990_kmc(long func, void* param, u8* dest, const u8* src, long src_len) +{ + register long __func asm("0") = func & CRYPT_Z990_FUNC_MASK; + register void* __param asm("1") = param; + register u8* __dest asm("4") = dest; + register const u8* __src asm("2") = src; + register long __src_len asm("3") = src_len; + int ret; + + ret = 0; + __asm__ __volatile__ ( + "0: .insn rre,0xB92F0000,%1,%2 \n" //KMC opcode + "1: brc 1,0b \n" //handle partial completion + __crypt_z990_set_result + "6: \n" + __crypt_z990_fixup + : "+d" (ret), "+a" (__dest), "+a" (__src), + [result] "+d" (__src_len) + : [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func), + "a" (__param) + : "cc", "memory" + ); + if (ret >= 0 && func & CRYPT_Z990_FUNC_MASK){ + ret = src_len - ret; + } + return ret; +} + +/* + * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation + * of the z990 CPU. + * @param func: the function code passed to KM; see crypt_z990_kimd_func + * @param param: address of parameter block; see POP for details on each func + * @param src: address of source memory area + * @param src_len: length of src operand in bytes + * @returns < zero for failure, 0 for the query func, number of processed bytes + * for digest funcs + */ +static inline int +crypt_z990_kimd(long func, void* param, const u8* src, long src_len) +{ + register long __func asm("0") = func & CRYPT_Z990_FUNC_MASK; + register void* __param asm("1") = param; + register const u8* __src asm("2") = src; + register long __src_len asm("3") = src_len; + int ret; + + ret = 0; + __asm__ __volatile__ ( + "0: .insn rre,0xB93E0000,%1,%1 \n" //KIMD opcode + "1: brc 1,0b \n" /*handle partical completion of kimd*/ + __crypt_z990_set_result + "6: \n" + __crypt_z990_fixup + : "+d" (ret), "+a" (__src), [result] "+d" (__src_len) + : [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func), + "a" (__param) + : "cc", "memory" + ); + if (ret >= 0 && (func & CRYPT_Z990_FUNC_MASK)){ + ret = src_len - ret; + } + return ret; +} + +/* + * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the z990 CPU. + * @param func: the function code passed to KM; see crypt_z990_klmd_func + * @param param: address of parameter block; see POP for details on each func + * @param src: address of source memory area + * @param src_len: length of src operand in bytes + * @returns < zero for failure, 0 for the query func, number of processed bytes + * for digest funcs + */ +static inline int +crypt_z990_klmd(long func, void* param, const u8* src, long src_len) +{ + register long __func asm("0") = func & CRYPT_Z990_FUNC_MASK; + register void* __param asm("1") = param; + register const u8* __src asm("2") = src; + register long __src_len asm("3") = src_len; + int ret; + + ret = 0; + __asm__ __volatile__ ( + "0: .insn rre,0xB93F0000,%1,%1 \n" //KLMD opcode + "1: brc 1,0b \n" /*handle partical completion of klmd*/ + __crypt_z990_set_result + "6: \n" + __crypt_z990_fixup + : "+d" (ret), "+a" (__src), [result] "+d" (__src_len) + : [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func), + "a" (__param) + : "cc", "memory" + ); + if (ret >= 0 && func & CRYPT_Z990_FUNC_MASK){ + ret = src_len - ret; + } + return ret; +} + +/* + * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation + * of the z990 CPU. + * @param func: the function code passed to KM; see crypt_z990_klmd_func + * @param param: address of parameter block; see POP for details on each func + * @param src: address of source memory area + * @param src_len: length of src operand in bytes + * @returns < zero for failure, 0 for the query func, number of processed bytes + * for digest funcs + */ +static inline int +crypt_z990_kmac(long func, void* param, const u8* src, long src_len) +{ + register long __func asm("0") = func & CRYPT_Z990_FUNC_MASK; + register void* __param asm("1") = param; + register const u8* __src asm("2") = src; + register long __src_len asm("3") = src_len; + int ret; + + ret = 0; + __asm__ __volatile__ ( + "0: .insn rre,0xB91E0000,%5,%5 \n" //KMAC opcode + "1: brc 1,0b \n" /*handle partical completion of klmd*/ + __crypt_z990_set_result + "6: \n" + __crypt_z990_fixup + : "+d" (ret), "+a" (__src), [result] "+d" (__src_len) + : [e1] "K" (-EFAULT), [e2] "K" (-ENOSYS), "d" (__func), + "a" (__param) + : "cc", "memory" + ); + if (ret >= 0 && func & CRYPT_Z990_FUNC_MASK){ + ret = src_len - ret; + } + return ret; +} + +/** + * Tests if a specific z990 crypto function is implemented on the machine. + * @param func: the function code of the specific function; 0 if op in general + * @return 1 if func available; 0 if func or op in general not available + */ +static inline int +crypt_z990_func_available(int func) +{ + int ret; + + struct crypt_z990_query_status status = { + .high = 0, + .low = 0 + }; + switch (func & CRYPT_Z990_OP_MASK){ + case CRYPT_Z990_KM: + ret = crypt_z990_km(KM_QUERY, &status, NULL, NULL, 0); + break; + case CRYPT_Z990_KMC: + ret = crypt_z990_kmc(KMC_QUERY, &status, NULL, NULL, 0); + break; + case CRYPT_Z990_KIMD: + ret = crypt_z990_kimd(KIMD_QUERY, &status, NULL, 0); + break; + case CRYPT_Z990_KLMD: + ret = crypt_z990_klmd(KLMD_QUERY, &status, NULL, 0); + break; + case CRYPT_Z990_KMAC: + ret = crypt_z990_kmac(KMAC_QUERY, &status, NULL, 0); + break; + default: + ret = 0; + return ret; + } + if (ret >= 0){ + func &= CRYPT_Z990_FUNC_MASK; + func &= 0x7f; //mask modifier bit + if (func < 64){ + ret = (status.high >> (64 - func - 1)) & 0x1; + } else { + ret = (status.low >> (128 - func - 1)) & 0x1; + } + } else { + ret = 0; + } + return ret; +} + + +#endif // _CRYPTO_ARCH_S390_CRYPT_Z990_H |