X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fs390%2Fcrypto%2Fcrypt_s390.h;h=2775d2618332d1a593e2aed4b3fb976b59a9d86a;hb=bd0561c9d8dcbf21cd9aa46c416bbf6a3a12e4b1;hp=d6712cfa6def498815a726710efad00ccaedaaee;hpb=bf754ae8ef8bc443c067601d9401103e4001e7c5;p=linux-2.6-omap-h63xx.git diff --git a/arch/s390/crypto/crypt_s390.h b/arch/s390/crypto/crypt_s390.h index d6712cfa6de..2775d261833 100644 --- a/arch/s390/crypto/crypt_s390.h +++ b/arch/s390/crypto/crypt_s390.h @@ -3,8 +3,9 @@ * * Support for s390 cryptographic instructions. * - * Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation - * Author(s): Thomas Spatzier (tspat@de.ibm.com) + * Copyright IBM Corp. 2003,2007 + * Author(s): Thomas Spatzier + * Jan Glauber (jan.glauber@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 @@ -20,6 +21,9 @@ #define CRYPT_S390_OP_MASK 0xFF00 #define CRYPT_S390_FUNC_MASK 0x00FF +#define CRYPT_S390_PRIORITY 300 +#define CRYPT_S390_COMPOSITE_PRIORITY 400 + /* s930 cryptographic operations */ enum crypt_s390_operations { CRYPT_S390_KM = 0x0100, @@ -29,7 +33,8 @@ enum crypt_s390_operations { CRYPT_S390_KMAC = 0x0500 }; -/* function codes for KM (CIPHER MESSAGE) instruction +/* + * function codes for KM (CIPHER MESSAGE) instruction * 0x80 is the decipher modifier bit */ enum crypt_s390_km_func { @@ -48,7 +53,8 @@ enum crypt_s390_km_func { KM_AES_256_DECRYPT = CRYPT_S390_KM | 0x14 | 0x80, }; -/* function codes for KMC (CIPHER MESSAGE WITH CHAINING) +/* + * function codes for KMC (CIPHER MESSAGE WITH CHAINING) * instruction */ enum crypt_s390_kmc_func { @@ -65,9 +71,11 @@ enum crypt_s390_kmc_func { KMC_AES_192_DECRYPT = CRYPT_S390_KMC | 0x13 | 0x80, KMC_AES_256_ENCRYPT = CRYPT_S390_KMC | 0x14, KMC_AES_256_DECRYPT = CRYPT_S390_KMC | 0x14 | 0x80, + KMC_PRNG = CRYPT_S390_KMC | 0x43, }; -/* function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) +/* + * function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) * instruction */ enum crypt_s390_kimd_func { @@ -76,7 +84,8 @@ enum crypt_s390_kimd_func { KIMD_SHA_256 = CRYPT_S390_KIMD | 2, }; -/* function codes for KLMD (COMPUTE LAST MESSAGE DIGEST) +/* + * function codes for KLMD (COMPUTE LAST MESSAGE DIGEST) * instruction */ enum crypt_s390_klmd_func { @@ -85,7 +94,8 @@ enum crypt_s390_klmd_func { KLMD_SHA_256 = CRYPT_S390_KLMD | 2, }; -/* function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) +/* + * function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) * instruction */ enum crypt_s390_kmac_func { @@ -95,303 +105,219 @@ enum crypt_s390_kmac_func { KMAC_TDEA_192 = CRYPT_S390_KMAC | 3 }; -/* status word for s390 crypto instructions' QUERY functions */ -struct crypt_s390_query_status { - u64 high; - u64 low; -}; - -/* - * Standard fixup and ex_table sections for crypt_s390 inline functions. - * label 0: the s390 crypto operation - * label 1: just after 1 to catch illegal operation exception - * (unsupported model) - * 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_s390_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_s390_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 s390 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_s390_set_result \ - " lr %0,%[result] \n" -#else /* __s390x__ */ -#define __crypt_s390_set_result \ - " lgr %0,%[result] \n" -#endif - -/* +/** + * crypt_s390_km: + * @func: the function code passed to KM; see crypt_s390_km_func + * @param: address of parameter block; see POP for details on each func + * @dest: address of destination memory area + * @src: address of source memory area + * @src_len: length of src operand in bytes + * * Executes the KM (CIPHER MESSAGE) operation of the CPU. - * @param func: the function code passed to KM; see crypt_s390_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 + * + * Returns -1 for failure, 0 for the query func, number of processed + * bytes for encryption/decryption funcs */ -static inline int -crypt_s390_km(long func, void* param, u8* dest, const u8* src, long src_len) +static inline int crypt_s390_km(long func, void *param, + u8 *dest, const u8 *src, long src_len) { register long __func asm("0") = func & CRYPT_S390_FUNC_MASK; - register void* __param asm("1") = param; - register u8* __dest asm("4") = dest; - register const u8* __src asm("2") = src; + register void *__param asm("1") = param; + register const u8 *__src asm("2") = src; register long __src_len asm("3") = src_len; + register u8 *__dest asm("4") = dest; int ret; - ret = 0; - __asm__ __volatile__ ( - "0: .insn rre,0xB92E0000,%1,%2 \n" /* KM opcode */ + asm volatile( + "0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */ "1: brc 1,0b \n" /* handle partial completion */ - __crypt_s390_set_result - "6: \n" - __crypt_s390_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_S390_FUNC_MASK){ - ret = src_len - ret; - } - return ret; + " la %0,0\n" + "2:\n" + EX_TABLE(0b,2b) EX_TABLE(1b,2b) + : "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest) + : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory"); + if (ret < 0) + return ret; + return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len; } -/* +/** + * crypt_s390_kmc: + * @func: the function code passed to KM; see crypt_s390_kmc_func + * @param: address of parameter block; see POP for details on each func + * @dest: address of destination memory area + * @src: address of source memory area + * @src_len: length of src operand in bytes + * * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU. - * @param func: the function code passed to KM; see crypt_s390_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 + * + * Returns -1 for failure, 0 for the query func, number of processed + * bytes for encryption/decryption funcs */ -static inline int -crypt_s390_kmc(long func, void* param, u8* dest, const u8* src, long src_len) +static inline int crypt_s390_kmc(long func, void *param, + u8 *dest, const u8 *src, long src_len) { register long __func asm("0") = func & CRYPT_S390_FUNC_MASK; - register void* __param asm("1") = param; - register u8* __dest asm("4") = dest; - register const u8* __src asm("2") = src; + register void *__param asm("1") = param; + register const u8 *__src asm("2") = src; register long __src_len asm("3") = src_len; + register u8 *__dest asm("4") = dest; int ret; - ret = 0; - __asm__ __volatile__ ( - "0: .insn rre,0xB92F0000,%1,%2 \n" /* KMC opcode */ + asm volatile( + "0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */ "1: brc 1,0b \n" /* handle partial completion */ - __crypt_s390_set_result - "6: \n" - __crypt_s390_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_S390_FUNC_MASK){ - ret = src_len - ret; - } - return ret; + " la %0,0\n" + "2:\n" + EX_TABLE(0b,2b) EX_TABLE(1b,2b) + : "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest) + : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory"); + if (ret < 0) + return ret; + return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len; } -/* +/** + * crypt_s390_kimd: + * @func: the function code passed to KM; see crypt_s390_kimd_func + * @param: address of parameter block; see POP for details on each func + * @src: address of source memory area + * @src_len: length of src operand in bytes + * * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation * of the CPU. - * @param func: the function code passed to KM; see crypt_s390_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 + * + * Returns -1 for failure, 0 for the query func, number of processed + * bytes for digest funcs */ -static inline int -crypt_s390_kimd(long func, void* param, const u8* src, long src_len) +static inline int crypt_s390_kimd(long func, void *param, + const u8 *src, long src_len) { register long __func asm("0") = func & CRYPT_S390_FUNC_MASK; - register void* __param asm("1") = param; - register const u8* __src asm("2") = src; + 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 */ - __crypt_s390_set_result - "6: \n" - __crypt_s390_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_S390_FUNC_MASK)){ - ret = src_len - ret; - } - return ret; + asm volatile( + "0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */ + "1: brc 1,0b \n" /* handle partial completion */ + " la %0,0\n" + "2:\n" + EX_TABLE(0b,2b) EX_TABLE(1b,2b) + : "=d" (ret), "+a" (__src), "+d" (__src_len) + : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory"); + if (ret < 0) + return ret; + return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len; } -/* +/** + * crypt_s390_klmd: + * @func: the function code passed to KM; see crypt_s390_klmd_func + * @param: address of parameter block; see POP for details on each func + * @src: address of source memory area + * @src_len: length of src operand in bytes + * * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU. - * @param func: the function code passed to KM; see crypt_s390_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 + * + * Returns -1 for failure, 0 for the query func, number of processed + * bytes for digest funcs */ -static inline int -crypt_s390_klmd(long func, void* param, const u8* src, long src_len) +static inline int crypt_s390_klmd(long func, void *param, + const u8 *src, long src_len) { register long __func asm("0") = func & CRYPT_S390_FUNC_MASK; - register void* __param asm("1") = param; - register const u8* __src asm("2") = src; + 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 */ - __crypt_s390_set_result - "6: \n" - __crypt_s390_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_S390_FUNC_MASK){ - ret = src_len - ret; - } - return ret; + asm volatile( + "0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */ + "1: brc 1,0b \n" /* handle partial completion */ + " la %0,0\n" + "2:\n" + EX_TABLE(0b,2b) EX_TABLE(1b,2b) + : "=d" (ret), "+a" (__src), "+d" (__src_len) + : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory"); + if (ret < 0) + return ret; + return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len; } -/* +/** + * crypt_s390_kmac: + * @func: the function code passed to KM; see crypt_s390_klmd_func + * @param: address of parameter block; see POP for details on each func + * @src: address of source memory area + * @src_len: length of src operand in bytes + * * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation * of the CPU. - * @param func: the function code passed to KM; see crypt_s390_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 + * + * Returns -1 for failure, 0 for the query func, number of processed + * bytes for digest funcs */ -static inline int -crypt_s390_kmac(long func, void* param, const u8* src, long src_len) +static inline int crypt_s390_kmac(long func, void *param, + const u8 *src, long src_len) { register long __func asm("0") = func & CRYPT_S390_FUNC_MASK; - register void* __param asm("1") = param; - register const u8* __src asm("2") = src; + 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 */ - __crypt_s390_set_result - "6: \n" - __crypt_s390_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_S390_FUNC_MASK){ - ret = src_len - ret; - } - return ret; + asm volatile( + "0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */ + "1: brc 1,0b \n" /* handle partial completion */ + " la %0,0\n" + "2:\n" + EX_TABLE(0b,2b) EX_TABLE(1b,2b) + : "=d" (ret), "+a" (__src), "+d" (__src_len) + : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory"); + if (ret < 0) + return ret; + return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len; } /** + * crypt_s390_func_available: + * @func: the function code of the specific function; 0 if op in general + * * Tests if a specific 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 + * + * Returns 1 if func available; 0 if func or op in general not available */ -static inline int -crypt_s390_func_available(int func) +static inline int crypt_s390_func_available(int func) { + unsigned char status[16]; int ret; - struct crypt_s390_query_status status = { - .high = 0, - .low = 0 - }; - switch (func & CRYPT_S390_OP_MASK){ - case CRYPT_S390_KM: - ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0); - break; - case CRYPT_S390_KMC: - ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0); - break; - case CRYPT_S390_KIMD: - ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0); - break; - case CRYPT_S390_KLMD: - ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0); - break; - case CRYPT_S390_KMAC: - ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0); - break; - default: - ret = 0; - return ret; - } - if (ret >= 0){ - func &= CRYPT_S390_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; + switch (func & CRYPT_S390_OP_MASK) { + case CRYPT_S390_KM: + ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0); + break; + case CRYPT_S390_KMC: + ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0); + break; + case CRYPT_S390_KIMD: + ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0); + break; + case CRYPT_S390_KLMD: + ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0); + break; + case CRYPT_S390_KMAC: + ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0); + break; + default: + return 0; } - return ret; + if (ret < 0) + return 0; + func &= CRYPT_S390_FUNC_MASK; + func &= 0x7f; /* mask modifier bit */ + return (status[func >> 3] & (0x80 >> (func & 7))) != 0; } -#endif // _CRYPTO_ARCH_S390_CRYPT_S390_H +#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */