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-rw-r--r--arch/s390/crypto/crypt_z990.h374
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diff --git a/arch/s390/crypto/crypt_z990.h b/arch/s390/crypto/crypt_z990.h
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-/*
- * 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
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