4 * Support for s390 cryptographic instructions.
6 * Copyright IBM Corp. 2003,2007
7 * Author(s): Thomas Spatzier
8 * Jan Glauber (jan.glauber@de.ibm.com)
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 2 of the License, or (at your option)
16 #ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
17 #define _CRYPTO_ARCH_S390_CRYPT_S390_H
19 #include <asm/errno.h>
21 #define CRYPT_S390_OP_MASK 0xFF00
22 #define CRYPT_S390_FUNC_MASK 0x00FF
24 #define CRYPT_S390_PRIORITY 300
25 #define CRYPT_S390_COMPOSITE_PRIORITY 400
27 /* s390 cryptographic operations */
28 enum crypt_s390_operations {
29 CRYPT_S390_KM = 0x0100,
30 CRYPT_S390_KMC = 0x0200,
31 CRYPT_S390_KIMD = 0x0300,
32 CRYPT_S390_KLMD = 0x0400,
33 CRYPT_S390_KMAC = 0x0500
37 * function codes for KM (CIPHER MESSAGE) instruction
38 * 0x80 is the decipher modifier bit
40 enum crypt_s390_km_func {
41 KM_QUERY = CRYPT_S390_KM | 0x0,
42 KM_DEA_ENCRYPT = CRYPT_S390_KM | 0x1,
43 KM_DEA_DECRYPT = CRYPT_S390_KM | 0x1 | 0x80,
44 KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
45 KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
46 KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
47 KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
48 KM_AES_128_ENCRYPT = CRYPT_S390_KM | 0x12,
49 KM_AES_128_DECRYPT = CRYPT_S390_KM | 0x12 | 0x80,
50 KM_AES_192_ENCRYPT = CRYPT_S390_KM | 0x13,
51 KM_AES_192_DECRYPT = CRYPT_S390_KM | 0x13 | 0x80,
52 KM_AES_256_ENCRYPT = CRYPT_S390_KM | 0x14,
53 KM_AES_256_DECRYPT = CRYPT_S390_KM | 0x14 | 0x80,
57 * function codes for KMC (CIPHER MESSAGE WITH CHAINING)
60 enum crypt_s390_kmc_func {
61 KMC_QUERY = CRYPT_S390_KMC | 0x0,
62 KMC_DEA_ENCRYPT = CRYPT_S390_KMC | 0x1,
63 KMC_DEA_DECRYPT = CRYPT_S390_KMC | 0x1 | 0x80,
64 KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
65 KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
66 KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
67 KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
68 KMC_AES_128_ENCRYPT = CRYPT_S390_KMC | 0x12,
69 KMC_AES_128_DECRYPT = CRYPT_S390_KMC | 0x12 | 0x80,
70 KMC_AES_192_ENCRYPT = CRYPT_S390_KMC | 0x13,
71 KMC_AES_192_DECRYPT = CRYPT_S390_KMC | 0x13 | 0x80,
72 KMC_AES_256_ENCRYPT = CRYPT_S390_KMC | 0x14,
73 KMC_AES_256_DECRYPT = CRYPT_S390_KMC | 0x14 | 0x80,
74 KMC_PRNG = CRYPT_S390_KMC | 0x43,
78 * function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
81 enum crypt_s390_kimd_func {
82 KIMD_QUERY = CRYPT_S390_KIMD | 0,
83 KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
84 KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
88 * function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
91 enum crypt_s390_klmd_func {
92 KLMD_QUERY = CRYPT_S390_KLMD | 0,
93 KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
94 KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
98 * function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
101 enum crypt_s390_kmac_func {
102 KMAC_QUERY = CRYPT_S390_KMAC | 0,
103 KMAC_DEA = CRYPT_S390_KMAC | 1,
104 KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
105 KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
110 * @func: the function code passed to KM; see crypt_s390_km_func
111 * @param: address of parameter block; see POP for details on each func
112 * @dest: address of destination memory area
113 * @src: address of source memory area
114 * @src_len: length of src operand in bytes
116 * Executes the KM (CIPHER MESSAGE) operation of the CPU.
118 * Returns -1 for failure, 0 for the query func, number of processed
119 * bytes for encryption/decryption funcs
121 static inline int crypt_s390_km(long func, void *param,
122 u8 *dest, const u8 *src, long src_len)
124 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
125 register void *__param asm("1") = param;
126 register const u8 *__src asm("2") = src;
127 register long __src_len asm("3") = src_len;
128 register u8 *__dest asm("4") = dest;
132 "0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
133 "1: brc 1,0b \n" /* handle partial completion */
136 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
137 : "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
138 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
141 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
146 * @func: the function code passed to KM; see crypt_s390_kmc_func
147 * @param: address of parameter block; see POP for details on each func
148 * @dest: address of destination memory area
149 * @src: address of source memory area
150 * @src_len: length of src operand in bytes
152 * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
154 * Returns -1 for failure, 0 for the query func, number of processed
155 * bytes for encryption/decryption funcs
157 static inline int crypt_s390_kmc(long func, void *param,
158 u8 *dest, const u8 *src, long src_len)
160 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
161 register void *__param asm("1") = param;
162 register const u8 *__src asm("2") = src;
163 register long __src_len asm("3") = src_len;
164 register u8 *__dest asm("4") = dest;
168 "0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
169 "1: brc 1,0b \n" /* handle partial completion */
172 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
173 : "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
174 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
177 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
182 * @func: the function code passed to KM; see crypt_s390_kimd_func
183 * @param: address of parameter block; see POP for details on each func
184 * @src: address of source memory area
185 * @src_len: length of src operand in bytes
187 * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
190 * Returns -1 for failure, 0 for the query func, number of processed
191 * bytes for digest funcs
193 static inline int crypt_s390_kimd(long func, void *param,
194 const u8 *src, long src_len)
196 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
197 register void *__param asm("1") = param;
198 register const u8 *__src asm("2") = src;
199 register long __src_len asm("3") = src_len;
203 "0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
204 "1: brc 1,0b \n" /* handle partial completion */
207 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
208 : "=d" (ret), "+a" (__src), "+d" (__src_len)
209 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
212 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
217 * @func: the function code passed to KM; see crypt_s390_klmd_func
218 * @param: address of parameter block; see POP for details on each func
219 * @src: address of source memory area
220 * @src_len: length of src operand in bytes
222 * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
224 * Returns -1 for failure, 0 for the query func, number of processed
225 * bytes for digest funcs
227 static inline int crypt_s390_klmd(long func, void *param,
228 const u8 *src, long src_len)
230 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
231 register void *__param asm("1") = param;
232 register const u8 *__src asm("2") = src;
233 register long __src_len asm("3") = src_len;
237 "0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
238 "1: brc 1,0b \n" /* handle partial completion */
241 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
242 : "=d" (ret), "+a" (__src), "+d" (__src_len)
243 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
246 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
251 * @func: the function code passed to KM; see crypt_s390_klmd_func
252 * @param: address of parameter block; see POP for details on each func
253 * @src: address of source memory area
254 * @src_len: length of src operand in bytes
256 * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
259 * Returns -1 for failure, 0 for the query func, number of processed
260 * bytes for digest funcs
262 static inline int crypt_s390_kmac(long func, void *param,
263 const u8 *src, long src_len)
265 register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
266 register void *__param asm("1") = param;
267 register const u8 *__src asm("2") = src;
268 register long __src_len asm("3") = src_len;
272 "0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
273 "1: brc 1,0b \n" /* handle partial completion */
276 EX_TABLE(0b,2b) EX_TABLE(1b,2b)
277 : "=d" (ret), "+a" (__src), "+d" (__src_len)
278 : "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
281 return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
285 * crypt_s390_func_available:
286 * @func: the function code of the specific function; 0 if op in general
288 * Tests if a specific crypto function is implemented on the machine.
290 * Returns 1 if func available; 0 if func or op in general not available
292 static inline int crypt_s390_func_available(int func)
294 unsigned char status[16];
297 switch (func & CRYPT_S390_OP_MASK) {
299 ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
302 ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
304 case CRYPT_S390_KIMD:
305 ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
307 case CRYPT_S390_KLMD:
308 ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
310 case CRYPT_S390_KMAC:
311 ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
318 func &= CRYPT_S390_FUNC_MASK;
319 func &= 0x7f; /* mask modifier bit */
320 return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
323 #endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */