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TOMOYO Linux Cross Reference
Linux/arch/s390/include/asm/cpacf.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * CP Assist for Cryptographic Functions (CPACF)
  4  *
  5  * Copyright IBM Corp. 2003, 2017
  6  * Author(s): Thomas Spatzier
  7  *            Jan Glauber
  8  *            Harald Freudenberger (freude@de.ibm.com)
  9  *            Martin Schwidefsky <schwidefsky@de.ibm.com>
 10  */
 11 #ifndef _ASM_S390_CPACF_H
 12 #define _ASM_S390_CPACF_H
 13 
 14 #include <asm/facility.h>
 15 
 16 /*
 17  * Instruction opcodes for the CPACF instructions
 18  */
 19 #define CPACF_KMAC              0xb91e          /* MSA  */
 20 #define CPACF_KM                0xb92e          /* MSA  */
 21 #define CPACF_KMC               0xb92f          /* MSA  */
 22 #define CPACF_KIMD              0xb93e          /* MSA  */
 23 #define CPACF_KLMD              0xb93f          /* MSA  */
 24 #define CPACF_PCKMO             0xb928          /* MSA3 */
 25 #define CPACF_KMF               0xb92a          /* MSA4 */
 26 #define CPACF_KMO               0xb92b          /* MSA4 */
 27 #define CPACF_PCC               0xb92c          /* MSA4 */
 28 #define CPACF_KMCTR             0xb92d          /* MSA4 */
 29 #define CPACF_PRNO              0xb93c          /* MSA5 */
 30 #define CPACF_KMA               0xb929          /* MSA8 */
 31 
 32 /*
 33  * En/decryption modifier bits
 34  */
 35 #define CPACF_ENCRYPT           0x00
 36 #define CPACF_DECRYPT           0x80
 37 
 38 /*
 39  * Function codes for the KM (CIPHER MESSAGE) instruction
 40  */
 41 #define CPACF_KM_QUERY          0x00
 42 #define CPACF_KM_DEA            0x01
 43 #define CPACF_KM_TDEA_128       0x02
 44 #define CPACF_KM_TDEA_192       0x03
 45 #define CPACF_KM_AES_128        0x12
 46 #define CPACF_KM_AES_192        0x13
 47 #define CPACF_KM_AES_256        0x14
 48 #define CPACF_KM_PAES_128       0x1a
 49 #define CPACF_KM_PAES_192       0x1b
 50 #define CPACF_KM_PAES_256       0x1c
 51 #define CPACF_KM_XTS_128        0x32
 52 #define CPACF_KM_XTS_256        0x34
 53 #define CPACF_KM_PXTS_128       0x3a
 54 #define CPACF_KM_PXTS_256       0x3c
 55 
 56 /*
 57  * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
 58  * instruction
 59  */
 60 #define CPACF_KMC_QUERY         0x00
 61 #define CPACF_KMC_DEA           0x01
 62 #define CPACF_KMC_TDEA_128      0x02
 63 #define CPACF_KMC_TDEA_192      0x03
 64 #define CPACF_KMC_AES_128       0x12
 65 #define CPACF_KMC_AES_192       0x13
 66 #define CPACF_KMC_AES_256       0x14
 67 #define CPACF_KMC_PAES_128      0x1a
 68 #define CPACF_KMC_PAES_192      0x1b
 69 #define CPACF_KMC_PAES_256      0x1c
 70 #define CPACF_KMC_PRNG          0x43
 71 
 72 /*
 73  * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
 74  * instruction
 75  */
 76 #define CPACF_KMCTR_QUERY       0x00
 77 #define CPACF_KMCTR_DEA         0x01
 78 #define CPACF_KMCTR_TDEA_128    0x02
 79 #define CPACF_KMCTR_TDEA_192    0x03
 80 #define CPACF_KMCTR_AES_128     0x12
 81 #define CPACF_KMCTR_AES_192     0x13
 82 #define CPACF_KMCTR_AES_256     0x14
 83 #define CPACF_KMCTR_PAES_128    0x1a
 84 #define CPACF_KMCTR_PAES_192    0x1b
 85 #define CPACF_KMCTR_PAES_256    0x1c
 86 
 87 /*
 88  * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
 89  * instruction
 90  */
 91 #define CPACF_KIMD_QUERY        0x00
 92 #define CPACF_KIMD_SHA_1        0x01
 93 #define CPACF_KIMD_SHA_256      0x02
 94 #define CPACF_KIMD_SHA_512      0x03
 95 #define CPACF_KIMD_GHASH        0x41
 96 
 97 /*
 98  * Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
 99  * instruction
100  */
101 #define CPACF_KLMD_QUERY        0x00
102 #define CPACF_KLMD_SHA_1        0x01
103 #define CPACF_KLMD_SHA_256      0x02
104 #define CPACF_KLMD_SHA_512      0x03
105 
106 /*
107  * function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
108  * instruction
109  */
110 #define CPACF_KMAC_QUERY        0x00
111 #define CPACF_KMAC_DEA          0x01
112 #define CPACF_KMAC_TDEA_128     0x02
113 #define CPACF_KMAC_TDEA_192     0x03
114 
115 /*
116  * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
117  * instruction
118  */
119 #define CPACF_PCKMO_QUERY               0x00
120 #define CPACF_PCKMO_ENC_DES_KEY         0x01
121 #define CPACF_PCKMO_ENC_TDES_128_KEY    0x02
122 #define CPACF_PCKMO_ENC_TDES_192_KEY    0x03
123 #define CPACF_PCKMO_ENC_AES_128_KEY     0x12
124 #define CPACF_PCKMO_ENC_AES_192_KEY     0x13
125 #define CPACF_PCKMO_ENC_AES_256_KEY     0x14
126 
127 /*
128  * Function codes for the PRNO (PERFORM RANDOM NUMBER OPERATION)
129  * instruction
130  */
131 #define CPACF_PRNO_QUERY                0x00
132 #define CPACF_PRNO_SHA512_DRNG_GEN      0x03
133 #define CPACF_PRNO_SHA512_DRNG_SEED     0x83
134 #define CPACF_PRNO_TRNG_Q_R2C_RATIO     0x70
135 #define CPACF_PRNO_TRNG                 0x72
136 
137 /*
138  * Function codes for the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
139  * instruction
140  */
141 #define CPACF_KMA_QUERY         0x00
142 #define CPACF_KMA_GCM_AES_128   0x12
143 #define CPACF_KMA_GCM_AES_192   0x13
144 #define CPACF_KMA_GCM_AES_256   0x14
145 
146 /*
147  * Flags for the KMA (CIPHER MESSAGE WITH AUTHENTICATION) instruction
148  */
149 #define CPACF_KMA_LPC   0x100   /* Last-Plaintext/Ciphertext */
150 #define CPACF_KMA_LAAD  0x200   /* Last-AAD */
151 #define CPACF_KMA_HS    0x400   /* Hash-subkey Supplied */
152 
153 typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
154 
155 /**
156  * cpacf_query() - check if a specific CPACF function is available
157  * @opcode: the opcode of the crypto instruction
158  * @func: the function code to test for
159  *
160  * Executes the query function for the given crypto instruction @opcode
161  * and checks if @func is available
162  *
163  * Returns 1 if @func is available for @opcode, 0 otherwise
164  */
165 static inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
166 {
167         register unsigned long r0 asm("") = 0; /* query function */
168         register unsigned long r1 asm("1") = (unsigned long) mask;
169 
170         asm volatile(
171                 "       spm 0\n" /* pckmo doesn't change the cc */
172                 /* Parameter regs are ignored, but must be nonzero and unique */
173                 "0:     .insn   rrf,%[opc] << 16,2,4,6,0\n"
174                 "       brc     1,0b\n" /* handle partial completion */
175                 : "=m" (*mask)
176                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
177                 : "cc");
178 }
179 
180 static inline int __cpacf_check_opcode(unsigned int opcode)
181 {
182         switch (opcode) {
183         case CPACF_KMAC:
184         case CPACF_KM:
185         case CPACF_KMC:
186         case CPACF_KIMD:
187         case CPACF_KLMD:
188                 return test_facility(17);       /* check for MSA */
189         case CPACF_PCKMO:
190                 return test_facility(76);       /* check for MSA3 */
191         case CPACF_KMF:
192         case CPACF_KMO:
193         case CPACF_PCC:
194         case CPACF_KMCTR:
195                 return test_facility(77);       /* check for MSA4 */
196         case CPACF_PRNO:
197                 return test_facility(57);       /* check for MSA5 */
198         case CPACF_KMA:
199                 return test_facility(146);      /* check for MSA8 */
200         default:
201                 BUG();
202         }
203 }
204 
205 static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
206 {
207         if (__cpacf_check_opcode(opcode)) {
208                 __cpacf_query(opcode, mask);
209                 return 1;
210         }
211         memset(mask, 0, sizeof(*mask));
212         return 0;
213 }
214 
215 static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
216 {
217         return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
218 }
219 
220 static inline int cpacf_query_func(unsigned int opcode, unsigned int func)
221 {
222         cpacf_mask_t mask;
223 
224         if (cpacf_query(opcode, &mask))
225                 return cpacf_test_func(&mask, func);
226         return 0;
227 }
228 
229 /**
230  * cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
231  * @func: the function code passed to KM; see CPACF_KM_xxx defines
232  * @param: address of parameter block; see POP for details on each func
233  * @dest: address of destination memory area
234  * @src: address of source memory area
235  * @src_len: length of src operand in bytes
236  *
237  * Returns 0 for the query func, number of processed bytes for
238  * encryption/decryption funcs
239  */
240 static inline int cpacf_km(unsigned long func, void *param,
241                            u8 *dest, const u8 *src, long src_len)
242 {
243         register unsigned long r0 asm("") = (unsigned long) func;
244         register unsigned long r1 asm("1") = (unsigned long) param;
245         register unsigned long r2 asm("2") = (unsigned long) src;
246         register unsigned long r3 asm("3") = (unsigned long) src_len;
247         register unsigned long r4 asm("4") = (unsigned long) dest;
248 
249         asm volatile(
250                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
251                 "       brc     1,0b\n" /* handle partial completion */
252                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
253                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
254                 : "cc", "memory");
255 
256         return src_len - r3;
257 }
258 
259 /**
260  * cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
261  * @func: the function code passed to KM; see CPACF_KMC_xxx defines
262  * @param: address of parameter block; see POP for details on each func
263  * @dest: address of destination memory area
264  * @src: address of source memory area
265  * @src_len: length of src operand in bytes
266  *
267  * Returns 0 for the query func, number of processed bytes for
268  * encryption/decryption funcs
269  */
270 static inline int cpacf_kmc(unsigned long func, void *param,
271                             u8 *dest, const u8 *src, long src_len)
272 {
273         register unsigned long r0 asm("") = (unsigned long) func;
274         register unsigned long r1 asm("1") = (unsigned long) param;
275         register unsigned long r2 asm("2") = (unsigned long) src;
276         register unsigned long r3 asm("3") = (unsigned long) src_len;
277         register unsigned long r4 asm("4") = (unsigned long) dest;
278 
279         asm volatile(
280                 "0:     .insn   rre,%[opc] << 16,%[dst],%[src]\n"
281                 "       brc     1,0b\n" /* handle partial completion */
282                 : [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
283                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
284                 : "cc", "memory");
285 
286         return src_len - r3;
287 }
288 
289 /**
290  * cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
291  *                instruction
292  * @func: the function code passed to KM; see CPACF_KIMD_xxx defines
293  * @param: address of parameter block; see POP for details on each func
294  * @src: address of source memory area
295  * @src_len: length of src operand in bytes
296  */
297 static inline void cpacf_kimd(unsigned long func, void *param,
298                               const u8 *src, long src_len)
299 {
300         register unsigned long r0 asm("") = (unsigned long) func;
301         register unsigned long r1 asm("1") = (unsigned long) param;
302         register unsigned long r2 asm("2") = (unsigned long) src;
303         register unsigned long r3 asm("3") = (unsigned long) src_len;
304 
305         asm volatile(
306                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
307                 "       brc     1,0b\n" /* handle partial completion */
308                 : [src] "+a" (r2), [len] "+d" (r3)
309                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
310                 : "cc", "memory");
311 }
312 
313 /**
314  * cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
315  * @func: the function code passed to KM; see CPACF_KLMD_xxx defines
316  * @param: address of parameter block; see POP for details on each func
317  * @src: address of source memory area
318  * @src_len: length of src operand in bytes
319  */
320 static inline void cpacf_klmd(unsigned long func, void *param,
321                               const u8 *src, long src_len)
322 {
323         register unsigned long r0 asm("") = (unsigned long) func;
324         register unsigned long r1 asm("1") = (unsigned long) param;
325         register unsigned long r2 asm("2") = (unsigned long) src;
326         register unsigned long r3 asm("3") = (unsigned long) src_len;
327 
328         asm volatile(
329                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
330                 "       brc     1,0b\n" /* handle partial completion */
331                 : [src] "+a" (r2), [len] "+d" (r3)
332                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
333                 : "cc", "memory");
334 }
335 
336 /**
337  * cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
338  *                instruction
339  * @func: the function code passed to KM; see CPACF_KMAC_xxx defines
340  * @param: address of parameter block; see POP for details on each func
341  * @src: address of source memory area
342  * @src_len: length of src operand in bytes
343  *
344  * Returns 0 for the query func, number of processed bytes for digest funcs
345  */
346 static inline int cpacf_kmac(unsigned long func, void *param,
347                              const u8 *src, long src_len)
348 {
349         register unsigned long r0 asm("") = (unsigned long) func;
350         register unsigned long r1 asm("1") = (unsigned long) param;
351         register unsigned long r2 asm("2") = (unsigned long) src;
352         register unsigned long r3 asm("3") = (unsigned long) src_len;
353 
354         asm volatile(
355                 "0:     .insn   rre,%[opc] << 16,0,%[src]\n"
356                 "       brc     1,0b\n" /* handle partial completion */
357                 : [src] "+a" (r2), [len] "+d" (r3)
358                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
359                 : "cc", "memory");
360 
361         return src_len - r3;
362 }
363 
364 /**
365  * cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
366  * @func: the function code passed to KMCTR; see CPACF_KMCTR_xxx defines
367  * @param: address of parameter block; see POP for details on each func
368  * @dest: address of destination memory area
369  * @src: address of source memory area
370  * @src_len: length of src operand in bytes
371  * @counter: address of counter value
372  *
373  * Returns 0 for the query func, number of processed bytes for
374  * encryption/decryption funcs
375  */
376 static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
377                               const u8 *src, long src_len, u8 *counter)
378 {
379         register unsigned long r0 asm("") = (unsigned long) func;
380         register unsigned long r1 asm("1") = (unsigned long) param;
381         register unsigned long r2 asm("2") = (unsigned long) src;
382         register unsigned long r3 asm("3") = (unsigned long) src_len;
383         register unsigned long r4 asm("4") = (unsigned long) dest;
384         register unsigned long r6 asm("6") = (unsigned long) counter;
385 
386         asm volatile(
387                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
388                 "       brc     1,0b\n" /* handle partial completion */
389                 : [src] "+a" (r2), [len] "+d" (r3),
390                   [dst] "+a" (r4), [ctr] "+a" (r6)
391                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
392                 : "cc", "memory");
393 
394         return src_len - r3;
395 }
396 
397 /**
398  * cpacf_prno() - executes the PRNO (PERFORM RANDOM NUMBER OPERATION)
399  *                instruction
400  * @func: the function code passed to PRNO; see CPACF_PRNO_xxx defines
401  * @param: address of parameter block; see POP for details on each func
402  * @dest: address of destination memory area
403  * @dest_len: size of destination memory area in bytes
404  * @seed: address of seed data
405  * @seed_len: size of seed data in bytes
406  */
407 static inline void cpacf_prno(unsigned long func, void *param,
408                               u8 *dest, unsigned long dest_len,
409                               const u8 *seed, unsigned long seed_len)
410 {
411         register unsigned long r0 asm("") = (unsigned long) func;
412         register unsigned long r1 asm("1") = (unsigned long) param;
413         register unsigned long r2 asm("2") = (unsigned long) dest;
414         register unsigned long r3 asm("3") = (unsigned long) dest_len;
415         register unsigned long r4 asm("4") = (unsigned long) seed;
416         register unsigned long r5 asm("5") = (unsigned long) seed_len;
417 
418         asm volatile (
419                 "0:     .insn   rre,%[opc] << 16,%[dst],%[seed]\n"
420                 "       brc     1,0b\n"   /* handle partial completion */
421                 : [dst] "+a" (r2), [dlen] "+d" (r3)
422                 : [fc] "d" (r0), [pba] "a" (r1),
423                   [seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PRNO)
424                 : "cc", "memory");
425 }
426 
427 /**
428  * cpacf_trng() - executes the TRNG subfunction of the PRNO instruction
429  * @ucbuf: buffer for unconditioned data
430  * @ucbuf_len: amount of unconditioned data to fetch in bytes
431  * @cbuf: buffer for conditioned data
432  * @cbuf_len: amount of conditioned data to fetch in bytes
433  */
434 static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
435                               u8 *cbuf, unsigned long cbuf_len)
436 {
437         register unsigned long r0 asm("") = (unsigned long) CPACF_PRNO_TRNG;
438         register unsigned long r2 asm("2") = (unsigned long) ucbuf;
439         register unsigned long r3 asm("3") = (unsigned long) ucbuf_len;
440         register unsigned long r4 asm("4") = (unsigned long) cbuf;
441         register unsigned long r5 asm("5") = (unsigned long) cbuf_len;
442 
443         asm volatile (
444                 "0:     .insn   rre,%[opc] << 16,%[ucbuf],%[cbuf]\n"
445                 "       brc     1,0b\n"   /* handle partial completion */
446                 : [ucbuf] "+a" (r2), [ucbuflen] "+d" (r3),
447                   [cbuf] "+a" (r4), [cbuflen] "+d" (r5)
448                 : [fc] "d" (r0), [opc] "i" (CPACF_PRNO)
449                 : "cc", "memory");
450 }
451 
452 /**
453  * cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
454  *               instruction
455  * @func: the function code passed to PCC; see CPACF_KM_xxx defines
456  * @param: address of parameter block; see POP for details on each func
457  */
458 static inline void cpacf_pcc(unsigned long func, void *param)
459 {
460         register unsigned long r0 asm("") = (unsigned long) func;
461         register unsigned long r1 asm("1") = (unsigned long) param;
462 
463         asm volatile(
464                 "0:     .insn   rre,%[opc] << 16,0,0\n" /* PCC opcode */
465                 "       brc     1,0b\n" /* handle partial completion */
466                 :
467                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
468                 : "cc", "memory");
469 }
470 
471 /**
472  * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
473  *                MANAGEMENT) instruction
474  * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
475  * @param: address of parameter block; see POP for details on each func
476  *
477  * Returns 0.
478  */
479 static inline void cpacf_pckmo(long func, void *param)
480 {
481         register unsigned long r0 asm("") = (unsigned long) func;
482         register unsigned long r1 asm("1") = (unsigned long) param;
483 
484         asm volatile(
485                 "       .insn   rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
486                 :
487                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCKMO)
488                 : "cc", "memory");
489 }
490 
491 /**
492  * cpacf_kma() - executes the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
493  *               instruction
494  * @func: the function code passed to KMA; see CPACF_KMA_xxx defines
495  * @param: address of parameter block; see POP for details on each func
496  * @dest: address of destination memory area
497  * @src: address of source memory area
498  * @src_len: length of src operand in bytes
499  * @aad: address of additional authenticated data memory area
500  * @aad_len: length of aad operand in bytes
501  */
502 static inline void cpacf_kma(unsigned long func, void *param, u8 *dest,
503                              const u8 *src, unsigned long src_len,
504                              const u8 *aad, unsigned long aad_len)
505 {
506         register unsigned long r0 asm("") = (unsigned long) func;
507         register unsigned long r1 asm("1") = (unsigned long) param;
508         register unsigned long r2 asm("2") = (unsigned long) src;
509         register unsigned long r3 asm("3") = (unsigned long) src_len;
510         register unsigned long r4 asm("4") = (unsigned long) aad;
511         register unsigned long r5 asm("5") = (unsigned long) aad_len;
512         register unsigned long r6 asm("6") = (unsigned long) dest;
513 
514         asm volatile(
515                 "0:     .insn   rrf,%[opc] << 16,%[dst],%[src],%[aad],0\n"
516                 "       brc     1,0b\n" /* handle partial completion */
517                 : [dst] "+a" (r6), [src] "+a" (r2), [slen] "+d" (r3),
518                   [aad] "+a" (r4), [alen] "+d" (r5)
519                 : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMA)
520                 : "cc", "memory");
521 }
522 
523 #endif  /* _ASM_S390_CPACF_H */
524 

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