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s390/crypto: add inline assembly for KMA instruction to cpacf.h

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Signed-off-by: Patrick Steuer <patrick.steuer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Patrick Steuer 2017-09-18 12:48:08 +02:00 committed by Martin Schwidefsky
parent eb3b7b848f
commit eecd49c462
1 changed files with 51 additions and 1 deletions
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52
arch/s390/include/asm/cpacf.h
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@ -1,7 +1,7 @@
/*
* CP Assist for Cryptographic Functions (CPACF)
*
* Copyright IBM Corp. 2003, 2016
* Copyright IBM Corp. 2003, 2017
* Author(s): Thomas Spatzier
* Jan Glauber
* Harald Freudenberger (freude@de.ibm.com)
@ -133,6 +133,22 @@
#define CPACF_PRNO_TRNG_Q_R2C_RATIO 0x70
#define CPACF_PRNO_TRNG 0x72
/*
* Function codes for the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
* instruction
*/
#define CPACF_KMA_QUERY 0x00
#define CPACF_KMA_GCM_AES_128 0x12
#define CPACF_KMA_GCM_AES_192 0x13
#define CPACF_KMA_GCM_AES_256 0x14
/*
* Flags for the KMA (CIPHER MESSAGE WITH AUTHENTICATION) instruction
*/
#define CPACF_KMA_LPC 0x100 /* Last-Plaintext/Ciphertext */
#define CPACF_KMA_LAAD 0x200 /* Last-AAD */
#define CPACF_KMA_HS 0x400 /* Hash-subkey Supplied */
typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
/**
@ -178,6 +194,8 @@ static inline int __cpacf_check_opcode(unsigned int opcode)
return test_facility(77); /* check for MSA4 */
case CPACF_PRNO:
return test_facility(57); /* check for MSA5 */
case CPACF_KMA:
return test_facility(146); /* check for MSA8 */
default:
BUG();
}
@ -469,4 +487,36 @@ static inline void cpacf_pckmo(long func, void *param)
: "cc", "memory");
}
/**
* cpacf_kma() - executes the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
* instruction
* @func: the function code passed to KMA; see CPACF_KMA_xxx defines
* @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
* @aad: address of additional authenticated data memory area
* @aad_len: length of aad operand in bytes
*/
static inline void cpacf_kma(unsigned long func, void *param, u8 *dest,
const u8 *src, unsigned long src_len,
const u8 *aad, unsigned long aad_len)
{
register unsigned long r0 asm("0") = (unsigned long) func;
register unsigned long r1 asm("1") = (unsigned long) param;
register unsigned long r2 asm("2") = (unsigned long) src;
register unsigned long r3 asm("3") = (unsigned long) src_len;
register unsigned long r4 asm("4") = (unsigned long) aad;
register unsigned long r5 asm("5") = (unsigned long) aad_len;
register unsigned long r6 asm("6") = (unsigned long) dest;
asm volatile(
"0: .insn rrf,%[opc] << 16,%[dst],%[src],%[aad],0\n"
" brc 1,0b\n" /* handle partial completion */
: [dst] "+a" (r6), [src] "+a" (r2), [slen] "+d" (r3),
[aad] "+a" (r4), [alen] "+d" (r5)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMA)
: "cc", "memory");
}
#endif /* _ASM_S390_CPACF_H */