diff options
Diffstat (limited to 'arch/s390/include/asm/cpacf.h')
| -rw-r--r-- | arch/s390/include/asm/cpacf.h | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h index 056670ebba67..3cc52e37b4b2 100644 --- a/arch/s390/include/asm/cpacf.h +++ b/arch/s390/include/asm/cpacf.h @@ -2,7 +2,7 @@ /* * 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) @@ -134,6 +134,22 @@ #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; /** @@ -179,6 +195,8 @@ 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(); } @@ -470,4 +488,36 @@ 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 */ |