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/*
* CP Assist for Cryptographic Functions (CPACF)
*
* Copyright IBM Corp. 2003, 2016
* Author(s): Thomas Spatzier
* Jan Glauber
* Harald Freudenberger (freude@de.ibm.com)
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _ASM_S390_CPACF_H
#define _ASM_S390_CPACF_H
#include <asm/facility.h>
/*
* Instruction opcodes for the CPACF instructions
*/
#define CPACF_KMAC 0xb91e /* MSA */
#define CPACF_KM 0xb92e /* MSA */
#define CPACF_KMC 0xb92f /* MSA */
#define CPACF_KIMD 0xb93e /* MSA */
#define CPACF_KLMD 0xb93f /* MSA */
#define CPACF_PCKMO 0xb928 /* MSA3 */
#define CPACF_KMF 0xb92a /* MSA4 */
#define CPACF_KMO 0xb92b /* MSA4 */
#define CPACF_PCC 0xb92c /* MSA4 */
#define CPACF_KMCTR 0xb92d /* MSA4 */
#define CPACF_PPNO 0xb93c /* MSA5 */
/*
* Decryption modifier bit
*/
#define CPACF_DECRYPT 0x80
/*
* Function codes for the KM (CIPHER MESSAGE) instruction
*/
#define CPACF_KM_QUERY 0x00
#define CPACF_KM_DEA 0x01
#define CPACF_KM_TDEA_128 0x02
#define CPACF_KM_TDEA_192 0x03
#define CPACF_KM_AES_128 0x12
#define CPACF_KM_AES_192 0x13
#define CPACF_KM_AES_256 0x14
#define CPACF_KM_XTS_128 0x32
#define CPACF_KM_XTS_256 0x34
/*
* Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
* instruction
*/
#define CPACF_KMC_QUERY 0x00
#define CPACF_KMC_DEA 0x01
#define CPACF_KMC_TDEA_128 0x02
#define CPACF_KMC_TDEA_192 0x03
#define CPACF_KMC_AES_128 0x12
#define CPACF_KMC_AES_192 0x13
#define CPACF_KMC_AES_256 0x14
#define CPACF_KMC_PRNG 0x43
/*
* Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
* instruction
*/
#define CPACF_KMCTR_QUERY 0x00
#define CPACF_KMCTR_DEA 0x01
#define CPACF_KMCTR_TDEA_128 0x02
#define CPACF_KMCTR_TDEA_192 0x03
#define CPACF_KMCTR_AES_128 0x12
#define CPACF_KMCTR_AES_192 0x13
#define CPACF_KMCTR_AES_256 0x14
/*
* Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
* instruction
*/
#define CPACF_KIMD_QUERY 0x00
#define CPACF_KIMD_SHA_1 0x01
#define CPACF_KIMD_SHA_256 0x02
#define CPACF_KIMD_SHA_512 0x03
#define CPACF_KIMD_GHASH 0x41
/*
* Function codes for the KLMD (COMPUTE LAST MESSAGE DIGEST)
* instruction
*/
#define CPACF_KLMD_QUERY 0x00
#define CPACF_KLMD_SHA_1 0x01
#define CPACF_KLMD_SHA_256 0x02
#define CPACF_KLMD_SHA_512 0x03
/*
* function codes for the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
* instruction
*/
#define CPACF_KMAC_QUERY 0x00
#define CPACF_KMAC_DEA 0x01
#define CPACF_KMAC_TDEA_128 0x02
#define CPACF_KMAC_TDEA_192 0x03
/*
* Function codes for the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
* instruction
*/
#define CPACF_PPNO_QUERY 0x00
#define CPACF_PPNO_SHA512_DRNG_GEN 0x03
#define CPACF_PPNO_SHA512_DRNG_SEED 0x83
typedef struct { unsigned char bytes[16]; } cpacf_mask_t;
/**
* cpacf_query() - check if a specific CPACF function is available
* @opcode: the opcode of the crypto instruction
* @func: the function code to test for
*
* Executes the query function for the given crypto instruction @opcode
* and checks if @func is available
*
* Returns 1 if @func is available for @opcode, 0 otherwise
*/
static inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
{
register unsigned long r0 asm("0") = 0; /* query function */
register unsigned long r1 asm("1") = (unsigned long) mask;
asm volatile(
" spm 0\n" /* pckmo doesn't change the cc */
/* Parameter registers are ignored, but may not be 0 */
"0: .insn rrf,%[opc] << 16,2,2,2,0\n"
" brc 1,0b\n" /* handle partial completion */
: "=m" (*mask)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
: "cc");
}
static inline int __cpacf_check_opcode(unsigned int opcode)
{
switch (opcode) {
case CPACF_KMAC:
case CPACF_KM:
case CPACF_KMC:
case CPACF_KIMD:
case CPACF_KLMD:
return test_facility(17); /* check for MSA */
case CPACF_PCKMO:
return test_facility(76); /* check for MSA3 */
case CPACF_KMF:
case CPACF_KMO:
case CPACF_PCC:
case CPACF_KMCTR:
return test_facility(77); /* check for MSA4 */
case CPACF_PPNO:
return test_facility(57); /* check for MSA5 */
default:
BUG();
}
}
static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
{
if (__cpacf_check_opcode(opcode)) {
__cpacf_query(opcode, mask);
return 1;
}
memset(mask, 0, sizeof(*mask));
return 0;
}
static inline int cpacf_test_func(cpacf_mask_t *mask, unsigned int func)
{
return (mask->bytes[func >> 3] & (0x80 >> (func & 7))) != 0;
}
static inline int cpacf_query_func(unsigned int opcode, unsigned int func)
{
cpacf_mask_t mask;
if (cpacf_query(opcode, &mask))
return cpacf_test_func(&mask, func);
return 0;
}
/**
* cpacf_km() - executes the KM (CIPHER MESSAGE) instruction
* @func: the function code passed to KM; see CPACF_KM_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
*
* Returns 0 for the query func, number of processed bytes for
* encryption/decryption funcs
*/
static inline int cpacf_km(unsigned long func, void *param,
u8 *dest, const u8 *src, long src_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) dest;
asm volatile(
"0: .insn rre,%[opc] << 16,%[dst],%[src]\n"
" brc 1,0b\n" /* handle partial completion */
: [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KM)
: "cc", "memory");
return src_len - r3;
}
/**
* cpacf_kmc() - executes the KMC (CIPHER MESSAGE WITH CHAINING) instruction
* @func: the function code passed to KM; see CPACF_KMC_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
*
* Returns 0 for the query func, number of processed bytes for
* encryption/decryption funcs
*/
static inline int cpacf_kmc(unsigned long func, void *param,
u8 *dest, const u8 *src, long src_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) dest;
asm volatile(
"0: .insn rre,%[opc] << 16,%[dst],%[src]\n"
" brc 1,0b\n" /* handle partial completion */
: [src] "+a" (r2), [len] "+d" (r3), [dst] "+a" (r4)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMC)
: "cc", "memory");
return src_len - r3;
}
/**
* cpacf_kimd() - executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
* instruction
* @func: the function code passed to KM; see CPACF_KIMD_xxx defines
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*/
static inline void cpacf_kimd(unsigned long func, void *param,
const u8 *src, long src_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;
asm volatile(
"0: .insn rre,%[opc] << 16,0,%[src]\n"
" brc 1,0b\n" /* handle partial completion */
: [src] "+a" (r2), [len] "+d" (r3)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KIMD)
: "cc", "memory");
}
/**
* cpacf_klmd() - executes the KLMD (COMPUTE LAST MESSAGE DIGEST) instruction
* @func: the function code passed to KM; see CPACF_KLMD_xxx defines
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*/
static inline void cpacf_klmd(unsigned long func, void *param,
const u8 *src, long src_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;
asm volatile(
"0: .insn rre,%[opc] << 16,0,%[src]\n"
" brc 1,0b\n" /* handle partial completion */
: [src] "+a" (r2), [len] "+d" (r3)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KLMD)
: "cc", "memory");
}
/**
* cpacf_kmac() - executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
* instruction
* @func: the function code passed to KM; see CPACF_KMAC_xxx defines
* @param: address of parameter block; see POP for details on each func
* @src: address of source memory area
* @src_len: length of src operand in bytes
*
* Returns 0 for the query func, number of processed bytes for digest funcs
*/
static inline int cpacf_kmac(unsigned long func, void *param,
const u8 *src, long src_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;
asm volatile(
"0: .insn rre,%[opc] << 16,0,%[src]\n"
" brc 1,0b\n" /* handle partial completion */
: [src] "+a" (r2), [len] "+d" (r3)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMAC)
: "cc", "memory");
return src_len - r3;
}
/**
* cpacf_kmctr() - executes the KMCTR (CIPHER MESSAGE WITH COUNTER) instruction
* @func: the function code passed to KMCTR; see CPACF_KMCTR_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
* @counter: address of counter value
*
* Returns 0 for the query func, number of processed bytes for
* encryption/decryption funcs
*/
static inline int cpacf_kmctr(unsigned long func, void *param, u8 *dest,
const u8 *src, long src_len, u8 *counter)
{
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) dest;
register unsigned long r6 asm("6") = (unsigned long) counter;
asm volatile(
"0: .insn rrf,%[opc] << 16,%[dst],%[src],%[ctr],0\n"
" brc 1,0b\n" /* handle partial completion */
: [src] "+a" (r2), [len] "+d" (r3),
[dst] "+a" (r4), [ctr] "+a" (r6)
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMCTR)
: "cc", "memory");
return src_len - r3;
}
/**
* cpacf_ppno() - executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
* instruction
* @func: the function code passed to PPNO; see CPACF_PPNO_xxx defines
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @dest_len: size of destination memory area in bytes
* @seed: address of seed data
* @seed_len: size of seed data in bytes
*/
static inline void cpacf_ppno(unsigned long func, void *param,
u8 *dest, long dest_len,
const u8 *seed, long seed_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) dest;
register unsigned long r3 asm("3") = (unsigned long) dest_len;
register unsigned long r4 asm("4") = (unsigned long) seed;
register unsigned long r5 asm("5") = (unsigned long) seed_len;
asm volatile (
"0: .insn rre,%[opc] << 16,%[dst],%[seed]\n"
" brc 1,0b\n" /* handle partial completion */
: [dst] "+a" (r2), [dlen] "+d" (r3)
: [fc] "d" (r0), [pba] "a" (r1),
[seed] "a" (r4), [slen] "d" (r5), [opc] "i" (CPACF_PPNO)
: "cc", "memory");
}
/**
* cpacf_pcc() - executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION)
* instruction
* @func: the function code passed to PCC; see CPACF_KM_xxx defines
* @param: address of parameter block; see POP for details on each func
*/
static inline void cpacf_pcc(unsigned long func, void *param)
{
register unsigned long r0 asm("0") = (unsigned long) func;
register unsigned long r1 asm("1") = (unsigned long) param;
asm volatile(
"0: .insn rre,%[opc] << 16,0,0\n" /* PCC opcode */
" brc 1,0b\n" /* handle partial completion */
:
: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCC)
: "cc", "memory");
}
#endif /* _ASM_S390_CPACF_H */
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