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