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b84d0c417a
Using register asm statements has been proven to be very error prone, especially when using code instrumentation where gcc may add function calls, which clobbers register contents in an unexpected way. Therefore get rid of register asm statements in cpacf code, and make sure this bug class cannot happen. Reviewed-by: Patrick Steuer <patrick.steuer@de.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
547 lines
16 KiB
C
547 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* CP Assist for Cryptographic Functions (CPACF)
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*
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* Copyright IBM Corp. 2003, 2017
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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_PRNO 0xb93c /* MSA5 */
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#define CPACF_KMA 0xb929 /* MSA8 */
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#define CPACF_KDSA 0xb93a /* MSA9 */
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/*
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* En/decryption modifier bits
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*/
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#define CPACF_ENCRYPT 0x00
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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_PAES_128 0x1a
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#define CPACF_KM_PAES_192 0x1b
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#define CPACF_KM_PAES_256 0x1c
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#define CPACF_KM_XTS_128 0x32
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#define CPACF_KM_XTS_256 0x34
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#define CPACF_KM_PXTS_128 0x3a
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#define CPACF_KM_PXTS_256 0x3c
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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_PAES_128 0x1a
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#define CPACF_KMC_PAES_192 0x1b
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#define CPACF_KMC_PAES_256 0x1c
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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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#define CPACF_KMCTR_PAES_128 0x1a
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#define CPACF_KMCTR_PAES_192 0x1b
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#define CPACF_KMCTR_PAES_256 0x1c
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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_SHA3_224 0x20
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#define CPACF_KIMD_SHA3_256 0x21
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#define CPACF_KIMD_SHA3_384 0x22
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#define CPACF_KIMD_SHA3_512 0x23
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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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#define CPACF_KLMD_SHA3_224 0x20
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#define CPACF_KLMD_SHA3_256 0x21
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#define CPACF_KLMD_SHA3_384 0x22
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#define CPACF_KLMD_SHA3_512 0x23
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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 PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
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* instruction
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*/
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#define CPACF_PCKMO_QUERY 0x00
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#define CPACF_PCKMO_ENC_DES_KEY 0x01
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#define CPACF_PCKMO_ENC_TDES_128_KEY 0x02
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#define CPACF_PCKMO_ENC_TDES_192_KEY 0x03
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#define CPACF_PCKMO_ENC_AES_128_KEY 0x12
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#define CPACF_PCKMO_ENC_AES_192_KEY 0x13
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#define CPACF_PCKMO_ENC_AES_256_KEY 0x14
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/*
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* Function codes for the PRNO (PERFORM RANDOM NUMBER OPERATION)
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* instruction
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*/
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#define CPACF_PRNO_QUERY 0x00
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#define CPACF_PRNO_SHA512_DRNG_GEN 0x03
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#define CPACF_PRNO_SHA512_DRNG_SEED 0x83
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#define CPACF_PRNO_TRNG_Q_R2C_RATIO 0x70
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#define CPACF_PRNO_TRNG 0x72
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/*
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* Function codes for the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
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* instruction
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*/
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#define CPACF_KMA_QUERY 0x00
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#define CPACF_KMA_GCM_AES_128 0x12
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#define CPACF_KMA_GCM_AES_192 0x13
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#define CPACF_KMA_GCM_AES_256 0x14
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/*
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* Flags for the KMA (CIPHER MESSAGE WITH AUTHENTICATION) instruction
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*/
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#define CPACF_KMA_LPC 0x100 /* Last-Plaintext/Ciphertext */
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#define CPACF_KMA_LAAD 0x200 /* Last-AAD */
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#define CPACF_KMA_HS 0x400 /* Hash-subkey Supplied */
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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 __always_inline void __cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
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{
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asm volatile(
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" lghi 0,0\n" /* query function */
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" lgr 1,%[mask]\n"
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" spm 0\n" /* pckmo doesn't change the cc */
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/* Parameter regs are ignored, but must be nonzero and unique */
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"0: .insn rrf,%[opc] << 16,2,4,6,0\n"
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" brc 1,0b\n" /* handle partial completion */
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: "=m" (*mask)
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: [mask] "d" ((unsigned long)mask), [opc] "i" (opcode)
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: "cc", "0", "1");
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}
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static __always_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_PRNO:
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return test_facility(57); /* check for MSA5 */
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case CPACF_KMA:
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return test_facility(146); /* check for MSA8 */
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default:
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BUG();
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}
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}
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static __always_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 __always_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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union register_pair d, s;
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d.even = (unsigned long)dest;
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s.even = (unsigned long)src;
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s.odd = (unsigned long)src_len;
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asm volatile(
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" lgr 0,%[fc]\n"
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" lgr 1,%[pba]\n"
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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] "+&d" (s.pair), [dst] "+&d" (d.pair)
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: [fc] "d" (func), [pba] "d" ((unsigned long)param),
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[opc] "i" (CPACF_KM)
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: "cc", "memory", "0", "1");
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return src_len - s.odd;
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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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union register_pair d, s;
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d.even = (unsigned long)dest;
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s.even = (unsigned long)src;
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s.odd = (unsigned long)src_len;
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asm volatile(
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" lgr 0,%[fc]\n"
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" lgr 1,%[pba]\n"
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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] "+&d" (s.pair), [dst] "+&d" (d.pair)
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: [fc] "d" (func), [pba] "d" ((unsigned long)param),
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[opc] "i" (CPACF_KMC)
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: "cc", "memory", "0", "1");
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return src_len - s.odd;
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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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union register_pair s;
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s.even = (unsigned long)src;
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s.odd = (unsigned long)src_len;
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asm volatile(
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" lgr 0,%[fc]\n"
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" lgr 1,%[pba]\n"
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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] "+&d" (s.pair)
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: [fc] "d" (func), [pba] "d" ((unsigned long)(param)),
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[opc] "i" (CPACF_KIMD)
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: "cc", "memory", "0", "1");
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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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union register_pair s;
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s.even = (unsigned long)src;
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s.odd = (unsigned long)src_len;
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asm volatile(
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" lgr 0,%[fc]\n"
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" lgr 1,%[pba]\n"
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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] "+&d" (s.pair)
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: [fc] "d" (func), [pba] "d" ((unsigned long)param),
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[opc] "i" (CPACF_KLMD)
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: "cc", "memory", "0", "1");
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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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union register_pair s;
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s.even = (unsigned long)src;
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s.odd = (unsigned long)src_len;
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asm volatile(
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" lgr 0,%[fc]\n"
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" lgr 1,%[pba]\n"
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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] "+&d" (s.pair)
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: [fc] "d" (func), [pba] "d" ((unsigned long)param),
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[opc] "i" (CPACF_KMAC)
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: "cc", "memory", "0", "1");
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return src_len - s.odd;
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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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union register_pair d, s, c;
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d.even = (unsigned long)dest;
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s.even = (unsigned long)src;
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s.odd = (unsigned long)src_len;
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c.even = (unsigned long)counter;
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asm volatile(
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" lgr 0,%[fc]\n"
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" lgr 1,%[pba]\n"
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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] "+&d" (s.pair), [dst] "+&d" (d.pair),
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[ctr] "+&d" (c.pair)
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: [fc] "d" (func), [pba] "d" ((unsigned long)param),
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[opc] "i" (CPACF_KMCTR)
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: "cc", "memory", "0", "1");
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return src_len - s.odd;
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}
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/**
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* cpacf_prno() - executes the PRNO (PERFORM RANDOM NUMBER OPERATION)
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* instruction
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* @func: the function code passed to PRNO; see CPACF_PRNO_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_prno(unsigned long func, void *param,
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u8 *dest, unsigned long dest_len,
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const u8 *seed, unsigned long seed_len)
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{
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union register_pair d, s;
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d.even = (unsigned long)dest;
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d.odd = (unsigned long)dest_len;
|
|
s.even = (unsigned long)seed;
|
|
s.odd = (unsigned long)seed_len;
|
|
asm volatile (
|
|
" lgr 0,%[fc]\n"
|
|
" lgr 1,%[pba]\n"
|
|
"0: .insn rre,%[opc] << 16,%[dst],%[seed]\n"
|
|
" brc 1,0b\n" /* handle partial completion */
|
|
: [dst] "+&d" (d.pair)
|
|
: [fc] "d" (func), [pba] "d" ((unsigned long)param),
|
|
[seed] "d" (s.pair), [opc] "i" (CPACF_PRNO)
|
|
: "cc", "memory", "0", "1");
|
|
}
|
|
|
|
/**
|
|
* cpacf_trng() - executes the TRNG subfunction of the PRNO instruction
|
|
* @ucbuf: buffer for unconditioned data
|
|
* @ucbuf_len: amount of unconditioned data to fetch in bytes
|
|
* @cbuf: buffer for conditioned data
|
|
* @cbuf_len: amount of conditioned data to fetch in bytes
|
|
*/
|
|
static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len,
|
|
u8 *cbuf, unsigned long cbuf_len)
|
|
{
|
|
union register_pair u, c;
|
|
|
|
u.even = (unsigned long)ucbuf;
|
|
u.odd = (unsigned long)ucbuf_len;
|
|
c.even = (unsigned long)cbuf;
|
|
c.odd = (unsigned long)cbuf_len;
|
|
asm volatile (
|
|
" lghi 0,%[fc]\n"
|
|
"0: .insn rre,%[opc] << 16,%[ucbuf],%[cbuf]\n"
|
|
" brc 1,0b\n" /* handle partial completion */
|
|
: [ucbuf] "+&d" (u.pair), [cbuf] "+&d" (c.pair)
|
|
: [fc] "K" (CPACF_PRNO_TRNG), [opc] "i" (CPACF_PRNO)
|
|
: "cc", "memory", "0");
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
asm volatile(
|
|
" lgr 0,%[fc]\n"
|
|
" lgr 1,%[pba]\n"
|
|
"0: .insn rre,%[opc] << 16,0,0\n" /* PCC opcode */
|
|
" brc 1,0b\n" /* handle partial completion */
|
|
:
|
|
: [fc] "d" (func), [pba] "d" ((unsigned long)param),
|
|
[opc] "i" (CPACF_PCC)
|
|
: "cc", "memory", "0", "1");
|
|
}
|
|
|
|
/**
|
|
* cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
|
|
* MANAGEMENT) instruction
|
|
* @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
|
|
* @param: address of parameter block; see POP for details on each func
|
|
*
|
|
* Returns 0.
|
|
*/
|
|
static inline void cpacf_pckmo(long func, void *param)
|
|
{
|
|
asm volatile(
|
|
" lgr 0,%[fc]\n"
|
|
" lgr 1,%[pba]\n"
|
|
" .insn rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
|
|
:
|
|
: [fc] "d" (func), [pba] "d" ((unsigned long)param),
|
|
[opc] "i" (CPACF_PCKMO)
|
|
: "cc", "memory", "0", "1");
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
union register_pair d, s, a;
|
|
|
|
d.even = (unsigned long)dest;
|
|
s.even = (unsigned long)src;
|
|
s.odd = (unsigned long)src_len;
|
|
a.even = (unsigned long)aad;
|
|
a.odd = (unsigned long)aad_len;
|
|
asm volatile(
|
|
" lgr 0,%[fc]\n"
|
|
" lgr 1,%[pba]\n"
|
|
"0: .insn rrf,%[opc] << 16,%[dst],%[src],%[aad],0\n"
|
|
" brc 1,0b\n" /* handle partial completion */
|
|
: [dst] "+&d" (d.pair), [src] "+&d" (s.pair),
|
|
[aad] "+&d" (a.pair)
|
|
: [fc] "d" (func), [pba] "d" ((unsigned long)param),
|
|
[opc] "i" (CPACF_KMA)
|
|
: "cc", "memory", "0", "1");
|
|
}
|
|
|
|
#endif /* _ASM_S390_CPACF_H */
|