Initial import

1 files changed, 493 insertions, 0 deletions

diff --git a/arch/s390/crypto/crypt_s390.h b/arch/s390/crypto/crypt_s390.h
new file mode 100644
index 000000000..d9c4c313f
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+++ b/arch/s390/crypto/crypt_s390.h
@@ -0,0 +1,493 @@
+/*
+ * Cryptographic API.
+ *
+ * Support for s390 cryptographic instructions.
+ *
+ *   Copyright IBM Corp. 2003, 2015
+ *   Author(s): Thomas Spatzier
+ *		Jan Glauber (jan.glauber@de.ibm.com)
+ *		Harald Freudenberger (freude@de.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#ifndef _CRYPTO_ARCH_S390_CRYPT_S390_H
+#define _CRYPTO_ARCH_S390_CRYPT_S390_H
+
+#include <asm/errno.h>
+#include <asm/facility.h>
+
+#define CRYPT_S390_OP_MASK 0xFF00
+#define CRYPT_S390_FUNC_MASK 0x00FF
+
+#define CRYPT_S390_PRIORITY 300
+#define CRYPT_S390_COMPOSITE_PRIORITY 400
+
+#define CRYPT_S390_MSA	0x1
+#define CRYPT_S390_MSA3	0x2
+#define CRYPT_S390_MSA4	0x4
+#define CRYPT_S390_MSA5	0x8
+
+/* s390 cryptographic operations */
+enum crypt_s390_operations {
+	CRYPT_S390_KM	 = 0x0100,
+	CRYPT_S390_KMC	 = 0x0200,
+	CRYPT_S390_KIMD  = 0x0300,
+	CRYPT_S390_KLMD  = 0x0400,
+	CRYPT_S390_KMAC  = 0x0500,
+	CRYPT_S390_KMCTR = 0x0600,
+	CRYPT_S390_PPNO  = 0x0700
+};
+
+/*
+ * function codes for KM (CIPHER MESSAGE) instruction
+ * 0x80 is the decipher modifier bit
+ */
+enum crypt_s390_km_func {
+	KM_QUERY	    = CRYPT_S390_KM | 0x0,
+	KM_DEA_ENCRYPT      = CRYPT_S390_KM | 0x1,
+	KM_DEA_DECRYPT      = CRYPT_S390_KM | 0x1 | 0x80,
+	KM_TDEA_128_ENCRYPT = CRYPT_S390_KM | 0x2,
+	KM_TDEA_128_DECRYPT = CRYPT_S390_KM | 0x2 | 0x80,
+	KM_TDEA_192_ENCRYPT = CRYPT_S390_KM | 0x3,
+	KM_TDEA_192_DECRYPT = CRYPT_S390_KM | 0x3 | 0x80,
+	KM_AES_128_ENCRYPT  = CRYPT_S390_KM | 0x12,
+	KM_AES_128_DECRYPT  = CRYPT_S390_KM | 0x12 | 0x80,
+	KM_AES_192_ENCRYPT  = CRYPT_S390_KM | 0x13,
+	KM_AES_192_DECRYPT  = CRYPT_S390_KM | 0x13 | 0x80,
+	KM_AES_256_ENCRYPT  = CRYPT_S390_KM | 0x14,
+	KM_AES_256_DECRYPT  = CRYPT_S390_KM | 0x14 | 0x80,
+	KM_XTS_128_ENCRYPT  = CRYPT_S390_KM | 0x32,
+	KM_XTS_128_DECRYPT  = CRYPT_S390_KM | 0x32 | 0x80,
+	KM_XTS_256_ENCRYPT  = CRYPT_S390_KM | 0x34,
+	KM_XTS_256_DECRYPT  = CRYPT_S390_KM | 0x34 | 0x80,
+};
+
+/*
+ * function codes for KMC (CIPHER MESSAGE WITH CHAINING)
+ * instruction
+ */
+enum crypt_s390_kmc_func {
+	KMC_QUERY            = CRYPT_S390_KMC | 0x0,
+	KMC_DEA_ENCRYPT      = CRYPT_S390_KMC | 0x1,
+	KMC_DEA_DECRYPT      = CRYPT_S390_KMC | 0x1 | 0x80,
+	KMC_TDEA_128_ENCRYPT = CRYPT_S390_KMC | 0x2,
+	KMC_TDEA_128_DECRYPT = CRYPT_S390_KMC | 0x2 | 0x80,
+	KMC_TDEA_192_ENCRYPT = CRYPT_S390_KMC | 0x3,
+	KMC_TDEA_192_DECRYPT = CRYPT_S390_KMC | 0x3 | 0x80,
+	KMC_AES_128_ENCRYPT  = CRYPT_S390_KMC | 0x12,
+	KMC_AES_128_DECRYPT  = CRYPT_S390_KMC | 0x12 | 0x80,
+	KMC_AES_192_ENCRYPT  = CRYPT_S390_KMC | 0x13,
+	KMC_AES_192_DECRYPT  = CRYPT_S390_KMC | 0x13 | 0x80,
+	KMC_AES_256_ENCRYPT  = CRYPT_S390_KMC | 0x14,
+	KMC_AES_256_DECRYPT  = CRYPT_S390_KMC | 0x14 | 0x80,
+	KMC_PRNG	     = CRYPT_S390_KMC | 0x43,
+};
+
+/*
+ * function codes for KMCTR (CIPHER MESSAGE WITH COUNTER)
+ * instruction
+ */
+enum crypt_s390_kmctr_func {
+	KMCTR_QUERY            = CRYPT_S390_KMCTR | 0x0,
+	KMCTR_DEA_ENCRYPT      = CRYPT_S390_KMCTR | 0x1,
+	KMCTR_DEA_DECRYPT      = CRYPT_S390_KMCTR | 0x1 | 0x80,
+	KMCTR_TDEA_128_ENCRYPT = CRYPT_S390_KMCTR | 0x2,
+	KMCTR_TDEA_128_DECRYPT = CRYPT_S390_KMCTR | 0x2 | 0x80,
+	KMCTR_TDEA_192_ENCRYPT = CRYPT_S390_KMCTR | 0x3,
+	KMCTR_TDEA_192_DECRYPT = CRYPT_S390_KMCTR | 0x3 | 0x80,
+	KMCTR_AES_128_ENCRYPT  = CRYPT_S390_KMCTR | 0x12,
+	KMCTR_AES_128_DECRYPT  = CRYPT_S390_KMCTR | 0x12 | 0x80,
+	KMCTR_AES_192_ENCRYPT  = CRYPT_S390_KMCTR | 0x13,
+	KMCTR_AES_192_DECRYPT  = CRYPT_S390_KMCTR | 0x13 | 0x80,
+	KMCTR_AES_256_ENCRYPT  = CRYPT_S390_KMCTR | 0x14,
+	KMCTR_AES_256_DECRYPT  = CRYPT_S390_KMCTR | 0x14 | 0x80,
+};
+
+/*
+ * function codes for KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
+ * instruction
+ */
+enum crypt_s390_kimd_func {
+	KIMD_QUERY   = CRYPT_S390_KIMD | 0,
+	KIMD_SHA_1   = CRYPT_S390_KIMD | 1,
+	KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
+	KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
+	KIMD_GHASH   = CRYPT_S390_KIMD | 65,
+};
+
+/*
+ * function codes for KLMD (COMPUTE LAST MESSAGE DIGEST)
+ * instruction
+ */
+enum crypt_s390_klmd_func {
+	KLMD_QUERY   = CRYPT_S390_KLMD | 0,
+	KLMD_SHA_1   = CRYPT_S390_KLMD | 1,
+	KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
+	KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
+};
+
+/*
+ * function codes for KMAC (COMPUTE MESSAGE AUTHENTICATION CODE)
+ * instruction
+ */
+enum crypt_s390_kmac_func {
+	KMAC_QUERY    = CRYPT_S390_KMAC | 0,
+	KMAC_DEA      = CRYPT_S390_KMAC | 1,
+	KMAC_TDEA_128 = CRYPT_S390_KMAC | 2,
+	KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
+};
+
+/*
+ * function codes for PPNO (PERFORM PSEUDORANDOM NUMBER
+ * OPERATION) instruction
+ */
+enum crypt_s390_ppno_func {
+	PPNO_QUERY	      = CRYPT_S390_PPNO | 0,
+	PPNO_SHA512_DRNG_GEN  = CRYPT_S390_PPNO | 3,
+	PPNO_SHA512_DRNG_SEED = CRYPT_S390_PPNO | 0x83
+};
+
+/**
+ * crypt_s390_km:
+ * @func: the function code passed to KM; see crypt_s390_km_func
+ * @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
+ *
+ * Executes the KM (CIPHER MESSAGE) operation of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of processed
+ * bytes for encryption/decryption funcs
+ */
+static inline int crypt_s390_km(long func, void *param,
+				u8 *dest, const u8 *src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param asm("1") = param;
+	register const u8 *__src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	register u8 *__dest asm("4") = dest;
+	int ret;
+
+	asm volatile(
+		"0:	.insn	rre,0xb92e0000,%3,%1\n" /* KM opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
+		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
+}
+
+/**
+ * crypt_s390_kmc:
+ * @func: the function code passed to KM; see crypt_s390_kmc_func
+ * @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
+ *
+ * Executes the KMC (CIPHER MESSAGE WITH CHAINING) operation of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of processed
+ * bytes for encryption/decryption funcs
+ */
+static inline int crypt_s390_kmc(long func, void *param,
+				 u8 *dest, const u8 *src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param asm("1") = param;
+	register const u8 *__src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	register u8 *__dest asm("4") = dest;
+	int ret;
+
+	asm volatile(
+		"0:	.insn	rre,0xb92f0000,%3,%1\n" /* KMC opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
+		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
+}
+
+/**
+ * crypt_s390_kimd:
+ * @func: the function code passed to KM; see crypt_s390_kimd_func
+ * @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
+ *
+ * Executes the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST) operation
+ * of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of processed
+ * bytes for digest funcs
+ */
+static inline int crypt_s390_kimd(long func, void *param,
+				  const u8 *src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param asm("1") = param;
+	register const u8 *__src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	asm volatile(
+		"0:	.insn	rre,0xb93e0000,%1,%1\n" /* KIMD opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "=d" (ret), "+a" (__src), "+d" (__src_len)
+		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
+}
+
+/**
+ * crypt_s390_klmd:
+ * @func: the function code passed to KM; see crypt_s390_klmd_func
+ * @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
+ *
+ * Executes the KLMD (COMPUTE LAST MESSAGE DIGEST) operation of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of processed
+ * bytes for digest funcs
+ */
+static inline int crypt_s390_klmd(long func, void *param,
+				  const u8 *src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param asm("1") = param;
+	register const u8 *__src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	asm volatile(
+		"0:	.insn	rre,0xb93f0000,%1,%1\n" /* KLMD opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "=d" (ret), "+a" (__src), "+d" (__src_len)
+		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
+}
+
+/**
+ * crypt_s390_kmac:
+ * @func: the function code passed to KM; see crypt_s390_klmd_func
+ * @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
+ *
+ * Executes the KMAC (COMPUTE MESSAGE AUTHENTICATION CODE) operation
+ * of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of processed
+ * bytes for digest funcs
+ */
+static inline int crypt_s390_kmac(long func, void *param,
+				  const u8 *src, long src_len)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param asm("1") = param;
+	register const u8 *__src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	int ret;
+
+	asm volatile(
+		"0:	.insn	rre,0xb91e0000,%1,%1\n" /* KLAC opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "=d" (ret), "+a" (__src), "+d" (__src_len)
+		: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
+}
+
+/**
+ * crypt_s390_kmctr:
+ * @func: the function code passed to KMCTR; see crypt_s390_kmctr_func
+ * @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
+ *
+ * Executes the KMCTR (CIPHER MESSAGE WITH COUNTER) operation of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of processed
+ * bytes for encryption/decryption funcs
+ */
+static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
+				 const u8 *src, long src_len, u8 *counter)
+{
+	register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param asm("1") = param;
+	register const u8 *__src asm("2") = src;
+	register long __src_len asm("3") = src_len;
+	register u8 *__dest asm("4") = dest;
+	register u8 *__ctr asm("6") = counter;
+	int ret = -1;
+
+	asm volatile(
+		"0:	.insn	rrf,0xb92d0000,%3,%1,%4,0\n" /* KMCTR opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
+		  "+a" (__ctr)
+		: "d" (__func), "a" (__param) : "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
+}
+
+/**
+ * crypt_s390_ppno:
+ * @func: the function code passed to PPNO; see crypt_s390_ppno_func
+ * @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
+ *
+ * Executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
+ * operation of the CPU.
+ *
+ * Returns -1 for failure, 0 for the query func, number of random
+ * bytes stored in dest buffer for generate function
+ */
+static inline int crypt_s390_ppno(long func, void *param,
+				  u8 *dest, long dest_len,
+				  const u8 *seed, long seed_len)
+{
+	register long  __func	  asm("0") = func & CRYPT_S390_FUNC_MASK;
+	register void *__param	  asm("1") = param;    /* param block (240 bytes) */
+	register u8   *__dest	  asm("2") = dest;     /* buf for recv random bytes */
+	register long  __dest_len asm("3") = dest_len; /* requested random bytes */
+	register const u8 *__seed asm("4") = seed;     /* buf with seed data */
+	register long  __seed_len asm("5") = seed_len; /* bytes in seed buf */
+	int ret = -1;
+
+	asm volatile (
+		"0:	.insn	rre,0xb93c0000,%1,%5\n"	/* PPNO opcode */
+		"1:	brc	1,0b\n"	  /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "+d" (ret), "+a"(__dest), "+d"(__dest_len)
+		: "d"(__func), "a"(__param), "a"(__seed), "d"(__seed_len)
+		: "cc", "memory");
+	if (ret < 0)
+		return ret;
+	return (func & CRYPT_S390_FUNC_MASK) ? dest_len - __dest_len : 0;
+}
+
+/**
+ * crypt_s390_func_available:
+ * @func: the function code of the specific function; 0 if op in general
+ *
+ * Tests if a specific crypto function is implemented on the machine.
+ *
+ * Returns 1 if func available; 0 if func or op in general not available
+ */
+static inline int crypt_s390_func_available(int func,
+					    unsigned int facility_mask)
+{
+	unsigned char status[16];
+	int ret;
+
+	if (facility_mask & CRYPT_S390_MSA && !test_facility(17))
+		return 0;
+	if (facility_mask & CRYPT_S390_MSA3 && !test_facility(76))
+		return 0;
+	if (facility_mask & CRYPT_S390_MSA4 && !test_facility(77))
+		return 0;
+	if (facility_mask & CRYPT_S390_MSA5 && !test_facility(57))
+		return 0;
+
+	switch (func & CRYPT_S390_OP_MASK) {
+	case CRYPT_S390_KM:
+		ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
+		break;
+	case CRYPT_S390_KMC:
+		ret = crypt_s390_kmc(KMC_QUERY, &status, NULL, NULL, 0);
+		break;
+	case CRYPT_S390_KIMD:
+		ret = crypt_s390_kimd(KIMD_QUERY, &status, NULL, 0);
+		break;
+	case CRYPT_S390_KLMD:
+		ret = crypt_s390_klmd(KLMD_QUERY, &status, NULL, 0);
+		break;
+	case CRYPT_S390_KMAC:
+		ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
+		break;
+	case CRYPT_S390_KMCTR:
+		ret = crypt_s390_kmctr(KMCTR_QUERY, &status,
+				       NULL, NULL, 0, NULL);
+		break;
+	case CRYPT_S390_PPNO:
+		ret = crypt_s390_ppno(PPNO_QUERY, &status,
+				      NULL, 0, NULL, 0);
+		break;
+	default:
+		return 0;
+	}
+	if (ret < 0)
+		return 0;
+	func &= CRYPT_S390_FUNC_MASK;
+	func &= 0x7f;		/* mask modifier bit */
+	return (status[func >> 3] & (0x80 >> (func & 7))) != 0;
+}
+
+/**
+ * crypt_s390_pcc:
+ * @func: the function code passed to KM; see crypt_s390_km_func
+ * @param: address of parameter block; see POP for details on each func
+ *
+ * Executes the PCC (PERFORM CRYPTOGRAPHIC COMPUTATION) operation of the CPU.
+ *
+ * Returns -1 for failure, 0 for success.
+ */
+static inline int crypt_s390_pcc(long func, void *param)
+{
+	register long __func asm("0") = func & 0x7f; /* encrypt or decrypt */
+	register void *__param asm("1") = param;
+	int ret = -1;
+
+	asm volatile(
+		"0:	.insn	rre,0xb92c0000,0,0\n" /* PCC opcode */
+		"1:	brc	1,0b\n" /* handle partial completion */
+		"	la	%0,0\n"
+		"2:\n"
+		EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
+		: "+d" (ret)
+		: "d" (__func), "a" (__param) : "cc", "memory");
+	return ret;
+}
+
+#endif	/* _CRYPTO_ARCH_S390_CRYPT_S390_H */