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-rw-r--r--arch/s390/include/asm/cpacf.h410
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diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h
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index 000000000..1a82cf26e
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+++ b/arch/s390/include/asm/cpacf.h
@@ -0,0 +1,410 @@
+/*
+ * 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_PCC 0xb92c /* MSA4 */
+#define CPACF_KMCTR 0xb92d /* MSA4 */
+#define CPACF_PPNO 0xb93c /* MSA5 */
+
+/*
+ * Function codes for the KM (CIPHER MESSAGE)
+ * instruction (0x80 is the decipher modifier bit)
+ */
+#define CPACF_KM_QUERY 0x00
+#define CPACF_KM_DEA_ENC 0x01
+#define CPACF_KM_DEA_DEC 0x81
+#define CPACF_KM_TDEA_128_ENC 0x02
+#define CPACF_KM_TDEA_128_DEC 0x82
+#define CPACF_KM_TDEA_192_ENC 0x03
+#define CPACF_KM_TDEA_192_DEC 0x83
+#define CPACF_KM_AES_128_ENC 0x12
+#define CPACF_KM_AES_128_DEC 0x92
+#define CPACF_KM_AES_192_ENC 0x13
+#define CPACF_KM_AES_192_DEC 0x93
+#define CPACF_KM_AES_256_ENC 0x14
+#define CPACF_KM_AES_256_DEC 0x94
+#define CPACF_KM_XTS_128_ENC 0x32
+#define CPACF_KM_XTS_128_DEC 0xb2
+#define CPACF_KM_XTS_256_ENC 0x34
+#define CPACF_KM_XTS_256_DEC 0xb4
+
+/*
+ * Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
+ * instruction (0x80 is the decipher modifier bit)
+ */
+#define CPACF_KMC_QUERY 0x00
+#define CPACF_KMC_DEA_ENC 0x01
+#define CPACF_KMC_DEA_DEC 0x81
+#define CPACF_KMC_TDEA_128_ENC 0x02
+#define CPACF_KMC_TDEA_128_DEC 0x82
+#define CPACF_KMC_TDEA_192_ENC 0x03
+#define CPACF_KMC_TDEA_192_DEC 0x83
+#define CPACF_KMC_AES_128_ENC 0x12
+#define CPACF_KMC_AES_128_DEC 0x92
+#define CPACF_KMC_AES_192_ENC 0x13
+#define CPACF_KMC_AES_192_DEC 0x93
+#define CPACF_KMC_AES_256_ENC 0x14
+#define CPACF_KMC_AES_256_DEC 0x94
+#define CPACF_KMC_PRNG 0x43
+
+/*
+ * Function codes for the KMCTR (CIPHER MESSAGE WITH COUNTER)
+ * instruction (0x80 is the decipher modifier bit)
+ */
+#define CPACF_KMCTR_QUERY 0x00
+#define CPACF_KMCTR_DEA_ENC 0x01
+#define CPACF_KMCTR_DEA_DEC 0x81
+#define CPACF_KMCTR_TDEA_128_ENC 0x02
+#define CPACF_KMCTR_TDEA_128_DEC 0x82
+#define CPACF_KMCTR_TDEA_192_ENC 0x03
+#define CPACF_KMCTR_TDEA_192_DEC 0x83
+#define CPACF_KMCTR_AES_128_ENC 0x12
+#define CPACF_KMCTR_AES_128_DEC 0x92
+#define CPACF_KMCTR_AES_192_ENC 0x13
+#define CPACF_KMCTR_AES_192_DEC 0x93
+#define CPACF_KMCTR_AES_256_ENC 0x14
+#define CPACF_KMCTR_AES_256_DEC 0x94
+
+/*
+ * Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
+ * instruction (0x80 is the decipher modifier bit)
+ */
+#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 (0x80 is the decipher modifier bit)
+ */
+#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 (0x80 is the decipher modifier bit)
+ */
+#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 (0x80 is the decipher modifier bit)
+ */
+#define CPACF_PPNO_QUERY 0x00
+#define CPACF_PPNO_SHA512_DRNG_GEN 0x03
+#define CPACF_PPNO_SHA512_DRNG_SEED 0x83
+
+/**
+ * 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, unsigned char *status)
+{
+ typedef struct { unsigned char _[16]; } status_type;
+ register unsigned long r0 asm("0") = 0; /* query function */
+ register unsigned long r1 asm("1") = (unsigned long) status;
+
+ asm volatile(
+ /* 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" (*(status_type *) status)
+ : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (opcode)
+ : "cc");
+}
+
+static inline int cpacf_query(unsigned int opcode, unsigned int func)
+{
+ unsigned char status[16];
+
+ switch (opcode) {
+ case CPACF_KMAC:
+ case CPACF_KM:
+ case CPACF_KMC:
+ case CPACF_KIMD:
+ case CPACF_KLMD:
+ if (!test_facility(17)) /* check for MSA */
+ return 0;
+ break;
+ case CPACF_PCC:
+ case CPACF_KMCTR:
+ if (!test_facility(77)) /* check for MSA4 */
+ return 0;
+ break;
+ case CPACF_PPNO:
+ if (!test_facility(57)) /* check for MSA5 */
+ return 0;
+ break;
+ default:
+ BUG();
+ }
+ __cpacf_query(opcode, status);
+ return (status[func >> 3] & (0x80 >> (func & 7))) != 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(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(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
+ *
+ * Returns 0 for the query func, number of processed bytes for digest funcs
+ */
+static inline int cpacf_kimd(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");
+
+ return src_len - r3;
+}
+
+/**
+ * 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
+ *
+ * Returns 0 for the query func, number of processed bytes for digest funcs
+ */
+static inline int cpacf_klmd(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");
+
+ return src_len - r3;
+}
+
+/**
+ * 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(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(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
+ *
+ * Returns 0 for the query func, number of random bytes stored in
+ * dest buffer for generate function
+ */
+static inline int cpacf_ppno(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");
+
+ return dest_len - r3;
+}
+
+/**
+ * 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
+ *
+ * Returns 0.
+ */
+static inline int cpacf_pcc(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");
+
+ return 0;
+}
+
+#endif /* _ASM_S390_CPACF_H */