s390/crypto: add inline assembly for KMA instruction to cpacf.h (eecd49c4) · Commits · e / devices / android_kernel_fairphone_FP5

arch/s390/include/asm/cpacf.h

+51 −1

Original line number	Diff line number	Diff line
		/*
		* CP Assist for Cryptographic Functions (CPACF)
		*
		* Copyright IBM Corp. 2003, 2016
		* Copyright IBM Corp. 2003, 2017
		* Author(s): Thomas Spatzier
		* Jan Glauber
		* Harald Freudenberger (freude@de.ibm.com)
		@@ -133,6 +133,22 @@
		#define CPACF_PRNO_TRNG_Q_R2C_RATIO 0x70
		#define CPACF_PRNO_TRNG 0x72

		/*
		* Function codes for the KMA (CIPHER MESSAGE WITH AUTHENTICATION)
		* instruction
		*/
		#define CPACF_KMA_QUERY 0x00
		#define CPACF_KMA_GCM_AES_128 0x12
		#define CPACF_KMA_GCM_AES_192 0x13
		#define CPACF_KMA_GCM_AES_256 0x14

		/*
		* Flags for the KMA (CIPHER MESSAGE WITH AUTHENTICATION) instruction
		*/
		#define CPACF_KMA_LPC 0x100 /* Last-Plaintext/Ciphertext */
		#define CPACF_KMA_LAAD 0x200 /* Last-AAD */
		#define CPACF_KMA_HS 0x400 /* Hash-subkey Supplied */

		typedef struct { unsigned char bytes[16]; } cpacf_mask_t;

		/**
		@@ -178,6 +194,8 @@ static inline int __cpacf_check_opcode(unsigned int opcode)
		return test_facility(77); /* check for MSA4 */
		case CPACF_PRNO:
		return test_facility(57); /* check for MSA5 */
		case CPACF_KMA:
		return test_facility(146); /* check for MSA8 */
		default:
		BUG();
		}
		@@ -469,4 +487,36 @@ static inline void cpacf_pckmo(long func, void *param)
		: "cc", "memory");
		}

		/**
		* 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)
		{
		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) aad;
		register unsigned long r5 asm("5") = (unsigned long) aad_len;
		register unsigned long r6 asm("6") = (unsigned long) dest;

		asm volatile(
		"0: .insn rrf,%[opc] << 16,%[dst],%[src],%[aad],0\n"
		" brc 1,0b\n" /* handle partial completion */
		: [dst] "+a" (r6), [src] "+a" (r2), [slen] "+d" (r3),
		[aad] "+a" (r4), [alen] "+d" (r5)
		: [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_KMA)
		: "cc", "memory");
		}

		#endif /* _ASM_S390_CPACF_H */