Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:
 "Since Martin is on vacation you get the s390 pull request for the
  v4.15 merge window this time from me.

  Besides a lot of cleanups and bug fixes these are the most important
  changes:

   - a new regset for runtime instrumentation registers

   - hardware accelerated AES-GCM support for the aes_s390 module

   - support for the new CEX6S crypto cards

   - support for FORTIFY_SOURCE

   - addition of missing z13 and new z14 instructions to the in-kernel
     disassembler

   - generate opcode tables for the in-kernel disassembler out of a
     simple text file instead of having to manually maintain those
     tables

   - fast memset16, memset32 and memset64 implementations

   - removal of named saved segment support

   - hardware counter support for z14

   - queued spinlocks and queued rwlocks implementations for s390

   - use the stack_depth tracking feature for s390 BPF JIT

   - a new s390_sthyi system call which emulates the sthyi (store
     hypervisor information) instruction

   - removal of the old KVM virtio transport

   - an s390 specific CPU alternatives implementation which is used in
     the new spinlock code"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (88 commits)
  MAINTAINERS: add virtio-ccw.h to virtio/s390 section
  s390/noexec: execute kexec datamover without DAT
  s390: fix transactional execution control register handling
  s390/bpf: take advantage of stack_depth tracking
  s390: simplify transactional execution elf hwcap handling
  s390/zcrypt: Rework struct ap_qact_ap_info.
  s390/virtio: remove unused header file kvm_virtio.h
  s390: avoid undefined behaviour
  s390/disassembler: generate opcode tables from text file
  s390/disassembler: remove insn_to_mnemonic()
  s390/dasd: avoid calling do_gettimeofday()
  s390: vfio-ccw: Do not attempt to free no-op, test and tic cda.
  s390: remove named saved segment support
  s390/archrandom: Reconsider s390 arch random implementation
  s390/pci: do not require AIS facility
  s390/qdio: sanitize put_indicator
  s390/qdio: use atomic_cmpxchg
  s390/nmi: avoid using long-displacement facility
  s390: pass endianness info to sparse
  s390/decompressor: remove informational messages
  ...

1 files changed, 51 insertions, 1 deletions

diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h
index 056670ebba67..3cc52e37b4b2 100644
--- a/arch/s390/include/asm/cpacf.h
+++ b/arch/s390/include/asm/cpacf.h
@@ -2,7 +2,7 @@
 /*
  * 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)
@@ -134,6 +134,22 @@
 #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;
 
 /**
@@ -179,6 +195,8 @@ 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();
 	}
@@ -470,4 +488,36 @@ 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 */