Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linu…

…x-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (37 commits)
  [S390] Avoid excessive inlining.
  [S390] Mark kernel text section read-only.
  [S390] Convert memory detection into C code.
  [S390] Calibrate delay and bogomips.
  [S390] Hypervisor filesystem (s390_hypfs) for z/VM
  [S390] Add crypto support for 3592 tape devices
  [S390] boot from NSS support
  [S390] Support for s390 Pseudo Random Number Generator
  [S390] ETR support.
  [S390] noexec protection
  [S390] move crypto options and some cleanup.
  [S390] cio: Don't spam debug feature.
  [S390] Cleanup of CHSC event handling.
  [S390] cio: declare hardware structures packed.
  [S390] Add set_fs(USER_DS) to start_thread().
  [S390] cio: Catch operand exceptions on stsch.
  [S390] Fix register usage description.
  [S390] kretprobe_trampoline_holder() in wrong section.
  [S390] Fix kprobes breakpoint handling.
  [S390] Update maintainers file.
  ...

Documentation/s390/Debugging390.txt

@@ -480,7 +480,7 @@ r2       argument 0 / return value 0                call-clobbered
 r3       argument 1 / return value 1 (if long long) call-clobbered
 r4       argument 2                                 call-clobbered
 r5       argument 3                                 call-clobbered
-r6	 argument 5                                 saved
+r6	 argument 4				    saved
 r7       pointer-to arguments 5 to ...              saved      
 r8       this & that                                saved
 r9       this & that                                saved

MAINTAINERS

@@ -2791,23 +2791,23 @@ M:	schwidefsky@de.ibm.com
 P:	Heiko Carstens
 M:	heiko.carstens@de.ibm.com
 M:	linux390@de.ibm.com
-L:	linux-390@vm.marist.edu
+L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported
 
 S390 NETWORK DRIVERS
 P:	Frank Pavlic
 M:	fpavlic@de.ibm.com
 M:	linux390@de.ibm.com
-L:	linux-390@vm.marist.edu
+L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported
 
 S390 ZFCP DRIVER
 P:	Swen Schillig
 M:	swen@vnet.ibm.com
 M:	linux390@de.ibm.com
-L:	linux-390@vm.marist.edu
+L:	linux-s390@vger.kernel.org
 W:	http://www.ibm.com/developerworks/linux/linux390/
 S:	Supported
 

arch/s390/Kconfig

@@ -34,10 +34,6 @@ config GENERIC_HWEIGHT
 	bool
 	default y
 
-config GENERIC_CALIBRATE_DELAY
-	bool
-	default y
-
 config GENERIC_TIME
 	def_bool y
 
@@ -134,6 +130,31 @@ config AUDIT_ARCH
 	bool
 	default y
 
+config S390_SWITCH_AMODE
+	bool "Switch kernel/user addressing modes"
+	help
+	  This option allows to switch the addressing modes of kernel and user
+	  space. The kernel parameter switch_amode=on will enable this feature,
+	  default is disabled. Enabling this (via kernel parameter) on machines
+	  earlier than IBM System z9-109 EC/BC will reduce system performance.
+
+	  Note that this option will also be selected by selecting the execute
+	  protection option below. Enabling the execute protection via the
+	  noexec kernel parameter will also switch the addressing modes,
+	  independent of the switch_amode kernel parameter.
+
+
+config S390_EXEC_PROTECT
+	bool "Data execute protection"
+	select S390_SWITCH_AMODE
+	help
+	  This option allows to enable a buffer overflow protection for user
+	  space programs and it also selects the addressing mode option above.
+	  The kernel parameter noexec=on will enable this feature and also
+	  switch the addressing modes, default is disabled. Enabling this (via
+	  kernel parameter) on machines earlier than IBM System z9-109 EC/BC
+	  will reduce system performance.
+
 comment "Code generation options"
 
 choice

arch/s390/appldata/appldata_base.c

@@ -81,7 +81,7 @@ static struct ctl_table appldata_dir_table[] = {
 /*
  * Timer
  */
-DEFINE_PER_CPU(struct vtimer_list, appldata_timer);
+static DEFINE_PER_CPU(struct vtimer_list, appldata_timer);
 static atomic_t appldata_expire_count = ATOMIC_INIT(0);
 
 static DEFINE_SPINLOCK(appldata_timer_lock);

arch/s390/appldata/appldata_mem.c

@@ -36,7 +36,7 @@
  * book:
  * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
  */
-struct appldata_mem_data {
+static struct appldata_mem_data {
 	u64 timestamp;
 	u32 sync_count_1;       /* after VM collected the record data, */
 	u32 sync_count_2;	/* sync_count_1 and sync_count_2 should be the

arch/s390/appldata/appldata_net_sum.c

@@ -34,7 +34,7 @@
  * book:
  * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
  */
-struct appldata_net_sum_data {
+static struct appldata_net_sum_data {
 	u64 timestamp;
 	u32 sync_count_1;	/* after VM collected the record data, */
 	u32 sync_count_2;	/* sync_count_1 and sync_count_2 should be the

arch/s390/crypto/Kconfig

@@ -0,0 +1,60 @@
+config CRYPTO_SHA1_S390
+	tristate "SHA1 digest algorithm"
+	depends on S390
+	select CRYPTO_ALGAPI
+	help
+	  This is the s390 hardware accelerated implementation of the
+	  SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
+
+config CRYPTO_SHA256_S390
+	tristate "SHA256 digest algorithm"
+	depends on S390
+	select CRYPTO_ALGAPI
+	help
+	  This is the s390 hardware accelerated implementation of the
+	  SHA256 secure hash standard (DFIPS 180-2).
+
+	  This version of SHA implements a 256 bit hash with 128 bits of
+	  security against collision attacks.
+
+config CRYPTO_DES_S390
+	tristate "DES and Triple DES cipher algorithms"
+	depends on S390
+	select CRYPTO_ALGAPI
+	select CRYPTO_BLKCIPHER
+	help
+	  This us the s390 hardware accelerated implementation of the
+	  DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).
+
+config CRYPTO_AES_S390
+	tristate "AES cipher algorithms"
+	depends on S390
+	select CRYPTO_ALGAPI
+	select CRYPTO_BLKCIPHER
+	help
+	  This is the s390 hardware accelerated implementation of the
+	  AES cipher algorithms (FIPS-197). AES uses the Rijndael
+	  algorithm.
+
+	  Rijndael appears to be consistently a very good performer in
+	  both hardware and software across a wide range of computing
+	  environments regardless of its use in feedback or non-feedback
+	  modes. Its key setup time is excellent, and its key agility is
+	  good. Rijndael's very low memory requirements make it very well
+	  suited for restricted-space environments, in which it also
+	  demonstrates excellent performance. Rijndael's operations are
+	  among the easiest to defend against power and timing attacks.
+
+	  On s390 the System z9-109 currently only supports the key size
+	  of 128 bit.
+
+config S390_PRNG
+	tristate "Pseudo random number generator device driver"
+	depends on S390
+	default "m"
+	help
+	  Select this option if you want to use the s390 pseudo random number
+	  generator. The PRNG is part of the cryptograhic processor functions
+	  and uses triple-DES to generate secure random numbers like the
+	  ANSI X9.17 standard. The PRNG is usable via the char device
+	  /dev/prandom.

arch/s390/crypto/Makefile

@@ -6,5 +6,4 @@ obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o
 obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o
 obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o des_check_key.o
 obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o
-
-obj-$(CONFIG_CRYPTO_TEST) += crypt_s390_query.o
+obj-$(CONFIG_S390_PRNG) += prng.o

arch/s390/crypto/aes_s390.c

@@ -4,7 +4,7 @@
  * s390 implementation of the AES Cipher Algorithm.
  *
  * s390 Version:
- *   Copyright (C) 2005 IBM Deutschland GmbH, IBM Corporation
+ *   Copyright IBM Corp. 2005,2007
  *   Author(s): Jan Glauber (jang@de.ibm.com)
  *
  * Derived from "crypto/aes.c"
@@ -27,9 +27,11 @@
 /* data block size for all key lengths */
 #define AES_BLOCK_SIZE		16
 
-int has_aes_128 = 0;
-int has_aes_192 = 0;
-int has_aes_256 = 0;
+#define AES_KEYLEN_128		1
+#define AES_KEYLEN_192		2
+#define AES_KEYLEN_256		4
+
+static char keylen_flag = 0;
 
 struct s390_aes_ctx {
 	u8 iv[AES_BLOCK_SIZE];
@@ -47,20 +49,19 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 
 	switch (key_len) {
 	case 16:
-		if (!has_aes_128)
+		if (!(keylen_flag & AES_KEYLEN_128))
 			goto fail;
 		break;
 	case 24:
-		if (!has_aes_192)
+		if (!(keylen_flag & AES_KEYLEN_192))
 			goto fail;
 
 		break;
 	case 32:
-		if (!has_aes_256)
+		if (!(keylen_flag & AES_KEYLEN_256))
 			goto fail;
 		break;
 	default:
-		/* invalid key length */
 		goto fail;
 		break;
 	}
@@ -322,34 +323,32 @@ static int __init aes_init(void)
 	int ret;
 
 	if (crypt_s390_func_available(KM_AES_128_ENCRYPT))
-		has_aes_128 = 1;
+		keylen_flag |= AES_KEYLEN_128;
 	if (crypt_s390_func_available(KM_AES_192_ENCRYPT))
-		has_aes_192 = 1;
+		keylen_flag |= AES_KEYLEN_192;
 	if (crypt_s390_func_available(KM_AES_256_ENCRYPT))
-		has_aes_256 = 1;
+		keylen_flag |= AES_KEYLEN_256;
+
+	if (!keylen_flag)
+		return -EOPNOTSUPP;
 
-	if (!has_aes_128 && !has_aes_192 && !has_aes_256)
-		return -ENOSYS;
+	/* z9 109 and z9 BC/EC only support 128 bit key length */
+	if (keylen_flag == AES_KEYLEN_128)
+		printk(KERN_INFO
+		       "aes_s390: hardware acceleration only available for"
+		       "128 bit keys\n");
 
 	ret = crypto_register_alg(&aes_alg);
-	if (ret != 0) {
-		printk(KERN_INFO "crypt_s390: aes-s390 couldn't be loaded.\n");
+	if (ret)
 		goto aes_err;
-	}
 
 	ret = crypto_register_alg(&ecb_aes_alg);
-	if (ret != 0) {
-		printk(KERN_INFO
-		       "crypt_s390: ecb-aes-s390 couldn't be loaded.\n");
+	if (ret)
 		goto ecb_aes_err;
-	}
 
 	ret = crypto_register_alg(&cbc_aes_alg);
-	if (ret != 0) {
-		printk(KERN_INFO
-		       "crypt_s390: cbc-aes-s390 couldn't be loaded.\n");
+	if (ret)
 		goto cbc_aes_err;
-	}
 
 out:
 	return ret;