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

Pull s390 updates from Martin Schwidefsky:
 "There is only one new feature in this pull for the 4.4 merge window,
  most of it is small enhancements, cleanup and bug fixes:

   - Add the s390 backend for the software dirty bit tracking.  This
     adds two new pgtable functions pte_clear_soft_dirty and
     pmd_clear_soft_dirty which is why there is a hit to
     arch/x86/include/asm/pgtable.h in this pull request.

   - A series of cleanup patches for the AP bus, this includes the
     removal of the support for two outdated crypto cards (PCICC and
     PCICA).

   - The irq handling / signaling on buffer full in the runtime
     instrumentation code is dropped.

   - Some micro optimizations: remove unnecessary memory barriers for a
     couple of functions: [smb_]rmb, [smb_]wmb, atomics, bitops, and for
     spin_unlock.  Use the builtin bswap if available and make
     test_and_set_bit_lock more cache friendly.

   - Statistics and a tracepoint for the diagnose calls to the
     hypervisor.

   - The CPU measurement facility support to sample KVM guests is
     improved.

   - The vector instructions are now always enabled for user space
     processes if the hardware has the vector facility.  This simplifies
     the FPU handling code.  The fpu-internal.h header is split into fpu
     internals, api and types just like x86.

   - Cleanup and improvements for the common I/O layer.

   - Rework udelay to solve a problem with kprobe.  udelay has busy loop
     semantics but still uses an idle processor state for the wait"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (66 commits)
  s390: remove runtime instrumentation interrupts
  s390/cio: de-duplicate subchannel validation
  s390/css: unneeded initialization in for_each_subchannel
  s390/Kconfig: use builtin bswap
  s390/dasd: fix disconnected device with valid path mask
  s390/dasd: fix invalid PAV assignment after suspend/resume
  s390/dasd: fix double free in dasd_eckd_read_conf
  s390/kernel: fix ptrace peek/poke for floating point registers
  s390/cio: move ccw_device_stlck functions
  s390/cio: move ccw_device_call_handler
  s390/topology: reduce per_cpu() invocations
  s390/nmi: reduce size of percpu variable
  s390/nmi: fix terminology
  s390/nmi: remove casts
  s390/nmi: remove pointless error strings
  s390: don't store registers on disabled wait anymore
  s390: get rid of __set_psw_mask()
  s390/fpu: split fpu-internal.h into fpu internals, api, and type headers
  s390/dasd: fix list_del corruption after lcu changes
  s390/spinlock: remove unneeded serializations at unlock
  ...

1 files changed, 0 insertions, 420 deletions

diff --git a/drivers/s390/crypto/zcrypt_pcica.c b/drivers/s390/crypto/zcrypt_pcica.c
deleted file mode 100644
index 7a743f4c646c..000000000000
--- a/drivers/s390/crypto/zcrypt_pcica.c
+++ /dev/null
@@ -1,420 +0,0 @@
-/*
- *  zcrypt 2.1.0
- *
- *  Copyright IBM Corp. 2001, 2006
- *  Author(s): Robert Burroughs
- *	       Eric Rossman (edrossma@us.ibm.com)
- *
- *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
- *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
- *				  Ralph Wuerthner <rwuerthn@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, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define KMSG_COMPONENT "zcrypt"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/atomic.h>
-#include <asm/uaccess.h>
-
-#include "ap_bus.h"
-#include "zcrypt_api.h"
-#include "zcrypt_error.h"
-#include "zcrypt_pcica.h"
-
-#define PCICA_MIN_MOD_SIZE	  1	/*    8 bits	*/
-#define PCICA_MAX_MOD_SIZE	256	/* 2048 bits	*/
-
-#define PCICA_SPEED_RATING	2800
-
-#define PCICA_MAX_MESSAGE_SIZE	0x3a0	/* sizeof(struct type4_lcr)	     */
-#define PCICA_MAX_RESPONSE_SIZE 0x110	/* max outputdatalength + type80_hdr */
-
-#define PCICA_CLEANUP_TIME	(15*HZ)
-
-static struct ap_device_id zcrypt_pcica_ids[] = {
-	{ AP_DEVICE(AP_DEVICE_TYPE_PCICA) },
-	{ /* end of list */ },
-};
-
-MODULE_DEVICE_TABLE(ap, zcrypt_pcica_ids);
-MODULE_AUTHOR("IBM Corporation");
-MODULE_DESCRIPTION("PCICA Cryptographic Coprocessor device driver, "
-		   "Copyright IBM Corp. 2001, 2006");
-MODULE_LICENSE("GPL");
-
-static int zcrypt_pcica_probe(struct ap_device *ap_dev);
-static void zcrypt_pcica_remove(struct ap_device *ap_dev);
-static void zcrypt_pcica_receive(struct ap_device *, struct ap_message *,
-				 struct ap_message *);
-
-static struct ap_driver zcrypt_pcica_driver = {
-	.probe = zcrypt_pcica_probe,
-	.remove = zcrypt_pcica_remove,
-	.ids = zcrypt_pcica_ids,
-	.request_timeout = PCICA_CLEANUP_TIME,
-};
-
-/**
- * Convert a ICAMEX message to a type4 MEX message.
- *
- * @zdev: crypto device pointer
- * @zreq: crypto request pointer
- * @mex: pointer to user input data
- *
- * Returns 0 on success or -EFAULT.
- */
-static int ICAMEX_msg_to_type4MEX_msg(struct zcrypt_device *zdev,
-				      struct ap_message *ap_msg,
-				      struct ica_rsa_modexpo *mex)
-{
-	unsigned char *modulus, *exponent, *message;
-	int mod_len;
-
-	mod_len = mex->inputdatalength;
-
-	if (mod_len <= 128) {
-		struct type4_sme *sme = ap_msg->message;
-		memset(sme, 0, sizeof(*sme));
-		ap_msg->length = sizeof(*sme);
-		sme->header.msg_fmt = TYPE4_SME_FMT;
-		sme->header.msg_len = sizeof(*sme);
-		sme->header.msg_type_code = TYPE4_TYPE_CODE;
-		sme->header.request_code = TYPE4_REQU_CODE;
-		modulus = sme->modulus + sizeof(sme->modulus) - mod_len;
-		exponent = sme->exponent + sizeof(sme->exponent) - mod_len;
-		message = sme->message + sizeof(sme->message) - mod_len;
-	} else {
-		struct type4_lme *lme = ap_msg->message;
-		memset(lme, 0, sizeof(*lme));
-		ap_msg->length = sizeof(*lme);
-		lme->header.msg_fmt = TYPE4_LME_FMT;
-		lme->header.msg_len = sizeof(*lme);
-		lme->header.msg_type_code = TYPE4_TYPE_CODE;
-		lme->header.request_code = TYPE4_REQU_CODE;
-		modulus = lme->modulus + sizeof(lme->modulus) - mod_len;
-		exponent = lme->exponent + sizeof(lme->exponent) - mod_len;
-		message = lme->message + sizeof(lme->message) - mod_len;
-	}
-
-	if (copy_from_user(modulus, mex->n_modulus, mod_len) ||
-	    copy_from_user(exponent, mex->b_key, mod_len) ||
-	    copy_from_user(message, mex->inputdata, mod_len))
-		return -EFAULT;
-	return 0;
-}
-
-/**
- * Convert a ICACRT message to a type4 CRT message.
- *
- * @zdev: crypto device pointer
- * @zreq: crypto request pointer
- * @crt: pointer to user input data
- *
- * Returns 0 on success or -EFAULT.
- */
-static int ICACRT_msg_to_type4CRT_msg(struct zcrypt_device *zdev,
-				      struct ap_message *ap_msg,
-				      struct ica_rsa_modexpo_crt *crt)
-{
-	unsigned char *p, *q, *dp, *dq, *u, *inp;
-	int mod_len, short_len, long_len;
-
-	mod_len = crt->inputdatalength;
-	short_len = mod_len / 2;
-	long_len = mod_len / 2 + 8;
-
-	if (mod_len <= 128) {
-		struct type4_scr *scr = ap_msg->message;
-		memset(scr, 0, sizeof(*scr));
-		ap_msg->length = sizeof(*scr);
-		scr->header.msg_type_code = TYPE4_TYPE_CODE;
-		scr->header.request_code = TYPE4_REQU_CODE;
-		scr->header.msg_fmt = TYPE4_SCR_FMT;
-		scr->header.msg_len = sizeof(*scr);
-		p = scr->p + sizeof(scr->p) - long_len;
-		q = scr->q + sizeof(scr->q) - short_len;
-		dp = scr->dp + sizeof(scr->dp) - long_len;
-		dq = scr->dq + sizeof(scr->dq) - short_len;
-		u = scr->u + sizeof(scr->u) - long_len;
-		inp = scr->message + sizeof(scr->message) - mod_len;
-	} else {
-		struct type4_lcr *lcr = ap_msg->message;
-		memset(lcr, 0, sizeof(*lcr));
-		ap_msg->length = sizeof(*lcr);
-		lcr->header.msg_type_code = TYPE4_TYPE_CODE;
-		lcr->header.request_code = TYPE4_REQU_CODE;
-		lcr->header.msg_fmt = TYPE4_LCR_FMT;
-		lcr->header.msg_len = sizeof(*lcr);
-		p = lcr->p + sizeof(lcr->p) - long_len;
-		q = lcr->q + sizeof(lcr->q) - short_len;
-		dp = lcr->dp + sizeof(lcr->dp) - long_len;
-		dq = lcr->dq + sizeof(lcr->dq) - short_len;
-		u = lcr->u + sizeof(lcr->u) - long_len;
-		inp = lcr->message + sizeof(lcr->message) - mod_len;
-	}
-
-	if (copy_from_user(p, crt->np_prime, long_len) ||
-	    copy_from_user(q, crt->nq_prime, short_len) ||
-	    copy_from_user(dp, crt->bp_key, long_len) ||
-	    copy_from_user(dq, crt->bq_key, short_len) ||
-	    copy_from_user(u, crt->u_mult_inv, long_len) ||
-	    copy_from_user(inp, crt->inputdata, mod_len))
-		return -EFAULT;
-	return 0;
-}
-
-/**
- * Copy results from a type 84 reply message back to user space.
- *
- * @zdev: crypto device pointer
- * @reply: reply AP message.
- * @data: pointer to user output data
- * @length: size of user output data
- *
- * Returns 0 on success or -EFAULT.
- */
-static int convert_type84(struct zcrypt_device *zdev,
-			  struct ap_message *reply,
-			  char __user *outputdata,
-			  unsigned int outputdatalength)
-{
-	struct type84_hdr *t84h = reply->message;
-	char *data;
-
-	if (t84h->len < sizeof(*t84h) + outputdatalength) {
-		/* The result is too short, the PCICA card may not do that.. */
-		zdev->online = 0;
-		pr_err("Cryptographic device %x failed and was set offline\n",
-		       zdev->ap_dev->qid);
-		ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%drc%d",
-			       zdev->ap_dev->qid, zdev->online, t84h->code);
-		return -EAGAIN;	/* repeat the request on a different device. */
-	}
-	BUG_ON(t84h->len > PCICA_MAX_RESPONSE_SIZE);
-	data = reply->message + t84h->len - outputdatalength;
-	if (copy_to_user(outputdata, data, outputdatalength))
-		return -EFAULT;
-	return 0;
-}
-
-static int convert_response(struct zcrypt_device *zdev,
-			    struct ap_message *reply,
-			    char __user *outputdata,
-			    unsigned int outputdatalength)
-{
-	/* Response type byte is the second byte in the response. */
-	switch (((unsigned char *) reply->message)[1]) {
-	case TYPE82_RSP_CODE:
-	case TYPE88_RSP_CODE:
-		return convert_error(zdev, reply);
-	case TYPE84_RSP_CODE:
-		return convert_type84(zdev, reply,
-				      outputdata, outputdatalength);
-	default: /* Unknown response type, this should NEVER EVER happen */
-		zdev->online = 0;
-		pr_err("Cryptographic device %x failed and was set offline\n",
-		       zdev->ap_dev->qid);
-		ZCRYPT_DBF_DEV(DBF_ERR, zdev, "dev%04xo%dfail",
-			       zdev->ap_dev->qid, zdev->online);
-		return -EAGAIN;	/* repeat the request on a different device. */
-	}
-}
-
-/**
- * This function is called from the AP bus code after a crypto request
- * "msg" has finished with the reply message "reply".
- * It is called from tasklet context.
- * @ap_dev: pointer to the AP device
- * @msg: pointer to the AP message
- * @reply: pointer to the AP reply message
- */
-static void zcrypt_pcica_receive(struct ap_device *ap_dev,
-				 struct ap_message *msg,
-				 struct ap_message *reply)
-{
-	static struct error_hdr error_reply = {
-		.type = TYPE82_RSP_CODE,
-		.reply_code = REP82_ERROR_MACHINE_FAILURE,
-	};
-	struct type84_hdr *t84h;
-	int length;
-
-	/* Copy the reply message to the request message buffer. */
-	if (IS_ERR(reply)) {
-		memcpy(msg->message, &error_reply, sizeof(error_reply));
-		goto out;
-	}
-	t84h = reply->message;
-	if (t84h->code == TYPE84_RSP_CODE) {
-		length = min(PCICA_MAX_RESPONSE_SIZE, (int) t84h->len);
-		memcpy(msg->message, reply->message, length);
-	} else
-		memcpy(msg->message, reply->message, sizeof error_reply);
-out:
-	complete((struct completion *) msg->private);
-}
-
-static atomic_t zcrypt_step = ATOMIC_INIT(0);
-
-/**
- * The request distributor calls this function if it picked the PCICA
- * device to handle a modexpo request.
- * @zdev: pointer to zcrypt_device structure that identifies the
- *	  PCICA device to the request distributor
- * @mex: pointer to the modexpo request buffer
- */
-static long zcrypt_pcica_modexpo(struct zcrypt_device *zdev,
-				 struct ica_rsa_modexpo *mex)
-{
-	struct ap_message ap_msg;
-	struct completion work;
-	int rc;
-
-	ap_init_message(&ap_msg);
-	ap_msg.message = kmalloc(PCICA_MAX_MESSAGE_SIZE, GFP_KERNEL);
-	if (!ap_msg.message)
-		return -ENOMEM;
-	ap_msg.receive = zcrypt_pcica_receive;
-	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
-				atomic_inc_return(&zcrypt_step);
-	ap_msg.private = &work;
-	rc = ICAMEX_msg_to_type4MEX_msg(zdev, &ap_msg, mex);
-	if (rc)
-		goto out_free;
-	init_completion(&work);
-	ap_queue_message(zdev->ap_dev, &ap_msg);
-	rc = wait_for_completion_interruptible(&work);
-	if (rc == 0)
-		rc = convert_response(zdev, &ap_msg, mex->outputdata,
-				      mex->outputdatalength);
-	else
-		/* Signal pending. */
-		ap_cancel_message(zdev->ap_dev, &ap_msg);
-out_free:
-	kfree(ap_msg.message);
-	return rc;
-}
-
-/**
- * The request distributor calls this function if it picked the PCICA
- * device to handle a modexpo_crt request.
- * @zdev: pointer to zcrypt_device structure that identifies the
- *	  PCICA device to the request distributor
- * @crt: pointer to the modexpoc_crt request buffer
- */
-static long zcrypt_pcica_modexpo_crt(struct zcrypt_device *zdev,
-				     struct ica_rsa_modexpo_crt *crt)
-{
-	struct ap_message ap_msg;
-	struct completion work;
-	int rc;
-
-	ap_init_message(&ap_msg);
-	ap_msg.message = kmalloc(PCICA_MAX_MESSAGE_SIZE, GFP_KERNEL);
-	if (!ap_msg.message)
-		return -ENOMEM;
-	ap_msg.receive = zcrypt_pcica_receive;
-	ap_msg.psmid = (((unsigned long long) current->pid) << 32) +
-				atomic_inc_return(&zcrypt_step);
-	ap_msg.private = &work;
-	rc = ICACRT_msg_to_type4CRT_msg(zdev, &ap_msg, crt);
-	if (rc)
-		goto out_free;
-	init_completion(&work);
-	ap_queue_message(zdev->ap_dev, &ap_msg);
-	rc = wait_for_completion_interruptible(&work);
-	if (rc == 0)
-		rc = convert_response(zdev, &ap_msg, crt->outputdata,
-				      crt->outputdatalength);
-	else
-		/* Signal pending. */
-		ap_cancel_message(zdev->ap_dev, &ap_msg);
-out_free:
-	kfree(ap_msg.message);
-	return rc;
-}
-
-/**
- * The crypto operations for a PCICA card.
- */
-static struct zcrypt_ops zcrypt_pcica_ops = {
-	.rsa_modexpo = zcrypt_pcica_modexpo,
-	.rsa_modexpo_crt = zcrypt_pcica_modexpo_crt,
-};
-
-/**
- * Probe function for PCICA cards. It always accepts the AP device
- * since the bus_match already checked the hardware type.
- * @ap_dev: pointer to the AP device.
- */
-static int zcrypt_pcica_probe(struct ap_device *ap_dev)
-{
-	struct zcrypt_device *zdev;
-	int rc;
-
-	zdev = zcrypt_device_alloc(PCICA_MAX_RESPONSE_SIZE);
-	if (!zdev)
-		return -ENOMEM;
-	zdev->ap_dev = ap_dev;
-	zdev->ops = &zcrypt_pcica_ops;
-	zdev->online = 1;
-	zdev->user_space_type = ZCRYPT_PCICA;
-	zdev->type_string = "PCICA";
-	zdev->min_mod_size = PCICA_MIN_MOD_SIZE;
-	zdev->max_mod_size = PCICA_MAX_MOD_SIZE;
-	zdev->speed_rating = PCICA_SPEED_RATING;
-	zdev->max_exp_bit_length = PCICA_MAX_MOD_SIZE;
-	ap_dev->reply = &zdev->reply;
-	ap_dev->private = zdev;
-	rc = zcrypt_device_register(zdev);
-	if (rc)
-		goto out_free;
-	return 0;
-
-out_free:
-	ap_dev->private = NULL;
-	zcrypt_device_free(zdev);
-	return rc;
-}
-
-/**
- * This is called to remove the extended PCICA driver information
- * if an AP device is removed.
- */
-static void zcrypt_pcica_remove(struct ap_device *ap_dev)
-{
-	struct zcrypt_device *zdev = ap_dev->private;
-
-	zcrypt_device_unregister(zdev);
-}
-
-int __init zcrypt_pcica_init(void)
-{
-	return ap_driver_register(&zcrypt_pcica_driver, THIS_MODULE, "pcica");
-}
-
-void zcrypt_pcica_exit(void)
-{
-	ap_driver_unregister(&zcrypt_pcica_driver);
-}
-
-module_init(zcrypt_pcica_init);
-module_exit(zcrypt_pcica_exit);