[deliverable/linux.git] / arch / s390 / kvm / sigp.c

/*
 * sigp.c - handlinge interprocessor communication
 *
 * Copyright IBM Corp. 2008,2009
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2 only)
 * as published by the Free Software Foundation.
 *
 *    Author(s): Carsten Otte <cotte@de.ibm.com>
 *               Christian Borntraeger <borntraeger@de.ibm.com>
 *               Christian Ehrhardt <ehrhardt@de.ibm.com>
 */

#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/slab.h>
#include "gaccess.h"
#include "kvm-s390.h"

/* sigp order codes */
#define SIGP_SENSE             0x01
#define SIGP_EXTERNAL_CALL     0x02
#define SIGP_EMERGENCY         0x03
#define SIGP_START             0x04
#define SIGP_STOP              0x05
#define SIGP_RESTART           0x06
#define SIGP_STOP_STORE_STATUS 0x09
#define SIGP_INITIAL_CPU_RESET 0x0b
#define SIGP_CPU_RESET         0x0c
#define SIGP_SET_PREFIX        0x0d
#define SIGP_STORE_STATUS_ADDR 0x0e
#define SIGP_SET_ARCH          0x12

/* cpu status bits */
#define SIGP_STAT_EQUIPMENT_CHECK   0x80000000UL
#define SIGP_STAT_INCORRECT_STATE   0x00000200UL
#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
#define SIGP_STAT_EXT_CALL_PENDING  0x00000080UL
#define SIGP_STAT_STOPPED           0x00000040UL
#define SIGP_STAT_OPERATOR_INTERV   0x00000020UL
#define SIGP_STAT_CHECK_STOP        0x00000010UL
#define SIGP_STAT_INOPERATIVE       0x00000004UL
#define SIGP_STAT_INVALID_ORDER     0x00000002UL
#define SIGP_STAT_RECEIVER_CHECK    0x00000001UL


static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
			unsigned long *reg)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	int rc;

	if (cpu_addr >= KVM_MAX_VCPUS)
		return 3; /* not operational */

	spin_lock(&fi->lock);
	if (fi->local_int[cpu_addr] == NULL)
		rc = 3; /* not operational */
	else if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
		 & CPUSTAT_RUNNING) {
		*reg &= 0xffffffff00000000UL;
		rc = 1; /* status stored */
	} else {
		*reg &= 0xffffffff00000000UL;
		*reg |= SIGP_STAT_STOPPED;
		rc = 1; /* status stored */
	}
	spin_unlock(&fi->lock);

	VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
	return rc;
}

static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	struct kvm_s390_local_interrupt *li;
	struct kvm_s390_interrupt_info *inti;
	int rc;

	if (cpu_addr >= KVM_MAX_VCPUS)
		return 3; /* not operational */

	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	if (!inti)
		return -ENOMEM;

	inti->type = KVM_S390_INT_EMERGENCY;
	inti->emerg.code = vcpu->vcpu_id;

	spin_lock(&fi->lock);
	li = fi->local_int[cpu_addr];
	if (li == NULL) {
		rc = 3; /* not operational */
		kfree(inti);
		goto unlock;
	}
	spin_lock_bh(&li->lock);
	list_add_tail(&inti->list, &li->list);
	atomic_set(&li->active, 1);
	atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
	if (waitqueue_active(&li->wq))
		wake_up_interruptible(&li->wq);
	spin_unlock_bh(&li->lock);
	rc = 0; /* order accepted */
	VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
unlock:
	spin_unlock(&fi->lock);
	return rc;
}

static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	struct kvm_s390_local_interrupt *li;
	struct kvm_s390_interrupt_info *inti;
	int rc;

	if (cpu_addr >= KVM_MAX_VCPUS)
		return 3; /* not operational */

	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	if (!inti)
		return -ENOMEM;

	inti->type = KVM_S390_INT_EXTERNAL_CALL;
	inti->extcall.code = vcpu->vcpu_id;

	spin_lock(&fi->lock);
	li = fi->local_int[cpu_addr];
	if (li == NULL) {
		rc = 3; /* not operational */
		kfree(inti);
		goto unlock;
	}
	spin_lock_bh(&li->lock);
	list_add_tail(&inti->list, &li->list);
	atomic_set(&li->active, 1);
	atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
	if (waitqueue_active(&li->wq))
		wake_up_interruptible(&li->wq);
	spin_unlock_bh(&li->lock);
	rc = 0; /* order accepted */
	VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
unlock:
	spin_unlock(&fi->lock);
	return rc;
}

static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
{
	struct kvm_s390_interrupt_info *inti;

	inti = kzalloc(sizeof(*inti), GFP_ATOMIC);
	if (!inti)
		return -ENOMEM;
	inti->type = KVM_S390_SIGP_STOP;

	spin_lock_bh(&li->lock);
	list_add_tail(&inti->list, &li->list);
	atomic_set(&li->active, 1);
	atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
	li->action_bits |= action;
	if (waitqueue_active(&li->wq))
		wake_up_interruptible(&li->wq);
	spin_unlock_bh(&li->lock);

	return 0; /* order accepted */
}

static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	struct kvm_s390_local_interrupt *li;
	int rc;

	if (cpu_addr >= KVM_MAX_VCPUS)
		return 3; /* not operational */

	spin_lock(&fi->lock);
	li = fi->local_int[cpu_addr];
	if (li == NULL) {
		rc = 3; /* not operational */
		goto unlock;
	}

	rc = __inject_sigp_stop(li, action);

unlock:
	spin_unlock(&fi->lock);
	VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
	return rc;
}

int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action)
{
	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
	return __inject_sigp_stop(li, action);
}

static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
{
	int rc;

	switch (parameter & 0xff) {
	case 0:
		rc = 3; /* not operational */
		break;
	case 1:
	case 2:
		rc = 0; /* order accepted */
		break;
	default:
		rc = -EOPNOTSUPP;
	}
	return rc;
}

static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
			     unsigned long *reg)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	struct kvm_s390_local_interrupt *li = NULL;
	struct kvm_s390_interrupt_info *inti;
	int rc;
	u8 tmp;

	/* make sure that the new value is valid memory */
	address = address & 0x7fffe000u;
	if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
	   copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
		*reg |= SIGP_STAT_INVALID_PARAMETER;
		return 1; /* invalid parameter */
	}

	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	if (!inti)
		return 2; /* busy */

	spin_lock(&fi->lock);
	if (cpu_addr < KVM_MAX_VCPUS)
		li = fi->local_int[cpu_addr];

	if (li == NULL) {
		rc = 1; /* incorrect state */
		*reg &= SIGP_STAT_INCORRECT_STATE;
		kfree(inti);
		goto out_fi;
	}

	spin_lock_bh(&li->lock);
	/* cpu must be in stopped state */
	if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
		rc = 1; /* incorrect state */
		*reg &= SIGP_STAT_INCORRECT_STATE;
		kfree(inti);
		goto out_li;
	}

	inti->type = KVM_S390_SIGP_SET_PREFIX;
	inti->prefix.address = address;

	list_add_tail(&inti->list, &li->list);
	atomic_set(&li->active, 1);
	if (waitqueue_active(&li->wq))
		wake_up_interruptible(&li->wq);
	rc = 0; /* order accepted */

	VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);
out_li:
	spin_unlock_bh(&li->lock);
out_fi:
	spin_unlock(&fi->lock);
	return rc;
}

int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
{
	int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	int r3 = vcpu->arch.sie_block->ipa & 0x000f;
	int base2 = vcpu->arch.sie_block->ipb >> 28;
	int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
	u32 parameter;
	u16 cpu_addr = vcpu->arch.guest_gprs[r3];
	u8 order_code;
	int rc;

	/* sigp in userspace can exit */
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu,
						   PGM_PRIVILEGED_OPERATION);

	order_code = disp2;
	if (base2)
		order_code += vcpu->arch.guest_gprs[base2];

	if (r1 % 2)
		parameter = vcpu->arch.guest_gprs[r1];
	else
		parameter = vcpu->arch.guest_gprs[r1 + 1];

	switch (order_code) {
	case SIGP_SENSE:
		vcpu->stat.instruction_sigp_sense++;
		rc = __sigp_sense(vcpu, cpu_addr,
				  &vcpu->arch.guest_gprs[r1]);
		break;
	case SIGP_EXTERNAL_CALL:
		vcpu->stat.instruction_sigp_external_call++;
		rc = __sigp_external_call(vcpu, cpu_addr);
		break;
	case SIGP_EMERGENCY:
		vcpu->stat.instruction_sigp_emergency++;
		rc = __sigp_emergency(vcpu, cpu_addr);
		break;
	case SIGP_STOP:
		vcpu->stat.instruction_sigp_stop++;
		rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);
		break;
	case SIGP_STOP_STORE_STATUS:
		vcpu->stat.instruction_sigp_stop++;
		rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP);
		break;
	case SIGP_SET_ARCH:
		vcpu->stat.instruction_sigp_arch++;
		rc = __sigp_set_arch(vcpu, parameter);
		break;
	case SIGP_SET_PREFIX:
		vcpu->stat.instruction_sigp_prefix++;
		rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
				       &vcpu->arch.guest_gprs[r1]);
		break;
	case SIGP_RESTART:
		vcpu->stat.instruction_sigp_restart++;
		/* user space must know about restart */
	default:
		return -EOPNOTSUPP;
	}

	if (rc < 0)
		return rc;

	vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
	vcpu->arch.sie_block->gpsw.mask |= (rc & 3ul) << 44;
	return 0;
}
Commit	Line	Data
5288fbf0 CB	1	/*
	2	* sigp.c - handlinge interprocessor communication
	3	*
9ace903d	4	* Copyright IBM Corp. 2008,2009
5288fbf0 CB	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License (version 2 only)
	8	* as published by the Free Software Foundation.
	9	*
	10	* Author(s): Carsten Otte <cotte@de.ibm.com>
	11	* Christian Borntraeger <borntraeger@de.ibm.com>
9ace903d	12	* Christian Ehrhardt <ehrhardt@de.ibm.com>
5288fbf0 CB	13	*/
	14
	15	#include <linux/kvm.h>
	16	#include <linux/kvm_host.h>
5a0e3ad6	17	#include <linux/slab.h>
5288fbf0 CB	18	#include "gaccess.h"
	19	#include "kvm-s390.h"
	20
	21	/* sigp order codes */
	22	#define SIGP_SENSE 0x01
	23	#define SIGP_EXTERNAL_CALL 0x02
	24	#define SIGP_EMERGENCY 0x03
	25	#define SIGP_START 0x04
	26	#define SIGP_STOP 0x05
	27	#define SIGP_RESTART 0x06
	28	#define SIGP_STOP_STORE_STATUS 0x09
	29	#define SIGP_INITIAL_CPU_RESET 0x0b
	30	#define SIGP_CPU_RESET 0x0c
	31	#define SIGP_SET_PREFIX 0x0d
	32	#define SIGP_STORE_STATUS_ADDR 0x0e
	33	#define SIGP_SET_ARCH 0x12
	34
	35	/* cpu status bits */
	36	#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
	37	#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
	38	#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
	39	#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL
	40	#define SIGP_STAT_STOPPED 0x00000040UL
	41	#define SIGP_STAT_OPERATOR_INTERV 0x00000020UL
	42	#define SIGP_STAT_CHECK_STOP 0x00000010UL
	43	#define SIGP_STAT_INOPERATIVE 0x00000004UL
	44	#define SIGP_STAT_INVALID_ORDER 0x00000002UL
	45	#define SIGP_STAT_RECEIVER_CHECK 0x00000001UL
	46
	47
0096369d MS	48	static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
0096369d MS	49	unsigned long *reg)
5288fbf0	50	{
180c12fb	51	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
5288fbf0 CB	52	int rc;
	53
	54	if (cpu_addr >= KVM_MAX_VCPUS)
	55	return 3; /* not operational */
	56
b037a4f3	57	spin_lock(&fi->lock);
5288fbf0 CB	58	if (fi->local_int[cpu_addr] == NULL)
	59	rc = 3; /* not operational */
	60	else if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
	61	& CPUSTAT_RUNNING) {
	62	*reg &= 0xffffffff00000000UL;
	63	rc = 1; /* status stored */
	64	} else {
	65	*reg &= 0xffffffff00000000UL;
	66	*reg \|= SIGP_STAT_STOPPED;
	67	rc = 1; /* status stored */
	68	}
b037a4f3	69	spin_unlock(&fi->lock);
5288fbf0 CB	70
	71	VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
	72	return rc;
	73	}
	74
	75	static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
	76	{
180c12fb CB	77	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	78	struct kvm_s390_local_interrupt *li;
	79	struct kvm_s390_interrupt_info *inti;
5288fbf0 CB	80	int rc;
	81
	82	if (cpu_addr >= KVM_MAX_VCPUS)
	83	return 3; /* not operational */
	84
	85	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	86	if (!inti)
	87	return -ENOMEM;
	88
	89	inti->type = KVM_S390_INT_EMERGENCY;
7697e71f	90	inti->emerg.code = vcpu->vcpu_id;
5288fbf0	91
b037a4f3	92	spin_lock(&fi->lock);
5288fbf0 CB	93	li = fi->local_int[cpu_addr];
	94	if (li == NULL) {
	95	rc = 3; /* not operational */
	96	kfree(inti);
	97	goto unlock;
	98	}
	99	spin_lock_bh(&li->lock);
	100	list_add_tail(&inti->list, &li->list);
	101	atomic_set(&li->active, 1);
	102	atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
	103	if (waitqueue_active(&li->wq))
	104	wake_up_interruptible(&li->wq);
	105	spin_unlock_bh(&li->lock);
	106	rc = 0; /* order accepted */
7697e71f CE	107	VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
	108	unlock:
	109	spin_unlock(&fi->lock);
	110	return rc;
	111	}
	112
	113	static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
	114	{
	115	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	116	struct kvm_s390_local_interrupt *li;
	117	struct kvm_s390_interrupt_info *inti;
	118	int rc;
	119
	120	if (cpu_addr >= KVM_MAX_VCPUS)
	121	return 3; /* not operational */
	122
	123	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	124	if (!inti)
	125	return -ENOMEM;
	126
	127	inti->type = KVM_S390_INT_EXTERNAL_CALL;
	128	inti->extcall.code = vcpu->vcpu_id;
	129
	130	spin_lock(&fi->lock);
	131	li = fi->local_int[cpu_addr];
	132	if (li == NULL) {
	133	rc = 3; /* not operational */
	134	kfree(inti);
	135	goto unlock;
	136	}
	137	spin_lock_bh(&li->lock);
	138	list_add_tail(&inti->list, &li->list);
	139	atomic_set(&li->active, 1);
	140	atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
	141	if (waitqueue_active(&li->wq))
	142	wake_up_interruptible(&li->wq);
	143	spin_unlock_bh(&li->lock);
	144	rc = 0; /* order accepted */
	145	VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
5288fbf0	146	unlock:
b037a4f3	147	spin_unlock(&fi->lock);
5288fbf0 CB	148	return rc;
	149	}
	150
9ace903d	151	static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
5288fbf0	152	{
180c12fb	153	struct kvm_s390_interrupt_info *inti;
5288fbf0	154
9940fa80	155	inti = kzalloc(sizeof(*inti), GFP_ATOMIC);
5288fbf0 CB	156	if (!inti)
5288fbf0 CB	157	return -ENOMEM;
5288fbf0 CB	158	inti->type = KVM_S390_SIGP_STOP;
5288fbf0 CB	159
5288fbf0 CB	160	spin_lock_bh(&li->lock);
	161	list_add_tail(&inti->list, &li->list);
	162	atomic_set(&li->active, 1);
	163	atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
9ace903d	164	li->action_bits \|= action;
5288fbf0 CB	165	if (waitqueue_active(&li->wq))
	166	wake_up_interruptible(&li->wq);
	167	spin_unlock_bh(&li->lock);
9ace903d CE	168
	169	return 0; /* order accepted */
	170	}
	171
	172	static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action)
	173	{
	174	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	175	struct kvm_s390_local_interrupt *li;
	176	int rc;
	177
	178	if (cpu_addr >= KVM_MAX_VCPUS)
	179	return 3; /* not operational */
	180
	181	spin_lock(&fi->lock);
	182	li = fi->local_int[cpu_addr];
	183	if (li == NULL) {
	184	rc = 3; /* not operational */
	185	goto unlock;
	186	}
	187
	188	rc = __inject_sigp_stop(li, action);
	189
5288fbf0	190	unlock:
b037a4f3	191	spin_unlock(&fi->lock);
5288fbf0 CB	192	VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
	193	return rc;
	194	}
	195
9ace903d CE	196	int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action)
	197	{
	198	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
	199	return __inject_sigp_stop(li, action);
	200	}
	201
5288fbf0 CB	202	static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
	203	{
	204	int rc;
	205
	206	switch (parameter & 0xff) {
	207	case 0:
5288fbf0 CB	208	rc = 3; /* not operational */
	209	break;
	210	case 1:
	211	case 2:
	212	rc = 0; /* order accepted */
	213	break;
	214	default:
b8e660b8	215	rc = -EOPNOTSUPP;
5288fbf0 CB	216	}
	217	return rc;
	218	}
	219
	220	static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
0096369d	221	unsigned long *reg)
5288fbf0	222	{
180c12fb	223	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
53cb780a	224	struct kvm_s390_local_interrupt *li = NULL;
180c12fb	225	struct kvm_s390_interrupt_info *inti;
5288fbf0 CB	226	int rc;
	227	u8 tmp;
	228
	229	/* make sure that the new value is valid memory */
	230	address = address & 0x7fffe000u;
092670cd CO	231	if (copy_from_guest_absolute(vcpu, &tmp, address, 1) \|\|
092670cd CO	232	copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
5288fbf0 CB	233	*reg \|= SIGP_STAT_INVALID_PARAMETER;
	234	return 1; /* invalid parameter */
	235	}
	236
	237	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	238	if (!inti)
	239	return 2; /* busy */
	240
b037a4f3	241	spin_lock(&fi->lock);
53cb780a RK	242	if (cpu_addr < KVM_MAX_VCPUS)
53cb780a RK	243	li = fi->local_int[cpu_addr];
5288fbf0	244
53cb780a	245	if (li == NULL) {
5288fbf0 CB	246	rc = 1; /* incorrect state */
	247	*reg &= SIGP_STAT_INCORRECT_STATE;
	248	kfree(inti);
	249	goto out_fi;
	250	}
	251
	252	spin_lock_bh(&li->lock);
	253	/* cpu must be in stopped state */
	254	if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
	255	rc = 1; /* incorrect state */
	256	*reg &= SIGP_STAT_INCORRECT_STATE;
	257	kfree(inti);
	258	goto out_li;
	259	}
	260
	261	inti->type = KVM_S390_SIGP_SET_PREFIX;
	262	inti->prefix.address = address;
	263
	264	list_add_tail(&inti->list, &li->list);
	265	atomic_set(&li->active, 1);
	266	if (waitqueue_active(&li->wq))
	267	wake_up_interruptible(&li->wq);
	268	rc = 0; /* order accepted */
	269
	270	VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);
	271	out_li:
	272	spin_unlock_bh(&li->lock);
	273	out_fi:
b037a4f3	274	spin_unlock(&fi->lock);
5288fbf0 CB	275	return rc;
	276	}
	277
	278	int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
	279	{
	280	int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	281	int r3 = vcpu->arch.sie_block->ipa & 0x000f;
	282	int base2 = vcpu->arch.sie_block->ipb >> 28;
	283	int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
	284	u32 parameter;
	285	u16 cpu_addr = vcpu->arch.guest_gprs[r3];
	286	u8 order_code;
	287	int rc;
	288
3eb77d51 CB	289	/* sigp in userspace can exit */
	290	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
	291	return kvm_s390_inject_program_int(vcpu,
	292	PGM_PRIVILEGED_OPERATION);
	293
5288fbf0 CB	294	order_code = disp2;
	295	if (base2)
	296	order_code += vcpu->arch.guest_gprs[base2];
	297
	298	if (r1 % 2)
	299	parameter = vcpu->arch.guest_gprs[r1];
	300	else
	301	parameter = vcpu->arch.guest_gprs[r1 + 1];
	302
	303	switch (order_code) {
	304	case SIGP_SENSE:
	305	vcpu->stat.instruction_sigp_sense++;
	306	rc = __sigp_sense(vcpu, cpu_addr,
	307	&vcpu->arch.guest_gprs[r1]);
	308	break;
7697e71f CE	309	case SIGP_EXTERNAL_CALL:
	310	vcpu->stat.instruction_sigp_external_call++;
	311	rc = __sigp_external_call(vcpu, cpu_addr);
	312	break;
5288fbf0 CB	313	case SIGP_EMERGENCY:
	314	vcpu->stat.instruction_sigp_emergency++;
	315	rc = __sigp_emergency(vcpu, cpu_addr);
	316	break;
	317	case SIGP_STOP:
	318	vcpu->stat.instruction_sigp_stop++;
9ace903d	319	rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);
5288fbf0 CB	320	break;
	321	case SIGP_STOP_STORE_STATUS:
	322	vcpu->stat.instruction_sigp_stop++;
9ace903d	323	rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP);
5288fbf0 CB	324	break;
	325	case SIGP_SET_ARCH:
	326	vcpu->stat.instruction_sigp_arch++;
	327	rc = __sigp_set_arch(vcpu, parameter);
	328	break;
	329	case SIGP_SET_PREFIX:
	330	vcpu->stat.instruction_sigp_prefix++;
	331	rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
	332	&vcpu->arch.guest_gprs[r1]);
	333	break;
	334	case SIGP_RESTART:
	335	vcpu->stat.instruction_sigp_restart++;
	336	/* user space must know about restart */
	337	default:
b8e660b8	338	return -EOPNOTSUPP;
5288fbf0 CB	339	}
	340
	341	if (rc < 0)
	342	return rc;
	343
	344	vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
	345	vcpu->arch.sie_block->gpsw.mask \|= (rc & 3ul) << 44;
	346	return 0;
	347	}