[mirror_ubuntu-bionic-kernel.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 "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;

	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 */
unlock:
	spin_unlock(&fi->lock);
	VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
	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_KERNEL);
	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_user(&tmp, (void __user *)
		(address + vcpu->arch.sie_block->gmsor) , 1)) ||
	   (copy_from_user(&tmp, (void __user *)(address +
			vcpu->arch.sie_block->gmsor + 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_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>
	17	#include "gaccess.h"
	18	#include "kvm-s390.h"
	19
	20	/* sigp order codes */
	21	#define SIGP_SENSE 0x01
	22	#define SIGP_EXTERNAL_CALL 0x02
	23	#define SIGP_EMERGENCY 0x03
	24	#define SIGP_START 0x04
	25	#define SIGP_STOP 0x05
	26	#define SIGP_RESTART 0x06
	27	#define SIGP_STOP_STORE_STATUS 0x09
	28	#define SIGP_INITIAL_CPU_RESET 0x0b
	29	#define SIGP_CPU_RESET 0x0c
	30	#define SIGP_SET_PREFIX 0x0d
	31	#define SIGP_STORE_STATUS_ADDR 0x0e
	32	#define SIGP_SET_ARCH 0x12
	33
	34	/* cpu status bits */
	35	#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
	36	#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
	37	#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
	38	#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL
	39	#define SIGP_STAT_STOPPED 0x00000040UL
	40	#define SIGP_STAT_OPERATOR_INTERV 0x00000020UL
	41	#define SIGP_STAT_CHECK_STOP 0x00000010UL
	42	#define SIGP_STAT_INOPERATIVE 0x00000004UL
	43	#define SIGP_STAT_INVALID_ORDER 0x00000002UL
	44	#define SIGP_STAT_RECEIVER_CHECK 0x00000001UL
	45
	46
0096369d MS	47	static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
0096369d MS	48	unsigned long *reg)
5288fbf0	49	{
180c12fb	50	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
5288fbf0 CB	51	int rc;
	52
	53	if (cpu_addr >= KVM_MAX_VCPUS)
	54	return 3; /* not operational */
	55
b037a4f3	56	spin_lock(&fi->lock);
5288fbf0 CB	57	if (fi->local_int[cpu_addr] == NULL)
	58	rc = 3; /* not operational */
	59	else if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
	60	& CPUSTAT_RUNNING) {
	61	*reg &= 0xffffffff00000000UL;
	62	rc = 1; /* status stored */
	63	} else {
	64	*reg &= 0xffffffff00000000UL;
	65	*reg \|= SIGP_STAT_STOPPED;
	66	rc = 1; /* status stored */
	67	}
b037a4f3	68	spin_unlock(&fi->lock);
5288fbf0 CB	69
	70	VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
	71	return rc;
	72	}
	73
	74	static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
	75	{
180c12fb CB	76	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	77	struct kvm_s390_local_interrupt *li;
	78	struct kvm_s390_interrupt_info *inti;
5288fbf0 CB	79	int rc;
	80
	81	if (cpu_addr >= KVM_MAX_VCPUS)
	82	return 3; /* not operational */
	83
	84	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	85	if (!inti)
	86	return -ENOMEM;
	87
	88	inti->type = KVM_S390_INT_EMERGENCY;
	89
b037a4f3	90	spin_lock(&fi->lock);
5288fbf0 CB	91	li = fi->local_int[cpu_addr];
	92	if (li == NULL) {
	93	rc = 3; /* not operational */
	94	kfree(inti);
	95	goto unlock;
	96	}
	97	spin_lock_bh(&li->lock);
	98	list_add_tail(&inti->list, &li->list);
	99	atomic_set(&li->active, 1);
	100	atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
	101	if (waitqueue_active(&li->wq))
	102	wake_up_interruptible(&li->wq);
	103	spin_unlock_bh(&li->lock);
	104	rc = 0; /* order accepted */
	105	unlock:
b037a4f3	106	spin_unlock(&fi->lock);
5288fbf0 CB	107	VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
	108	return rc;
	109	}
	110
9ace903d	111	static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
5288fbf0	112	{
180c12fb	113	struct kvm_s390_interrupt_info *inti;
5288fbf0 CB	114
	115	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	116	if (!inti)
	117	return -ENOMEM;
5288fbf0 CB	118	inti->type = KVM_S390_SIGP_STOP;
5288fbf0 CB	119
5288fbf0 CB	120	spin_lock_bh(&li->lock);
	121	list_add_tail(&inti->list, &li->list);
	122	atomic_set(&li->active, 1);
	123	atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
9ace903d	124	li->action_bits \|= action;
5288fbf0 CB	125	if (waitqueue_active(&li->wq))
	126	wake_up_interruptible(&li->wq);
	127	spin_unlock_bh(&li->lock);
9ace903d CE	128
	129	return 0; /* order accepted */
	130	}
	131
	132	static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action)
	133	{
	134	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	135	struct kvm_s390_local_interrupt *li;
	136	int rc;
	137
	138	if (cpu_addr >= KVM_MAX_VCPUS)
	139	return 3; /* not operational */
	140
	141	spin_lock(&fi->lock);
	142	li = fi->local_int[cpu_addr];
	143	if (li == NULL) {
	144	rc = 3; /* not operational */
	145	goto unlock;
	146	}
	147
	148	rc = __inject_sigp_stop(li, action);
	149
5288fbf0	150	unlock:
b037a4f3	151	spin_unlock(&fi->lock);
5288fbf0 CB	152	VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
	153	return rc;
	154	}
	155
9ace903d CE	156	int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action)
	157	{
	158	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
	159	return __inject_sigp_stop(li, action);
	160	}
	161
5288fbf0 CB	162	static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
	163	{
	164	int rc;
	165
	166	switch (parameter & 0xff) {
	167	case 0:
5288fbf0 CB	168	rc = 3; /* not operational */
	169	break;
	170	case 1:
	171	case 2:
	172	rc = 0; /* order accepted */
	173	break;
	174	default:
b8e660b8	175	rc = -EOPNOTSUPP;
5288fbf0 CB	176	}
	177	return rc;
	178	}
	179
	180	static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
0096369d	181	unsigned long *reg)
5288fbf0	182	{
180c12fb	183	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
53cb780a	184	struct kvm_s390_local_interrupt *li = NULL;
180c12fb	185	struct kvm_s390_interrupt_info *inti;
5288fbf0 CB	186	int rc;
	187	u8 tmp;
	188
	189	/* make sure that the new value is valid memory */
	190	address = address & 0x7fffe000u;
f50146bd CO	191	if ((copy_from_user(&tmp, (void __user *)
	192	(address + vcpu->arch.sie_block->gmsor) , 1)) \|\|
	193	(copy_from_user(&tmp, (void __user *)(address +
628eb9b8	194	vcpu->arch.sie_block->gmsor + PAGE_SIZE), 1))) {
5288fbf0 CB	195	*reg \|= SIGP_STAT_INVALID_PARAMETER;
	196	return 1; /* invalid parameter */
	197	}
	198
	199	inti = kzalloc(sizeof(*inti), GFP_KERNEL);
	200	if (!inti)
	201	return 2; /* busy */
	202
b037a4f3	203	spin_lock(&fi->lock);
53cb780a RK	204	if (cpu_addr < KVM_MAX_VCPUS)
53cb780a RK	205	li = fi->local_int[cpu_addr];
5288fbf0	206
53cb780a	207	if (li == NULL) {
5288fbf0 CB	208	rc = 1; /* incorrect state */
	209	*reg &= SIGP_STAT_INCORRECT_STATE;
	210	kfree(inti);
	211	goto out_fi;
	212	}
	213
	214	spin_lock_bh(&li->lock);
	215	/* cpu must be in stopped state */
	216	if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
	217	rc = 1; /* incorrect state */
	218	*reg &= SIGP_STAT_INCORRECT_STATE;
	219	kfree(inti);
	220	goto out_li;
	221	}
	222
	223	inti->type = KVM_S390_SIGP_SET_PREFIX;
	224	inti->prefix.address = address;
	225
	226	list_add_tail(&inti->list, &li->list);
	227	atomic_set(&li->active, 1);
	228	if (waitqueue_active(&li->wq))
	229	wake_up_interruptible(&li->wq);
	230	rc = 0; /* order accepted */
	231
	232	VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);
	233	out_li:
	234	spin_unlock_bh(&li->lock);
	235	out_fi:
b037a4f3	236	spin_unlock(&fi->lock);
5288fbf0 CB	237	return rc;
	238	}
	239
	240	int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
	241	{
	242	int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	243	int r3 = vcpu->arch.sie_block->ipa & 0x000f;
	244	int base2 = vcpu->arch.sie_block->ipb >> 28;
	245	int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
	246	u32 parameter;
	247	u16 cpu_addr = vcpu->arch.guest_gprs[r3];
	248	u8 order_code;
	249	int rc;
	250
3eb77d51 CB	251	/* sigp in userspace can exit */
	252	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
	253	return kvm_s390_inject_program_int(vcpu,
	254	PGM_PRIVILEGED_OPERATION);
	255
5288fbf0 CB	256	order_code = disp2;
	257	if (base2)
	258	order_code += vcpu->arch.guest_gprs[base2];
	259
	260	if (r1 % 2)
	261	parameter = vcpu->arch.guest_gprs[r1];
	262	else
	263	parameter = vcpu->arch.guest_gprs[r1 + 1];
	264
	265	switch (order_code) {
	266	case SIGP_SENSE:
	267	vcpu->stat.instruction_sigp_sense++;
	268	rc = __sigp_sense(vcpu, cpu_addr,
	269	&vcpu->arch.guest_gprs[r1]);
	270	break;
	271	case SIGP_EMERGENCY:
	272	vcpu->stat.instruction_sigp_emergency++;
	273	rc = __sigp_emergency(vcpu, cpu_addr);
	274	break;
	275	case SIGP_STOP:
	276	vcpu->stat.instruction_sigp_stop++;
9ace903d	277	rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);
5288fbf0 CB	278	break;
	279	case SIGP_STOP_STORE_STATUS:
	280	vcpu->stat.instruction_sigp_stop++;
9ace903d	281	rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP);
5288fbf0 CB	282	break;
	283	case SIGP_SET_ARCH:
	284	vcpu->stat.instruction_sigp_arch++;
	285	rc = __sigp_set_arch(vcpu, parameter);
	286	break;
	287	case SIGP_SET_PREFIX:
	288	vcpu->stat.instruction_sigp_prefix++;
	289	rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
	290	&vcpu->arch.guest_gprs[r1]);
	291	break;
	292	case SIGP_RESTART:
	293	vcpu->stat.instruction_sigp_restart++;
	294	/* user space must know about restart */
	295	default:
b8e660b8	296	return -EOPNOTSUPP;
5288fbf0 CB	297	}
	298
	299	if (rc < 0)
	300	return rc;
	301
	302	vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
	303	vcpu->arch.sie_block->gpsw.mask \|= (rc & 3ul) << 44;
	304	return 0;
	305	}