/*
* sigp.c - handlinge interprocessor communication
*
- * Copyright IBM Corp. 2008
+ * 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)
*
* 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"
#define SIGP_STAT_RECEIVER_CHECK 0x00000001UL
-static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr, u64 *reg)
+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_bh(&fi->lock);
+ 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)
*reg |= SIGP_STAT_STOPPED;
rc = 1; /* status stored */
}
- spin_unlock_bh(&fi->lock);
+ spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
return rc;
inti->type = KVM_S390_INT_EMERGENCY;
- spin_lock_bh(&fi->lock);
+ spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
if (li == NULL) {
rc = 3; /* not operational */
spin_unlock_bh(&li->lock);
rc = 0; /* order accepted */
unlock:
- spin_unlock_bh(&fi->lock);
+ spin_unlock(&fi->lock);
VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
return rc;
}
-static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int store)
+static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
{
- 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_SIGP_STOP;
- spin_lock_bh(&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_STOP_INT, li->cpuflags);
- if (store)
- li->action_bits |= ACTION_STORE_ON_STOP;
- li->action_bits |= ACTION_STOP_ON_STOP;
+ li->action_bits |= action;
if (waitqueue_active(&li->wq))
wake_up_interruptible(&li->wq);
spin_unlock_bh(&li->lock);
- rc = 0; /* order accepted */
+
+ 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_bh(&fi->lock);
+ 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:
- printk(KERN_WARNING "kvm: request to switch to ESA/390 mode"
- " not supported");
rc = 3; /* not operational */
break;
case 1:
rc = 0; /* order accepted */
break;
default:
- rc = -ENOTSUPP;
+ rc = -EOPNOTSUPP;
}
return rc;
}
static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
- u64 *reg)
+ unsigned long *reg)
{
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li;
+ 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(vcpu, &tmp,
- (u64) (address + vcpu->kvm->arch.guest_origin) , 1)) ||
- (copy_from_guest(vcpu, &tmp, (u64) (address +
- vcpu->kvm->arch.guest_origin + PAGE_SIZE), 1))) {
+ 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 */
}
if (!inti)
return 2; /* busy */
- spin_lock_bh(&fi->lock);
- li = fi->local_int[cpu_addr];
+ spin_lock(&fi->lock);
+ if (cpu_addr < KVM_MAX_VCPUS)
+ li = fi->local_int[cpu_addr];
- if ((cpu_addr >= KVM_MAX_VCPUS) || (li == NULL)) {
+ if (li == NULL) {
rc = 1; /* incorrect state */
*reg &= SIGP_STAT_INCORRECT_STATE;
kfree(inti);
out_li:
spin_unlock_bh(&li->lock);
out_fi:
- spin_unlock_bh(&fi->lock);
+ spin_unlock(&fi->lock);
return rc;
}
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];
break;
case SIGP_STOP:
vcpu->stat.instruction_sigp_stop++;
- rc = __sigp_stop(vcpu, cpu_addr, 0);
+ 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, 1);
+ rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP);
break;
case SIGP_SET_ARCH:
vcpu->stat.instruction_sigp_arch++;
vcpu->stat.instruction_sigp_restart++;
/* user space must know about restart */
default:
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
}
if (rc < 0)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff