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KVM: s390: Centrally lock arch specific vcpu ioctls 

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2010-05-13 12:21:46 +03:00
parent 526b78ad1a
commit bc923cc93b
1 changed files with 17 additions and 23 deletions
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40
arch/s390/kvm/kvm-s390.c
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@ -363,9 +363,7 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
{
vcpu_load(vcpu);
kvm_s390_vcpu_initial_reset(vcpu);
vcpu_put(vcpu);
return 0;
}
@ -415,14 +413,12 @@ static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
{
int rc = 0;
vcpu_load(vcpu);
if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING)
rc = -EBUSY;
else {
vcpu->run->psw_mask = psw.mask;
vcpu->run->psw_addr = psw.addr;
}
vcpu_put(vcpu);
return rc;
}
@ -573,7 +569,7 @@ static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from,
* KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
* KVM_S390_STORE_STATUS_PREFIXED: -> prefix
*/
int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
{
const unsigned char archmode = 1;
int prefix;
@ -635,45 +631,43 @@ int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
return 0;
}
static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
{
int rc;
vcpu_load(vcpu);
rc = __kvm_s390_vcpu_store_status(vcpu, addr);
vcpu_put(vcpu);
return rc;
}
long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
struct kvm_vcpu *vcpu = filp->private_data;
void __user *argp = (void __user *)arg;
long r;
switch (ioctl) {
case KVM_S390_INTERRUPT: {
if (ioctl == KVM_S390_INTERRUPT) {
struct kvm_s390_interrupt s390int;
if (copy_from_user(&s390int, argp, sizeof(s390int)))
return -EFAULT;
return kvm_s390_inject_vcpu(vcpu, &s390int);
}
vcpu_load(vcpu);
switch (ioctl) {
case KVM_S390_STORE_STATUS:
return kvm_s390_vcpu_store_status(vcpu, arg);
r = kvm_s390_vcpu_store_status(vcpu, arg);
break;
case KVM_S390_SET_INITIAL_PSW: {
psw_t psw;
r = -EFAULT;
if (copy_from_user(&psw, argp, sizeof(psw)))
return -EFAULT;
return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
break;
r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
break;
}
case KVM_S390_INITIAL_RESET:
return kvm_arch_vcpu_ioctl_initial_reset(vcpu);
r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
break;
default:
;
r = -EINVAL;
}
return -EINVAL;
vcpu_put(vcpu);
return r;
}
/* Section: memory related */