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authorAvi Kivity <avi@redhat.com>2012-09-20 15:04:41 +0300
committerAvi Kivity <avi@redhat.com>2012-09-20 15:04:41 +0300
commit1d86b5cc4c6d9a1be1458be3701ac9c915a9706f (patch)
tree313fee0269d75f0dd5146762dd32c78b8ced4f75 /virt
parentecba9a52acdf20530d561b7634b80c35c308943a (diff)
parentc5421519f30bd5ed77857a78de6dc8414385e602 (diff)
downloadvexpress-lsk-1d86b5cc4c6d9a1be1458be3701ac9c915a9706f.tar.gz
Merge branch 'queue' into next
* queue: KVM: MMU: Eliminate pointless temporary 'ac' KVM: MMU: Avoid access/dirty update loop if all is well KVM: MMU: Eliminate eperm temporary KVM: MMU: Optimize is_last_gpte() KVM: MMU: Simplify walk_addr_generic() loop KVM: MMU: Optimize pte permission checks KVM: MMU: Update accessed and dirty bits after guest pagetable walk KVM: MMU: Move gpte_access() out of paging_tmpl.h KVM: MMU: Optimize gpte_access() slightly KVM: MMU: Push clean gpte write protection out of gpte_access() KVM: clarify kvmclock documentation KVM: make processes waiting on vcpu mutex killable KVM: SVM: Make use of asm.h KVM: VMX: Make use of asm.h KVM: VMX: Make lto-friendly Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 4fe02d90081..cc3f6dc506e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -131,11 +131,12 @@ bool kvm_is_mmio_pfn(pfn_t pfn)
/*
* Switches to specified vcpu, until a matching vcpu_put()
*/
-void vcpu_load(struct kvm_vcpu *vcpu)
+int vcpu_load(struct kvm_vcpu *vcpu)
{
int cpu;
- mutex_lock(&vcpu->mutex);
+ if (mutex_lock_killable(&vcpu->mutex))
+ return -EINTR;
if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) {
/* The thread running this VCPU changed. */
struct pid *oldpid = vcpu->pid;
@@ -148,6 +149,7 @@ void vcpu_load(struct kvm_vcpu *vcpu)
preempt_notifier_register(&vcpu->preempt_notifier);
kvm_arch_vcpu_load(vcpu, cpu);
put_cpu();
+ return 0;
}
void vcpu_put(struct kvm_vcpu *vcpu)
@@ -1891,7 +1893,9 @@ static long kvm_vcpu_ioctl(struct file *filp,
#endif
- vcpu_load(vcpu);
+ r = vcpu_load(vcpu);
+ if (r)
+ return r;
switch (ioctl) {
case KVM_RUN:
r = -EINVAL;