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authorMarcelo Tosatti <mtosatti@redhat.com>2008-09-08 15:23:48 -0300
committerAvi Kivity <avi@qumranet.com>2008-10-15 10:15:26 +0200
commitd76901750ab9f71091d33ef3d2b5909d8a9a4ad4 (patch)
treee4a7ac912c70a05e4c8ee4e7294d9add48383fc2 /virt
parenta6a3034cb979b1fa3948d8e1e91b2387fc66b89b (diff)
downloadlinux-d76901750ab9f71091d33ef3d2b5909d8a9a4ad4.tar.gz
KVM: x86: do not execute halted vcpus
Offline or uninitialized vcpu's can be executed if requested to perform userspace work. Follow Avi's suggestion to handle halted vcpu's in the main loop, simplifying kvm_emulate_halt(). Introduce a new vcpu->requests bit to indicate events that promote state from halted to running. Also standardize vcpu wake sites. Signed-off-by: Marcelo Tosatti <mtosatti <at> redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index de3b029f6ad..63e661be040 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -980,12 +980,12 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
for (;;) {
prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE);
- if (kvm_cpu_has_interrupt(vcpu))
- break;
- if (kvm_cpu_has_pending_timer(vcpu))
- break;
- if (kvm_arch_vcpu_runnable(vcpu))
+ if (kvm_cpu_has_interrupt(vcpu) ||
+ kvm_cpu_has_pending_timer(vcpu) ||
+ kvm_arch_vcpu_runnable(vcpu)) {
+ set_bit(KVM_REQ_UNHALT, &vcpu->requests);
break;
+ }
if (signal_pending(current))
break;