diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-08-01 20:09:13 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:15:19 +0200 |
| commit | 29415c37f043d1d54dcf356601d738ff6633b72b (patch) | |
| tree | 43958b606712801806e0ff8e3da5426b9c66feaf | |
| parent | 8349b5cd816adf102c078553ec8ca63b3beb457c (diff) | |
KVM: set debug registers after "schedulable" section
The vcpu thread can be preempted after the guest_debug_pre() callback,
resulting in invalid debug registers on the new vcpu.
Move it inside the non-preemptable section.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index f1b0223c408..4a033757a19 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3113,10 +3113,6 @@ static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) down_read(&vcpu->kvm->slots_lock); vapic_enter(vcpu); -preempted: - if (vcpu->guest_debug.enabled) - kvm_x86_ops->guest_debug_pre(vcpu); - again: if (vcpu->requests) if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) @@ -3170,6 +3166,9 @@ again: goto out; } + if (vcpu->guest_debug.enabled) + kvm_x86_ops->guest_debug_pre(vcpu); + vcpu->guest_mode = 1; /* * Make sure that guest_mode assignment won't happen after @@ -3244,7 +3243,7 @@ out: if (r > 0) { kvm_resched(vcpu); down_read(&vcpu->kvm->slots_lock); - goto preempted; + goto again; } post_kvm_run_save(vcpu, kvm_run); |