diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-08-06 14:39:54 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-08 20:17:13 -0700 |
| commit | 12daed95faec51a60736776a35ce4b0d1541c346 (patch) | |
| tree | 0782e36a14862cc74a92a21d4d43eef0b110b453 /arch | |
| parent | 3c4ebbcc130dddc5163da41b22aa5bdd08b93308 (diff) | |
KVM: set debug registers after "schedulable" section
(cherry picked from commit 29415c37f043d1d54dcf356601d738ff6633b72b)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -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 5911677d1d7b..1454992e6ace 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2839,10 +2839,6 @@ 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)) @@ -2896,6 +2892,9 @@ 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 @@ -2970,7 +2969,7 @@ out: if (r > 0) { kvm_resched(vcpu); down_read(&vcpu->kvm->slots_lock); - goto preempted; + goto again; } post_kvm_run_save(vcpu, kvm_run); |