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authorAvi Kivity <avi@qumranet.com>2007-11-07 17:14:18 +0200
committerAvi Kivity <avi@qumranet.com>2007-11-08 12:05:43 +0200
commit56ba47ddbd5af7918bf1acdbe3deb979d0dcd64b (patch)
tree791ae295a0cb48c82aa66ad3aaf0485cf5853185 /drivers/kvm
parent70433389ccfe2719ef5cd539d04172260294f0f5 (diff)
KVM: SVM: Defer nmi processing until switch to host state is complete
If we stgi() too soon, nmis can reach the processor even though interrupts are disabled, catching it in a half-switched state. Delay the stgi() until we're done switching. Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm')
-rw-r--r--drivers/kvm/svm.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 3910358db79..7376805c88a 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -1585,10 +1585,6 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
#endif
: "cc", "memory" );
- local_irq_disable();
-
- stgi();
-
if ((svm->vmcb->save.dr7 & 0xff))
load_db_regs(svm->host_db_regs);
@@ -1605,6 +1601,10 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
reload_tss(vcpu);
+ local_irq_disable();
+
+ stgi();
+
svm->next_rip = 0;
}