The recent changes to emulate string instructions without entering guest
mode exposed a bug where pending interrupts are not properly reflected
in ready_for_interrupt_injection.
The result is that userspace overwrites a previously queued interrupt,
when irqchip's are emulated in qemu.
Fix by always updating state before returning to userspace.
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6b2ce1d..dff08e5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4653,7 +4653,6 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
}
srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
- post_kvm_run_save(vcpu);
vapic_exit(vcpu);
@@ -4703,6 +4702,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct
kvm_run *kvm_run)
r = __vcpu_run(vcpu);
out:
+ post_kvm_run_save(vcpu);
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
--
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