KVM: Move apic timer migration away from critical section
Migrating the apic timer in the critical section is not very nice, and is
absolutely horrible with the real-time port. Move migration to the regular
vcpu execution path, triggered by a new bitflag.
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f0493e7..8f94a0b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2518,13 +2518,16 @@
if (unlikely(r))
goto out;
- if (vcpu->requests)
+ if (vcpu->requests) {
+ if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
+ __kvm_migrate_apic_timer(vcpu);
if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
&vcpu->requests)) {
kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS;
r = 0;
goto out;
}
+ }
kvm_inject_pending_timer_irqs(vcpu);