On Fri, Mar 15, 2013 at 04:04:59PM +0800, Yang Zhang wrote: > From: Yang Zhang <yang.z.zhang@xxxxxxxxx> > > when virtual interrupt delivery avaliable, register a rtc eoi notifier > to force vmexit when writing eoi for rtc interupt > > Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx> > --- > virt/kvm/ioapic.c | 26 ++++++++++++++++++++++++++ > 1 files changed, 26 insertions(+), 0 deletions(-) > > diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c > index ed6f111..2c6235c 100644 > --- a/virt/kvm/ioapic.c > +++ b/virt/kvm/ioapic.c > @@ -87,6 +87,30 @@ static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic, > return result; > } > > +#ifdef CONFIG_X86 > +static void kvm_rtc_ack_irq(struct kvm_irq_ack_notifier *kian) > +{ > + return; > +} No need to register fake ack notifier to request EOI exit from APICv. IOAPIC can do it directly. > + > +static void rtc_register_notifier(struct kvm_ioapic *ioapic) > +{ > + if (!kvm_apic_vid_enabled(ioapic->kvm)) > + return; > + > + ioapic->rtc_status.irq_ack_notifier.gsi = 8; > + ioapic->rtc_status.irq_ack_notifier.irq_acked = kvm_rtc_ack_irq; > + kvm_register_irq_ack_notifier(ioapic->kvm, > + &ioapic->rtc_status.irq_ack_notifier); > +} > +#else > + > +static void rtc_register_notifier(struct kvm_ioapic *ioapic) > +{ > + return; > +} > +#endif > + > static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx) > { > union kvm_ioapic_redirect_entry *pent; > @@ -458,6 +482,8 @@ int kvm_ioapic_init(struct kvm *kvm) > kfree(ioapic); > } > > + rtc_register_notifier(ioapic); > + > return ret; > } > > -- > 1.7.1 -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html