On Fri, Mar 15, 2013 at 04:04:59PM +0800, Yang Zhang wrote:
> From: Yang Zhang <[email protected]>
>
> when virtual interrupt delivery avaliable, register a rtc eoi notifier
> to force vmexit when writing eoi for rtc interupt
>
> Signed-off-by: Yang Zhang <[email protected]>
> ---
> 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.
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