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;
+}
+
+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
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