From: Yang Zhang <yang.z.zhang@xxxxxxxxx>
Update destination vcpu map when ioapic entry or apic(id, ldr, dfr) is changed
Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
---
virt/kvm/ioapic.c | 40 ++++++++++++++++++++++++++++++++++++++--
1 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 4296116..329efe1 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -87,6 +87,38 @@ static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
return result;
}
+#ifdef CONFIG_X86
+static void rtc_irq_get_dest_vcpu(struct kvm_ioapic *ioapic, int irq)
+{
+ union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];
+ struct kvm_lapic_irq irqe;
+
+ if (irq != 8 || entry->fields.mask)
+ return;
+
+ spin_lock(&ioapic->lock);
+ irqe.dest_id = entry->fields.dest_id;
+ irqe.vector = entry->fields.vector;
+ irqe.dest_mode = entry->fields.dest_mode;
+ irqe.trig_mode = entry->fields.trig_mode;
+ irqe.delivery_mode = entry->fields.delivery_mode << 8;
+ irqe.level = 1;
+ irqe.shorthand = 0;
+
+ bitmap_zero(ioapic->rtc_status.vcpu_map, KVM_MAX_VCPUS);
+
+ kvm_get_dest_vcpu(ioapic->kvm, &irqe, ioapic->rtc_status.vcpu_map);
+ spin_unlock(&ioapic->lock);
+}
+
+#else
+
+static void rtc_irq_get_dest_vcpu(struct kvm_ioapic *ioapic, int irq)
+{
+ return;
+}
+#endif
+
static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
{
union kvm_ioapic_redirect_entry *pent;
@@ -147,9 +179,13 @@ void kvm_scan_ioapic_entry(struct kvm *kvm)
{
struct kvm_ioapic *ioapic = kvm->arch.vioapic;
- if (!kvm_apic_vid_enabled(kvm) || !ioapic)
+ if (!ioapic)
return;
- kvm_make_update_eoibitmap_request(kvm);
+
+ rtc_irq_get_dest_vcpu(ioapic, 8);
+
+ if (kvm_apic_vid_enabled(kvm))
+ kvm_make_update_eoibitmap_request(kvm);
}
static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
--
1.7.1
--
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