KVM: Call kvm_apic_match_dest() to check destination vcpu

For a given vcpu, kvm_apic_match_dest() will tell you whether
the vcpu in the destination list quickly. Drop kvm_calculate_eoi_exitmap()
and use kvm_apic_match_dest() instead.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 5ba005c00e2f..914cbe027d06 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -124,7 +124,6 @@ void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
 {
         struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;
         union kvm_ioapic_redirect_entry *e;
-        struct kvm_lapic_irq irqe;
         int index;
 
         spin_lock(&ioapic->lock);
@@ -135,11 +134,9 @@ void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
                         (e->fields.trig_mode == IOAPIC_LEVEL_TRIG ||
                          kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC,
                                  index))) {
-                        irqe.dest_id = e->fields.dest_id;
-                        irqe.vector = e->fields.vector;
-                        irqe.dest_mode = e->fields.dest_mode;
-                        irqe.delivery_mode = e->fields.delivery_mode << 8;
-                        kvm_calculate_eoi_exitmap(vcpu, &irqe, eoi_exit_bitmap);
+                        if (kvm_apic_match_dest(vcpu, NULL, 0,
+                                e->fields.dest_id, e->fields.dest_mode))
+                                __set_bit(e->fields.vector, (unsigned long *)eoi_exit_bitmap);
                 }
         }
         spin_unlock(&ioapic->lock);