KVM: ioapic/msi interrupt delivery consolidation

ioapic_deliver() and kvm_set_msi() have code duplication. Move
the code into ioapic_deliver_entry() function and call it from
both places.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 3 insertions, 29 deletions

diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 325c6685f206..35397a569b24 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -43,12 +43,11 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
         return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
 }
 
-void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
+void kvm_get_intr_delivery_bitmask(struct kvm *kvm,
                                    union kvm_ioapic_redirect_entry *entry,
                                    unsigned long *deliver_bitmask)
 {
         int i;
-        struct kvm *kvm = ioapic->kvm;
         struct kvm_vcpu *vcpu;
 
         bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
@@ -90,7 +89,7 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
         switch (entry->fields.delivery_mode) {
         case IOAPIC_LOWEST_PRIORITY:
                 /* Select one in deliver_bitmask */
-                vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm,
+                vcpu = kvm_get_lowest_prio_vcpu(kvm,
                                 entry->fields.vector, deliver_bitmask);
                 bitmap_zero(deliver_bitmask, KVM_MAX_VCPUS);
                 if (!vcpu)
@@ -111,13 +110,7 @@ void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
 static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
                        struct kvm *kvm, int level)
 {
-        int vcpu_id, r = -1;
-        struct kvm_vcpu *vcpu;
-        struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
         union kvm_ioapic_redirect_entry entry;
-        DECLARE_BITMAP(deliver_bitmask, KVM_MAX_VCPUS);
-
-        BUG_ON(!ioapic);
 
         entry.bits = 0;
         entry.fields.dest_id = (e->msi.address_lo &
@@ -133,26 +126,7 @@ static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
                         (unsigned long *)&e->msi.data);
 
         /* TODO Deal with RH bit of MSI message address */
-
-        kvm_get_intr_delivery_bitmask(ioapic, &entry, deliver_bitmask);
-
-        if (find_first_bit(deliver_bitmask, KVM_MAX_VCPUS) >= KVM_MAX_VCPUS) {
-                printk(KERN_WARNING "kvm: no destination for MSI delivery!");
-                return -1;
-        }
-        while ((vcpu_id = find_first_bit(deliver_bitmask,
-                                        KVM_MAX_VCPUS)) < KVM_MAX_VCPUS) {
-                __clear_bit(vcpu_id, deliver_bitmask);
-                vcpu = ioapic->kvm->vcpus[vcpu_id];
-                if (vcpu) {
-                        if (r < 0)
-                                r = 0;
-                        r += kvm_apic_set_irq(vcpu, entry.fields.vector,
-                                              entry.fields.dest_mode,
-                                              entry.fields.trig_mode);
-                }
-        }
-        return r;
+        return ioapic_deliver_entry(kvm, &entry);
 }
 
 /* This should be called with the kvm->lock mutex held