KVM: make irq ack notifications aware of routing table

IRQ ack notifications assume an identity mapping between pin->gsi,
which might not be the case with, for example, HPET.

Translate before acking.

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

1 files changed, 10 insertions, 3 deletions

diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index a797fa5e6420..7aa5086c8622 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -59,10 +59,19 @@ void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
                         e->set(e, kvm, !!(*irq_state));
 }
 
-void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi)
+void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
 {
+        struct kvm_kernel_irq_routing_entry *e;
         struct kvm_irq_ack_notifier *kian;
         struct hlist_node *n;
+        unsigned gsi = pin;
+
+        list_for_each_entry(e, &kvm->irq_routing, link)
+                if (e->irqchip.irqchip == irqchip &&
+                    e->irqchip.pin == pin) {
+                        gsi = e->gsi;
+                        break;
+                }
 
         hlist_for_each_entry(kian, n, &kvm->arch.irq_ack_notifier_list, link)
                 if (kian->gsi == gsi)
@@ -237,8 +246,6 @@ out:
 #define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq)
 
 #ifdef CONFIG_X86
-#define SELECT_PIC(irq) \
-        ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
 #  define PIC_ROUTING_ENTRY(irq) \
         { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP,  \
           .u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 }