KVM: arm/arm64: vgic-new: implement mapped IRQ handling

We now store the mapped hardware IRQ number in our struct, so we
don't need the irq_phys_map for the new VGIC.
Implement the hardware IRQ mapping on top of the reworked arch
timer interface.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c
index 331885528ead..69b61abefa19 100644
--- a/virt/kvm/arm/vgic/vgic.c
+++ b/virt/kvm/arm/vgic/vgic.c
@@ -312,6 +312,47 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
         return vgic_update_irq_pending(kvm, cpuid, intid, level, false);
 }
 
+int kvm_vgic_inject_mapped_irq(struct kvm *kvm, int cpuid, unsigned int intid,
+                               bool level)
+{
+        return vgic_update_irq_pending(kvm, cpuid, intid, level, true);
+}
+
+int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, u32 virt_irq, u32 phys_irq)
+{
+        struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
+
+        BUG_ON(!irq);
+
+        spin_lock(&irq->irq_lock);
+
+        irq->hw = true;
+        irq->hwintid = phys_irq;
+
+        spin_unlock(&irq->irq_lock);
+
+        return 0;
+}
+
+int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq)
+{
+        struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
+
+        BUG_ON(!irq);
+
+        if (!vgic_initialized(vcpu->kvm))
+                return -EAGAIN;
+
+        spin_lock(&irq->irq_lock);
+
+        irq->hw = false;
+        irq->hwintid = 0;
+
+        spin_unlock(&irq->irq_lock);
+
+        return 0;
+}
+
 /**
  * vgic_prune_ap_list - Remove non-relevant interrupts from the list
  *
@@ -564,3 +605,15 @@ void vgic_kick_vcpus(struct kvm *kvm)
                         kvm_vcpu_kick(vcpu);
         }
 }
+
+bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq)
+{
+        struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
+        bool map_is_active;
+
+        spin_lock(&irq->irq_lock);
+        map_is_active = irq->hw && irq->active;
+        spin_unlock(&irq->irq_lock);
+
+        return map_is_active;
+}