KVM: arm/arm64: vgic-new: Add GICv3 MMIO handling framework

Create a new file called vgic-mmio-v3.c and describe the GICv3
distributor and redistributor registers there.
This adds a special macro to deal with the split of SGI/PPI in the
redistributor and SPIs in the distributor, which allows us to reuse
the existing GICv2 handlers for those registers which are compatible.
Also we provide a function to deal with the registration of the two
separate redistributor frames per VCPU.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index e57f8d54c792..6742b11ddd91 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -42,6 +42,7 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
+int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address);
 #else
 static inline void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu)
 {
@@ -63,6 +64,12 @@ static inline void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr)
 static inline void vgic_v3_set_underflow(struct kvm_vcpu *vcpu)
 {
 }
+
+static inline int vgic_register_redist_iodevs(struct kvm *kvm,
+					      gpa_t dist_base_address)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif