KVM: arm/arm64: Check vcpu redist base before registering an iodev
As we are going to register several redist regions,
vgic_register_all_redist_iodevs() may be called several times. We need
to register a redist_iodev for a given vcpu only once. So let's
check if the base address has already been set. Initialize this latter
in kvm_vgic_vcpu_init().
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index 3dbc057..1c6c535 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -592,6 +592,9 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu)
gpa_t rd_base, sgi_base;
int ret;
+ if (!IS_VGIC_ADDR_UNDEF(vgic_cpu->rd_iodev.base_addr))
+ return 0;
+
/*
* We may be creating VCPUs before having set the base address for the
* redistributor region, in which case we will come back to this