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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>
This commit is contained in:
Eric Auger 2018-05-22 09:55:14 +02:00 committed by Marc Zyngier
parent 5ec17fbac6
commit c011f4ea10
2 changed files with 6 additions and 0 deletions
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3
virt/kvm/arm/vgic/vgic-init.c
View File

@ -199,6 +199,9 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
int ret = 0;
int i;
vgic_cpu->rd_iodev.base_addr = VGIC_ADDR_UNDEF;
vgic_cpu->sgi_iodev.base_addr = VGIC_ADDR_UNDEF;
INIT_LIST_HEAD(&vgic_cpu->ap_list_head);
spin_lock_init(&vgic_cpu->ap_list_lock);

3
virt/kvm/arm/vgic/vgic-mmio-v3.c
View File

@ -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