From c011f4ea106b94e5499358b62d8c2d74f7e184f9 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Tue, 22 May 2018 09:55:14 +0200 Subject: [PATCH] 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 Acked-by: Christoffer Dall Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-init.c | 3 +++ virt/kvm/arm/vgic/vgic-mmio-v3.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index 272af9704952..2673efce65f3 100644 --- a/virt/kvm/arm/vgic/vgic-init.c +++ b/virt/kvm/arm/vgic/vgic-init.c @@ -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); diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c index 3dbc057f861b..1c6c535585e1 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