diff options
Diffstat (limited to 'virt/kvm/arm/vgic.c')
| -rw-r--r-- | virt/kvm/arm/vgic.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 1c3b75eb28f0..2126bf5b0035 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1878,6 +1878,17 @@ static int vgic_vcpu_init_maps(struct kvm_vcpu *vcpu, int nr_irqs) return 0; } +/** + * kvm_vgic_get_max_vcpus - Get the maximum number of VCPUs allowed by HW + * + * The host's GIC naturally limits the maximum amount of VCPUs a guest + * can use. + */ +int kvm_vgic_get_max_vcpus(void) +{ + return vgic->max_gic_vcpus; +} + void kvm_vgic_destroy(struct kvm *kvm) { struct vgic_dist *dist = &kvm->arch.vgic; @@ -2072,6 +2083,8 @@ static void vgic_v2_init_emulation(struct kvm *kvm) dist->vm_ops.add_sgi_source = vgic_v2_add_sgi_source; dist->vm_ops.init_model = vgic_v2_init_model; dist->vm_ops.map_resources = vgic_v2_map_resources; + + kvm->arch.max_vcpus = VGIC_V2_MAX_CPUS; } static int init_vgic_model(struct kvm *kvm, int type) @@ -2084,6 +2097,9 @@ static int init_vgic_model(struct kvm *kvm, int type) return -ENODEV; } + if (atomic_read(&kvm->online_vcpus) > kvm->arch.max_vcpus) + return -E2BIG; + return 0; } |