Add the new vgic_check_iorange helper that checks that an iorange is
sane: the start address and size have valid alignments, the range is
within the addressable PA range, start+size doesn't overflow, and the
start wasn't already defined.
No functional change.
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211005011921.437353-2-ricarkol@google.com
return 0;
}
+int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr,
+ phys_addr_t addr, phys_addr_t alignment,
+ phys_addr_t size)
+{
+ int ret;
+
+ ret = vgic_check_ioaddr(kvm, &ioaddr, addr, alignment);
+ if (ret)
+ return ret;
+
+ if (!IS_ALIGNED(size, alignment))
+ return -EINVAL;
+
+ if (addr + size < addr)
+ return -EINVAL;
+
+ if (addr + size > kvm_phys_size(kvm))
+ return -E2BIG;
+
+ return 0;
+}
+
static int vgic_check_type(struct kvm *kvm, int type_needed)
{
if (kvm->arch.vgic.vgic_model != type_needed)
int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
phys_addr_t addr, phys_addr_t alignment);
+int vgic_check_iorange(struct kvm *kvm, phys_addr_t ioaddr,
+ phys_addr_t addr, phys_addr_t alignment,
+ phys_addr_t size);
+
void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);