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Diffstat (limited to 'virt/kvm/arm/vgic.c')
-rw-r--r--virt/kvm/arm/vgic.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 184c6dbd5165..0cc6ab6005a0 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1683,6 +1683,7 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
struct vgic_dist *vgic = &kvm->arch.vgic;
int type_needed;
phys_addr_t *addr_ptr, block_size;
+ phys_addr_t alignment;
mutex_lock(&kvm->lock);
switch (type) {
@@ -1690,22 +1691,26 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
type_needed = KVM_DEV_TYPE_ARM_VGIC_V2;
addr_ptr = &vgic->vgic_dist_base;
block_size = KVM_VGIC_V2_DIST_SIZE;
+ alignment = SZ_4K;
break;
case KVM_VGIC_V2_ADDR_TYPE_CPU:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V2;
addr_ptr = &vgic->vgic_cpu_base;
block_size = KVM_VGIC_V2_CPU_SIZE;
+ alignment = SZ_4K;
break;
#ifdef CONFIG_ARM_GIC_V3
case KVM_VGIC_V3_ADDR_TYPE_DIST:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V3;
addr_ptr = &vgic->vgic_dist_base;
block_size = KVM_VGIC_V3_DIST_SIZE;
+ alignment = SZ_64K;
break;
case KVM_VGIC_V3_ADDR_TYPE_REDIST:
type_needed = KVM_DEV_TYPE_ARM_VGIC_V3;
addr_ptr = &vgic->vgic_redist_base;
block_size = KVM_VGIC_V3_REDIST_SIZE;
+ alignment = SZ_64K;
break;
#endif
default:
@@ -1718,10 +1723,15 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
goto out;
}
- if (write)
- r = vgic_ioaddr_assign(kvm, addr_ptr, *addr, block_size);
- else
+ if (write) {
+ if (!IS_ALIGNED(*addr, alignment))
+ r = -EINVAL;
+ else
+ r = vgic_ioaddr_assign(kvm, addr_ptr, *addr,
+ block_size);
+ } else {
*addr = *addr_ptr;
+ }
out:
mutex_unlock(&kvm->lock);