On Tue, Feb 20, 2024 at 12:59:26PM +0530, ankita@xxxxxxxxxx wrote: > diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c > index 1cbc990d42e0..c93bea18fc4b 100644 > --- a/drivers/vfio/pci/vfio_pci_core.c > +++ b/drivers/vfio/pci/vfio_pci_core.c > @@ -1862,8 +1862,24 @@ int vfio_pci_core_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma > /* > * See remap_pfn_range(), called from vfio_pci_fault() but we can't > * change vm_flags within the fault handler. Set them now. > + * > + * VM_ALLOW_ANY_UNCACHED: The VMA flag is implemented for ARM64, > + * allowing KVM stage 2 device mapping attributes to use Normal-NC > + * rather than DEVICE_nGnRE, which allows guest mappings > + * supporting combining attributes (WC). ARM does not Nitpick: "supporting write-combining" (if you plan to respin). -- Catalin
