+ David H On Thu, Feb 08, 2024 at 02:16:52AM +0530, ankita@xxxxxxxxxx wrote: > From: Ankit Agrawal <ankita@xxxxxxxxxx> > > The code to map the MMIO in S2 as NormalNC is enabled when conveyed > that the device is WC safe using a new flag VM_VFIO_ALLOW_WC. > > Make vfio-pci set the VM_VFIO_ALLOW_WC flag. > > This could be extended to other devices in the future once that > is deemed safe. > > Signed-off-by: Ankit Agrawal <ankita@xxxxxxxxxx> > Suggested-by: Catalin Marinas <catalin.marinas@xxxxxxx> > Acked-by: Jason Gunthorpe <jgg@xxxxxxxxxx> > --- > drivers/vfio/pci/vfio_pci_core.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c > index 1cbc990d42e0..c3f95ec7fc3a 100644 > --- a/drivers/vfio/pci/vfio_pci_core.c > +++ b/drivers/vfio/pci/vfio_pci_core.c > @@ -1863,7 +1863,8 @@ 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_flags_set(vma, VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP); > + vm_flags_set(vma, VM_VFIO_ALLOW_WC | VM_IO | VM_PFNMAP | > + VM_DONTEXPAND | VM_DONTDUMP); > vma->vm_ops = &vfio_pci_mmap_ops; > > return 0; Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
