From 8bb808cea3016c11c39e6c7f40a2f772e2eed3fe Mon Sep 17 00:00:00 2001 From: Kevin Tian Date: Thu, 18 Dec 2025 08:16:50 +0000 Subject: [PATCH] vfio/pci: Disable qword access to the VGA region Seems no reason to allow qword access to the old VGA resource. Better restrict it to dword access as before. Suggested-by: Alex Williamson Signed-off-by: Kevin Tian Link: https://lore.kernel.org/r/20251218081650.555015-3-kevin.tian@intel.com Signed-off-by: Alex Williamson --- drivers/vfio/pci/vfio_pci_rdwr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c index 25380b7dfe18..b38627b35c35 100644 --- a/drivers/vfio/pci/vfio_pci_rdwr.c +++ b/drivers/vfio/pci/vfio_pci_rdwr.c @@ -363,7 +363,7 @@ ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf, * to the memory enable bit in the command register. */ done = vfio_pci_core_do_io_rw(vdev, false, iomem, buf, off, count, - 0, 0, iswrite, VFIO_PCI_IO_WIDTH_8); + 0, 0, iswrite, VFIO_PCI_IO_WIDTH_4); vga_put(vdev->pdev, rsrc);