[PATCH v2 2/2] vfio/pci: Remove console drivers
From: Alex Williamson <hidden>
Date: 2022-06-16 20:39:12
Also in:
dri-devel, kvm, linux-doc, lkml
Subsystem:
the rest, vfio driver · Maintainers:
Linus Torvalds, Alex Williamson
Console drivers can create conflicts with PCI resources resulting in userspace getting mmap failures to memory BARs. This is especially evident when trying to re-use the system primary console for userspace drivers. Use the aperture helpers to remove these conflicts. Reported-by: Laszlo Ersek <redacted> Suggested-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Alex Williamson <redacted> --- drivers/vfio/pci/vfio_pci_core.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
index a0d69ddaf90d..5b2a6e9f7cf7 100644
--- a/drivers/vfio/pci/vfio_pci_core.c
+++ b/drivers/vfio/pci/vfio_pci_core.c@@ -10,6 +10,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/aperture.h> #include <linux/device.h> #include <linux/eventfd.h> #include <linux/file.h>
@@ -1793,6 +1794,10 @@ static int vfio_pci_vga_init(struct vfio_pci_core_device *vdev) if (!vfio_pci_is_vga(pdev)) return 0; + ret = remove_conflicting_pci_devices(pdev, vdev->vdev.ops->name); + if (ret) + return ret; + ret = vga_client_register(pdev, vfio_pci_set_decode); if (ret) return ret;