diff options
| author | Alex Williamson <alex.williamson@redhat.com> | 2022-06-22 16:01:34 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-06-27 11:10:32 +0200 |
| commit | d173780620792c725506b0f3c5ec52c7fbac1db0 (patch) | |
| tree | 5d804018bd50de1a3af398b2f52dce9c78fa87e9 /drivers/vfio/pci/vfio_pci_core.c | |
| parent | 7283f862bd991c8657e9bf1c02db772fcf018f13 (diff) | |
| download | linux-d173780620792c725506b0f3c5ec52c7fbac1db0.tar.bz2 | |
vfio/pci: Remove console drivers
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.
v3:
* call aperture_remove_conflicting_pci_devices()
Reported-by: Laszlo Ersek <lersek@redhat.com>
Suggested-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220622140134.12763-4-tzimmermann@suse.de
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_core.c')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index a0d69ddaf90d..756d049bd9cf 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 = aperture_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; |