diff options
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 2f865d07df90..7053110e4734 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -37,8 +37,23 @@ module_param_named(nointxmask, nointxmask, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(nointxmask, "Disable support for PCI 2.3 style INTx masking. If this resolves problems for specific devices, report lspci -vvvxxx to linux-pci@vger.kernel.org so the device can be fixed automatically via the broken_intx_masking flag."); +#ifdef CONFIG_VFIO_PCI_VGA +static bool disable_vga; +module_param(disable_vga, bool, S_IRUGO); +MODULE_PARM_DESC(disable_vga, "Disable VGA resource access through vfio-pci"); +#endif + static DEFINE_MUTEX(driver_lock); +static inline bool vfio_vga_disabled(void) +{ +#ifdef CONFIG_VFIO_PCI_VGA + return disable_vga; +#else + return true; +#endif +} + static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev); static int vfio_pci_enable(struct vfio_pci_device *vdev) @@ -93,10 +108,8 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev) } else vdev->msix_bar = 0xFF; -#ifdef CONFIG_VFIO_PCI_VGA - if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) + if (!vfio_vga_disabled() && (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) vdev->has_vga = true; -#endif return 0; } |