From: Tomita Moeko <tomitamo...@gmail.com> Check the vendor and device ID on GVT-g mdev to ensure it is a supported device [1]. This extra check is required for automatically enabling OpRegion access later.
Note that Cherryview and Gemini Lake are marked as supported here since current code cannot distinguish them with other Gen8 and Gen9 devices. Since mdev cannot be created on these devices, this has no functional impact. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/i915/intel_gvt.c?h=v6.14#n52 Signed-off-by: Tomita Moeko <tomitamo...@gmail.com> Reviewed-by: Corvin Köhne <c.koe...@beckhoff.com> Reviewed-by: Alex Williamson <alex.william...@redhat.com> Tested-by: Alex Williamson <alex.william...@redhat.com> Link: https://lore.kernel.org/qemu-devel/20250505170305.23622-5-tomitamo...@gmail.com Signed-off-by: Cédric Le Goater <c...@redhat.com> --- hw/vfio/igd.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c index 347253d08ce594d46cafb674ebbd9ca8878200e0..f5dd4750282920a71c52ca59f9ca42899d895c1e 100644 --- a/hw/vfio/igd.c +++ b/hw/vfio/igd.c @@ -672,6 +672,18 @@ error: static bool vfio_pci_kvmgt_config_quirk(VFIOPCIDevice *vdev, Error **errp) { g_autofree struct vfio_region_info *opregion = NULL; + int gen; + + if (!vfio_pci_is(vdev, PCI_VENDOR_ID_INTEL, PCI_ANY_ID) || + !vfio_is_vga(vdev)) { + return true; + } + + /* FIXME: Cherryview is Gen8, but don't support GVT-g */ + gen = igd_gen(vdev); + if (gen != 8 && gen != 9) { + return true; + } if ((vdev->features & VFIO_FEATURE_ENABLE_IGD_OPREGION) && (!vfio_pci_igd_opregion_detect(vdev, &opregion, errp) || -- 2.49.0
