static void vfio_probe_ati_bar2_quirk(VFIOPCIDevice *vdev, int nr) { VFIOQuirk *quirk; VFIOConfigMirrorQuirk *mirror; /* Only enable on newer devices where BAR2 is 64bit */ if (!vfio_pci_is(vdev, PCI_VENDOR_ID_ATI, PCI_ANY_ID) || !vdev->has_vga || nr != 2 || !vdev->bars[2].mem64) { return; } quirk = g_malloc0(sizeof(*quirk)); mirror = quirk->data = g_malloc0(sizeof(*mirror)); mirror->mem = quirk->mem = g_malloc0(sizeof(MemoryRegion)); quirk->nr_mem = 1; mirror->vdev = vdev; mirror->offset = 0x4000; mirror->bar = nr; memory_region_init_io(mirror->mem, OBJECT(vdev), &vfio_generic_mirror_quirk, mirror, "vfio-ati-bar2-4000-quirk", PCI_CONFIG_SPACE_SIZE); memory_region_add_subregion_overlap(&vdev->bars[nr].region.mem, mirror->offset, mirror->mem, 1); QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); trace_vfio_quirk_ati_bar2_probe(vdev->vbasedev.name); }