Commit abd9dda914 for qemu.org

commit abd9dda914eac1fdcf21ce9b3ddd79ebe0172db2
Author: Corvin Köhne <corvin.koehne@gmail.com>
Date:   Wed Aug 28 15:43:23 2024 +0200

    vfio/igd: support legacy mode for all known generations

    We're soon going to add support for legacy mode to ElkhartLake and
    TigerLake devices. Those are gen 11 and 12 devices. At the moment, all
    devices identified by our igd_gen function do support legacy mode. This
    won't change when adding our new devices of gen 11 and 12. Therefore, it
    makes more sense to accept legacy mode for all known devices instead of
    maintaining a long list of known good generations. If we add a new
    generation to igd_gen which doesn't support legacy mode for some reason,
    it'll be easy to advance the check to reject legacy mode for this
    specific generation.

    Signed-off-by: Corvin Köhne <c.koehne@beckhoff.com>
    Reviewed-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c
index 650a323dda..d5e57656a8 100644
--- a/hw/vfio/igd.c
+++ b/hw/vfio/igd.c
@@ -416,7 +416,7 @@ void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr)
      * devices maintain compatibility with generation 8.
      */
     gen = igd_gen(vdev);
-    if (gen != 6 && gen != 8) {
+    if (gen == -1) {
         error_report("IGD device %s is unsupported in legacy mode, "
                      "try SandyBridge or newer", vdev->vbasedev.name);
         return;