[PULL 08/21] vfio/igd: Handle x-igd-opregion option in config quirk

["Cédric Le Goater" <clg@redhat.com>]

From: Tomita Moeko <tomitamoeko@gmail.com>

Both enable OpRegion option (x-igd-opregion) and legacy mode require
setting up OpRegion copy for IGD devices. As the config quirk no longer
depends on legacy mode, we can now handle x-igd-opregion option there
instead of in vfio_realize.

Signed-off-by: Tomita Moeko <tomitamoeko@gmail.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Corvin Köhne <c.koehne@beckhoff.com>
Link: https://lore.kernel.org/qemu-devel/20250306180131.32970-9-tomitamoeko@gmail.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/vfio/pci.h |  2 --
 hw/vfio/igd.c | 14 +++++++++-----
 hw/vfio/pci.c |  9 ---------
 3 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index 3e66b19d8f24fd8c0f44ca26d63e511edbc4318a..816bdbf844dc17e7cbac9a6f42daf9a448ab9cc0 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -229,8 +229,6 @@ int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
 
 bool vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp);
 
-bool vfio_pci_igd_setup_opregion(VFIOPCIDevice *vdev, Error **errp);
-
 void vfio_display_reset(VFIOPCIDevice *vdev);
 bool vfio_display_probe(VFIOPCIDevice *vdev, Error **errp);
 void vfio_display_finalize(VFIOPCIDevice *vdev);
diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c
index ee36875310b4728ac0049327a1f71021d5e6f770..12e07517b4a09ef87791acc09f6a6120abf17ae5 100644
--- a/hw/vfio/igd.c
+++ b/hw/vfio/igd.c
@@ -189,7 +189,7 @@ static bool vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
     return true;
 }
 
-bool vfio_pci_igd_setup_opregion(VFIOPCIDevice *vdev, Error **errp)
+static bool vfio_pci_igd_setup_opregion(VFIOPCIDevice *vdev, Error **errp)
 {
     g_autofree struct vfio_region_info *opregion = NULL;
     int ret;
@@ -560,10 +560,8 @@ bool vfio_probe_igd_config_quirk(VFIOPCIDevice *vdev, Error **errp)
             goto error;
         }
 
-        /* Setup OpRegion access */
-        if (!vfio_pci_igd_setup_opregion(vdev, &err)) {
-            goto error;
-        }
+        /* Enable OpRegion quirk */
+        vdev->features |= VFIO_FEATURE_ENABLE_IGD_OPREGION;
 
         /* Setup LPC bridge / Host bridge PCI IDs */
         if (!vfio_pci_igd_setup_lpc_bridge(vdev, &err)) {
@@ -575,6 +573,12 @@ bool vfio_probe_igd_config_quirk(VFIOPCIDevice *vdev, Error **errp)
         goto error;
     }
 
+    /* Setup OpRegion access */
+    if ((vdev->features & VFIO_FEATURE_ENABLE_IGD_OPREGION) &&
+        !vfio_pci_igd_setup_opregion(vdev, errp)) {
+        goto error;
+    }
+
     /*
      * Allow user to override dsm size using x-igd-gms option, in multiples of
      * 32MiB. This option should only be used when the desired size cannot be
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 444a33d94b7ee56311e828f69f29c724b91812c3..e2897bdcd58d092d64689b5921a34c133139b56d 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3140,15 +3140,6 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
         vfio_bar_quirk_setup(vdev, i);
     }
 
-#ifdef CONFIG_VFIO_IGD
-    if (!vdev->igd_opregion &&
-        vdev->features & VFIO_FEATURE_ENABLE_IGD_OPREGION) {
-        if (!vfio_pci_igd_setup_opregion(vdev, errp)) {
-            goto out_unset_idev;
-        }
-    }
-#endif
-
     /* QEMU emulates all of MSI & MSIX */
     if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
         memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
-- 
2.48.1