[Qemu-devel] [RFC 6/6] vfio: Setup IGD stolen memory under secondary mode

[Zhi Wang <zhi.a.wang@intel.com>]

Also setup IGD stolen memory under secondary mode as some HW functions
might need the stolen memory anyway.

Suggested-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
---
 hw/vfio/pci-quirks.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index abfcec6..6ddb59a 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -1196,16 +1196,11 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr)
     Error *err = NULL;
 
     /*
-     * This must be an Intel VGA device at address 00:02.0 for us to even
-     * consider enabling legacy mode.  The vBIOS has dependencies on the
-     * PCI bus address.
+     * This must be an Intel VGA device.
      */
     if (!vfio_pci_is(vdev, PCI_VENDOR_ID_INTEL, PCI_ANY_ID) ||
-        !vfio_is_vga(vdev) || nr != 4 ||
-        &vdev->pdev != pci_find_device(pci_device_root_bus(&vdev->pdev),
-                                       0, PCI_DEVFN(0x2, 0))) {
+        !vfio_is_vga(vdev) || nr != 4)
         return;
-    }
 
     /*
      * IGD is not a standard, they like to change their specs often.  We
@@ -1251,6 +1246,15 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr)
     pci_set_long(vdev->emulated_config_bits + IGD_BDSM, ~0);
 
     /*
+     * This must be an Intel VGA device at address 00:02.0 for us to even
+     * consider enabling legacy mode.  The vBIOS has dependencies on the
+     * PCI bus address.
+     */
+    if (&vdev->pdev != pci_find_device(pci_device_root_bus(&vdev->pdev),
+                0, PCI_DEVFN(0x2, 0)))
+        return;
+
+    /*
      * We need to create an LPC/ISA bridge at PCI bus address 00:1f.0 that we
      * can stuff host values into, so if there's already one there and it's not
      * one we can hack on, legacy mode is no-go.  Sorry Q35.
-- 
2.7.4