xen, gfx passthrough: retrieve VGA BIOS to work

Now we retrieve VGA bios like kvm stuff in qemu but we need to
fix Device Identification in case if its not matched with the
real IGD device since Seabios is always trying to compare this
ID to work out VGA BIOS.

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index 42380c3976..15b02cbd98 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -725,6 +725,16 @@ static int xen_pt_initfn(PCIDevice *d)
     s->memory_listener = xen_pt_memory_listener;
     s->io_listener = xen_pt_io_listener;
 
+    /* Setup VGA bios for passthrough GFX */
+    if ((s->real_device.domain == 0) && (s->real_device.bus == 0) &&
+        (s->real_device.dev == 2) && (s->real_device.func == 0)) {
+        if (xen_pt_setup_vga(s, &s->real_device) < 0) {
+            XEN_PT_ERR(d, "Setup VGA BIOS of passthrough GFX failed!\n");
+            xen_host_pci_device_put(&s->real_device);
+            return -1;
+        }
+    }
+
     /* Handle real device's MMIO/PIO BARs */
     xen_pt_register_regions(s, &cmd);