xen, gfx passthrough: basic graphics passthrough support

basic gfx passthrough support:
- add a vga type for gfx passthrough
- register/unregister legacy VGA I/O ports and MMIOs for passthrough GFX

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
index ed5fcaec0d..42380c3976 100644
--- a/hw/xen/xen_pt.c
+++ b/hw/xen/xen_pt.c
@@ -502,6 +502,7 @@ static int xen_pt_register_regions(XenPCIPassthroughState *s, uint16_t *cmd)
                    d->rom.size, d->rom.base_addr);
     }
 
+    xen_pt_register_vga_regions(d);
     return 0;
 }
 
@@ -801,6 +802,7 @@ out:
 static void xen_pt_unregister_device(PCIDevice *d)
 {
     XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
+    XenHostPCIDevice *host_dev = &s->real_device;
     uint8_t machine_irq = s->machine_irq;
     uint8_t intx = xen_pt_pci_intx(s);
     int rc;
@@ -844,6 +846,8 @@ static void xen_pt_unregister_device(PCIDevice *d)
     /* delete all emulated config registers */
     xen_pt_config_delete(s);
 
+    xen_pt_unregister_vga_regions(host_dev);
+
     memory_listener_unregister(&s->memory_listener);
     memory_listener_unregister(&s->io_listener);