virtio-pci: fill VirtIOPCIRegions early.

Initialize the modern bar and the VirtIOPCIRegion fields early, in
realize.  Also add a size field to VirtIOPCIRegion and variables for
pci bars to VirtIOPCIProxy.

This allows virtio-pci subclasses to change things before the
device_plugged callback applies them.  virtio-vga will use that to
arrange regions in a way that virtio-vga is compatible to both stdvga
(in vga mode) and virtio-gpu-pci (in pci mode).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index ea1343ded3..ff5ab71e76 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -94,6 +94,7 @@ typedef struct VirtioPCIClass {
 typedef struct VirtIOPCIRegion {
     MemoryRegion mr;
     uint32_t offset;
+    uint32_t size;
     uint32_t type;
 } VirtIOPCIRegion;
 
@@ -105,6 +106,9 @@ struct VirtIOPCIProxy {
     VirtIOPCIRegion device;
     VirtIOPCIRegion notify;
     MemoryRegion modern_bar;
+    uint32_t legacy_io_bar;
+    uint32_t msix_bar;
+    uint32_t modern_mem_bar;
     uint32_t flags;
     uint32_t class_code;
     uint32_t nvectors;