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virtio-vga: fix virtio-vga bar ordering 

With virtio-vga, pci bar are reordered. Bar  is used for compatibility
with stdvga. By default, bar  is used by virtio modern io bar.
This bar is the last one introduce in the virtio pci bar layout and it's
crushed by the virtio-vga reordering. So virtio-vga and
modern-pio-notify are incompatible because virtio-vga failed to
initialize with this option.

This fix sets the modern io bar to the bar  to avoid conflict.

Signed-off-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Message-Id: <20200422215455.10244-1-anthoine.bourgeois@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Anthoine Bourgeois 2020-04-22 23:54:54 +02:00 committed by Michael S. Tsirkin
parent ba480fa626
commit 15138b5e6f
1 changed files with 1 additions and 0 deletions
hw/display
virtio-vga.c

1
hw/display/virtio-vga.c
View File

@ -114,6 +114,7 @@ static void virtio_vga_base_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
*/
vpci_dev->modern_mem_bar_idx = 2;
vpci_dev->msix_bar_idx = 4;
vpci_dev->modern_io_bar_idx = 5;
if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
/*