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virtio-vga: fix virtio-vga bar ordering 

With virtio-vga, pci bar are reordered. Bar #2 is used for compatibility
with stdvga. By default, bar #2 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 #5 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
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1
hw/display/virtio-vga.c
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@ -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)) {
/*