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virtio-vga: adapt to page-per-vq=off 

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1473319012-27560-1-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2016-09-08 09:16:52 +02:00
parent 597966d110
commit c2843e9390
1 changed files with 11 additions and 0 deletions
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11
hw/display/virtio-vga.c
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@ -122,6 +122,17 @@ static void virtio_vga_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
*/
vpci_dev->modern_mem_bar = 2;
vpci_dev->msix_bar = 4;
if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
/*
* with page-per-vq=off there is no padding space we can use
* for the stdvga registers. Make the common and isr regions
* smaller then.
*/
vpci_dev->common.size /= 2;
vpci_dev->isr.size /= 2;
}
offset = memory_region_size(&vpci_dev->modern_bar);
offset -= vpci_dev->notify.size;
vpci_dev->notify.offset = offset;