Hi Gerd, so I have a bit of a conflict I'm not sure how best to handle between how vgabios.c locates its LFB and how virtio requires the BAR get laid out.
So virtio-pci requires the BARs are laid out for MSI support with the config i/o ports at BAR 0, and MSI BAR at BAR 1. Now the vgabios.c does a check of bar 0 and bar 1 to see if they are 0xfff1 masked, this protects against the the i/o bar but fails to protect against the LFB one as PCI BARs don't encode the size just the base address, and a 4k BAR can be aligned to a larger size. So even if I expand the vgabios.c current code to check for a potential BAR2 it'll fail if the BAR1 gets aligned to something better than the 4k is requires. The correct way to size BARs is to store the old value, write 0xffffffff and see how many bits stick, then write back the old value. Any ideas? I seem to remember vgabios.c had a hack in the past for vmware, but I'm not sure. Dave.
