Re: [virtio-dev] Re: [PATCH] Add virtio gpu driver.

  Hi,

Absolutely, it's pretty common to mix regions in a BAR.
For example, we have virtio kick (ioeventfd backed,
handled in kernel) in same BAR as common and device
specific configuration.

We did the same thing you are now doing with the
virtio BAR, and now we have to maintain two code
bases, virtio pci config was designed to be future proof
so why not use it?

It's not about virtio at all.  It's about vga compatibility, so we have
a simple framebuffer as boot display.  Only used when virtio is *not*
enabled.

This is mostly just making sure we don't paint ourselves into a corner.

It's a simple memory bar.  vga cards have that since pci was invented
(standalone ones, chipset graphics aside), and there havn't been
fundamental changes ...

cheers,
  Gerd


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