Messages in this thread | | | Subject | Re: [virtio-dev] Re: [PATCH] Add virtio gpu driver. | From | Gerd Hoffmann <> | Date | Thu, 26 Mar 2015 12:38:43 +0100 |
| |
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
| |