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Re: [Xen-devel] Re: More virtio users
Framebuffer is an interesting one. Virtio doesn't assume shared memory,
so naively the fb you would just send outbufs describing changed memory.
This would work, but describing rectangles is better. A helper might be
the right approach here
Rectangles work just fine for a framebuffer console. They stop working
once you plan to run any graphical stuff such as an X-Server on top of
the framebuffer. Only way to get notified about changes is page faults,
i.e. 4k granularity on the linear framebuffer memory.
Related to Framebuffer is virtual keyboard and virtual mouse (or better
touchscreen), which probably works perfectly fine with virtio. I'd
guess you can even reuse the input layer event struct for the virtio events.
Xen has virtual framebuffer, kbd & mouse, although not (yet?) in the
paravirt_ops patch queue, so there is something you can look at ;)
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