Local Display Direct Flip Feature Discussion
kraxel at redhat.com
Thu Dec 13 12:33:50 UTC 2018
> The proposed userspace interface:
> Each plane of the vGPU is exposed as a DRM framebuffer object in the
> host-side during the vGPU creation. So host userspace can assign the
> HW display planes to vGPU's planes by using existing DRM/KMS APIs.
Isn't a framebuffer just a gem object with metadata (fourcc, width,
height, stride, ...) attached? So I'm wondering how that works in
detail. What happens on page-flip? Do you make the framebuffer
reference another gem object then? Or do you blit the guest display
to the framebuffer?
What happens when the guest switches the display resolution?
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