Re: Half a usb-redir idea

[Philippe Mathieu-Daudé]

On 3/16/21 6:21 PM, Dr. David Alan Gilbert wrote:
> Hi,
>   I've got a half-baked idea, which I thought might be worth mentioning.
> 
> How hard would it be to give qemu a usbredir server rather than client?
> It would have nothing guest visible but would look logically like the
> front (?) half of a usb interface; then you could use all of the
> existing qemu emulated and passthrough device code, to build a usb
> hierarchy and present it to a remote qemu.
> 
> You'd get the ability to do emulated USB CDROM/storage, audio, network
> and the glue for host USB connection (and smart cards??) - all in one
> client that you can then use for connecting to a remote qemu.
> 
> The next step of that is to make something analogous to a
> qemu-storage-daemon, but for USB, so you have something that can
> do all that USB stuff without actually having any processors.
> 
> The even crazier step would then be to add a VNC client, and then you
> have an almost complete remote client.

Similarly to the out-of-process feature (on the same host)?
Are you also interested in remote use (different host)?

What about DMA accesses?