Re: Requirements for out-of-process device emulation

[Stefan Hajnoczi]

The call is starting now!  Sorry, I forgot to send this to qemu-devel.

Stefan

On Tue, Jan 14, 2020 at 11:50 AM Stefan Hajnoczi <address@hidden> wrote:
>
> Hi,
> In today's KVM Community Call we will discuss multi-process QEMU and
> related topics (muser and VFIO).
>
> I wanted to share requirements that I've gathered from our previous 
> discussions:
>  * Multiple bus types - new bus types can be added in the future.
>  * Security - VMM does not trust the device emulation process and vice versa.
>  * Unprivileged operation - QEMU and the device emulation process can
> be launched without root privileges.
>  * Live migration - saving device state and restoring it.
>  * Recovery - the device emulation process can be restarted after a
> crash without the guest's knowledge.
>  * vIOMMU - address translation and the ability to expose only a
> subset of guest RAM to the device emulation process.
>  * Portability - works across host OSes
>
> Following the VFIO API closely seems attractive to avoid reinventing the 
> wheel.
>
> Stefan