Re: [PATCH 4/4] x86,module: Detect CRn and DRn manipulation

[Jan Kiszka]

On 08.04.20 11:04, Paolo Bonzini wrote:
> On 08/04/20 10:58, Jan Kiszka wrote:
> > > Why not contribute the Jailhouse loader into Linux?
> >
> > Definitely planned. But right now it would add the burden of managing
> > the interface between loader and hypervisor carefully. Currently it is
> > internal to Jailhouse and maintained in lock-step, without any backward
> > compatibility.
>
> How often does that change?

Not often, but right now we are at a critical point, starting to explore 
booting Jailhouse before Linux [1]. That may actually help to settle the 
interface and move things forward.

Another to-do is overcoming the need for having to map the hypervisor at 
a fixed location into the kernel address space. Not needed on arm64, 
still required on 32-bit ARM (well...) and x86 (more important). I would 
dislike pushing such legacy to upstream.

Jan

[1] 
https://www.mail-archive.com/jailhouse-dev@xxxxxxxxxxxxxxxx/msg08389.html

--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux