lkml.org 
[lkml]   [2018]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC 0/4] Virtio uses DMA API for all devices
On Tue, Aug 07, 2018 at 05:52:12AM +1000, Benjamin Herrenschmidt wrote:
> > It is your job to write a coherent interface specification that does
> > not depend on the used components. The hypervisor might be PAPR,
> > Linux + qemu, VMware, Hyperv or something so secret that you'd have
> > to shoot me if you had to tell me. The guest might be Linux, FreeBSD,
> > AIX, OS400 or a Hipster project of the day in Rust. As long as we
> > properly specify the interface it simplify does not matter.
>
> That's the point Christoph. The interface is today's interface. It does
> NOT change. That information is not part of the interface.
>
> It's the VM itself that is stashing away its memory in a secret place,
> and thus needs to do bounce buffering. There is no change to the virtio
> interface per-se.

Any guest that doesn't know about your magic limited adressing is simply
not going to work, so we need to communicate that fact.

\
 
 \ /
  Last update: 2018-08-07 08:23    [W:0.208 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site