Re: [Xen-devel] Notes from PCI Passthrough design discussion at Xen Summit

[Manish Jaggi <mjaggi@xxxxxxxxxxxxxxxxxx>]

Hi Roger,

On 7/20/2017 1:54 PM, Roger Pau Monné wrote:
> On Thu, Jul 20, 2017 at 09:24:36AM +0530, Manish Jaggi wrote:
> > Hi Punit,
> >
> > On 7/19/2017 8:11 PM, Punit Agrawal wrote:
> > > I took some notes for the PCI Passthrough design discussion at Xen
> > > Summit. Due to the wide range of topics covered, the notes got sparser
> > > towards the end of the session. I've tried to attribute names against
> > > comments but have very likely got things mixed up. Apologies in advance.
> > Was curious if any discussions happened on the RC Emu (config space
> > emulation) as per slide 18
> > https://schd.ws/hosted_files/xendeveloperanddesignsummit2017/76/slides.pdf
> Part of this is already posted on the list (ATM for x86 only) but the
> PCI specification (and therefore the config space emulation) is not
> tied to any arch:
>
> https://lists.xenproject.org/archives/html/xen-devel/2017-06/msg03698.html
From the summary, I have a  questions on
"
 - Roger: Registering config space with Xen before device discovery
  will allow the hypervisor to set access traps for certain
 functionality as appropriate"

Traps will do emulation or something else ?
 Is the config space emulation only for DomU or it for Dom0 as well ?
Slide 18 shows only for DomU ?

-manish

> Roger.

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