linux-kernel - Re: [PATCH 6/6] xen: x86 pvh: use XENMEM_add_to_physmap

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Message-ID: <1350544809.28188.5.camel@dagon.hellion.org.uk>
Date:	Thu, 18 Oct 2012 08:20:09 +0100
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Mukesh Rathor <mukesh.rathor@...cle.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>
Subject: Re: [PATCH 6/6] xen: x86 pvh: use XENMEM_add_to_physmap_range for
 foreign gmfn mappings

On Thu, 2012-10-18 at 00:57 +0100, Mukesh Rathor wrote:
> On Wed, 17 Oct 2012 12:32:12 +0100
> Ian Campbell <ian.campbell@...rix.com> wrote:
> 
> > Squeezing the necessary fields into the existing XENMEM_add_to_physmap
> > interface was proving to be a bit tricky so we have decided to go with
> > a new interface upstream (the XENMAPSPACE_gmfn_foreign interface using
> > XENMEM_add_to_physmap was never committed anywhere). This interface
> > also allows for batching which was impossible to support at the same
> > time as foreign mfns in the old interface.
> > 
> > This reverts the relevant parts of "PVH: basic and header changes,
> > elfnote changes, ..." and followups and trivially converts
> > pvh_add_to_xen_p2m over.
> 
> 
> Hmm... I don't see xen side implementation of XENMEM_add_to_physmap_range,

I said in the 0/6 patch, but should have repeated here:

        The final patch requires that XENMEM_add_to_physmap_range be implemented
        for x86 on the hypervisor side. For inspiration the ARM version can be
        found at <1350314444-17148-1-git-send-email-ian.campbell@...rix.com>
        (and will likely be in xen-unstable soon).

In the end I checked it in yesterday.

> and since I've already got my patches tested and cut, I'm going to send
> them now. We can apply this change easily in konrad's tree.

Sure, no problem.

Ian.


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