linux-kernel - Re: [Xen-devel] [PATCH v3] p2m: use GNTTABOP_unmap_and

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Message-ID: <1383580147.8826.104.camel@kazak.uk.xensource.com>
Date:	Mon, 4 Nov 2013 15:49:07 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Roger Pau Monne <roger.pau@...rix.com>
CC:	<xen-devel@...ts.xen.org>, <linux-kernel@...r.kernel.org>,
	"Stefano Stabellini" <stefano.stabellini@...citrix.com>,
	David Vrabel <david.vrabel@...rix.com>
Subject: Re: [Xen-devel] [PATCH v3] p2m: use GNTTABOP_unmap_and_duplicate if
 available

On Mon, 2013-11-04 at 16:38 +0100, Roger Pau Monne wrote:
> The new GNTTABOP_unmap_and_duplicate operation 

I don't see this op in mainline Xen anywhere...

Was it part of Stefano's original swiotlb for ARM stuff? If so we've
dropped that approach for ARM and the new solution doesn't require
hypervisor changes so the upstreaming of this hypercall ended, so you'd
have to pick it up and complete that work if you want to use it.

Ian.


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