linux-kernel - RE: [PATCH v3 2/3] xen/privcmd: Add IOCTL_PRIVCMD_DM

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Date:   Wed, 15 Feb 2017 09:14:30 +0000
From:   Paul Durrant <Paul.Durrant@...rix.com>
To:     'Stefano Stabellini' <sstabellini@...nel.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
CC:     "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Juergen Gross <jgross@...e.com>
Subject: RE: [PATCH v3 2/3] xen/privcmd: Add IOCTL_PRIVCMD_DM_OP

> -----Original Message-----
> From: Stefano Stabellini [mailto:sstabellini@...nel.org]
> Sent: 14 February 2017 18:39
> To: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: Paul Durrant <Paul.Durrant@...rix.com>; xen-devel@...ts.xenproject.org;
> linux-kernel@...r.kernel.org; Stefano Stabellini <sstabellini@...nel.org>;
> Juergen Gross <jgross@...e.com>
> Subject: Re: [PATCH v3 2/3] xen/privcmd: Add IOCTL_PRIVCMD_DM_OP
> 
> On Tue, 14 Feb 2017, Boris Ostrovsky wrote:
> > On 02/13/2017 12:03 PM, Paul Durrant wrote:
> > > Recently a new dm_op[1] hypercall was added to Xen to provide a
> mechanism
> > > for restricting device emulators (such as QEMU) to a limited set of
> > > hypervisor operations, and being able to audit those operations in the
> > > kernel of the domain in which they run.
> > >
> > > This patch adds IOCTL_PRIVCMD_DM_OP as gateway for
> __HYPERVISOR_dm_op.
> > >
> > > NOTE: There is no requirement for user-space code to bounce data
> through
> > >       locked memory buffers (as with IOCTL_PRIVCMD_HYPERCALL) since
> > >       privcmd has enough information to lock the original buffers
> > >       directly.
> > >
> > > [1] http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=524a98c2
> > >
> > > Signed-off-by: Paul Durrant <paul.durrant@...rix.com>
> >
> >
> > Stefano,
> >
> > Are you OK with ARM changes?
> 
> Yes:
> 
> Acked-by: Stefano Stabellini <sstabellini@...nel.org>
> 
> Thanks for CC'ing me, I missed the patch.
> 

Sorry. My fault for nor re-running get-maintaner.pl after fixing up the ARM build.

  Paul