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Re: [Xen-devel] [PATCH 5/7] x86/traps: Lift all non-entrypoint logic in entry_int82() up into C



On Wed, May 03, 2017 at 03:02:25AM -0600, Jan Beulich wrote:
> >>> On 02.05.17 at 20:05, <andrew.cooper3@xxxxxxxxxx> wrote:
> > --- /dev/null
> > +++ b/xen/arch/x86/pv/traps.c
> > @@ -0,0 +1,44 @@
> > +/******************************************************************************
> > + * arch/x86/pv/traps.c
> > + *
> > + * PV low level entry points.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > + * GNU General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU General Public License
> > + * along with this program; If not, see <http://www.gnu.org/licenses/>.
> > + *
> > + * Copyright (c) 2017 Citrix Systems Ltd.
> > + */
> > +
> > +#include <xen/hypercall.h>
> > +
> > +#include <asm/apic.h>
> > +
> > +#ifdef CONFIG_COMPAT
> 
> As expressed before, I disagree to the re-introduction of such
> conditionals in x86 code.
> 

I'm curious to know how the COMPAT interface is treated long term.

I guess you're of the opinion that we should always have them enabled?

Wei.

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