linux-kernel - Re: [PATCH v5 2/7] efi: Introduce EFI_NO

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Message-ID: <alpine.DEB.2.02.1406181523340.13771@kaball.uk.xensource.com>
Date:	Wed, 18 Jun 2014 15:30:25 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Jan Beulich <JBeulich@...e.com>
CC:	Matt Fleming <matt@...sole-pimps.org>,
	Daniel Kiper <daniel.kiper@...cle.com>,
	<andrew.cooper3@...rix.com>, <david.vrabel@...rix.com>,
	<ian.campbell@...rix.com>, <stefano.stabellini@...citrix.com>,
	<jeremy@...p.org>, <matt.fleming@...el.com>, <x86@...nel.org>,
	<tglx@...utronix.de>, <xen-devel@...ts.xenproject.org>,
	<boris.ostrovsky@...cle.com>, <konrad.wilk@...cle.com>,
	<eshelton@...ox.com>, <mingo@...hat.com>, <mjg59@...f.ucam.org>,
	<linux-efi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<hpa@...or.com>
Subject: Re: [PATCH v5 2/7] efi: Introduce EFI_NO_DIRECT flag

On Wed, 18 Jun 2014, Jan Beulich wrote:
> >>> On 18.06.14 at 15:52, <matt@...sole-pimps.org> wrote:
> > EFI_PARAVIRT will be usable by architectures other than x86, correct? If
> > your intention is for it only ever to be used by x86, then it should
> > probably be EFI_ARCH_2.
> 
> I would expect ARM, once it gets UEFI support on the Xen side, to
> be able to handle most of this identically to x86. Which raises the
> question whether most of the new Xen-specific code (in one of the
> other patches) wouldn't better live under drivers/xen/.

I was thinking the same thing.

However this patch series doesn't add much code outside
drivers/xen/efi.c and include/xen/interface/platform.h.
I think it wouldn't be fair to ask Daniel to refactor the efi code
currently under arch/x86 to an arch-independent location.
Whoever comes in later and adds EFI Xen support for ARM can do that.
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