linux-kernel - Re: [PATCH 10/11] x86/xip: resolve alternative instructions at build

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Message-ID: <20150325084439.GA3291@pd.tnic>
Date:	Wed, 25 Mar 2015 09:44:39 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Jim Kukunas <james.t.kukunas@...ux.intel.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	tom.zanussi@...ux.intel.com,
	Arjan van de Ven <arjan@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>, tglx@...utronix.de,
	mingo@...hat.com, x86@...nel.org
Subject: Re: [PATCH 10/11] x86/xip: resolve alternative instructions at build

On Tue, Mar 24, 2015 at 05:50:49PM -0700, Jim Kukunas wrote:
> XIP isn't a general feature that distros are going to be enabling. It's 
> designed for a very specific usage where people are building very custom
> kernels.

So something very very special which is not going to be enabled on
distros...

But it is touching main x86 code paths a good deal. We should think
about abstracting it out of the way. The current EFI ifdeffery is
already nasty and sprinkling #ifdef CONFIG_XIP_KERNEL in addition is
making it even worse. :/

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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