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Date: Wed, 11 Jul 2012 12:30:55 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>,
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        Linus Torvalds <torvalds@linux-foundation.org>,
        Russell King <linux@arm.linux.org.uk>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 00/36] AArch64 Linux kernel port
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> What if they add 64-bit ARM support to arch/x86? AFAIK some of the
> machines are going to be basically PCs, including legacy I/O, ACPI
> and UEFI, so they are much closer to that than they are to anything
> in arch/arm. The instruction set of course is different, but you
> already said that this doesn't matter.

ACPI5 doesn't require legacy I/O although I guess as before people will
be reusing x86 components and might do so for hardware reasons.

Alan