linux-kernel - Re: [PATCH v2 1/3] x86, boot: add mmio serial during compressed boot

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Message-ID: <51E5C38D.1090201@zytor.com>
Date:	Tue, 16 Jul 2013 15:05:01 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Kees Cook <keescook@...omium.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rob Landley <rob@...dley.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH v2 1/3] x86, boot: add mmio serial during compressed boot

On 07/16/2013 02:03 PM, Yinghai Lu wrote:
> 
> Other way could be:
> 
> Detect if it get into misc.c directly from
> arch/x86/boot/compressed/head_64.S::startup_64. that is from 64bit
> bootloader.
> 
> others go through startup_32 should be 32bit bootloader.
> 
> If it with 64bit boot loader path, You can skip parsing mmio in
> misc.c::console_init() calling.
> 

Don't hack around it when we can do it right.

	-hpa


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