linux-kernel - Re: [GIT PULL] x86/kaslr for v3.14

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Message-ID: <52F56A40.60707@zytor.com>
Date:	Fri, 07 Feb 2014 15:20:32 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Dave Young <dyoung@...hat.com>, Vivek Goyal <vgoyal@...hat.com>
CC:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Kees Cook <keescook@...omium.org>,
	Cong Ding <dinggnu@...il.com>,
	Richard Weinberger <richard.weinberger@...il.com>,
	Kexec Mailing List <kexec@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Michael Davidson <md@...gle.com>,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	Thomas Gleixner <tglx@...utronix.de>,
	Yinghai Lu <yinghai@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [GIT PULL] x86/kaslr for v3.14

On 02/07/2014 03:16 PM, Dave Young wrote:
> 
> Hi Vivek,
> 
> Chaowang <chaowang@...hat.com> is looking into passing setup_data SETUP_E820_EXT
> instead of using exactmap. Previously Thomas Renninger tried passing them in e820.
> I did not find the old thread, but I remember it's not enough because of the
> 128 entries limitation. 
> 

THERE IS NO SUCH LIMITATION.

Only 128 slots fit in struct boot_params, but additional entries can be
added to the setup_data linked list.

	-hpa

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