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Subject: Re: [PATCH v3 1/3] Loongson-2F: Flush the branch target history
 such as BTB and RAS
From:   Wu Zhangjin <wuzhangjin@gmail.com>
Reply-To: wuzhangjin@gmail.com
To:     Andreas Barth <aba@not.so.argh.org>
Cc:     Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org
In-Reply-To: <20100402145401.GS27216@mails.so.argh.org>
References: <cover.1268453720.git.wuzhangjin@gmail.com>
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Organization: DSLab, Lanzhou University, China
Date:   Sat, 03 Apr 2010 09:42:55 +0800
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On Fri, 2010-04-02 at 16:54 +0200, Andreas Barth wrote:
> * Wu Zhangjin (wuzhangjin@gmail.com) [100313 05:45]:
> > This patch did clear BTB(branch target buffer), forbid RAS(return
> > address stack) via Loongson-2F's 64bit diagnostic register.
> 
> Unfortunatly the Loongson 2F here still fails with this patch,
> compiled with the new binutils and both options enabled.
> 
> Testcase: plain debian unstable chroot, build binutils in that chroot.
> 
> More ideas, codes, whatever welcome.

Hi,

This patch is not enough, please use the kernel(>=2.6.32) from
http://dev.lemote.com/code/rt4ls or
http://dev.lemote.com/code/linux-loongson-community

Regards,
	Wu Zhangjin