Re: [Xen-devel] [PATCH] Check AMD SYSCFG DramModEn bit for MTRR configuration

[Anish Patel <anish.mailing.list@xxxxxxxxx>]

Buggy BIOSes are more common than you think.  especially from small 
shops, and some times they don't tend to release BIOS updates for their 
platforms.


On 03/02/11 02:01, Keir Fraser wrote:
> On 01/03/2011 21:11, "Wei Huang"<wei.huang2@xxxxxxx>  wrote:
>
> > This patch checks whether SYSCFG DramModEn bit is clear by BIOS. Some
> > buggy BIOS might set this bit to 1, which causes unexpected behavior on
> > AMD platforms. This patch also increase family check for AMD CPUs when
> > setting fixed MTRR ranges.
> How common are these buggy BIOSes? Can't we just get users to update their
> BIOS?
>
>   -- Keir
>
> > Signed-off-by: Wei Huang<wei.huang2@xxxxxxx>
> >
> >
> > PS: If OK, please apply it to both xen-4.1 and xen-4.0 trees.
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
>
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