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Date: Tue, 27 May 2014 09:23:48 -0400
From: Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH] x86: do not enable efi boot for sgi uv machine
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To: Russ Anderson <rja@sgi.com>
Cc: matt.fleming@intel.com, kexec@lists.infradead.org, horms@verge.net.au, Alex Thorlton <athorlton@sgi.com>, Borislav Petkov <bp@suse.de>, Dave Young <dyoung@redhat.com>

On Fri, May 23, 2014 at 11:19:30AM -0500, Russ Anderson wrote:

[..]
> 
> > Well, we did find the bug in a combined debug session and SGI will be
> > issuing a fix soon. I don't know whether any quirk will be needed for
> > systems which don't have the fix - I guess that's something for SGI
> > people to decide. CCed and leaving in the rest for reference.
> > 
> > @Alex, Russ: this is about using kexec on UEFI boxes.
> 
> Thanks for the heads up.  Our bios made an assumption about
> mapping that was valid with the old mapping scheme but not
> with the new.  Fortunately the fix will work with both old
> and new kernels, so the fix can be added in the next bios
> update.  But we still have to be careful when removing the
> quirk, to avoid someone trying a new kernel with old bios
> and not being able to boot.

Hi,

So is there is a way for kernel to know whether BIOS has fix or not?
IOW, I am wondering how would one remove quirk or how one can be
reasonably sure that kernel is not booting with Old BIOS.

Thanks
Vivek

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