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Re: [Xen-devel] [PATCH][SVM][1/2] fix SVM 64bit hv cores>0 reboot/hang i

To: "Woller, Thomas" <thomas.woller@xxxxxxx>
Subject: Re: [Xen-devel] [PATCH][SVM][1/2] fix SVM 64bit hv cores>0 reboot/hang issue
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Thu, 4 May 2006 21:15:56 +0100
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On 4 May 2006, at 19:30, Woller, Thomas wrote:

You probably need to worry about fs and gs as well. They're
not causing you problems now because guests don't usually set
those registers to non-zero values, but if they ever do then
you'll presumably have problems?
Just to be clear here, the host registers are what is giving us
problems. When the microcode loads the host selectors in the vmexit
microcode logic, then the consistency check fails on ds,es (0x2B)
due to GDT entries not in memory at that moment.

I think that we'll go with not modifying gs,fs now - they are currently
NULL in the host context.

Okay, I think you're right. I'll apply the patch.

 -- Keir

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