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Re: [Xen-devel] [PATCH] Lazy save/restore of SVM debug registers

To: "Travis Betak" <travis.betak@xxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Lazy save/restore of SVM debug registers
From: "George Dunlap " <dunlapg@xxxxxxxxx>
Date: Sun, 27 Aug 2006 17:55:43 -0400
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On 8/27/06, Travis Betak <travis.betak@xxxxxxx> wrote:
Hi, George,

On Sat, 26 Aug 2006, George Dunlap  wrote:

> Hey Travis -- two questions:
> *  This is a safe operation? All debug registers from the guest are
> turned off before entering the hypervisor?

I don't quite follow although there probably is something that's not
qutie right.  Which part are you referring to?  After the initial DR

And as a side note, in SVM, the enable bits in DR7 are cleared on a

In SVM, DR6 is saved along with DR7 in the VMCB on #VMEXITs.

That's what I wanted to check.  Thanks!

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