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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 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sun, 27 Aug 2006 14:56:05 -0700 |
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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 write? And as a side note, in SVM, the enable bits in DR7 are cleared on a #VMEXIT. In SVM, DR6 is saved along with DR7 in the VMCB on #VMEXITs. That's what I wanted to check. Thanks! -George _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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