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Re: [Xen-devel] resume of HVM guest without PV drivers

To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel] resume of HVM guest without PV drivers
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 07 Aug 2009 12:32:29 +0100
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On 07/08/2009 12:23, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

>> Won't you always have a race between checking for migration and then
>> entering the cpu-specific hypercall stub?
> Indeed. However, the fixup handler in this case can be trivial - it just
> needs to restart the whole operation (including the have-I-been-resumed
> check).

Mmm fair enough, if you're prepared to make your own VMCALL/VMMCALL stubs
(which seems safe enough) that you know how to unroll from then that could

 -- Keir

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