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Re: [Xen-devel] [PATCHv1 5/5] x86/domctl: Add XEN_DOMCTL_PARAM_ARCH_X86_FIP_WIDTH parameter

>>> On 19.02.16 at 11:05, <david.vrabel@xxxxxxxxxx> wrote:
> On 18/02/16 18:52, David Vrabel wrote:
>> Add a parameter to allow the toolstack to set the x87 FIP width in case
>> the hypervisor's heuristics do the wrong thing.
> I think this would be better as a HVM param since: a) it only needs to
> be changed for HVM guests; b) it would allow the guest agent or OS
> (which may be able to make a better decision) to set it; and c) it can
> be saved/restored across a migrate.

I had wondered namely about a) when seeing patch 1, and I agree
with all of the points made (thus eliminating patches 1 and 2).


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