Re: [Xen-devel] [PATCH 06/27] x86/domctl: Make XEN_DOMCTL_set_address_size singleshot

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 04.01.17 at 13:39, <andrew.cooper3@xxxxxxxxxx> wrote:
> Toolstacks (including some out-of-tree ones) use XEN_DOMCTL_set_address_size
> at most once per domain, and it ends up having a destructive effect on the
> available CPUID policy for a domain.
> 
> To avoid ordering issues between altering the policy via domctl, and the
> constructive effects which would have to happen from switching back to 
> native,
> explicitly reject this case.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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