Re: [Xen-devel] [PATCH 10/10] x86/cpuid: Always enable faulting for the control domain

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 20.02.17 at 12:00, <andrew.cooper3@xxxxxxxxxx> wrote:
> The domain builder in libxc no longer depends on leaked CPUID information to
> properly construct HVM domains.  Remove the control domain exclusion.

Am I missing some intermediate step? As long as there's a raw
CPUID invocation in xc_cpuid_x86.c (which is still there in staging
and I don't recall this series removing it) it at least _feels_ unsafe.

Also the change here then results in Dom0 observing different
behavior between faulting-capable and faulting-incapable hosts.
I'm not convinced this is desirable.

Jan


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