Messages in this thread | | | Subject | Re: [PATCH v6 2/5] KVM: x86: Add IBPB support | From | David Woodhouse <> | Date | Fri, 02 Feb 2018 20:31:27 +0000 |
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On Fri, 2018-02-02 at 15:28 -0500, Konrad Rzeszutek Wilk wrote: > > > > > No. The AMD feature bits give us more fine-grained support for exposing > > IBPB or IBRS alone, so we expose those bits on Intel too. > > But but.. that runs smack against the idea of exposing a platform that > is as close to emulating the real hardware as possible. > > As in I would never expect an Intel CPU to expose the IBPB on the 0x8000_0008 > leaf. Hence KVM (nor any hypervisor) should not do it either. > > Unless Intel is doing it? Did I miss a new spec update?
Are you telling me there's no way you can infer from CPUID that you're running in a hypervisor?[unhandled content-type:application/x-pkcs7-signature] | |