Re: [PATCH v2 00/21] KVM: x86: Event/exception fixes and cleanups

[Maxim Levitsky]

On Wed, 2022-07-06 at 13:11 -0700, Jim Mattson wrote:
> On Wed, Jul 6, 2022 at 10:52 AM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
> 
> > Hmm, I'm not entirely convinced that Intel doesn't interpret "internal to the
> > processor" as "undocumented SMRAM fields".  But I could also be misremembering
> > the SMI flows.
> 
> Start using reserved SMRAM, and you will regret it when the vendor
> assigns some new bit of state to the same location.
> 
This is true to some extent, but our SMRAM layout doesn't follow the
spec anyway. This is the reason I asked (I posted an RFC as a good citizen),
in the first place all of you, if you prefer SMRAM or KVM internal state.

Anyway if this is a concern, I can just save the interrupt shadow in KVM,
and migrate it, its not hard, in fact the v1 of my patches did exactly that.

Paolo, what should I do?

Best regards,
	Maxim Levitsky