Re: [PATCH v8 18/18] KVM: SVM: Enable SEV live migration feature implicitly on Incoming VM(s).

[Paolo Bonzini]

On 04/12/20 22:46, Ashish Kalra wrote:
> > I would prefer that userspace does this using KVM_SET_MSR instead.
>
> Ok.
>
> But, this is for a VM which has already been migrated based on feature
> support on host and guest and host negotation and enablement of the live
> migration support, so i am assuming that a VM which has already been
> migrated can have this support enabled implicitly for further migration.

It's just that it is a unexpected side effect of 
KVM_SET_PAGE_ENC_BITMAP.  I prefer to have it tied to the more obvious 
KVM_SET_MSR ioctl.

Paolo