Re: [PATCH v2 1/2] KVM: SVM: Move asid to vcpu_svm

[Ashish Kalra]

From: Ashish Kalra <ashish.kalra@xxxxxxx>

This patch breaks SEV guests. 

The patch stores current ASID in struct vcpu_svm and only moves it to VMCB in
svm_vcpu_run(), but by doing so, the ASID allocated for SEV guests and setup 
in vmcb->control.asid by pre_sev_run() gets over-written by this ASID
stored in struct vcpu_svm and hence, VMRUN fails as SEV guest is bound/activated
on a different ASID then the one overwritten in vmcb->control.asid at VMRUN. 

For example, asid#1 was activated for SEV guest and then vmcb->control.asid is
overwritten with asid#0 (svm->asid) as part of this patch in svm_vcpu_run() and
hence VMRUN fails.