Re: [PATCH RESEND v4 5/9] KVM: VMX: Add init/set/get functions for SPP

From: Jim Mattson
Date: Fri Aug 16 2019 - 14:20:00 EST

On Fri, Aug 16, 2019 at 6:29 AM Yang Weijiang <weijiang.yang@xxxxxxxxx> wrote:

> Thanks Jim and Sean! Could we add a new flag in kvm to identify if nested VM is on
> or off? That would make things easier. When VMLAUNCH is trapped,
> set the flag, if VMXOFF is trapped, clear the flag.

KVM_GET_NESTED_STATE has the requested information. If
data.vmx.vmxon_pa is anything other than -1, then the vCPU is in VMX
operation. If (flags & KVM_STATE_NESTED_GUEST_MODE), then L2 is