From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [Question] Switching VCPU CPL from the hypervisor ?
Date: Wed, 16 Dec 2015 18:48:38 +0100
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To: Hebbal Yacine <y_hebbal@esi.dz>
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On 15/12/2015 18:02, Hebbal Yacine wrote:
> What I want to do is: when a controlled process is in user mode, i
> change its cpl to 0, force it to execute a code that is injected in the
> VM, set back its cpl to 3 and let it run like if nothing happened

Could you inject an SMI and place your code in the guest firmware's SMM
handler?  What input is needed by this CPL=0 code?

Paolo