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Date: Thu, 17 Sep 2026 16:59:37 +0200
From: =?utf-8?B?SsO2cmcgUsO2ZGVs?= <joro@8bytes.org>
To: Tony Lindgren <tony.lindgren@linux.intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>, 
	Sean Christopherson <seanjc@google.com>, Michael Roth <michael.roth@amd.com>, 
	Liam Merwick <liam.merwick@oracle.com>, Vishal Annapurve <vannapurve@google.com>, 
	Ninad Naik <ninadnaik07@gmail.com>, Joerg Roedel <joerg.roedel@amd.com>, 
	Tom Lendacky <thomas.lendacky@amd.com>, James Bottomley <James.Bottomley@hansenpartnership.com>, 
	kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, 
	linux-kselftest@vger.kernel.org, coconut-svsm@lists.linux.dev
Subject: Re: [PATCH v2 6/8] KVM: SEV: Add SNP vCPU state get and set commands
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References: <20260908103338.427254-1-joro@8bytes.org>
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 <aqksXLLcmFDkM9Xj@tlindgre-MOBL1>
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In-Reply-To: <aquIYzwDOx6jzy3T@tlindgre-MOBL1>

Hi Tony,

On Thu, Sep 17, 2026 at 09:27:47AM +0300, Tony Lindgren wrote:
> Oh OK, so calling for both hypervisor and confidential VCPU state would be
> needed. The difference could be specified in the struct kvm_vcpu_transfer
> flags?

Or hypervisor state is migrated outside of the CVM live migration interface? From QEMUs
perspective it is not different to other state like for emulated devices and
such. Does TDX also have per-cpu hypervisor state that needs to be migrated?

In any case, for SNP this state must be settable from QEMU to correctly support
IGVM loading, so an interface outside of live migration is needed :)

Regards,

	Joerg