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Subject: Re: [RFC] KVM: x86: Support KVM VMs sharing SEV context
To:     Ashish Kalra <ashish.kalra@amd.com>,
        Nathan Tempelman <natet@google.com>
Cc:     thomas.lendacky@amd.com, x86@kernel.org, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org, srutherford@google.com,
        seanjc@google.com, rientjes@google.com, brijesh.singh@amd.com
References: <20210224085915.28751-1-natet@google.com>
 <20210305140409.GA2116@ashkalra_ubuntu_server>
From:   Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <ba4121bd-cad7-49f3-d53c-d1b03d95ca39@redhat.com>
Date:   Fri, 5 Mar 2021 16:13:30 +0100
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On 05/03/21 15:04, Ashish Kalra wrote:
>> +	/* Mirrors of mirrors should work, but let's not get silly */
>> +	if (is_mirroring_enc_context(kvm)) {
>> +		ret = -ENOTTY;
>> +		goto failed;
>> +	}
> How will A->B->C->... type of live migration work if mirrors of
> mirrors are not supported ?

Each host would only run one main VM and one mirror, wouldn't it?

Paolo