linux-kernel - Re: boot-time vtpm helper (was "Re: <void>")

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Message-ID: <4150bf8c-7321-0dab-ab54-dca7d54c1f3d@linux.ibm.com>
Date:   Thu, 3 Aug 2023 08:46:52 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>,
        linux-integrity@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Jason Gunthorpe <jgg@...pe.ca>
Subject: Re: boot-time vtpm helper (was "Re: <void>")



On 8/3/23 05:06, Jarkko Sakkinen wrote:
> On Thu Aug 3, 2023 at 11:25 AM EEST, Jarkko Sakkinen wrote:
>> Hi,
>>
>> I have a working PoC for boot-time initialization of vtpm inside
>> tpm_vtpm_proxy. ATM, it uses the Linux firmware interface to load a ELF
>> binary for the vtpm, and delivers a communication end for the helper
>> process.
>>
>> It is a great feature with the current narrow scope for continuous
>> integration. Obviously the scope could be later on extended to e.g.

Since VMs with vTPMs exist, which CI/CD environment would one use this in?

Where does the binary for the vtpm live when it's loaded with the firmware interface?

>> from unencrypted plain text to a vTPM living inside SGX enclave.

I would run swtpm inside an SGX enclave using Gramine.

Regards,
    Stefan

>>
>> I could send an RFC of this, if there is wider interest for the
>> topic.
>>
>> BR, Jarkko
> 
> I'm sorry, I'm trying learn aerc, and unfortunately forgot to add a subject.
> 
> BR, Jarkko