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Date:   Sat, 9 May 2020 21:21:25 +0200
From:   Pavel Machek <>
To:     "Paraschiv, Andra-Irina" <>
Cc:     Paolo Bonzini <>,,
        Anthony Liguori <>,
        Benjamin Herrenschmidt <>,
        Colm MacCarthaigh <>,
        Bjoern Doebel <>,
        David Woodhouse <>,
        Frank van der Linden <>,
        Alexander Graf <>,
        Martin Pohlack <>,
        Matt Wilson <>, Balbir Singh <>,
        Stewart Smith <>,
        Uwe Dannowski <>,,
Subject: Re: [PATCH v1 00/15] Add support for Nitro Enclaves

On Fri 2020-05-08 10:00:27, Paraschiv, Andra-Irina wrote:
> On 07/05/2020 20:44, Pavel Machek wrote:
> >
> >Hi!
> >
> >>>it uses its own memory and CPUs + its virtio-vsock emulated device for
> >>>communication with the primary VM.
> >>>
> >>>The memory and CPUs are carved out of the primary VM, they are dedicated
> >>>for the enclave. The Nitro hypervisor running on the host ensures memory
> >>>and CPU isolation between the primary VM and the enclave VM.
> >>>
> >>>These two components need to reflect the same state e.g. when the
> >>>enclave abstraction process (1) is terminated, the enclave VM (2) is
> >>>terminated as well.
> >>>
> >>>With regard to the communication channel, the primary VM has its own
> >>>emulated virtio-vsock PCI device. The enclave VM has its own emulated
> >>>virtio-vsock device as well. This channel is used, for example, to fetch
> >>>data in the enclave and then process it. An application that sets up the
> >>>vsock socket and connects or listens, depending on the use case, is then
> >>>developed to use this channel; this happens on both ends - primary VM
> >>>and enclave VM.
> >>>
> >>>Let me know if further clarifications are needed.
> >>Thanks, this is all useful.  However can you please clarify the
> >>low-level details here?
> >Is the virtual machine manager open-source? If so, I guess pointer for sources
> >would be useful.
> Hi Pavel,
> Thanks for reaching out.
> The VMM that is used for the primary / parent VM is not open source.

Do we want to merge code that opensource community can not test?


-- (english) (cesky, pictures)

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