linux-kernel - Re: [PATCH v1 00/15] Add support for Nitro Enclaves

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Date:   Thu, 7 May 2020 19:44:38 +0200
From:   Pavel Machek <pavel@....cz>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     "Paraschiv, Andra-Irina" <andraprs@...zon.com>,
        linux-kernel@...r.kernel.org,
        Anthony Liguori <aliguori@...zon.com>,
        Benjamin Herrenschmidt <benh@...zon.com>,
        Colm MacCarthaigh <colmmacc@...zon.com>,
        Bjoern Doebel <doebel@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Frank van der Linden <fllinden@...zon.com>,
        Alexander Graf <graf@...zon.de>,
        Martin Pohlack <mpohlack@...zon.de>,
        Matt Wilson <msw@...zon.com>, Balbir Singh <sblbir@...zon.com>,
        Stewart Smith <trawets@...zon.com>,
        Uwe Dannowski <uwed@...zon.de>, kvm@...r.kernel.org,
        ne-devel-upstream@...zon.com
Subject: Re: [PATCH v1 00/15] Add support for Nitro Enclaves

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.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html