Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Sat, 9 May 2020 21:21:25 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     "Paraschiv, Andra-Irina" <andraprs@amazon.com>
Cc:     Paolo Bonzini <pbonzini@redhat.com>, linux-kernel@vger.kernel.org,
        Anthony Liguori <aliguori@amazon.com>,
        Benjamin Herrenschmidt <benh@amazon.com>,
        Colm MacCarthaigh <colmmacc@amazon.com>,
        Bjoern Doebel <doebel@amazon.de>,
        David Woodhouse <dwmw@amazon.co.uk>,
        Frank van der Linden <fllinden@amazon.com>,
        Alexander Graf <graf@amazon.de>,
        Martin Pohlack <mpohlack@amazon.de>,
        Matt Wilson <msw@amazon.com>, Balbir Singh <sblbir@amazon.com>,
        Stewart Smith <trawets@amazon.com>,
        Uwe Dannowski <uwed@amazon.de>, kvm@vger.kernel.org,
        ne-devel-upstream@amazon.com
Subject: Re: [PATCH v1 00/15] Add support for Nitro Enclaves
Message-ID: <20200509192125.GA1597@bug>
References: <20200421184150.68011-1-andraprs@amazon.com>
 <18406322-dc58-9b59-3f94-88e6b638fe65@redhat.com>
 <ff65b1ed-a980-9ddc-ebae-996869e87308@amazon.com>
 <2a4a15c5-7adb-c574-d558-7540b95e2139@redhat.com>
 <20200507174438.GB1216@bug>
 <620bf5ae-eade-37da-670d-a8704d9b4397@amazon.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <620bf5ae-eade-37da-670d-a8704d9b4397@amazon.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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?

								Pavel

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