From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [RFC] ARM VM System Sepcification
Date: Mon, 24 Mar 2014 11:41:56 +0100
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Cc: Christoffer Dall <christoffer.dall@linaro.org>,
	cross-distro@lists.linaro.org,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	Michael Casadevall <Michael.casadevall@linaro.org>,
	Peter Maydell <peter.maydell@linaro.org>,
	Jordan Justen <jljusten@gmail.com>,
	Rob Herring <rob.herring@linaro.org>, xen-devel@lists.xen.org,
	Stefano Stabellini <stefano.stabellini@citrix.com>,
	"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
	Laszlo Ersek <lersek@redhat.com>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
To: Ian Campbell <Ian.Campbell@citrix.com>,
	Grant Likely <grant.likely@linaro.org>
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Il 24/03/2014 10:03, Ian Campbell ha scritto:
>> > That isn't actually my position. I absolutely think that VMs /should/
>> > implement persistent variables, but the variables are a property of a VM
>> > instance, not of the disk image. As far as this spec is concerned, I
>> > think portable disk images should operate under the assumption of an
>> > empty set of variables, and therefore follow the removable disk
>> > requirements in the UEFI spec.
> Just to be sure I understand. You position is:
>      1. A VM image downloaded from www.distro.org should neither contain
>         nor expect any persistent variables to be present.
>      2. After a VM image is instantiated into a specific VM instance and
>         booted then it is at liberty to set persistent variables (either
>         on first boot or as part of an upgrade) and the VM should ensure
>         that those variables a retained over reboot for that specific
>         instance.
>      3. If a VM does not preserve those variables then the instance
>         should have some sane functional fallback (implied by the
>         removable disk requirements from the UEFI spec).
>
> Is that right? I'm pretty sure you meant (1), reasonably sure you meant
> (2) and not at all sure you meant (3) ;-)

At least I do. :)

Paolo