[RFC] ARM VM System Sepcification
Ian.Campbell at citrix.com
Mon Mar 24 06:47:53 EDT 2014
On Mon, 2014-03-24 at 11:41 +0100, Paolo Bonzini wrote:
> 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.
I suppose for completeness I should have had 1a here:
When a VM image is instantiated into a specific VM instance then
it must not expect or require any persistent variables to be
> > 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. :)
You did mean it, or you do think Grant meant it? ;-)
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