From mboxrd@z Thu Jan 1 00:00:00 1970 From: grant.likely@linaro.org (Grant Likely) Date: Mon, 24 Mar 2014 05:13:41 -0700 Subject: [RFC] ARM VM System Sepcification In-Reply-To: <1395651814.4052.6.camel@dagon.hellion.org.uk> References: <20140226183454.GA14639@cbox> <20140306085213.GU643@mal.justgohome.co.uk> <53185FB9.1040308@redhat.com> <20140307122418.2F2C4C408EC@trevor.secretlab.ca> <20140322122354.7644FC418C4@trevor.secretlab.ca> <1395651814.4052.6.camel@dagon.hellion.org.uk> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Mar 24, 2014 at 2:03 AM, Ian Campbell wrote: > On Sat, 2014-03-22 at 12:23 +0000, Grant Likely wrote: >> 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. yes > 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. yes > 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). yes > Is that right? I'm pretty sure you meant (1), reasonably sure you meant > (2) and not at all sure you meant (3) ;-) > > Ian. >