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Re: [Xen-devel] Uniform commands for booting xen

From: Jan Beulich
Subject: Re: [Xen-devel] Uniform commands for booting xen
Date: Mon, 11 Jan 2016 07:32:19 -0700

>>> On 11.01.16 at 15:06, <address@hidden> wrote:
> On 13.11.2015 10:50, Ian Campbell wrote:
>> On Fri, 2015-11-13 at 12:04 +0300, Andrei Borzenkov wrote:
>>>> How do you express modules other than kernel+initrd in that
>>>> scheme, without grub needing to be aware of any new addition we
>>>> may find necessary going forward?
>>> Are modules used by Xen self-identifying? Is it enough to simply pass
>>> Xen kernel list of binary blobs or Xen kernel must be told what these
>>> binary blobs are? If they are self identifying, why arm needs to be
>>> passed module type in the first place?
>> At first Xen/ARM required the bootloader to identify, but that was since
>> identified as causing madness and fixed by having Xen/ARM do as Xen/x86
>> does and figure things out for itself, but I failed to communicate this
>> clearly and things got implemented on the grub side under the old
>> assumptions.
> This changes a lot. This removes most of hurdles towards uniformity. Are
> you ok with replacing xen_kernel/xen_xsm/... with just xen_module and
> dropping type altogether?
> Do you think that it makes sense to have xen_initrd in order to have
> in-memory initrd concatenation like baremetal counterpart? In either
> case we can add it later. I'd rather not have a command than to change
> its meaning later.
> Jan, does it address your concerns?

It improves things a bit, but I'd really like to not see any xen_
prefixed commands at all in grub2 - after all Xen should just be
an ordinary multiboot client.


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