Xen devel - Jun 2013 - linux acpi v5 on xen

Jan,

In the commit below, you implemented the linux support for ACPI v5 in
the traditional Xen kernel:
http://kernel.opensuse.org/cgit/kernel/commit/?id=ca88976f0e2454febeb4a9cd0b5099d34cd7a953

I have extracted the relevant bits that implement the extended acpi
call, and applied them to a mainline pvops kernel, and had good
success with a machine that was previously failing.

Konrad said that you may have submitted this upstream already, and
perhaps remembered that Rafael wanted some changes here (possibly bool
to u8 substitutions?)
I was unable to wrangle google into finding the relevant thread on LKML.
Do you happen to recall this conversation? Do you have a link
somewhere that I could read?

I would like to pursue working to get this functionality upstream, if
possible - but want to have all of the background covered, before
doing so.

The work-in-progress patch can be seen here:
http://tinyurl.com/qcmhte8
Clearly, the commit comment needs some work.


Thanks for any information you can provide.


Ben

>>> On 25.06.13 at 20:33, Ben Guthro <ben@guthro.net> wrote:
> In the commit below, you implemented the linux support for ACPI v5 in
> the traditional Xen kernel:
>
http://kernel.opensuse.org/cgit/kernel/commit/?id=ca88976f0e2454febeb4a9cd0b
> 5099d34cd7a953
> 
> I have extracted the relevant bits that implement the extended acpi
> call, and applied them to a mainline pvops kernel, and had good
> success with a machine that was previously failing.
> 
> Konrad said that you may have submitted this upstream already, and
> perhaps remembered that Rafael wanted some changes here (possibly bool
> to u8 substitutions?)
> I was unable to wrangle google into finding the relevant thread on LKML.
> Do you happen to recall this conversation? Do you have a link
> somewhere that I could read?
v2 of this was sent on March 11th, see e.g.

http://lists.xenproject.org/archives/html/xen-devel/2013-03/msg00829.html
(I would have wanted to point you to somewhere under
https://patchwork.kernel.org/project/linux-acpi/, but this appears
badly broken right now in that it has only _three_ pretty recent
patches).

The response I got to this was that ACPI CA changes ought to
go through the ACPI CA tree, which I don''t think I''ll ever
find time
to work through (the more with no reasonable assurance level of
those changes going to be taken, and considering that similar
changes previously got done to Linux without this bogus [to me]
requirement - see my responses
http://lists.xenproject.org/archives/html/xen-devel/2013-03/msg00873.html
and
http://lists.xenproject.org/archives/html/xen-devel/2013-03/msg00850.html).

Jan