qemu-devel.nongnu.org archive mirror
 help / color / mirror / Atom feed
From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: devicetree-discuss@ozlabs.org,
	Markus Armbruster <armbru@redhat.com>,
	David Gibson <david@gibson.dropbear.id.au>
Subject: Re: [Qemu-devel] [RFC] Machine description as data
Date: Tue, 17 Feb 2009 17:44:34 +0000	[thread overview]
Message-ID: <200902171744.34951.paul@codesourcery.com> (raw)
In-Reply-To: <20090217032909.GA29225@yookeroo.seuss>

> > The machines I care for come with many optional and configurable parts.
> > We select the basic machine type with command line option -M, and
> > configure the rest with more command line options.  I figure we want to
> > keep supporting these options, at least for a while.
> >
> > I believe the best way to deal with that is start with a basic tree
> > selected by -M, then modify it according to the other options.  So,
> > there's a fair amount of configuration tree mutation.
>
> Yeah, you're probably right.  Although, in some cases the amount of
> complex tree mutation can be cut down by thinking about things in the
> right order.  For example if you have a bunch of optional devices,
> rather than adding them one by one (with all the required properties)
> to the skeleton tree, you can instead have the skeleton tree be the
> all-bells-and-whistles variant then delete the subtrees that aren't
> present.  libfdt even has a function to replace subtrees with nops
> instead of eliding them, which means the offsets of other nodes won't
> change.

I'm not so sure this is a vital feature. The current commandline options only 
provide the absolute bare minimum mutation for a basic PC machine, and don't 
even do that particularly well. I'm inclined to say we should punt 
significant machine config modification/generation to an external tool.

Paul

  parent reply	other threads:[~2009-02-17 17:44 UTC|newest]

Thread overview: 92+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-11 15:40 [Qemu-devel] [RFC] Machine description as data Markus Armbruster
2009-02-11 16:31 ` Ian Jackson
2009-02-11 17:43   ` Markus Armbruster
2009-02-11 18:57   ` Hollis Blanchard
2009-02-12  3:50     ` David Gibson
2009-02-11 18:50 ` Hollis Blanchard
2009-02-11 19:34   ` Blue Swirl
2009-02-12  4:01   ` David Gibson
2009-02-12 10:26     ` Markus Armbruster
2009-02-12 12:49       ` Carl-Daniel Hailfinger
2009-02-12 16:46         ` M. Warner Losh
2009-02-12 18:29           ` Markus Armbruster
2009-02-12 23:58             ` Carl-Daniel Hailfinger
2009-02-13 11:19               ` Markus Armbruster
2009-02-13  1:05             ` David Gibson
2009-02-12 23:35           ` Carl-Daniel Hailfinger
2009-02-12 23:58             ` Paul Brook
2009-02-13  0:32               ` Carl-Daniel Hailfinger
2009-02-13  0:47                 ` Jamie Lokier
2009-02-13  1:46                 ` David Gibson
2009-02-13 14:32                 ` Lennart Sorensen
2009-02-13  0:05             ` M. Warner Losh
2009-02-12 17:52       ` Hollis Blanchard
2009-02-12 18:53         ` Markus Armbruster
2009-02-12 19:33           ` Mitch Bradley
2009-02-13  0:59             ` David Gibson
2009-02-13  1:00         ` David Gibson
2009-02-13  0:43       ` David Gibson
2009-02-13  2:11         ` Carl-Daniel Hailfinger
2009-02-13  2:17           ` David Gibson
2009-02-13  2:45             ` DTS syntax and DTC patches (was: Re: [Qemu-devel] [RFC] Machine description as data) Carl-Daniel Hailfinger
2009-02-13  2:51               ` David Gibson
2009-02-13 20:04           ` [Qemu-devel] [RFC] Machine description as data Jon Loeliger
2009-02-13 20:15             ` Carl-Daniel Hailfinger
2009-02-13 20:19               ` Jon Loeliger
2009-02-12 10:26   ` Markus Armbruster
2009-02-12 12:36     ` Carl-Daniel Hailfinger
2009-02-12 16:07     ` Paul Brook
2009-02-12 17:17       ` Blue Swirl
2009-02-12 18:09       ` Marcelo Tosatti
2009-02-13  0:37     ` David Gibson
2009-02-13 11:26       ` Markus Armbruster
2009-02-13 12:06         ` Paul Brook
2009-02-13 12:48           ` Markus Armbruster
2009-02-13 13:33             ` Paul Brook
2009-02-13 14:13               ` Markus Armbruster
2009-02-13 14:25                 ` Paul Brook
2009-02-13 15:47                   ` Jamie Lokier
2009-02-13 18:36                 ` Mitch Bradley
2009-02-13 19:49                   ` Markus Armbruster
2009-02-13 19:51                     ` Mitch Bradley
2009-02-16  3:42         ` David Gibson
2009-02-16 16:39           ` Markus Armbruster
2009-02-17  3:29             ` David Gibson
2009-02-17  7:54               ` Markus Armbruster
2009-02-17 17:44               ` Paul Brook [this message]
2009-02-18  8:36                 ` Markus Armbruster
2009-02-11 19:01 ` Anthony Liguori
2009-02-11 19:36   ` Blue Swirl
2009-02-11 19:56     ` Anthony Liguori
2009-02-12 10:25       ` Markus Armbruster
2009-02-16 16:22 ` [Qemu-devel] Machine description as data prototype, take 2 (was: [RFC] Machine description as data) Markus Armbruster
2009-02-17 17:32   ` Paul Brook
2009-02-18  8:42     ` [Qemu-devel] Machine description as data prototype, take 2 Markus Armbruster
2009-02-19 10:29 ` [Qemu-devel] Machine description as data prototype, take 3 (was: [RFC] Machine description as data) Markus Armbruster
2009-02-19 13:53   ` Paul Brook
2009-02-19 14:55     ` [Qemu-devel] Machine description as data prototype, take 3 Markus Armbruster
2009-02-19 15:03       ` Paul Brook
2009-02-19 14:36   ` Anthony Liguori
2009-02-19 15:00     ` Markus Armbruster
2009-02-19 14:49   ` Anthony Liguori
2009-02-23 17:38     ` Markus Armbruster
2009-02-23 18:58       ` Anthony Liguori
2009-02-24  9:08         ` Markus Armbruster
2009-02-19 16:40   ` [Qemu-devel] Machine description as data prototype, take 3 (was: [RFC] Machine description as data) Blue Swirl
2009-02-19 18:30     ` [Qemu-devel] Machine description as data prototype, take 3 Markus Armbruster
2009-02-20 18:14       ` Blue Swirl
2009-02-20 18:20         ` Paul Brook
2009-02-23 12:00           ` Markus Armbruster
2009-02-23 12:18         ` Markus Armbruster
2009-02-23 18:00 ` [Qemu-devel] Machine description as data prototype, take 4 (was: [RFC] Machine description as data) Markus Armbruster
2009-02-24 20:06   ` Blue Swirl
2009-02-25 12:13     ` [Qemu-devel] Machine description as data prototype, take 4 Markus Armbruster
2009-02-25 20:11       ` Blue Swirl
2009-03-03 17:46 ` [Qemu-devel] Machine description as data prototype, take 5 (was: [RFC] Machine description as data) Markus Armbruster
2009-03-12 18:43 ` [Qemu-devel] Machine description as data prototype, take 6 " Markus Armbruster
2009-03-17 16:06   ` [Qemu-devel] Machine description as data prototype, take 6 Paul Brook
2009-03-17 17:32     ` Markus Armbruster
2009-03-23 15:50 ` [Qemu-devel] Re: [RFC] Machine description as data Markus Armbruster
2009-03-23 15:53   ` Markus Armbruster
2009-03-31  9:16 ` Markus Armbruster
2009-04-17 16:04 ` Markus Armbruster

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200902171744.34951.paul@codesourcery.com \
    --to=paul@codesourcery.com \
    --cc=armbru@redhat.com \
    --cc=david@gibson.dropbear.id.au \
    --cc=devicetree-discuss@ozlabs.org \
    --cc=qemu-devel@nongnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).