From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1Lcm72-0004Sr-Vt
	for qemu-devel@nongnu.org; Thu, 26 Feb 2009 14:41:41 -0500
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1Lcm71-0004Qa-AT
	for qemu-devel@nongnu.org; Thu, 26 Feb 2009 14:41:40 -0500
Received: from [199.232.76.173] (port=47622 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1Lcm71-0004QP-18
	for qemu-devel@nongnu.org; Thu, 26 Feb 2009 14:41:39 -0500
Received: from mail-bw0-f171.google.com ([209.85.218.171]:40752)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <blauwirbel@gmail.com>) id 1Lcm70-0002St-7w
	for qemu-devel@nongnu.org; Thu, 26 Feb 2009 14:41:38 -0500
Received: by bwz19 with SMTP id 19so627004bwz.34
	for <qemu-devel@nongnu.org>; Thu, 26 Feb 2009 11:41:36 -0800 (PST)
MIME-Version: 1.0
In-Reply-To: <20090226093640.GA413@shareable.org>
References: <20090226093640.GA413@shareable.org>
Date: Thu, 26 Feb 2009 21:41:36 +0200
Message-ID: <f43fc5580902261141n2390d095lc7146b19aaa950c3@mail.gmail.com>
Subject: Re: [Qemu-devel] Machine description, an alternativ using XML
From: Blue Swirl <blauwirbel@gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Reply-To: qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org

On 2/26/09, Jamie Lokier <jamie@shareable.org> wrote:
> Torbj=C3=B6rn Andersson wrote:
>  > <MACHINE name=3DARM-INTEGRATOR>
>  >   <OBJECT name=3D"cpu" class=3D"ARM926ej">
>  >     <ATTRIBUTE name=3D"mhz">    <value integer=3D"208"/>  </ATTRIBUTE>
>  >     <ATTRIBUTE name=3D"dtcm_size">      <value integer=3D"8192"/> </AT=
TRIBUTE>
>  >       <snipp...>
>  >     <ATTRIBUTE name=3D"memmap"> <value obj_ref=3D":memmap"/>  </ATTRIB=
UTE>
>  >   </OBJECT>
>  >   <OBJECT name=3D"memmap" class=3D"MEMMAP">
>  >   </OBJECT>
>  >     ....
>  >   <OBJECT name=3D"pic" class=3D"pl190">
>  >     <ATTRIBUTE name=3D"pic">    <value obj_ref=3D":cpu"/>  </ATTRIBUTE=
>
>  >     <ATTRIBUTE name=3D"memmap"> <value obj_ref=3D":memmap"/>  </ATTRIB=
UTE>
>  >     <ATTRIBUTE name=3D"base">   <value integer=3D"0xc0010000"/>  </ATT=
RIBUTE>
>  >   </OBJECT>
>  > <MACHINE/>
>
>
> Why so verbose?
>
>  <machine name=3D"arm-integrator">
>   <cpu name=3D"cpu0" type=3D"ARM926ej">
>      <clock mhz=3D"208"/>
>      <dtcm_size>8192</dtcm_size>
>      <memmap ref=3D"memmap0"/>
>   </cpu>
>   <memmap name=3D"memmap0"/>
>   <pic name=3D"pic" type=3D"pl190">
>      <memmap ref=3D"memmap0"/>
>      <cpu ref=3D"cpu0"/>
>      <base>0xc0010000</base>
>   </pic>
>  </machine>
>
>
>  > I know you are looking at a solution based on FDT. My belief is that t=
he XML
>  > solution is more flexible, but I admit that I know very little about F=
DT.
>  > Further, I believe that one can create FDTs, from the XML machine
>  > definitions, in runtime and pass them to the target-os if required.
>  >
>  > The strong point with the XML solution is that it is very suitable for
>  > modeling embedded systems where lots of GPIOs, interrupts, dma-channel=
s,
>  > i2c, spi, i2s/pcm etc.
>
>
> Isn't FDT capable of that too?
>
>
>  > I know that this is will result in a large patch set but I think the F=
DT is
>  > equally big. Further I believe we can have both schemes in QEMU in par=
allel,
>  > if necessary.
>
>
> If the schemes are equivalently powerful, you can have a converter
>  which sits outside QEMU.  No need to implement both inside QEMU.
>  People do this already, converting config files to QEMU command line
>  options.
>
>  Fwiw, Microsoft Virtual PC uses an XML file to describe the machine
>  and it makes sense to me.
>
>  Here's an example from a real VPC machine.  Hmm, maybe it's a bit long.
>  Is the equivalent FDT any clearer or shorter, though?
>
>  -- Jamie
>
>
>
>  <?xml version=3D"1.0" encoding=3D"UTF-16"?>
>  <!-- Microsoft Virtual Machine Options and Settings -->
>  <preferences>
>     <version type=3D"string">2.0</version>
>     <alerts>
>         <notifications>
>             <no_boot_disk type=3D"boolean">true</no_boot_disk>
>         </notifications>
>     </alerts>
>     <hardware>
>         <memory>
>             <ram_size type=3D"integer">512</ram_size>
>         </memory>
>         <pci_bus>
>             <ethernet_adapter>
>                 <controller_count type=3D"integer">1</controller_count>
>                 <ethernet_controller id=3D"0">
>                     <virtual_network>
>                         <id type=3D"bytes">123412341234123412341234123412=
34</id>
>                         <name type=3D"string">Marvell Yukon 88E8056 PCI-E=
 Gigabit Ethernet Controller</name>
>                     </virtual_network>
>                     <ethernet_card_address type=3D"bytes">000123456789</e=
thernet_card_address>
>                 </ethernet_controller>
>             </ethernet_adapter>
>             <video_adapter>
>                 <vram_size type=3D"integer">8</vram_size>
>             </video_adapter>
>             <ide_adapter>
>                 <ide_controller id=3D"1">
>                     <location id=3D"0">
>                         <drive_type type=3D"integer">2</drive_type>
>                         <pathname>
>                             <absolute type=3D"string">\\srv\Develop\Softw=
are\MS SQL Eval\SQLEVAL.ISO</absolute>
>                             <relative type=3D"string" />
>                         </pathname>
>                     </location>
>                 </ide_controller>
>                 <ide_controller id=3D"0">
>                     <location id=3D"0">
>                         <drive_type type=3D"integer">1</drive_type>
>                         <pathname>
>                             <absolute type=3D"string">C:\Documents and Se=
ttings\test\My Documents\My Virtual Machines\test\test Hard Disk.vhd</absol=
ute>
>                             <relative type=3D"string">.\test Hard Disk.vh=
d</relative>
>                         </pathname>
>                         <undo_pathname>
>                             <absolute type=3D"string" />
>                             <relative type=3D"string" />
>                         </undo_pathname>
>                     </location>
>                 </ide_controller>
>             </ide_adapter>
>         </pci_bus>
>         <standard>
>             <name type=3D"string">Virtual PC 2007</name>
>             <version type=3D"string">0001.0000.0000</version>
>         </standard>
>         <super_io>
>             <floppy id=3D"0">
>                 <pathname>
>                     <absolute type=3D"string" />
>                     <relative type=3D"string" />
>                 </pathname>
>             </floppy>
>             <floppy>
>                 <auto_detect type=3D"boolean">true</auto_detect>
>             </floppy>
>             <parallel_port>
>                 <port_shared type=3D"boolean">false</port_shared>
>                 <port_type type=3D"integer">0</port_type>
>             </parallel_port>
>             <serial_port>
>                 <connect_immediately type=3D"boolean">false</connect_imme=
diately>
>             </serial_port>
>         </super_io>
>         <bios>
>             <base_board>
>                 <serial_number type=3D"string">8886-9141-1653-9060-4025-7=
842-65</serial_number>
>             </base_board>
>             <bios_guid type=3D"string">{125BDA48-420C-446E-AA48-9B5976322=
29C}</bios_guid>
>             <bios_serial_number type=3D"string">8886-9141-1653-9060-4025-=
7842-65</bios_serial_number>
>             <chassis>
>                 <asset_tag type=3D"string">8886-9141-1653-9060-4025-7842-=
65</asset_tag>
>                 <serial_number type=3D"string">8886-9141-1653-9060-4025-7=
842-65</serial_number>
>             </chassis>
>             <cmos type=3D"bytes">00004000F0223F8002FFFF2F00FF3F1000003F00=
000000000031004C070707070666FFFF208580FF01000000200C01800CF4000000000000000=
00000000000901A32E24A580050E999E62401002784004A2080240000000000085AACFE1032=
547698BAE400000000000003000000000000000000000000000000000000000000000000000=
000000000000000000000000000000000000000000000000000000000000000000000000000=
000000000000000000000000000000000000000000000000000000000000000000000000000=
000000000000000000000000000000000000000000000000000000000000000000000</cmos=
>
>             <time_bytes type=3D"bytes">42004800120002290408</time_bytes>
>         </bios>
>     </hardware>
>     <integration>
>         <microsoft>
>             <mouse>
>                 <allow type=3D"boolean">true</allow>
>             </mouse>
>             <video>
>                 <user_selected>
>                     <depth type=3D"integer">16</depth>
>                     <height type=3D"integer">480</height>
>                     <width type=3D"integer">640</width>
>                 </user_selected>
>             </video>
>             <version>
>                 <additions_number type=3D"string">013803</additions_numbe=
r>
>                 <guest_os>
>                     <build_number type=3D"string">5.02.3790</build_number=
>
>                     <long_name type=3D"string">Microsoft Windows Server 2=
003</long_name>
>                     <revision_number type=3D"string">Service Pack 2</revi=
sion_number>
>                     <short_name type=3D"string">Windows Server 2003</shor=
t_name>
>                     <suite_name type=3D"string">Server</suite_name>
>                 </guest_os>
>             </version>
>         </microsoft>
>     </integration>
>     <properties>
>         <creator>
>             <build type=3D"string">6.0.156.0</build>
>             <name type=3D"string">Microsoft Virtual PC 2007</name>
>         </creator>
>         <modifier>
>             <build type=3D"string">6.0.156.0</build>
>             <name type=3D"string">Microsoft Virtual PC 2007</name>
>         </modifier>
>     </properties>
>     <settings>
>         <shutdown>
>             <prompt type=3D"boolean">true</prompt>
>             <quit>
>                 <action type=3D"integer">4</action>
>                 <was_running type=3D"boolean">false</was_running>
>             </quit>
>             <save>
>                 <enable type=3D"boolean">true</enable>
>             </save>
>             <shutdown>
>                 <enable type=3D"boolean">true</enable>
>             </shutdown>
>             <turn_off>
>                 <enable type=3D"boolean">true</enable>
>             </turn_off>
>             <last_shutdown>
>                 <choice type=3D"integer">0</choice>
>                 <commit type=3D"boolean">true</commit>
>             </last_shutdown>
>         </shutdown>
>         <sound>
>             <sound_adapter>
>                 <enable type=3D"boolean">true</enable>
>             </sound_adapter>
>         </sound>
>         <startup>
>             <automatic>
>                 <type type=3D"integer">2</type>
>             </automatic>
>         </startup>
>         <undo_drives>
>             <enabled type=3D"boolean">false</enabled>
>             <purposely_kept type=3D"boolean">false</purposely_kept>
>             <use_default type=3D"boolean">true</use_default>
>         </undo_drives>
>         <video>
>             <disable_resize type=3D"boolean">false</disable_resize>
>             <full_screen type=3D"boolean">false</full_screen>
>             <mode>
>                 <full_screen>
>                     <startup type=3D"boolean">false</startup>
>                 </full_screen>
>             </mode>
>             <resolutions>
>                 <standard_only type=3D"boolean">false</standard_only>
>             </resolutions>
>             <height type=3D"integer">768</height>
>             <left_position type=3D"integer">1361</left_position>
>             <max_height type=3D"integer">768</max_height>
>             <max_width type=3D"integer">1024</max_width>
>             <top_position type=3D"integer">58</top_position>
>             <width type=3D"integer">1024</width>
>         </video>
>         <guest_os type=3D"integer">6</guest_os>
>     </settings>
>     <virtual_machines>
>         <hw_assist>
>             <enable_hw_assist type=3D"boolean">true</enable_hw_assist>
>         </hw_assist>
>     </virtual_machines>
>  </preferences>

OK, so now we have:
1 - Fabrice's original proposal
2 - Paul's FDT based work
3 - Mark's FDT based work
4 - Torbj=C3=B6rn's XML based configuration
5 - Microsoft XML configuration

Actually this M$ version could be interesting for compatibility reasons.