[Qemu-devel] gentoo disk image for QEmu

[Qemu-devel] gentoo disk image for QEmu

[Jérôme Bouat]

Hi,

I would generate a Gentoo Linux disk image for QEmu.

This source based Linux distro can be configurated to generate hardware
specific binaries through its package management system.

I previously tried with Bochs. Therefore, I wrote some scripts. The main
part of the generation was made in a Linux chrooted environment on a
real host which was compatible with the emulated host. The disk image
generation was blocked by the boot loader installation step.

Are you interested by those generation scripts ?

Jérôme

Re: [Qemu-devel] gentoo disk image for QEmu

[Magnus Damm]

Hello,

On Mon, 07 Mar 2005 21:55:36 +0100, Jérôme Bouat
<jerome.bouat@wanadoo.fr> wrote:
> I would generate a Gentoo Linux disk image for QEmu.
> 
> This source based Linux distro can be configurated to generate hardware
> specific binaries through its package management system.
> 
> I previously tried with Bochs. Therefore, I wrote some scripts. The main
> part of the generation was made in a Linux chrooted environment on a
> real host which was compatible with the emulated host. The disk image
> generation was blocked by the boot loader installation step.

I'm not sure I understand your question. Is the problem that the
chrooted environment was unable to install a bootloader for the target
system?

I've hacked up a filesystem manipulation tool that is available for download at:

http://www.smallworks.com/~jim/fsimage/

The tool is actually a shell script and a small x86 distribution that
together are used to access filesystems independent of root access or
host kernel configuration. Needless to say, the tool depends on QEMU.
0.6.1 or newer.

I am not sure if the tool is of interest for you, but maybe it helps.

/ magnus

[Qemu-devel] ESC key problems & keyboard problems

[Paulo R. Dallan]

Hi!

I've been using qemu/kqemu in a linux host - very nice work folks, 
congratulations.

I'm just having a little keyboard problem. Unfortunately, if I don't choose a 
keyboard layout ("-k pt-br"), the key "/" and "?" is not recognized either in 
Linux or Windows (its a Brazilian ABNT2 keyboard).

However, when I choose a keyboard map ("-k en-us", for example), the ESC key 
does not work.

Is anyone having the same problem?

PS: Just a side note, some time ago, there was a similar little bug in kbd, 
after compiling dri - open source video acceleration drivers - from sources, 
by which certain keys - especially this "/" and "?" key was not recognized; I 
noticed the problem after installing a dri video driver from source, and 
solved it through the quick & dirty solution I described here:

http://sourceforge.net/mailarchive/message.php?msg_id=7263141

More comments about it here:

http://sourceforge.net/mailarchive/message.php?msg_id=7264988

and here:

http://sourceforge.net/mailarchive/message.php?msg_id=7289423

Considering that according to information contained in qemu source files 
related to the keyboard layouts, same are based on kbd, and as it seems some 
information may have come from Red Hat 7 or 9.0 
(http://fabrice.bellard.free.fr/qemu/qemu-doc.html#TOC42), which uses xfree86 
(which dri also used at the time), there may be some connection between the 
problems and the solution to this little annoyance in qemu may be related 
(not sure how the keymaps are used in qemu though)...

Another note is that there was no such problem after dri moved to xorg (and 
its kbd version). Don't know if this has been solved in later xfree86 
editions.

Anyway, best regards and congratulations for the excellent work!

Paulo

Re: [Qemu-devel] ESC key problems & keyboard problems

[Oliver Gerlich]

There was a fix in CVS some days ago which made ESC available with 
keymaps. If you get errors on your console when pressing ESC, you should 
try a newer CVS snapshot.

Oliver Gerlich


Paulo R. Dallan schrieb:
> Hi!
> 
> I've been using qemu/kqemu in a linux host - very nice work folks, 
> congratulations.
> 
> I'm just having a little keyboard problem. Unfortunately, if I don't choose a 
> keyboard layout ("-k pt-br"), the key "/" and "?" is not recognized either in 
> Linux or Windows (its a Brazilian ABNT2 keyboard).
> 
> However, when I choose a keyboard map ("-k en-us", for example), the ESC key 
> does not work.
> 
> Is anyone having the same problem?
> 
> PS: Just a side note, some time ago, there was a similar little bug in kbd, 
> after compiling dri - open source video acceleration drivers - from sources, 
> by which certain keys - especially this "/" and "?" key was not recognized; I 
> noticed the problem after installing a dri video driver from source, and 
> solved it through the quick & dirty solution I described here:
> 
> http://sourceforge.net/mailarchive/message.php?msg_id=7263141
> 
> More comments about it here:
> 
> http://sourceforge.net/mailarchive/message.php?msg_id=7264988
> 
> and here:
> 
> http://sourceforge.net/mailarchive/message.php?msg_id=7289423
> 
> Considering that according to information contained in qemu source files 
> related to the keyboard layouts, same are based on kbd, and as it seems some 
> information may have come from Red Hat 7 or 9.0 
> (http://fabrice.bellard.free.fr/qemu/qemu-doc.html#TOC42), which uses xfree86 
> (which dri also used at the time), there may be some connection between the 
> problems and the solution to this little annoyance in qemu may be related 
> (not sure how the keymaps are used in qemu though)...
> 
> Another note is that there was no such problem after dri moved to xorg (and 
> its kbd version). Don't know if this has been solved in later xfree86 
> editions.
> 
> Anyway, best regards and congratulations for the excellent work!
> 
> Paulo
> 
> 
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
> 
> 

Re: [Qemu-devel] ESC key problems & keyboard problems

[Paulo R. Dallan]

Hi!

On Wednesday 09 March 2005 11:16, Oliver Gerlich wrote:
> There was a fix in CVS some days ago which made ESC available with
> keymaps. If you get errors on your console when pressing ESC, you should
> try a newer CVS snapshot.
>
> Oliver Gerlich

Thank you Oliver, I'm going try that... On this aspect, just a note, is there 
an specific way to *uninstall* a previous version of qemu (the one I have 
here I compiled from sources), or should I just download/recompile and 
install over the old files? (I know, it may not be advisable to do this with 
many applications, but in some others as the files are the same and just 
replaced, there are not many problems)...

Still regarding the key problem, who would be in charge of the keyboards 
lay-outs? (In relation to the kbd Brazilian abnt2 keyboard issue I mentioned 
in my previous e-mail...) 

> Paulo R. Dallan schrieb:
> > Hi!
> >
> > I've been using qemu/kqemu in a linux host - very nice work folks,
> > congratulations.
> >
> > I'm just having a little keyboard problem. Unfortunately, if I don't
> > choose a keyboard layout ("-k pt-br"), the key "/" and "?" is not
> > recognized either in Linux or Windows (its a Brazilian ABNT2 keyboard).
> >
> > However, when I choose a keyboard map ("-k en-us", for example), the ESC
> > key does not work.
> >
> > Is anyone having the same problem?
> >
> > PS: Just a side note, some time ago, there was a similar little bug in
> > kbd, after compiling dri - open source video acceleration drivers - from
> > sources, by which certain keys - especially this "/" and "?" key was not
> > recognized; I noticed the problem after installing a dri video driver
> > from source, and solved it through the quick & dirty solution I described
> > here:
> >
> > http://sourceforge.net/mailarchive/message.php?msg_id=7263141
> >
> > More comments about it here:
> >
> > http://sourceforge.net/mailarchive/message.php?msg_id=7264988
> >
> > and here:
> >
> > http://sourceforge.net/mailarchive/message.php?msg_id=7289423
> >
> > Considering that according to information contained in qemu source files
> > related to the keyboard layouts, same are based on kbd, and as it seems
> > some information may have come from Red Hat 7 or 9.0
> > (http://fabrice.bellard.free.fr/qemu/qemu-doc.html#TOC42), which uses
> > xfree86 (which dri also used at the time), there may be some connection
> > between the problems and the solution to this little annoyance in qemu
> > may be related (not sure how the keymaps are used in qemu though)...
> >
> > Another note is that there was no such problem after dri moved to xorg
> > (and its kbd version). Don't know if this has been solved in later
> > xfree86 editions.
> >
> > Anyway, best regards and congratulations for the excellent work!
> >
> > Paulo

<snip>

Regards!

Paulo

Re: [Qemu-devel] Still some keyboard problems (was: ESC key problems & keyboard problems)

[Paulo R. Dallan]

Hi everyone, Oliver!

Still some keyboard problems: if I don't load any keyboard layout, I still 
don't get the "/" and "?" keys...

Now, if I load the pt-br layout "-k pt-br", yes, I get both the "/" and "?" 
key and now the "ESC" is "there"; However, the "accent" keys ("'", "`", "^" 
and "~" keys) don't work anymore... :( 
(Please notice the "accent" keys work when I don't load any keyboard 
layout...)

PS: The version I'm using is cvs from March 10, 2005, with kqemu.

Is there anyone directly in charge of the keyboards layouts?

Again, congratulations for the good work and best regards!

Paulo


On Wednesday 09 March 2005 18:44, Paulo R. Dallan wrote:
> Hi!
>
> On Wednesday 09 March 2005 11:16, Oliver Gerlich wrote:
> > There was a fix in CVS some days ago which made ESC available with
> > keymaps. If you get errors on your console when pressing ESC, you should
> > try a newer CVS snapshot.
> >
> > Oliver Gerlich
>
> Thank you Oliver, I'm going try that... On this aspect, just a note, is
> there an specific way to *uninstall* a previous version of qemu (the one I
> have here I compiled from sources), or should I just download/recompile and
> install over the old files? (I know, it may not be advisable to do this
> with many applications, but in some others as the files are the same and
> just replaced, there are not many problems)...
>
> Still regarding the key problem, who would be in charge of the keyboards
> lay-outs? (In relation to the kbd Brazilian abnt2 keyboard issue I
> mentioned in my previous e-mail...)
>
> > Paulo R. Dallan schrieb:
> > > Hi!
> > >
> > > I've been using qemu/kqemu in a linux host - very nice work folks,
> > > congratulations.
> > >
> > > I'm just having a little keyboard problem. Unfortunately, if I don't
> > > choose a keyboard layout ("-k pt-br"), the key "/" and "?" is not
> > > recognized either in Linux or Windows (its a Brazilian ABNT2 keyboard).
> > >
> > > However, when I choose a keyboard map ("-k en-us", for example), the
> > > ESC key does not work.
> > >
> > > Is anyone having the same problem?
> > >
> > > PS: Just a side note, some time ago, there was a similar little bug in
> > > kbd, after compiling dri - open source video acceleration drivers -
> > > from sources, by which certain keys - especially this "/" and "?" key
> > > was not recognized; I noticed the problem after installing a dri video
> > > driver from source, and solved it through the quick & dirty solution I
> > > described here:
> > >
> > > http://sourceforge.net/mailarchive/message.php?msg_id=7263141
> > >
> > > More comments about it here:
> > >
> > > http://sourceforge.net/mailarchive/message.php?msg_id=7264988
> > >
> > > and here:
> > >
> > > http://sourceforge.net/mailarchive/message.php?msg_id=7289423
> > >
> > > Considering that according to information contained in qemu source
> > > files related to the keyboard layouts, same are based on kbd, and as it
> > > seems some information may have come from Red Hat 7 or 9.0
> > > (http://fabrice.bellard.free.fr/qemu/qemu-doc.html#TOC42), which uses
> > > xfree86 (which dri also used at the time), there may be some connection
> > > between the problems and the solution to this little annoyance in qemu
> > > may be related (not sure how the keymaps are used in qemu though)...
> > >
> > > Another note is that there was no such problem after dri moved to xorg
> > > (and its kbd version). Don't know if this has been solved in later
> > > xfree86 editions.
> > >
> > > Anyway, best regards and congratulations for the excellent work!

Re: [Qemu-devel] gentoo disk image for QEmu

[Jérôme Bouat]

Here is what did my scripts in order to install the bootloader :
---
/sbin/losetup $(loop_device_2) $(disk_image).tmp && \
mount -t proc none $(tree)/proc && \
$(chroot) $(tree) /bin/bash install_grub.sh && \
/sbin/losetup -d $(loop_device_2) && \
---

with 'install_grub.sh':
---
/usr/sbin/env-update && source /etc/profile &&
echo using this device map for GRUB: &&
echo --- &&
cat dev.map &&
echo --- &&
grub --device-map=dev.map <<END
root (hd0,0)
setup (hd0)
END
---

But it never worked. Could your tool help me ?

Le lundi 07 mars 2005 à 22:26 +0100, Magnus Damm a écrit :
> Hello,
> 
> On Mon, 07 Mar 2005 21:55:36 +0100, Jérôme Bouat
> <jerome.bouat@wanadoo.fr> wrote:
> > I would generate a Gentoo Linux disk image for QEmu.
> > 
> > This source based Linux distro can be configurated to generate hardware
> > specific binaries through its package management system.
> > 
> > I previously tried with Bochs. Therefore, I wrote some scripts. The main
> > part of the generation was made in a Linux chrooted environment on a
> > real host which was compatible with the emulated host. The disk image
> > generation was blocked by the boot loader installation step.
> 
> I'm not sure I understand your question. Is the problem that the
> chrooted environment was unable to install a bootloader for the target
> system?
> 
> I've hacked up a filesystem manipulation tool that is available for download at:
> 
> http://www.smallworks.com/~jim/fsimage/
> 
> The tool is actually a shell script and a small x86 distribution that
> together are used to access filesystems independent of root access or
> host kernel configuration. Needless to say, the tool depends on QEMU.
> 0.6.1 or newer.
> 
> I am not sure if the tool is of interest for you, but maybe it helps.
> 
> / magnus
> 
> 
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
> 

Re: [Qemu-devel] gentoo disk image for QEmu

[Magnus Damm]

Hello again,

On Sat, 12 Mar 2005 10:55:49 +0100, Jérôme Bouat
<jerome.bouat@wanadoo.fr> wrote:
> Here is what did my scripts in order to install the bootloader :
> ---
> /sbin/losetup $(loop_device_2) $(disk_image).tmp && \
> mount -t proc none $(tree)/proc && \
> $(chroot) $(tree) /bin/bash install_grub.sh && \
> /sbin/losetup -d $(loop_device_2) && \
> ---
> 
> with 'install_grub.sh':
> ---
> /usr/sbin/env-update && source /etc/profile &&
> echo using this device map for GRUB: &&
> echo --- &&
> cat dev.map &&
> echo --- &&
> grub --device-map=dev.map <<END
> root (hd0,0)
> setup (hd0)
> END
> ---
> 
> But it never worked. Could your tool help me ?

Grub is not included in my tool, so I guess it won't help you in this
case. But feel free to add grub and send a patch to me. =)

Have you tried executing the commands one by one to see exectly where
things fail? Verify that the chrooted environment has all the required
device nodes and libraries.

/ magnus

Re: [Qemu-devel] Still some keyboard problems

[Oliver Gerlich]

Paulo R. Dallan schrieb:
> Hi everyone, Oliver!
> 
> Still some keyboard problems: if I don't load any keyboard layout, I still 
> don't get the "/" and "?" keys...
> 
> Now, if I load the pt-br layout "-k pt-br", yes, I get both the "/" and "?" 
> key and now the "ESC" is "there"; However, the "accent" keys ("'", "`", "^" 
> and "~" keys) don't work anymore... :( 
> (Please notice the "accent" keys work when I don't load any keyboard 
> layout...)
> 
> PS: The version I'm using is cvs from March 10, 2005, with kqemu.
> 
> Is there anyone directly in charge of the keyboards layouts?
> 
> Again, congratulations for the good work and best regards!
> 
> Paulo
> 

Maybe the keymaps don't contain all keys yet, or qemu doesn't support 
the keys mentioned... In the latter case, you should see messages like 
"no scancode found for ..." on the console if you press such a key. If 
no such error appears, the problems is probably in the keymap files 
which are somewhere under /usr/share/ ... I think :) . In this case, you 
could experiment with your keymaps and try to add support for your keys 
- other users would surely appreciate this.

About the key problems if not using a keymap: it looks as if this old 
method is "obsoleted" by keymap support; IIRC other keyboard 
improvements (like Windows keys) were only added to keymaps (internally, 
there's a hardcoded keymap in qemu which is used when no -k option is 
given; this really looks obsolete :).

Good luck,
Oliver

[Qemu-devel] x86 emulated hardware : which make.conf options ?

[Jérôme Bouat]

I would like to install Gentoo Linux on QEmu.
I want to compile some programs in order to fit QEmu emulated hardware.

Here are the flags I assume to fit emulated hardware :
I choosed -Os to optimize global speed (with emulation). Is it true ?
---
CFLAGS="-Os -fomit-frame-pointer -pipe -march=i386 -mno-mmx -mno-3dnow
-mno-sse2"
CXXFLAGS="${CFLAGS}"
---

What do you think about it ?


Thanks,
Jérôme

Re: [Qemu-devel] x86 emulated hardware : which make.conf options ?

[Karel Gardas]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: TEXT/PLAIN; charset=X-UNKNOWN, Size: 672 bytes --]

On Fri, 1 Apr 2005, [ISO-8859-1] Jérôme Bouat wrote:

> I would like to install Gentoo Linux on QEmu.
> I want to compile some programs in order to fit QEmu emulated hardware.
>
> Here are the flags I assume to fit emulated hardware :
> I choosed -Os to optimize global speed (with emulation). Is it true ?

-Os provides resulting binary size optimizations. If you would like to
optimize for speed then you should probably use -O2 (which is general) or
-O3 (which is quite code specific and sometimes leads to slowdown)

Cheers,
Karel
--
Karel Gardas                  kgardas@objectsecurity.com
ObjectSecurity Ltd.           http://www.objectsecurity.com

Re: [Qemu-devel] x86 emulated hardware : which make.conf options ?

[Natalia Portillo]

Use the same optimizations you should use in a real Pentium II.
You can also enable SSE and SSE2 (but not Pentium III or Pentium 4), as 
QEMU emulates them.

El 01/04/2005, a las 14:05, Jérôme Bouat escribió:

> I would like to install Gentoo Linux on QEmu.
> I want to compile some programs in order to fit QEmu emulated hardware.
>
> Here are the flags I assume to fit emulated hardware :
> I choosed -Os to optimize global speed (with emulation). Is it true ?
> ---
> CFLAGS="-Os -fomit-frame-pointer -pipe -march=i386 -mno-mmx -mno-3dnow
> -mno-sse2"
> CXXFLAGS="${CFLAGS}"
> ---
>
> What do you think about it ?
>
>
> Thanks,
> Jérôme
>
>
>
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>

Re: [Qemu-devel] x86 emulated hardware : which make.conf options ?

[Paul Brook]

On Friday 01 April 2005 18:26, Natalia Portillo wrote:
> Use the same optimizations you should use in a real Pentium II.
> You can also enable SSE and SSE2 (but not Pentium III or Pentium 4), as
> QEMU emulates them.

Do you have any facts to substatiate this statement?

The pentium 2, 3, and 4 all support the same core instruction set, the only 
difference being sse and sse2. From the qemu point of view a pentuim3/4 is 
just a pentium2 with sse/sse2.

Qemu emulates the x86 instruction set. It does not implement the 
microarchitecture of a particular implementation. I haven't done any tests, 
but I'd expect the performance characteristics of qemu are significantly 
different to those of a real CPU.

-Os optimizes for code size, not speed. This may be faster than -O2 in some 
cases, but I'd be surprised if that was true in general.

Paul

Re: [Qemu-devel] x86 emulated hardware : which make.conf options ?

[Natalia Portillo]

Yes, there are a lot of added instructions for P3 and P4, just see the 
Intel IA-32 manual.
For example, there is CMPXCHG16B in P4, but not in P3 nor P2.

El 01/04/2005, a las 19:04, Paul Brook escribió:

> On Friday 01 April 2005 18:26, Natalia Portillo wrote:
>> Use the same optimizations you should use in a real Pentium II.
>> You can also enable SSE and SSE2 (but not Pentium III or Pentium 4), 
>> as
>> QEMU emulates them.
>
> Do you have any facts to substatiate this statement?
>
> The pentium 2, 3, and 4 all support the same core instruction set, the 
> only
> difference being sse and sse2. From the qemu point of view a 
> pentuim3/4 is
> just a pentium2 with sse/sse2.
>
> Qemu emulates the x86 instruction set. It does not implement the
> microarchitecture of a particular implementation. I haven't done any 
> tests,
> but I'd expect the performance characteristics of qemu are 
> significantly
> different to those of a real CPU.
>
> -Os optimizes for code size, not speed. This may be faster than -O2 in 
> some
> cases, but I'd be surprised if that was true in general.
>
> Paul
>
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>