Re: [Qemu-devel] qemu-system-sparc uses all host cpu whiletargetsystem is idle

Re: [Qemu-devel] qemu-system-sparc uses all host cpu whiletargetsystem is idle

[Blue Swirl]

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>Please find below a patch that "works". It is probably wrong as I wrote it
>by copying code from other architectures and trying until it works. Well
>I am however convinced of two things:
>  - "return EXCP_HALTED;" causes the crash. By removing this line qemu
>    doesn't crash anymore, but the patch does not work as expected
>    (freeze of the target).
>  - The interrupt should be cleared, if not the target freeze.
>
>Now the host CPU is not used at 100% when the Sparc target is idle. I am
>using it for about one our with a Debian unstable, and I am writing this
>mail from this emulated system.

Great work! I can also confirm that it works and CPU is halted correctly.

Please apply.

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Re: [Qemu-devel] qemu-system-sparc uses all host cpu whiletargetsystem is idle

[Joerg Platte]

Am Mittwoch, 20. September 2006 21:25 schrieb Blue Swirl:

> Great work! I can also confirm that it works and CPU is halted correctly.

Here it doesn't work with linux 2.6.13. Is there a special configuration 
option or kernel version required to make it work? 

regards,
Jörg

Re: [Qemu-devel] qemu-system-sparc uses all host cpu whiletargetsystem is idle

[Aurelien Jarno]

Joerg Platte wrote:
> Am Mittwoch, 20. September 2006 21:25 schrieb Blue Swirl:
> 
>> Great work! I can also confirm that it works and CPU is halted correctly.
> 
> Here it doesn't work with linux 2.6.13. Is there a special configuration 
> option or kernel version required to make it work? 

You also need to update openbios from the latest SVN. Then prtconf 
should report a device called "power-management" (and not 
"xxxpower-management").

-- 
   .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
  : :' :  Debian developer           | Electrical Engineer
  `. `'   aurel32@debian.org         | aurelien@aurel32.net
    `-    people.debian.org/~aurel32 | www.aurel32.net

Re: [Qemu-devel] qemu-system-sparc uses all host cpu whiletargetsystem is idle

[Joerg Platte]

Am Donnerstag, 21. September 2006 10:53 schrieb Aurelien Jarno:

> You also need to update openbios from the latest SVN. Then prtconf
> should report a device called "power-management" (and not
> "xxxpower-management").

Thank you for this information. Now it works and helps to save a lot of 
battery power of my notebook :)

regards,
Jörg