[Qemu-devel] Re: Breakage with local APIC routing

[Jan Kiszka]

Johannes Schindelin wrote:
> Hi,
> 
> due to the change in revision 3371 (well, at that time, CVS was used, 
> which was no better than Subversion) installation of win64 is broken in 
> QEmu.  The commit message reads like this:
> 
>       Don't route PIC interrupts through the local APIC if the local 
>       APIC config says so. By Ari Kivity.
> 
> A bit of research showed that the patch was actually originally from Qing 
> He, but he told me privately that the part that actually broke win64 (the 
> removal of the call to cpu_reset_interrupt(), as opposed to moving that 
> call into the "else" condition) was not part of his patch.
> 
> Unfortunately, a lot has been done to the APIC handling in the meantime, 
> so it is not a simple matter of a revert.
> 
> Being a complete idiot when it comes to APICs, I have no clue how to fix 
> the issue.
> 
> However, I am quite willing to test whatever patch is thrown at me.
> 
> Can somebody help?

I recalled some earlier post on this which claimed to fix the issue and
found it in the archive:

http://permalink.gmane.org/gmane.comp.emulators.qemu/25415

However, no one replied on this, and I'm right now not sure if the fix
is OK for all cases. But it is a starting point for new discussion about
what is actually borken here.

Jan

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