Re: [Qemu-devel] X86-64 and APIC

[Filip Navara]

Emmanuel Charpentier wrote:

> Dear List,
>
> Natalia Portillo noticed that XP_64 refused to install due to lack of
> APICs. Filip Navara proposed an initial patch, and Fabribe Bellard
> proposed :
>
>  
>
> > I can include the patch with a specific option to enable it. The
> > option will disapear when the hack will be known to be stable.
> >    
>
> Fabrice then commited (in July) three APIC-related patches ; the current
> (0.7.2) documentation does not mention APICs. I was therefore under the
> impression that this was a solved issue.
>
> However, trying to use qemu-system-x86_64 (with kqemu) on an AMD64
> system (running under Ubuntu AMD 64 with a hand-compiled (with
> gcc-3.4.5) kernel) to test XP Pro_64 leads to no installation : the
> system complains that it can see no APIC and cannot continue.
>
> Is there an (undocumented) option to enable APIC emulation in this
> configuration (qemu-system-x86-64 + kqemu running under Linux 2.6.12 64
> bits) ?
>
> Or did I hit an unsupported case ?
>  
Sigh, people write me private mails about this every month. The problem 
with Win64 is not APIC, but ACPI (which is used to detect Local APIC 
among other things). I've updated version of my hack and experimental 
ACPI implementation from malc_, but even with these patches it's NOT 
POSSIBLE to install Win64. With all the local patches in my tree I'm 
able to get to the second stage setup, but that's all ... it's way too 
slow for some reason (not just normal slowness, but some bug probably).

- Filip