Re: KVM on 440GP

[Corey Minyard <minyard@acm.org>]

Corey Minyard wrote:
> I'm playing around with KVM on an ebony board (440GP), just trying to 
> get it to work, really.  I followed the instructions at 
> http://www.linux-kvm.org/page/PowerPC and I used the 2.6.33 branch of 
> the kvm kernel repository.  When I try to run kvm, qemu appears to 
> abort and actually logs me off.
>
> Doing a little debugging, I found that qemu_memalign() is calling 
> abort because posix_memalign() is failing.  I haven't done any more 
> debugging than that.
Well, I discovered that the default memory is 128M, and that's too much 
memory for a VM running on a machine with 128M.  I fixed that problem, 
and now it's doing something, though no console so not sure what.

I guess my questions below and the patch still apply.

-corey

>
> Since I already had to fix a kernel issue to get it the kernel code to 
> initialize since the platform was reported as ppc440gp, not ppc440, 
> I'm wondering how hard it's going to be to get this working.  Does 
> anyone have this working at all?  Should I back up to a previous 
> version?  Any help would be appreciated.
>
> Thanks,
>
> -corey
>
> Here's the change I made to get kvm in the kernel to initialize:
>
>
> Index: kvm/arch/powerpc/kvm/44x.c
> =================================> --- kvm.orig/arch/powerpc/kvm/44x.c
> +++ kvm/arch/powerpc/kvm/44x.c
> @@ -42,7 +42,7 @@ int kvmppc_core_check_processor_compat(v
> {
>        int r;
>
> -       if (strcmp(cur_cpu_spec->platform, "ppc440") = 0)
> +       if (strncmp(cur_cpu_spec->platform, "ppc440", 6) = 0)
>                r = 0;
>        else
>                r = -ENOTSUPP;
>
>