[OE-core] Fix for the APIC hangs in qemux86-64

[Bruce Ashfield]

On 12/13/2017 07:34 AM, Richard Purdie wrote:
> Hi Bruce,
> 
> https://bugzilla.yoctoproject.org/show_bug.cgi?id=12301
> 
> We've root caused the hangs we're seeing in qemux86-64 on our
> autobuilder workers. We've identified a commit on 4.15-rc3 which fixes
> the issue but backporting it to the autobuilder's host kernels will be
> a pain.
> 
> As a workaround I'd like to enable x2apic on qemux86-64. Since that
> works via MSRs it avoids the problem.
> 
> Would it be a big issue to set CONFIG_X86_X2APIC=y for qemux86-64?

Nope. No big deal at all. I've used the same config i the past
when doing work with rt-KVM, so I know it well.

I'll prep a commit, and send it along as part of a rebased set
of kernel patches.

Cheers,

Bruce

> 
> Cheers,
> 
> Richard
> 
> 
>