Re: What's the status of x2APIC support in Linux kernel?

Bjorn Helgaas
2008-02-14T19:05:18Z

On Friday 01 February 2008 11:08:23 am Siddha, Suresh B wrote:
> On Fri, Feb 01, 2008 at 01:17:14PM +0100, Andi Kleen wrote:
> > "Jike Song" <albcamus@gmail.com> writes:
> >
> > > On 2/1/08, Rijndael Cosque <rijcos@gmail.com> wrote:
> > >> Hi all,
> > >>
> > >> I found the x2APIC spec via http://www.intel.com/products/processor/manuals/.
> > >>
> > >> Looks at present there is no x2APIC support in Linux kernel 2.6.24?
> > >>
> > >> Is there any experimental patch available for Linux kernel? -- I
> > >> googled "x2APIC Linux"; looks no patch for now?
> >
> > There are right no CPUs shipping which implement x2apic.
>
> That's correct. None of the released CPU's support it.
>
> I am working on a patch enabling these future x2apic extensions and the plan
> is to post this kernel patch shortly.

Are you adding x2apic support for both x86 and ia64, or only for x86?

Bjorn