Messages in this thread | | | Date | Sat, 2 Feb 2008 10:55:06 +0800 | From | "Jike Song" <> | Subject | Re: What's the status of x2APIC support in Linux kernel? |
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On 2/1/08, Andi Kleen <andi@firstfloor.org> wrote:
> There are right no CPUs shipping which implement x2apic. Thanks for your information.
> "Jike Song" <albcamus@gmail.com> writes: > > Maybe. I have a question as well, what about the status of I/O > > xAPIC support in linux? If it is not supported yet, is there any > > effort to add it? I'm interested in that, hopefully can take part in > > the development. > > xAPIC has been supported forever.
Thank you for your attention, Andi.
Oh, what do I mean is "I/O xAPIC", but not the "local xAPIC" or xAPIC interrupt architecture introduced by Intel Pentium4 CPU. It seems that the "I/O xAPIC" hasn't been well documented yet, but some other document do have some description about it. Some Intel guys gave me an URL for the document:
http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf
Section 5 and section 9.5 describe 'I/OxAPIC'. I'm not sure if it is already supported by Linux, I guess it is not.
-- Best Regards, Jike
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