Re: [PATCH v2] x86, vt-d: enable x2apic opt out

[Woodhouse, David]

On Mon, 2011-05-16 at 21:32 +0100, Alex Williamson wrote:
> Just a guess, but the OEM probably hasn't updated their SMI handlers to
> understand x2apic yet and won't before the product ships because some
> other OS doesn't bother to use x2apic. 

Yay, crappy closed-source BIOS holds back the platform yet again.

>  We can still enable interrupt remapping w/o x2apic though, so I'm
> curious what other irq injection tricks you're referring to.  Thanks,

http://www.invisiblethingslab.com/resources/2011/Software%20Attacks%20on%20Intel%20VT-d.pdf

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@xxxxxxxxx                              Intel Corporation

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