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Subject: Re: [PATCH -v8] x86: Disable x2apic if nox2apic is specified or
 intr-remap can not be enabled
From: Suresh Siddha <suresh.b.siddha@intel.com>
Reply-To: Suresh Siddha <suresh.b.siddha@intel.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
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Date: Mon, 19 Dec 2011 22:54:01 -0800
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On Fri, 2011-12-16 at 18:07 -0800, Suresh Siddha wrote:
> b. for nox2apic, as you try to disable x2apic even if the bios has
> enabled it along with interrupt-remapping, this will probably not work
> unless we disable interrupt-remapping.

Looking at the code, this condition should be handled correctly by the
OS by enabling interrupt-remapping in non extended interrupt-mode. So
this case should be ok.

thanks,
suresh