linux-kernel - Re: Latest tip kernel(3.2-rc1-tip_cf6b3899) fails to boot on x3850x5 machine

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Date:	Thu, 15 Dec 2011 11:16:54 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Joerg Roedel <joerg.roedel@....com>
Subject: Re: Latest tip kernel(3.2-rc1-tip_cf6b3899) fails to boot on x3850x5 machine

On Wed, Dec 14, 2011 at 11:19 PM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Yinghai Lu <yinghai@...nel.org> wrote:
>
>> On Wed, Dec 14, 2011 at 6:24 PM, Nikunj A Dadhania
>> <nikunj@...ux.vnet.ibm.com> wrote:
>> >>
>> >> BIOS pre-enabled x2apic, and kernel config does not have x2apic enabled?
>> > make oldconfig somehow skipped this!! I can see my previous kernel config
>> > having this enabled.
>>
>> looks like recent dmar table related DMAR changing cause that.
>
> Which one would that be? Perhaps:
>
>      iommu: Rename the DMAR and INTR_REMAP config options
>
> ? They then need to be fixed if it can be done sanely.

yes.

@@ -287,7 +287,7 @@ config SMP

 config X86_X2APIC
        bool "Support x2apic"
-       depends on X86_LOCAL_APIC && X86_64 && INTR_REMAP
+       depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP
        ---help---
          This enables x2apic support on CPUs that have this feature.


renaming INTR_REMAP IRQ_REMAP cause that.

Attached patch should fix the problem.

Thanks

Yinghai

View attachment "x2apic_select_irq_remap_again.patch" of type "text/x-patch" (1186 bytes)