[Linux-PowerEdge] BIOS interrupt remapping = broken on PE610's et al?

Linda A. Walsh dell at tlinx.org
Mon Sep 30 23:08:05 CDT 2013

Has anyone else been hit by this yet? I have a PE-T610 that has an

affected part.
I don't suppose it's possible to replace the part?   Is dell coming out 
with a bios patch to
disable the remapping?

Erratum 69 for the Intel X58 chipset states that (for the context of 
VT-d) the BIOS should disable that chipset's interrupt remapping capability.

However, the current BIOS SOX5810J.86A.5600.2013.0729.2250 does not do so.

When booting a current Linux kernel (here: 3.10.7), this problem is 
detected and corrected during boot:

[ 0.009193] WARNING: at drivers/iommu/intel_irq_remapping.c:533 

[ 0.009333] This system BIOS has enabled interrupt remapping

on a chipset that contains an erratum making that

feature unstable. To maintain system stability

interrupt remapping is being disabled. Please

contact your BIOS vendor for an update

[ 0.009622] Modules linked in:

[ 0.009739] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.7-gentoo #2

[ 0.009833] Hardware name: /DX58SO, BIOS 
SOX5810J.86A.5600.2013.0729.2250 07/29/2013

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