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[Xen-devel] details of iommu_inclusive_mapping problem?


  • To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Andrew Lyon <andrew.lyon@xxxxxxxxx>
  • Date: Wed, 2 Sep 2009 20:40:46 +0100
  • Delivery-date: Wed, 02 Sep 2009 12:42:04 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Hi,

On my Supermicro X7DWA-N board I have to boot Xen with iommu_inclusive_mapping=y to use iommu, I have had some stability problems when using passthru and I wonder if that is because I am using this workaround so I contacted Supermicro about it and they asked me for details of exactly which registers are wrong, I am not able to provide this information, can anybody explain how I might work out exactly what is wrong so that I can tell them?

From what I have read the problem is that the rmrr memory ranges are not within reserved memory, I know how to work out the rmrr start and length from acpidump but I don't know how to work out the reserved ranges, which table are they in?

Andy

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