[Xen-devel] details of iommu_inclusive_mapping problem?

[Andrew Lyon <andrew.lyon@xxxxxxxxx>]

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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