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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Han, Weidong
2009-Sep-06 11:45 UTC
RE: [Xen-devel] details of iommu_inclusive_mapping problem?
Andrew Lyon wrote:> 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? >You can see the reserved ranges in e820 table. I think you can send the RMRR ranges and e820 table to them. Actually it''s a BIOS issue. Pls try the latest BIOS first if you are not using it. Regards, Weidong _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel