[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Multi-bridged PCIe devices (Was: Re: iommuu/vt-d issues with LSI MegaSAS (PERC5i))
I found this: http://lists.xen.org/archives/html/xen-devel/2010-06/msg00093.html while looking for a solution to a similar problem. I am facing a similar issue with LSI (8408E, 3081E-R) and Adaptec (31605) SAS cards. Was there ever a proper, more general fix or workaround for this issue? These SAS cards experience these problems in dom0. When running a vanilla kernel on bare metal, they work OK without intel_iommu set. As soon as I set intel_iommu, the same thing happens (on bare metal, not dom0). Clearly there is something badly broken with multiple layers of bridges when it comes to IOMMU in my setup (Intel 5520 PCIe root hub -> NF200 bridge -> Intel 80333 Bridge -> SAS controller) I tried iommu=dom0-passthrough and it doesn't appear to have helped. I am not seeing similar problems with other PCIe devices that are also, in theory doing DMA (e.g. GPUs), but LSI and Adapted controllers appear to be affected for some reason. Is there anything else I could try/do to make this work? Gordan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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