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Re: [Xen-devel] iommu support on AMD64
| To: | "Langsdorf, Mark" <mark.langsdorf@xxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] iommu support on AMD64 |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Thu, 29 Sep 2005 23:29:44 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 29 Sep 2005 22:34:58 +0000 |
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On 29 Sep 2005, at 19:41, Langsdorf, Mark wrote: The current aperture.c code in dom0 requires several calls to read_pci_config() to find the AMD northbridge. These calls are causing my system to crash. read_pci_config() is defined in linux-2.6.12-xen0/include/asm-x86_64/pci-direct.h as You probably need to set your IOPL to 1. There's a physdevop hypercall for doing that. We execute it during boot but you may be accessing teh northbridge earlier than that. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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