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Re: [Xen-devel] iommu: mapping reserved region failed - Q35 -VT-DIssue

Ross Philipson schrieb:
> Attached is a printout of your DMAR tables. Focusing on the following 
> failures that occurred later in the boot process:
> (XEN) domain_context_mapping: can't find drhd for device (bus=0 dev=1f func=2)
> (XEN) [VT-D]iommu.c:1545:d0 intel_iommu_add_device: context mapping failed
> (XEN) domain_context_mapping: can't find drhd for device (bus=0 dev=1f func=5)
> (XEN) [VT-D]iommu.c:1545:d0 intel_iommu_add_device: context mapping failed
> The DMAR only has two DRHD with 1 and 3 scope entries respectively for device 
> endpoints (covering devices 00:1b.0, 00:03.0, 00:03.2, 00:03.3). There are no 
> scope entries for entire bridges and there is not an INCLUDE_ALL DRHD. This 
> is what is causing the failure - no match. It seems odd to me that there are 
> so few entries.

Is there anything i can do to work on that problem further?



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