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Re: [Xen-devel] pvops: boot locks up while initialising PCI
| To: | Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Simon Horman <horms@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] pvops: boot locks up while initialising PCI |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 24 Sep 2009 08:26:00 +0100 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Thu, 24 Sep 2009 00:27:40 -0700 |
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| Thread-topic: | [Xen-devel] pvops: boot locks up while initialising PCI |
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On 24/09/2009 00:29, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx> wrote: >> Thanks for the advice with regards to hvc0, that is working well. >> I am now observing a problem while initialising the iommu. >> I have worked around this by setting iommu=off. >> > > Ah, OK, someone else noticed that too. I guess we should inhibit iommu > init somehow. > > Keir, is Xen supposed to disable the DMAR for dom0 by stomping on acpi > or something? Or was that about something else? Xen does this. In 3.4 and earlier it disables it only if Xen has iommu enabled itself. In xen-unstable it nobbles DMAR tables in all cases -- presumably this is Intel's fix for the very issue you are talking about. Probably Intel's fix needs backport to 3.4? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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