Messages in this thread | | | Date | Thu, 27 Jul 2017 17:57:55 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer |
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On Fri, Jul 21, 2017 at 04:59:09PM +0800, Baoquan He wrote: > When iommu is pre_enabled in kdump kernel, if a device is set up with > guest translations (DTE.GV=1), then don't copy GCR3 table root pointer > but move the device over to an empty guest-cr3 table and handle the > faults in the PPR log (which answer them with INVALID). After all these > PPR faults are recoverable for the device and we should not allow the > device to change old-kernels data when we don't have to.
Okay, forget my previous comment about disabling IOMMUv2 features while copying. Its done in this patch.
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