iommu/amd: Don't copy GCR3 table root pointer

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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.

Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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This commit is contained in:

Baoquan He 2017-08-09 16:33:43 +08:00 • committed by Joerg Roedel

parent b336781b82

commit daae2d25a4

5 changed files with 57 additions and 26 deletions

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28

drivers/iommu/amd_iommu.c

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12

drivers/iommu/amd_iommu_init.c

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1

drivers/iommu/amd_iommu_proto.h

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24

drivers/iommu/amd_iommu_types.h

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18

drivers/iommu/amd_iommu_v2.c

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