iommu/vt-d: Copy translation tables from old kernel

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If we are in a kdump kernel and find translation enabled in
the iommu, try to copy the translation tables from the old
kernel to preserve the mappings until the device driver
takes over.
This supports old and the extended root-entry and
context-table formats.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Joerg Roedel 2015-06-12 11:56:10 +02:00

parent 4158c2eca3

commit 091d42e43d

1 changed files with 205 additions and 2 deletions

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drivers/iommu/intel-iommu.c

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