iommu/amd: Detect pre enabled translation
Add functions to check whether translation is already enabled in IOMMU. Signed-off-by: NBaoquan He <bhe@redhat.com> Signed-off-by: NJoerg Roedel <jroedel@suse.de>
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Add functions to check whether translation is already enabled in IOMMU. Signed-off-by: NBaoquan He <bhe@redhat.com> Signed-off-by: NJoerg Roedel <jroedel@suse.de>