tree 3237079d42bd27c0adcedb2177808c19513bda66
parent 5145afc851adb202fb74f48d5c88fb45a5f78712
author Yonghyun Hwang <yonghyun@google.com> 1582749006 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1584691665 +0100

iommu/vt-d: Fix a bug in intel_iommu_iova_to_phys() for huge page

commit 77a1bce84bba01f3f143d77127b72e872b573795 upstream.

intel_iommu_iova_to_phys() has a bug when it translates an IOVA for a huge
page onto its corresponding physical address. This commit fixes the bug by
accomodating the level of page entry for the IOVA and adds IOVA's lower
address to the physical address.

Cc: <stable@vger.kernel.org>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Yonghyun Hwang <yonghyun@google.com>
Fixes: 3871794642579 ("VT-d: Changes to support KVM")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>