Commit 03bfadfb authored Nov 03, 2017 by Gary R Hook Committed by Greg Kroah-Hartman Dec 20, 2017

iommu/amd: Limit the IOVA page range to the specified addresses




[ Upstream commit b92b4fb5c14257c0e7eae291ecc1f7b1962e1699 ]

The extent of pages specified when applying a reserved region should
include up to the last page of the range, but not the page following
the range.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Fixes: 8d54d6c8 ('iommu/amd: Implement apply_dm_region call-back')
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent cb0acb37

drivers/iommu/amd_iommu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3211,7 +3211,7 @@ static void amd_iommu_apply_dm_region(struct device *dev,
		unsigned long start, end;

		start = IOVA_PFN(region->start);
		end = IOVA_PFN(region->start + region->length);
		end = IOVA_PFN(region->start + region->length - 1);

		WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL);
		}