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authorJoerg Roedel <joro@8bytes.org>2012-12-02 09:40:56 -0500
committerJoerg Roedel <joro@8bytes.org>2012-12-02 10:07:43 -0500
commit310aa95078443c7b7b56c60dbc55b7a11b946edb (patch)
tree1557afb4070dafb59b4c1004ed4b7b38539cc868 /drivers/iommu
parent954e3dd8308501bb00cae4ed655968282dc65314 (diff)
iommu/amd: Remove obsolete comment
The AMD IOMMU driver only uses the page-sizes it gets from IOMMU core and uses the appropriate page-size. So this comment is not necessary. Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 98d74ab564b..c1c74e030a5 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -57,16 +57,6 @@
57 * physically contiguous memory regions it is mapping into page sizes 57 * physically contiguous memory regions it is mapping into page sizes
58 * that we support. 58 * that we support.
59 * 59 *
60 * Traditionally the IOMMU core just handed us the mappings directly,
61 * after making sure the size is an order of a 4KiB page and that the
62 * mapping has natural alignment.
63 *
64 * To retain this behavior, we currently advertise that we support
65 * all page sizes that are an order of 4KiB.
66 *
67 * If at some point we'd like to utilize the IOMMU core's new behavior,
68 * we could change this to advertise the real page sizes we support.
69 *
70 * 512GB Pages are not supported due to a hardware bug 60 * 512GB Pages are not supported due to a hardware bug
71 */ 61 */
72#define AMD_IOMMU_PGSIZES ((~0xFFFUL) & ~(2ULL << 38)) 62#define AMD_IOMMU_PGSIZES ((~0xFFFUL) & ~(2ULL << 38))