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| author | Joerg Roedel <joro@8bytes.org> | 2012-12-02 15:35:37 +0100 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2012-12-02 16:07:38 +0100 |
| commit | 954e3dd8308501bb00cae4ed655968282dc65314 (patch) | |
| tree | 09bc84f6fc5a2907d637a48e82e36671317afd55 /drivers/iommu/amd_iommu.c | |
| parent | 78bfa9f395f6bbab168b83f69b99659818517b02 (diff) | |
iommu/amd: Don't use 512GB pages
There is a bug in the hardware that will be triggered when
this page size is used. Make sure this does not happen.
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index cb63cc5d94d7..98d74ab564b6 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -66,8 +66,10 @@ * * If at some point we'd like to utilize the IOMMU core's new behavior, * we could change this to advertise the real page sizes we support. + * + * 512GB Pages are not supported due to a hardware bug */ -#define AMD_IOMMU_PGSIZES (~0xFFFUL) +#define AMD_IOMMU_PGSIZES ((~0xFFFUL) & ~(2ULL << 38)) static DEFINE_RWLOCK(amd_iommu_devtable_lock); |