diff options
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index a382d7a73eaa..07ae8b93887e 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2659,7 +2659,12 @@ static int amd_iommu_def_domain_type(struct device *dev) if (!dev_data) return 0; - if (dev_data->iommu_v2) + /* + * Do not identity map IOMMUv2 capable devices when memory encryption is + * active, because some of those devices (AMD GPUs) don't have the + * encryption bit in their DMA-mask and require remapping. + */ + if (!mem_encrypt_active() && dev_data->iommu_v2) return IOMMU_DOMAIN_IDENTITY; return 0; |