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| author | Joerg Roedel <jroedel@suse.de> | 2020-08-24 13:54:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-17 14:55:37 +0300 |
| commit | 790303eb397d54deb6d78a9b53521882e37c4c85 (patch) | |
| tree | 109f83d04ceb088ec4300091acff53ee8e4230cd /drivers/iommu | |
| parent | 5aa21abcedd295a4e3338073f09f2c4849f11e39 (diff) | |
| download | linux-790303eb397d54deb6d78a9b53521882e37c4c85.tar.xz | |
iommu/amd: Do not use IOMMUv2 functionality when SME is active
[ Upstream commit 2822e582501b65707089b097e773e6fd70774841 ]
When memory encryption is active the device is likely not in a direct
mapped domain. Forbid using IOMMUv2 functionality for now until finer
grained checks for this have been implemented.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200824105415.21000-3-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd/iommu_v2.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iommu/amd/iommu_v2.c b/drivers/iommu/amd/iommu_v2.c index e4b025c5637c..5a188cac7a0f 100644 --- a/drivers/iommu/amd/iommu_v2.c +++ b/drivers/iommu/amd/iommu_v2.c @@ -737,6 +737,13 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids) might_sleep(); + /* + * When memory encryption is active the device is likely not in a + * direct-mapped domain. Forbid using IOMMUv2 functionality for now. + */ + if (mem_encrypt_active()) + return -ENODEV; + if (!amd_iommu_v2_supported()) return -ENODEV; |