diff options
| author | Lu Baolu | 2020-11-25 09:41:24 +0800 |
|---|---|---|
| committer | Will Deacon | 2020-11-25 12:07:32 +0000 |
| commit | e2be2a833ab5338fa5b8b99ba622b911d96f1795 (patch) | |
| tree | c65b2fb1027a09586745f80df210cb8e2c72fc96 /scripts/tracing | |
| parent | 77c38c8cf52ef715bfc5cab3d14222d4f3e776e2 (diff) | |
x86/tboot: Don't disable swiotlb when iommu is forced on
After commit 327d5b2fee91c ("iommu/vt-d: Allow 32bit devices to uses DMA
domain"), swiotlb could also be used for direct memory access if IOMMU
is enabled but a device is configured to pass through the DMA translation.
Keep swiotlb when IOMMU is forced on, otherwise, some devices won't work
if "iommu=pt" kernel parameter is used.
Fixes: 327d5b2fee91 ("iommu/vt-d: Allow 32bit devices to uses DMA domain")
Reported-and-tested-by: Adrian Huang <ahuang12@lenovo.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20201125014124.4070776-1-baolu.lu@linux.intel.com
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=210237
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'scripts/tracing')
0 files changed, 0 insertions, 0 deletions