Hi,
here is a small patch-set to disable IOMMU Passthrough mode when SME is
active even when CONFIG_IOMMU_DEFAULT_PASSTHROUGH=y is set.
The reason for that change is that SME with passthrough mode turned out
to be fragile with devices requiring SWIOTLB, mainly because SWIOTLB has
a maximum allocation size of 256kb and a limit overall size of the
bounce buffer.
Therefore having IOMMU in translation mode by default is better when SME
is active on a system.
Please review.
Thanks,
Joerg
Joerg Roedel (3):
iommu: Print default domain type on boot
iommu: Set default domain type at runtime
iommu: Disable passthrough mode when SME is active
drivers/iommu/iommu.c | 48 +++++++++++++++++++++++++++++++++++++------
1 file changed, 42 insertions(+), 6 deletions(-)
--
2.17.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
