On Fri, Mar 05, 2021 at 04:32:34PM +0000, Robin Murphy wrote:
> In converting intel-iommu over to the common IOMMU DMA ops, it quietly
> lost the functionality of its "forcedac" option. Since this is a handy
> thing both for testing and for performance optimisation on certain
> platforms, reimplement it under the common IOMMU parameter namespace.
>
> For the sake of fixing the inadvertent breakage of the Intel-specific
> parameter, remove the dmar_forcedac remnants and hook it up as an alias
> while documenting the transition to the new common parameter.
>
> Fixes: c588072bba6b ("iommu/vt-d: Convert intel iommu driver to the iommu
> ops")
> Signed-off-by: Robin Murphy <robin.mur...@arm.com>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 15 ++++++++-------
> drivers/iommu/dma-iommu.c | 13 ++++++++++++-
> drivers/iommu/intel/iommu.c | 5 ++---
> include/linux/dma-iommu.h | 2 ++
> 4 files changed, 24 insertions(+), 11 deletions(-)
Applied for v5.13, thanks.
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