iommu: Add "iommu.strict" command line option

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Add a generic command line option to enable lazy unmapping via IOVA
flush queues, which will initally be suuported by iommu-dma. This echoes
the semantics of "intel_iommu=strict" (albeit with the opposite default
value), but in the driver-agnostic fashion of "iommu.passthrough".

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
[rm: move handling out of SMMUv3 driver, clean up documentation]
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[will: dropped broken printk when parsing command-line option]
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Zhen Lei 2018-09-20 17:10:23 +01:00 • committed by Will Deacon

parent 2da274cdf9

commit 68a6efe86f

2 changed files with 26 additions and 0 deletions

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12

Documentation/admin-guide/kernel-parameters.txt

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14

drivers/iommu/iommu.c

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