iommu/arm-smmu-v3: Get associated RMR info and install bypass STE

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Check if there is any RMR info associated with the devices behind
the SMMUv3 and if any, install bypass STEs for them. This is to
keep any ongoing traffic associated with these devices alive
when we enable/reset SMMUv3 during probe().

Tested-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220615101044.1972-9-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Shameer Kolothum 2022-06-15 11:10:43 +01:00 • committed by Joerg Roedel

parent 6c998abb1e

commit 9bdbdaa3c4

1 changed files with 33 additions and 0 deletions

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drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

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