iommu/arm-smmu-qcom: Add stall support

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Add, via the adreno-smmu-priv interface, a way for the GPU to request
the SMMU to stall translation on faults, and then later resume the
translation, either retrying or terminating the current translation.

This will be used on the GPU side to "freeze" the GPU while we snapshot
useful state for devcoredump.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Jordan Crouse <jordan@cosmicpenguin.net>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210610214431.539029-5-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>

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Rob Clark 2021-06-10 14:44:12 -07:00

parent 2a574cc05d

commit ba6014a4e4

2 changed files with 40 additions and 0 deletions

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include/linux/adreno-smmu-priv.h

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