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| author | Sai Prakash Ranjan <quic_saipraka@quicinc.com> | 2022-07-08 15:12:30 +0530 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-07-08 14:15:52 +0100 |
| commit | b9b721d117e9d360ba693e75ba6b9262dfcdf9e2 (patch) | |
| tree | 0af7948c915c31a93dc2486a1714e2efa96e30aa /drivers/iommu/Kconfig | |
| parent | 3482c0b7307365fa9d00cfc1040ff8c39bb8604e (diff) | |
| download | linux-stable-b9b721d117e9d360ba693e75ba6b9262dfcdf9e2.tar.gz linux-stable-b9b721d117e9d360ba693e75ba6b9262dfcdf9e2.tar.bz2 linux-stable-b9b721d117e9d360ba693e75ba6b9262dfcdf9e2.zip | |
iommu/arm-smmu-qcom: Add debug support for TLB sync timeouts
TLB sync timeouts can be due to various reasons such as TBU power down
or pending TCU/TBU invalidation/sync and so on. Debugging these often
require dumping of some implementation defined registers to know the
status of TBU/TCU operations and some of these registers are not
accessible in non-secure world such as from kernel and requires SMC
calls to read them in the secure world. So, add this debug support
to dump implementation defined registers for TLB sync timeout issues.
Signed-off-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220708094230.4349-1-quic_saipraka@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index c79a0df090c0..5c5cb5bee8b6 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -363,6 +363,16 @@ config ARM_SMMU_QCOM When running on a Qualcomm platform that has the custom variant of the ARM SMMU, this needs to be built into the SMMU driver. +config ARM_SMMU_QCOM_DEBUG + bool "ARM SMMU QCOM implementation defined debug support" + depends on ARM_SMMU_QCOM + help + Support for implementation specific debug features in ARM SMMU + hardware found in QTI platforms. + + Say Y here to enable debug for issues such as TLB sync timeouts + which requires implementation defined register dumps. + config ARM_SMMU_V3 tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support" depends on ARM64 |