diff options
| author | Georgi Djakov <quic_c_gdjako@quicinc.com> | 2024-04-17 16:37:26 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-04-18 17:48:01 +0300 |
| commit | 414ecb030870a31262e5fd29fd372ee73b32a6be (patch) | |
| tree | af27a6b5fd5a7df13b87cf96bfdb32de392584af /drivers/iommu/Kconfig | |
| parent | 54a75d8f14c5ecb6636942765f976fb4633e010c (diff) | |
| download | linux-414ecb030870a31262e5fd29fd372ee73b32a6be.tar.xz | |
iommu/arm-smmu-qcom-debug: Add support for TBUs
Operating the TBUs (Translation Buffer Units) from Linux on Qualcomm
platforms can help with debugging context faults. To help with that,
the TBUs can run ATOS (Address Translation Operations) to manually
trigger address translation of IOVA to physical address in hardware
and provide more details when a context fault happens.
The driver will control the resources needed by the TBU to allow
running the debug operations such as ATOS, check for outstanding
transactions, do snapshot capture etc.
Signed-off-by: Georgi Djakov <quic_c_gdjako@quicinc.com>
Link: https://lore.kernel.org/r/20240417133731.2055383-3-quic_c_gdjako@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 0af39bbbe3a3..0ac80e1094f3 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -379,10 +379,14 @@ config ARM_SMMU_QCOM_DEBUG 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. + hardware found in QTI platforms. This include support for + the Translation Buffer Units (TBU) that can be used to obtain + additional information when debugging memory management issues + like context faults. + + Say Y here to enable debug for issues such as context faults + or TLB sync timeouts which requires implementation defined + register dumps. config ARM_SMMU_V3 tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support" |