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Iommuv3 debug #132
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Iommuv3 debug #132
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Export arm_smmu_get_cd_ptr and arm_smmu_get_step_for_sid to let debug interface to get related cd and ste. Signed-off-by: Zhou Wang <[email protected]>
Export page table walk needed functions and macros, then page table dump in later debug interface could be used directly. Signed-off-by: Zhou Wang <[email protected]>
This patch adds debug interfaces for SMMUv3 driver in sysfs. It adds debug related files under /sys/kernel/debug/iommu/smmuv3. User should firstly set device and pasid to pci_dev and pasid by: (currently only support PCI device) echo <domain>:<bus>:<dev>.<fun> > /sys/kernel/debug/iommu/smmuv3/pci_dev echo <pasid> > /sys/kernel/debug/iommu/smmuv3/pasid Then value in cd and ste can be got by: cat /sys/kernel/debug/iommu/smmuv3/ste cat /sys/kernel/debug/iommu/smmuv3/cd S1 and S2 page tables can be got by: cat /sys/kernel/debug/iommu/smmuv3/pt_dump_s1 cat /sys/kernel/debug/iommu/smmuv3/pt_dump_s2 For ste, cd and page table, related device and pasid are set in pci_dev and pasid files as above. Signed-off-by: Zhou Wang <[email protected]>
Signed-off-by: Bobo <[email protected]>
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