Messages in this thread | | | Date | Fri, 13 Oct 2023 12:23:00 +0800 | Subject | Re: [PATH v4 0/3] iommu/vt-d: debugfs: Enhancements to IOMMU debugfs | From | Baolu Lu <> |
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On 10/11/23 4:39 PM, Jingqi Liu wrote: > The original debugfs only dumps all IOMMU page tables without pasid > supported. It traverses all devices on the pci bus, then dumps all page > tables based on device domains. This traversal is from software > perspective. This series dumps page tables whose mappings are created > and destroyed by the iommu_map/unmap() interfaces, by traversing root > tables, context tables, pasid directories and pasid tables from hardware > perspective. It supports dumping a specified page table in legacy mode > or scalable mode with or without a specified pasid. It adds a debugfs > directory per pair of {device, pasid} when attaching device with pasid, > i.e. /sys/kernel/debug/iommu/intel/<device source id>/<pasid>. And > create a debugfs file in the directory for users to dump the page table > corresponding to {device, pasid}. e.g. > /sys/kernel/debug/iommu/intel/0000:00:02.0/1/domain_translation_struct. > For the default domain without pasid, it creates a debugfs file in the > debugfs device directory for users to dump its page table. e.g. > /sys/kernel/debug/iommu/intel/0000:00:02.0/domain_translation_struct. > Remove the corresponding debugfs directory and file when detaching or > releasing a device. For legacy mode, according to bus number and DEVFN, > traverse the root table and context table to get the pointer of page > table in the context table entry, then dump the specified page table. > For scalable mode, according to bus number, DEVFN and pasid, traverse > the root table, context table, pasid directory and pasid table to get > the pointer of page table in the pasid table entry, then dump the > specified page table. Examples are as follows: 1) Dump the page table of > device "0000:00:01.0" that only supports legacy mode. $ sudo cat > /sys/kernel/debug/iommu/intel/0000:00:01.0/domain_translation_struct 2) > Dump the page table of device "0000:00:02.0" with PASID "1" that > supports scalable mode. $ sudo cat > /sys/kernel/debug/iommu/intel/0000:00:0a.0/1/domain_translation_struct
This series doesn't apply to v6.6-rc5. Can you please rebase and send a new version?
Best regards, baolu
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