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| author | Jingqi Liu <Jingqi.liu@intel.com> | 2023-10-16 11:28:29 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-10-16 09:34:51 +0200 |
| commit | d87731f609318a27e9aa3d01cf97798599d32839 (patch) | |
| tree | 8f74ffdd054f9e1ef31556f20535f7d89d0e5c49 /drivers/iommu/intel/iommu.h | |
| parent | e8aa45f8cc2c3afe2a3608ea7220bbdb516bef07 (diff) | |
| download | linux-d87731f609318a27e9aa3d01cf97798599d32839.tar.gz linux-d87731f609318a27e9aa3d01cf97798599d32839.tar.bz2 linux-d87731f609318a27e9aa3d01cf97798599d32839.zip | |
iommu/vt-d: debugfs: Create/remove debugfs file per {device, pasid}
Add a debugfs directory per pair of {device, pasid} if the mappings of
its page table are created and destroyed by the iommu_map/unmap()
interfaces. i.e. /sys/kernel/debug/iommu/intel/<device source id>/<pasid>.
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.
When setting a domain to a PASID of device, create a debugfs file in
the pasid debugfs directory for users to dump the page table of the
specified pasid. Remove the debugfs device directory of the device
when releasing a device. e.g.
/sys/kernel/debug/iommu/intel/0000:00:01.0
Signed-off-by: Jingqi Liu <Jingqi.liu@intel.com>
Link: https://lore.kernel.org/r/20231013135811.73953-3-Jingqi.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel/iommu.h')
| -rw-r--r-- | drivers/iommu/intel/iommu.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index c18fb699c87a..43ecda2ac11d 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -716,12 +716,18 @@ struct device_domain_info { struct intel_iommu *iommu; /* IOMMU used by this device */ struct dmar_domain *domain; /* pointer to domain */ struct pasid_table *pasid_table; /* pasid table */ +#ifdef CONFIG_INTEL_IOMMU_DEBUGFS + struct dentry *debugfs_dentry; /* pointer to device directory dentry */ +#endif }; struct dev_pasid_info { struct list_head link_domain; /* link to domain siblings */ struct device *dev; ioasid_t pasid; +#ifdef CONFIG_INTEL_IOMMU_DEBUGFS + struct dentry *debugfs_dentry; /* pointer to pasid directory dentry */ +#endif }; static inline void __iommu_flush_cache( @@ -883,8 +889,16 @@ static inline void intel_svm_remove_dev_pasid(struct device *dev, ioasid_t pasid #ifdef CONFIG_INTEL_IOMMU_DEBUGFS void intel_iommu_debugfs_init(void); +void intel_iommu_debugfs_create_dev(struct device_domain_info *info); +void intel_iommu_debugfs_remove_dev(struct device_domain_info *info); +void intel_iommu_debugfs_create_dev_pasid(struct dev_pasid_info *dev_pasid); +void intel_iommu_debugfs_remove_dev_pasid(struct dev_pasid_info *dev_pasid); #else static inline void intel_iommu_debugfs_init(void) {} +static inline void intel_iommu_debugfs_create_dev(struct device_domain_info *info) {} +static inline void intel_iommu_debugfs_remove_dev(struct device_domain_info *info) {} +static inline void intel_iommu_debugfs_create_dev_pasid(struct dev_pasid_info *dev_pasid) {} +static inline void intel_iommu_debugfs_remove_dev_pasid(struct dev_pasid_info *dev_pasid) {} #endif /* CONFIG_INTEL_IOMMU_DEBUGFS */ extern const struct attribute_group *intel_iommu_groups[]; |