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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2022-10-31 08:59:05 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-11-03 15:47:43 +0100 |
| commit | 1adf3cc20d693569ebee90fd91fa34b0570fcd6f (patch) | |
| tree | f5cc11fd33eecd6d30284cf119bec1fad5783986 /include/linux/iommu.h | |
| parent | 30a0b95b1335e12efef89dd78518ed3e4a71a763 (diff) | |
| download | lwn-1adf3cc20d693569ebee90fd91fa34b0570fcd6f.tar.gz lwn-1adf3cc20d693569ebee90fd91fa34b0570fcd6f.zip | |
iommu: Add max_pasids field in struct iommu_device
Use this field to keep the number of supported PASIDs that an IOMMU
hardware is able to support. This is a generic attribute of an IOMMU
and lifting it into the per-IOMMU device structure makes it possible
to allocate a PASID for device without calls into the IOMMU drivers.
Any iommu driver that supports PASID related features should set this
field before enabling them on the devices.
In the Intel IOMMU driver, intel_iommu_sm is moved to CONFIG_INTEL_IOMMU
enclave so that the pasid_supported() helper could be used in dmar.c
without compilation errors.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: Tony Zhu <tony.zhu@intel.com>
Link: https://lore.kernel.org/r/20221031005917.45690-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 3c9da1f8979e..e3af4f46e6e0 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -322,12 +322,14 @@ struct iommu_domain_ops { * @list: Used by the iommu-core to keep a list of registered iommus * @ops: iommu-ops for talking to this iommu * @dev: struct device for sysfs handling + * @max_pasids: number of supported PASIDs */ struct iommu_device { struct list_head list; const struct iommu_ops *ops; struct fwnode_handle *fwnode; struct device *dev; + u32 max_pasids; }; /** |