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| author |   Lu Baolu <baolu.lu@linux.intel.com> | 2018-07-14 15:46:59 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2018-07-20 14:44:24 +0200 |
| commit | cc580e41260dbf1a46269235f1f2b572137d9d03 (patch) | |
| tree | 059b05cf142c60158f0e70a78d59eed717d13561 /drivers/iommu/intel-pasid.h | |
| parent | iommu/vt-d: Add for_each_device_domain() helper (diff) | |
| download | linux-dev-cc580e41260dbf1a46269235f1f2b572137d9d03.tar.xz linux-dev-cc580e41260dbf1a46269235f1f2b572137d9d03.zip | |
iommu/vt-d: Per PCI device pasid table interfaces
This patch adds the interfaces for per PCI device pasid
table management. Currently we allocate one pasid table
for all PCI devices under the scope of an IOMMU. It's
insecure in some cases where multiple devices under one
single IOMMU unit support PASID features. With per PCI
device pasid table, we can achieve finer protection and
isolation granularity.
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Suggested-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel-pasid.h')
| -rw-r--r-- | drivers/iommu/intel-pasid.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iommu/intel-pasid.h b/drivers/iommu/intel-pasid.h index b1c5296290e5..1c05ed6fc5a5 100644 --- a/drivers/iommu/intel-pasid.h +++ b/drivers/iommu/intel-pasid.h @@ -13,9 +13,27 @@ #define PASID_MIN 0x1 #define PASID_MAX 0x100000 +struct pasid_entry { + u64 val; +}; + +/* The representative of a PASID table */ +struct pasid_table { + void *table; /* pasid table pointer */ + int order; /* page order of pasid table */ + int max_pasid; /* max pasid */ + struct list_head dev; /* device list */ +}; + extern u32 intel_pasid_max_id; int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp); void intel_pasid_free_id(int pasid); void *intel_pasid_lookup_id(int pasid); +int intel_pasid_alloc_table(struct device *dev); +void intel_pasid_free_table(struct device *dev); +struct pasid_table *intel_pasid_get_table(struct device *dev); +int intel_pasid_get_dev_max_id(struct device *dev); +struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid); +void intel_pasid_clear_entry(struct device *dev, int pasid); #endif /* __INTEL_PASID_H */ |