@@ -2171,6 +2171,73 @@ int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, struct device *dev
}
EXPORT_SYMBOL_GPL(iommu_uapi_sva_unbind_gpasid);
+int iommu_attach_pasid_table(struct iommu_domain *domain,
+ struct iommu_pasid_table_config *cfg)
+{
+ if (unlikely(!domain->ops->attach_pasid_table))
+ return -ENODEV;
+
+ return domain->ops->attach_pasid_table(domain, cfg);
+}
+
+int iommu_uapi_attach_pasid_table(struct iommu_domain *domain,
+ void __user *uinfo)
+{
+ struct iommu_pasid_table_config pasid_table_data = { 0 };
+ u32 minsz;
+
+ if (unlikely(!domain->ops->attach_pasid_table))
+ return -ENODEV;
+
+ /*
+ * No new spaces can be added before the variable sized union, the
+ * minimum size is the offset to the union.
+ */
+ minsz = offsetof(struct iommu_pasid_table_config, vendor_data);
+
+ /* Copy minsz from user to get flags and argsz */
+ if (copy_from_user(&pasid_table_data, uinfo, minsz))
+ return -EFAULT;
+
+ /* Fields before the variable size union are mandatory */
+ if (pasid_table_data.argsz < minsz)
+ return -EINVAL;
+
+ /* PASID and address granu require additional info beyond minsz */
+ if (pasid_table_data.version != PASID_TABLE_CFG_VERSION_1)
+ return -EINVAL;
+ if (pasid_table_data.format == IOMMU_PASID_FORMAT_SMMUV3 &&
+ pasid_table_data.argsz <
+ offsetofend(struct iommu_pasid_table_config, vendor_data.smmuv3))
+ return -EINVAL;
+
+ /*
+ * User might be using a newer UAPI header which has a larger data
+ * size, we shall support the existing flags within the current
+ * size. Copy the remaining user data _after_ minsz but not more
+ * than the current kernel supported size.
+ */
+ if (copy_from_user((void *)&pasid_table_data + minsz, uinfo + minsz,
+ min_t(u32, pasid_table_data.argsz, sizeof(pasid_table_data)) - minsz))
+ return -EFAULT;
+
+ /* Now the argsz is validated, check the content */
+ if (pasid_table_data.config < 1 && pasid_table_data.config > 3)
+ return -EINVAL;
+
+ return domain->ops->attach_pasid_table(domain, &pasid_table_data);
+}
+EXPORT_SYMBOL_GPL(iommu_uapi_attach_pasid_table);
+
+void iommu_detach_pasid_table(struct iommu_domain *domain)
+{
+ if (unlikely(!domain->ops->detach_pasid_table))
+ return;
+
+ domain->ops->detach_pasid_table(domain);
+}
+EXPORT_SYMBOL_GPL(iommu_detach_pasid_table);
+
static void __iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
@@ -223,6 +223,8 @@ struct iommu_iotlb_gather {
* @cache_invalidate: invalidate translation caches
* @sva_bind_gpasid: bind guest pasid and mm
* @sva_unbind_gpasid: unbind guest pasid and mm
+ * @attach_pasid_table: attach a pasid table
+ * @detach_pasid_table: detach the pasid table
* @def_domain_type: device default domain type, return value:
* - IOMMU_DOMAIN_IDENTITY: must use an identity domain
* - IOMMU_DOMAIN_DMA: must use a dma domain
@@ -287,6 +289,9 @@ struct iommu_ops {
void *drvdata);
void (*sva_unbind)(struct iommu_sva *handle);
u32 (*sva_get_pasid)(struct iommu_sva *handle);
+ int (*attach_pasid_table)(struct iommu_domain *domain,
+ struct iommu_pasid_table_config *cfg);
+ void (*detach_pasid_table)(struct iommu_domain *domain);
int (*page_response)(struct device *dev,
struct iommu_fault_event *evt,
@@ -434,6 +439,11 @@ extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain,
struct device *dev, void __user *udata);
extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
struct device *dev, ioasid_t pasid);
+extern int iommu_attach_pasid_table(struct iommu_domain *domain,
+ struct iommu_pasid_table_config *cfg);
+extern int iommu_uapi_attach_pasid_table(struct iommu_domain *domain,
+ void __user *udata);
+extern void iommu_detach_pasid_table(struct iommu_domain *domain);
extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
@@ -639,6 +649,7 @@ struct iommu_sva *iommu_sva_bind_device(struct device *dev,
void iommu_sva_unbind_device(struct iommu_sva *handle);
u32 iommu_sva_get_pasid(struct iommu_sva *handle);
+
#else /* CONFIG_IOMMU_API */
struct iommu_ops {};
@@ -1020,6 +1031,16 @@ iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
return -ENODEV;
}
+static inline
+int iommu_attach_pasid_table(struct iommu_domain *domain,
+ struct iommu_pasid_table_config *cfg)
+{
+ return -ENODEV;
+}
+
+static inline
+void iommu_detach_pasid_table(struct iommu_domain *domain) {}
+
static inline struct iommu_sva *
iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
{
@@ -338,4 +338,58 @@ struct iommu_gpasid_bind_data {
} vendor;
};
+/**
+ * struct iommu_pasid_smmuv3 - ARM SMMUv3 Stream Table Entry stage 1 related
+ * information
+ * @version: API version of this structure
+ * @s1fmt: STE s1fmt (format of the CD table: single CD, linear table
+ * or 2-level table)
+ * @s1dss: STE s1dss (specifies the behavior when @pasid_bits != 0
+ * and no PASID is passed along with the incoming transaction)
+ * @padding: reserved for future use (should be zero)
+ *
+ * The PASID table is referred to as the Context Descriptor (CD) table on ARM
+ * SMMUv3. Please refer to the ARM SMMU 3.x spec (ARM IHI 0070A) for full
+ * details.
+ */
+struct iommu_pasid_smmuv3 {
+#define PASID_TABLE_SMMUV3_CFG_VERSION_1 1
+ __u32 version;
+ __u8 s1fmt;
+ __u8 s1dss;
+ __u8 padding[2];
+};
+
+/**
+ * struct iommu_pasid_table_config - PASID table data used to bind guest PASID
+ * table to the host IOMMU
+ * @argsz: User filled size of this data
+ * @version: API version to prepare for future extensions
+ * @format: format of the PASID table
+ * @base_ptr: guest physical address of the PASID table
+ * @pasid_bits: number of PASID bits used in the PASID table
+ * @config: indicates whether the guest translation stage must
+ * be translated, bypassed or aborted.
+ * @padding: reserved for future use (should be zero)
+ * @vendor_data.smmuv3: table information when @format is
+ * %IOMMU_PASID_FORMAT_SMMUV3
+ */
+struct iommu_pasid_table_config {
+ __u32 argsz;
+#define PASID_TABLE_CFG_VERSION_1 1
+ __u32 version;
+#define IOMMU_PASID_FORMAT_SMMUV3 1
+ __u32 format;
+ __u64 base_ptr;
+ __u8 pasid_bits;
+#define IOMMU_PASID_CONFIG_TRANSLATE 1
+#define IOMMU_PASID_CONFIG_BYPASS 2
+#define IOMMU_PASID_CONFIG_ABORT 3
+ __u8 config;
+ __u8 padding[2];
+ union {
+ struct iommu_pasid_smmuv3 smmuv3;
+ } vendor_data;
+};
+
#endif /* _UAPI_IOMMU_H */