Loading drivers/iommu/iommu.c +200 −0 Original line number Diff line number Diff line Loading @@ -2039,3 +2039,203 @@ int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids) return 0; } EXPORT_SYMBOL_GPL(iommu_fwspec_add_ids); /* * Per device IOMMU features. */ bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_has_feat) return ops->dev_has_feat(dev, feat); return false; } EXPORT_SYMBOL_GPL(iommu_dev_has_feature); int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_enable_feat) return ops->dev_enable_feat(dev, feat); return -ENODEV; } EXPORT_SYMBOL_GPL(iommu_dev_enable_feature); /* * The device drivers should do the necessary cleanups before calling this. * For example, before disabling the aux-domain feature, the device driver * should detach all aux-domains. Otherwise, this will return -EBUSY. */ int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_disable_feat) return ops->dev_disable_feat(dev, feat); return -EBUSY; } EXPORT_SYMBOL_GPL(iommu_dev_disable_feature); bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_feat_enabled) return ops->dev_feat_enabled(dev, feat); return false; } EXPORT_SYMBOL_GPL(iommu_dev_feature_enabled); /* * Aux-domain specific attach/detach. * * Only works if iommu_dev_feature_enabled(dev, IOMMU_DEV_FEAT_AUX) returns * true. Also, as long as domains are attached to a device through this * interface, any tries to call iommu_attach_device() should fail * (iommu_detach_device() can't fail, so we fail when trying to re-attach). * This should make us safe against a device being attached to a guest as a * whole while there are still pasid users on it (aux and sva). */ int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev) { int ret = -ENODEV; if (domain->ops->aux_attach_dev) ret = domain->ops->aux_attach_dev(domain, dev); if (!ret) trace_attach_device_to_domain(dev); return ret; } EXPORT_SYMBOL_GPL(iommu_aux_attach_device); void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev) { if (domain->ops->aux_detach_dev) { domain->ops->aux_detach_dev(domain, dev); trace_detach_device_from_domain(dev); } } EXPORT_SYMBOL_GPL(iommu_aux_detach_device); int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev) { int ret = -ENODEV; if (domain->ops->aux_get_pasid) ret = domain->ops->aux_get_pasid(domain, dev); return ret; } EXPORT_SYMBOL_GPL(iommu_aux_get_pasid); /** * iommu_sva_bind_device() - Bind a process address space to a device * @dev: the device * @mm: the mm to bind, caller must hold a reference to it * * Create a bond between device and address space, allowing the device to access * the mm using the returned PASID. If a bond already exists between @device and * @mm, it is returned and an additional reference is taken. Caller must call * iommu_sva_unbind_device() to release each reference. * * iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) must be called first, to * initialize the required SVA features. * * On error, returns an ERR_PTR value. */ struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { struct iommu_group *group; struct iommu_sva *handle = ERR_PTR(-EINVAL); const struct iommu_ops *ops = dev->bus->iommu_ops; if (!ops || !ops->sva_bind) return ERR_PTR(-ENODEV); group = iommu_group_get(dev); if (!group) return ERR_PTR(-ENODEV); /* Ensure device count and domain don't change while we're binding */ mutex_lock(&group->mutex); /* * To keep things simple, SVA currently doesn't support IOMMU groups * with more than one device. Existing SVA-capable systems are not * affected by the problems that required IOMMU groups (lack of ACS * isolation, device ID aliasing and other hardware issues). */ if (iommu_group_device_count(group) != 1) goto out_unlock; handle = ops->sva_bind(dev, mm, drvdata); out_unlock: mutex_unlock(&group->mutex); iommu_group_put(group); return handle; } EXPORT_SYMBOL_GPL(iommu_sva_bind_device); /** * iommu_sva_unbind_device() - Remove a bond created with iommu_sva_bind_device * @handle: the handle returned by iommu_sva_bind_device() * * Put reference to a bond between device and address space. The device should * not be issuing any more transaction for this PASID. All outstanding page * requests for this PASID must have been flushed to the IOMMU. * * Returns 0 on success, or an error value */ void iommu_sva_unbind_device(struct iommu_sva *handle) { struct iommu_group *group; struct device *dev = handle->dev; const struct iommu_ops *ops = dev->bus->iommu_ops; if (!ops || !ops->sva_unbind) return; group = iommu_group_get(dev); if (!group) return; mutex_lock(&group->mutex); ops->sva_unbind(handle); mutex_unlock(&group->mutex); iommu_group_put(group); } EXPORT_SYMBOL_GPL(iommu_sva_unbind_device); int iommu_sva_set_ops(struct iommu_sva *handle, const struct iommu_sva_ops *sva_ops) { if (handle->ops && handle->ops != sva_ops) return -EEXIST; handle->ops = sva_ops; return 0; } EXPORT_SYMBOL_GPL(iommu_sva_set_ops); int iommu_sva_get_pasid(struct iommu_sva *handle) { const struct iommu_ops *ops = handle->dev->bus->iommu_ops; if (!ops || !ops->sva_get_pasid) return IOMMU_PASID_INVALID; return ops->sva_get_pasid(handle); } EXPORT_SYMBOL_GPL(iommu_sva_get_pasid); include/linux/iommu.h +140 −0 Original line number Diff line number Diff line Loading @@ -48,6 +48,7 @@ struct bus_type; struct device; struct iommu_domain; struct notifier_block; struct iommu_sva; /* iommu fault flags */ #define IOMMU_FAULT_READ 0x0 Loading @@ -55,6 +56,8 @@ struct notifier_block; typedef int (*iommu_fault_handler_t)(struct iommu_domain *, struct device *, unsigned long, int, void *); typedef int (*iommu_mm_exit_handler_t)(struct device *dev, struct iommu_sva *, void *); struct iommu_domain_geometry { dma_addr_t aperture_start; /* First address that can be mapped */ Loading Loading @@ -156,6 +159,33 @@ struct iommu_resv_region { enum iommu_resv_type type; }; /* Per device IOMMU features */ enum iommu_dev_features { IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */ IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */ }; #define IOMMU_PASID_INVALID (-1U) /** * struct iommu_sva_ops - device driver callbacks for an SVA context * * @mm_exit: called when the mm is about to be torn down by exit_mmap. After * @mm_exit returns, the device must not issue any more transaction * with the PASID given as argument. * * The @mm_exit handler is allowed to sleep. Be careful about the * locks taken in @mm_exit, because they might lead to deadlocks if * they are also held when dropping references to the mm. Consider the * following call chain: * mutex_lock(A); mmput(mm) -> exit_mm() -> @mm_exit() -> mutex_lock(A) * Using mmput_async() prevents this scenario. * */ struct iommu_sva_ops { iommu_mm_exit_handler_t mm_exit; }; #ifdef CONFIG_IOMMU_API /** Loading Loading @@ -186,6 +216,14 @@ struct iommu_resv_region { * @of_xlate: add OF master IDs to iommu grouping * @is_attach_deferred: Check if domain attach should be deferred from iommu * driver init to device driver init (default no) * @dev_has/enable/disable_feat: per device entries to check/enable/disable * iommu specific features. * @dev_feat_enabled: check enabled feature * @aux_attach/detach_dev: aux-domain specific attach/detach entries. * @aux_get_pasid: get the pasid given an aux-domain * @sva_bind: Bind process address space to device * @sva_unbind: Unbind process address space from device * @sva_get_pasid: Get PASID associated to a SVA handle * @pgsize_bitmap: bitmap of all possible supported page sizes */ struct iommu_ops { Loading Loading @@ -230,6 +268,22 @@ struct iommu_ops { int (*of_xlate)(struct device *dev, struct of_phandle_args *args); bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev); /* Per device IOMMU features */ bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f); bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f); int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f); int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f); /* Aux-domain specific attach/detach entries */ int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev); void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev); int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev); struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm, void *drvdata); void (*sva_unbind)(struct iommu_sva *handle); int (*sva_get_pasid)(struct iommu_sva *handle); unsigned long pgsize_bitmap; }; Loading Loading @@ -400,6 +454,14 @@ struct iommu_fwspec { /* ATS is supported */ #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0) /** * struct iommu_sva - handle to a device-mm bond */ struct iommu_sva { struct device *dev; const struct iommu_sva_ops *ops; }; int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, const struct iommu_ops *ops); void iommu_fwspec_free(struct device *dev); Loading @@ -420,6 +482,22 @@ static inline void dev_iommu_fwspec_set(struct device *dev, int iommu_probe_device(struct device *dev); void iommu_release_device(struct device *dev); bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f); int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f); int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f); bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f); int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev); void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev); int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev); struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata); void iommu_sva_unbind_device(struct iommu_sva *handle); int iommu_sva_set_ops(struct iommu_sva *handle, const struct iommu_sva_ops *ops); int iommu_sva_get_pasid(struct iommu_sva *handle); #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; Loading Loading @@ -704,6 +782,68 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) return NULL; } static inline bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat) { return false; } static inline bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat) { return false; } static inline int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat) { return -ENODEV; } static inline int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat) { return -ENODEV; } static inline int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev) { return -ENODEV; } static inline void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev) { } static inline int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev) { return -ENODEV; } static inline struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { return NULL; } static inline void iommu_sva_unbind_device(struct iommu_sva *handle) { } static inline int iommu_sva_set_ops(struct iommu_sva *handle, const struct iommu_sva_ops *ops) { return -EINVAL; } static inline int iommu_sva_get_pasid(struct iommu_sva *handle) { return IOMMU_PASID_INVALID; } #endif /* CONFIG_IOMMU_API */ #ifdef CONFIG_IOMMU_DEBUGFS Loading Loading
drivers/iommu/iommu.c +200 −0 Original line number Diff line number Diff line Loading @@ -2039,3 +2039,203 @@ int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids) return 0; } EXPORT_SYMBOL_GPL(iommu_fwspec_add_ids); /* * Per device IOMMU features. */ bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_has_feat) return ops->dev_has_feat(dev, feat); return false; } EXPORT_SYMBOL_GPL(iommu_dev_has_feature); int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_enable_feat) return ops->dev_enable_feat(dev, feat); return -ENODEV; } EXPORT_SYMBOL_GPL(iommu_dev_enable_feature); /* * The device drivers should do the necessary cleanups before calling this. * For example, before disabling the aux-domain feature, the device driver * should detach all aux-domains. Otherwise, this will return -EBUSY. */ int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_disable_feat) return ops->dev_disable_feat(dev, feat); return -EBUSY; } EXPORT_SYMBOL_GPL(iommu_dev_disable_feature); bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat) { const struct iommu_ops *ops = dev->bus->iommu_ops; if (ops && ops->dev_feat_enabled) return ops->dev_feat_enabled(dev, feat); return false; } EXPORT_SYMBOL_GPL(iommu_dev_feature_enabled); /* * Aux-domain specific attach/detach. * * Only works if iommu_dev_feature_enabled(dev, IOMMU_DEV_FEAT_AUX) returns * true. Also, as long as domains are attached to a device through this * interface, any tries to call iommu_attach_device() should fail * (iommu_detach_device() can't fail, so we fail when trying to re-attach). * This should make us safe against a device being attached to a guest as a * whole while there are still pasid users on it (aux and sva). */ int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev) { int ret = -ENODEV; if (domain->ops->aux_attach_dev) ret = domain->ops->aux_attach_dev(domain, dev); if (!ret) trace_attach_device_to_domain(dev); return ret; } EXPORT_SYMBOL_GPL(iommu_aux_attach_device); void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev) { if (domain->ops->aux_detach_dev) { domain->ops->aux_detach_dev(domain, dev); trace_detach_device_from_domain(dev); } } EXPORT_SYMBOL_GPL(iommu_aux_detach_device); int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev) { int ret = -ENODEV; if (domain->ops->aux_get_pasid) ret = domain->ops->aux_get_pasid(domain, dev); return ret; } EXPORT_SYMBOL_GPL(iommu_aux_get_pasid); /** * iommu_sva_bind_device() - Bind a process address space to a device * @dev: the device * @mm: the mm to bind, caller must hold a reference to it * * Create a bond between device and address space, allowing the device to access * the mm using the returned PASID. If a bond already exists between @device and * @mm, it is returned and an additional reference is taken. Caller must call * iommu_sva_unbind_device() to release each reference. * * iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) must be called first, to * initialize the required SVA features. * * On error, returns an ERR_PTR value. */ struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { struct iommu_group *group; struct iommu_sva *handle = ERR_PTR(-EINVAL); const struct iommu_ops *ops = dev->bus->iommu_ops; if (!ops || !ops->sva_bind) return ERR_PTR(-ENODEV); group = iommu_group_get(dev); if (!group) return ERR_PTR(-ENODEV); /* Ensure device count and domain don't change while we're binding */ mutex_lock(&group->mutex); /* * To keep things simple, SVA currently doesn't support IOMMU groups * with more than one device. Existing SVA-capable systems are not * affected by the problems that required IOMMU groups (lack of ACS * isolation, device ID aliasing and other hardware issues). */ if (iommu_group_device_count(group) != 1) goto out_unlock; handle = ops->sva_bind(dev, mm, drvdata); out_unlock: mutex_unlock(&group->mutex); iommu_group_put(group); return handle; } EXPORT_SYMBOL_GPL(iommu_sva_bind_device); /** * iommu_sva_unbind_device() - Remove a bond created with iommu_sva_bind_device * @handle: the handle returned by iommu_sva_bind_device() * * Put reference to a bond between device and address space. The device should * not be issuing any more transaction for this PASID. All outstanding page * requests for this PASID must have been flushed to the IOMMU. * * Returns 0 on success, or an error value */ void iommu_sva_unbind_device(struct iommu_sva *handle) { struct iommu_group *group; struct device *dev = handle->dev; const struct iommu_ops *ops = dev->bus->iommu_ops; if (!ops || !ops->sva_unbind) return; group = iommu_group_get(dev); if (!group) return; mutex_lock(&group->mutex); ops->sva_unbind(handle); mutex_unlock(&group->mutex); iommu_group_put(group); } EXPORT_SYMBOL_GPL(iommu_sva_unbind_device); int iommu_sva_set_ops(struct iommu_sva *handle, const struct iommu_sva_ops *sva_ops) { if (handle->ops && handle->ops != sva_ops) return -EEXIST; handle->ops = sva_ops; return 0; } EXPORT_SYMBOL_GPL(iommu_sva_set_ops); int iommu_sva_get_pasid(struct iommu_sva *handle) { const struct iommu_ops *ops = handle->dev->bus->iommu_ops; if (!ops || !ops->sva_get_pasid) return IOMMU_PASID_INVALID; return ops->sva_get_pasid(handle); } EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);
include/linux/iommu.h +140 −0 Original line number Diff line number Diff line Loading @@ -48,6 +48,7 @@ struct bus_type; struct device; struct iommu_domain; struct notifier_block; struct iommu_sva; /* iommu fault flags */ #define IOMMU_FAULT_READ 0x0 Loading @@ -55,6 +56,8 @@ struct notifier_block; typedef int (*iommu_fault_handler_t)(struct iommu_domain *, struct device *, unsigned long, int, void *); typedef int (*iommu_mm_exit_handler_t)(struct device *dev, struct iommu_sva *, void *); struct iommu_domain_geometry { dma_addr_t aperture_start; /* First address that can be mapped */ Loading Loading @@ -156,6 +159,33 @@ struct iommu_resv_region { enum iommu_resv_type type; }; /* Per device IOMMU features */ enum iommu_dev_features { IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */ IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */ }; #define IOMMU_PASID_INVALID (-1U) /** * struct iommu_sva_ops - device driver callbacks for an SVA context * * @mm_exit: called when the mm is about to be torn down by exit_mmap. After * @mm_exit returns, the device must not issue any more transaction * with the PASID given as argument. * * The @mm_exit handler is allowed to sleep. Be careful about the * locks taken in @mm_exit, because they might lead to deadlocks if * they are also held when dropping references to the mm. Consider the * following call chain: * mutex_lock(A); mmput(mm) -> exit_mm() -> @mm_exit() -> mutex_lock(A) * Using mmput_async() prevents this scenario. * */ struct iommu_sva_ops { iommu_mm_exit_handler_t mm_exit; }; #ifdef CONFIG_IOMMU_API /** Loading Loading @@ -186,6 +216,14 @@ struct iommu_resv_region { * @of_xlate: add OF master IDs to iommu grouping * @is_attach_deferred: Check if domain attach should be deferred from iommu * driver init to device driver init (default no) * @dev_has/enable/disable_feat: per device entries to check/enable/disable * iommu specific features. * @dev_feat_enabled: check enabled feature * @aux_attach/detach_dev: aux-domain specific attach/detach entries. * @aux_get_pasid: get the pasid given an aux-domain * @sva_bind: Bind process address space to device * @sva_unbind: Unbind process address space from device * @sva_get_pasid: Get PASID associated to a SVA handle * @pgsize_bitmap: bitmap of all possible supported page sizes */ struct iommu_ops { Loading Loading @@ -230,6 +268,22 @@ struct iommu_ops { int (*of_xlate)(struct device *dev, struct of_phandle_args *args); bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev); /* Per device IOMMU features */ bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f); bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f); int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f); int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f); /* Aux-domain specific attach/detach entries */ int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev); void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev); int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev); struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm, void *drvdata); void (*sva_unbind)(struct iommu_sva *handle); int (*sva_get_pasid)(struct iommu_sva *handle); unsigned long pgsize_bitmap; }; Loading Loading @@ -400,6 +454,14 @@ struct iommu_fwspec { /* ATS is supported */ #define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0) /** * struct iommu_sva - handle to a device-mm bond */ struct iommu_sva { struct device *dev; const struct iommu_sva_ops *ops; }; int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, const struct iommu_ops *ops); void iommu_fwspec_free(struct device *dev); Loading @@ -420,6 +482,22 @@ static inline void dev_iommu_fwspec_set(struct device *dev, int iommu_probe_device(struct device *dev); void iommu_release_device(struct device *dev); bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f); int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f); int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f); bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f); int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev); void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev); int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev); struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata); void iommu_sva_unbind_device(struct iommu_sva *handle); int iommu_sva_set_ops(struct iommu_sva *handle, const struct iommu_sva_ops *ops); int iommu_sva_get_pasid(struct iommu_sva *handle); #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; Loading Loading @@ -704,6 +782,68 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) return NULL; } static inline bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat) { return false; } static inline bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat) { return false; } static inline int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat) { return -ENODEV; } static inline int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat) { return -ENODEV; } static inline int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev) { return -ENODEV; } static inline void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev) { } static inline int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev) { return -ENODEV; } static inline struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { return NULL; } static inline void iommu_sva_unbind_device(struct iommu_sva *handle) { } static inline int iommu_sva_set_ops(struct iommu_sva *handle, const struct iommu_sva_ops *ops) { return -EINVAL; } static inline int iommu_sva_get_pasid(struct iommu_sva *handle) { return IOMMU_PASID_INVALID; } #endif /* CONFIG_IOMMU_API */ #ifdef CONFIG_IOMMU_DEBUGFS Loading
