These are entirely unused now, and were only called by the previously entirely unused vfio mdev iommu interaction.
Signed-off-by: Christoph Hellwig <[email protected]> --- drivers/iommu/intel/iommu.c | 205 ------------------------------------ drivers/iommu/iommu.c | 33 ------ include/linux/intel-iommu.h | 10 -- include/linux/iommu.h | 17 --- 4 files changed, 265 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index cc07f316adcb18..6cae6e4d693226 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -1497,18 +1497,6 @@ static void domain_update_iotlb(struct dmar_domain *domain) break; } - if (!has_iotlb_device) { - struct subdev_domain_info *sinfo; - - list_for_each_entry(sinfo, &domain->subdevices, link_domain) { - info = get_domain_info(sinfo->pdev); - if (info && info->ats_enabled) { - has_iotlb_device = true; - break; - } - } - } - domain->has_iotlb_device = has_iotlb_device; } @@ -1606,7 +1594,6 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain, { unsigned long flags; struct device_domain_info *info; - struct subdev_domain_info *sinfo; if (!domain->has_iotlb_device) return; @@ -1614,11 +1601,6 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain, spin_lock_irqsave(&device_domain_lock, flags); list_for_each_entry(info, &domain->devices, link) __iommu_flush_dev_iotlb(info, addr, mask); - - list_for_each_entry(sinfo, &domain->subdevices, link_domain) { - info = get_domain_info(sinfo->pdev); - __iommu_flush_dev_iotlb(info, addr, mask); - } spin_unlock_irqrestore(&device_domain_lock, flags); } @@ -1903,7 +1885,6 @@ static struct dmar_domain *alloc_domain(int flags) domain->flags |= DOMAIN_FLAG_USE_FIRST_LEVEL; domain->has_iotlb_device = false; INIT_LIST_HEAD(&domain->devices); - INIT_LIST_HEAD(&domain->subdevices); return domain; } @@ -2593,7 +2574,6 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu, info->iommu = iommu; info->pasid_table = NULL; info->auxd_enabled = 0; - INIT_LIST_HEAD(&info->subdevices); if (dev && dev_is_pci(dev)) { struct pci_dev *pdev = to_pci_dev(info->dev); @@ -4579,168 +4559,6 @@ is_aux_domain(struct device *dev, struct iommu_domain *domain) domain->type == IOMMU_DOMAIN_UNMANAGED; } -static inline struct subdev_domain_info * -lookup_subdev_info(struct dmar_domain *domain, struct device *dev) -{ - struct subdev_domain_info *sinfo; - - if (!list_empty(&domain->subdevices)) { - list_for_each_entry(sinfo, &domain->subdevices, link_domain) { - if (sinfo->pdev == dev) - return sinfo; - } - } - - return NULL; -} - -static int auxiliary_link_device(struct dmar_domain *domain, - struct device *dev) -{ - struct device_domain_info *info = get_domain_info(dev); - struct subdev_domain_info *sinfo = lookup_subdev_info(domain, dev); - - assert_spin_locked(&device_domain_lock); - if (WARN_ON(!info)) - return -EINVAL; - - if (!sinfo) { - sinfo = kzalloc(sizeof(*sinfo), GFP_ATOMIC); - sinfo->domain = domain; - sinfo->pdev = dev; - list_add(&sinfo->link_phys, &info->subdevices); - list_add(&sinfo->link_domain, &domain->subdevices); - } - - return ++sinfo->users; -} - -static int auxiliary_unlink_device(struct dmar_domain *domain, - struct device *dev) -{ - struct device_domain_info *info = get_domain_info(dev); - struct subdev_domain_info *sinfo = lookup_subdev_info(domain, dev); - int ret; - - assert_spin_locked(&device_domain_lock); - if (WARN_ON(!info || !sinfo || sinfo->users <= 0)) - return -EINVAL; - - ret = --sinfo->users; - if (!ret) { - list_del(&sinfo->link_phys); - list_del(&sinfo->link_domain); - kfree(sinfo); - } - - return ret; -} - -static int aux_domain_add_dev(struct dmar_domain *domain, - struct device *dev) -{ - int ret; - unsigned long flags; - struct intel_iommu *iommu; - - iommu = device_to_iommu(dev, NULL, NULL); - if (!iommu) - return -ENODEV; - - if (domain->default_pasid <= 0) { - u32 pasid; - - /* No private data needed for the default pasid */ - pasid = ioasid_alloc(NULL, PASID_MIN, - pci_max_pasids(to_pci_dev(dev)) - 1, - NULL); - if (pasid == INVALID_IOASID) { - pr_err("Can't allocate default pasid\n"); - return -ENODEV; - } - domain->default_pasid = pasid; - } - - spin_lock_irqsave(&device_domain_lock, flags); - ret = auxiliary_link_device(domain, dev); - if (ret <= 0) - goto link_failed; - - /* - * Subdevices from the same physical device can be attached to the - * same domain. For such cases, only the first subdevice attachment - * needs to go through the full steps in this function. So if ret > - * 1, just goto out. - */ - if (ret > 1) - goto out; - - /* - * iommu->lock must be held to attach domain to iommu and setup the - * pasid entry for second level translation. - */ - spin_lock(&iommu->lock); - ret = domain_attach_iommu(domain, iommu); - if (ret) - goto attach_failed; - - /* Setup the PASID entry for mediated devices: */ - if (domain_use_first_level(domain)) - ret = domain_setup_first_level(iommu, domain, dev, - domain->default_pasid); - else - ret = intel_pasid_setup_second_level(iommu, domain, dev, - domain->default_pasid); - if (ret) - goto table_failed; - - spin_unlock(&iommu->lock); -out: - spin_unlock_irqrestore(&device_domain_lock, flags); - - return 0; - -table_failed: - domain_detach_iommu(domain, iommu); -attach_failed: - spin_unlock(&iommu->lock); - auxiliary_unlink_device(domain, dev); -link_failed: - spin_unlock_irqrestore(&device_domain_lock, flags); - if (list_empty(&domain->subdevices) && domain->default_pasid > 0) - ioasid_put(domain->default_pasid); - - return ret; -} - -static void aux_domain_remove_dev(struct dmar_domain *domain, - struct device *dev) -{ - struct device_domain_info *info; - struct intel_iommu *iommu; - unsigned long flags; - - if (!is_aux_domain(dev, &domain->domain)) - return; - - spin_lock_irqsave(&device_domain_lock, flags); - info = get_domain_info(dev); - iommu = info->iommu; - - if (!auxiliary_unlink_device(domain, dev)) { - spin_lock(&iommu->lock); - intel_pasid_tear_down_entry(iommu, dev, - domain->default_pasid, false); - domain_detach_iommu(domain, iommu); - spin_unlock(&iommu->lock); - } - - spin_unlock_irqrestore(&device_domain_lock, flags); - - if (list_empty(&domain->subdevices) && domain->default_pasid > 0) - ioasid_put(domain->default_pasid); -} - static int prepare_domain_attach_device(struct iommu_domain *domain, struct device *dev) { @@ -4813,33 +4631,12 @@ static int intel_iommu_attach_device(struct iommu_domain *domain, return domain_add_dev_info(to_dmar_domain(domain), dev); } -static int intel_iommu_aux_attach_device(struct iommu_domain *domain, - struct device *dev) -{ - int ret; - - if (!is_aux_domain(dev, domain)) - return -EPERM; - - ret = prepare_domain_attach_device(domain, dev); - if (ret) - return ret; - - return aux_domain_add_dev(to_dmar_domain(domain), dev); -} - static void intel_iommu_detach_device(struct iommu_domain *domain, struct device *dev) { dmar_remove_one_dev_info(dev); } -static void intel_iommu_aux_detach_device(struct iommu_domain *domain, - struct device *dev) -{ - aux_domain_remove_dev(to_dmar_domain(domain), dev); -} - #ifdef CONFIG_INTEL_IOMMU_SVM /* * 2D array for converting and sanitizing IOMMU generic TLB granularity to @@ -5474,8 +5271,6 @@ const struct iommu_ops intel_iommu_ops = { .enable_nesting = intel_iommu_enable_nesting, .attach_dev = intel_iommu_attach_device, .detach_dev = intel_iommu_detach_device, - .aux_attach_dev = intel_iommu_aux_attach_device, - .aux_detach_dev = intel_iommu_aux_detach_device, .map = intel_iommu_map, .iotlb_sync_map = intel_iommu_iotlb_sync_map, .unmap = intel_iommu_unmap, diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 6721ac17baf29b..c4b92270946c2f 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2901,39 +2901,6 @@ bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat) } 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); - /** * iommu_sva_bind_device() - Bind a process address space to a device * @dev: the device diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 03faf20a6817e8..c12b8e6545733c 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -548,7 +548,6 @@ struct dmar_domain { bool has_iotlb_device; struct list_head devices; /* all devices' list */ - struct list_head subdevices; /* all subdevices' list */ struct iova_domain iovad; /* iova's that belong to this domain */ struct dma_pte *pgd; /* virtual address */ @@ -621,15 +620,6 @@ struct intel_iommu { struct dmar_drhd_unit *drhd; }; -/* Per subdevice private data */ -struct subdev_domain_info { - struct list_head link_phys; /* link to phys device siblings */ - struct list_head link_domain; /* link to domain siblings */ - struct device *pdev; /* physical device derived from */ - struct dmar_domain *domain; /* aux-domain */ - int users; /* user count */ -}; - /* PCI domain-device relationship */ struct device_domain_info { struct list_head link; /* link to domain siblings */ diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d8aa5c8a5ba57a..b0bf99dfd80d16 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -258,10 +258,6 @@ struct iommu_ops { 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); - struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm, void *drvdata); void (*sva_unbind)(struct iommu_sva *handle); @@ -590,8 +586,6 @@ void iommu_release_device(struct device *dev); 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); struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, @@ -931,17 +925,6 @@ 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 struct iommu_sva * iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { -- 2.30.2 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
