diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 20 | ||||
| -rw-r--r-- | drivers/iommu/iommufd/hw_pagetable.c | 7 |
2 files changed, 24 insertions, 3 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index aaa6fc8f2705..ed6c5cb60c5a 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2010,6 +2010,10 @@ static int __iommu_domain_alloc_dev(struct device *dev, void *data) return 0; } +/* + * The iommu ops in bus has been retired. Do not use this interface in + * new drivers. + */ struct iommu_domain *iommu_domain_alloc(const struct bus_type *bus) { const struct iommu_ops *ops = NULL; @@ -2026,6 +2030,22 @@ struct iommu_domain *iommu_domain_alloc(const struct bus_type *bus) } EXPORT_SYMBOL_GPL(iommu_domain_alloc); +/** + * iommu_paging_domain_alloc() - Allocate a paging domain + * @dev: device for which the domain is allocated + * + * Allocate a paging domain which will be managed by a kernel driver. Return + * allocated domain if successful, or a ERR pointer for failure. + */ +struct iommu_domain *iommu_paging_domain_alloc(struct device *dev) +{ + if (!dev_has_iommu(dev)) + return ERR_PTR(-ENODEV); + + return __iommu_domain_alloc(dev_iommu_ops(dev), dev, IOMMU_DOMAIN_UNMANAGED); +} +EXPORT_SYMBOL_GPL(iommu_paging_domain_alloc); + void iommu_domain_free(struct iommu_domain *domain) { if (domain->type == IOMMU_DOMAIN_SVA) diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index 6d5b2fffeea0..9020da52c10f 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -140,9 +140,10 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, } hwpt->domain->owner = ops; } else { - hwpt->domain = iommu_domain_alloc(idev->dev->bus); - if (!hwpt->domain) { - rc = -ENOMEM; + hwpt->domain = iommu_paging_domain_alloc(idev->dev); + if (IS_ERR(hwpt->domain)) { + rc = PTR_ERR(hwpt->domain); + hwpt->domain = NULL; goto out_abort; } } |