This makes IOMMUFD to use iommu_domain_alloc_user() for iommu_domain creation as IOMMUFD needs to support iommu_domain allocation with parameters from userspace in nested support. If the iommu driver doesn't provide domain_alloc_user callback then IOMMUFD falls back to use iommu_domain_alloc().
Suggested-by: Jason Gunthorpe jgg@nvidia.com Reviewed-by: Lu Baolu baolu.lu@linux.intel.com Reviewed-by: Kevin Tian kevin.tian@intel.com Co-developed-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Yi Liu yi.l.liu@intel.com --- drivers/iommu/iommufd/hw_pagetable.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index cf2c1504e20d..48874f896521 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -5,6 +5,7 @@ #include <linux/iommu.h> #include <uapi/linux/iommufd.h>
+#include "../iommu-priv.h" #include "iommufd_private.h"
void iommufd_hw_pagetable_destroy(struct iommufd_object *obj) @@ -74,6 +75,7 @@ struct iommufd_hw_pagetable * iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, struct iommufd_device *idev, bool immediate_attach) { + const struct iommu_ops *ops = dev_iommu_ops(idev->dev); struct iommufd_hw_pagetable *hwpt; int rc;
@@ -88,10 +90,19 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, refcount_inc(&ioas->obj.users); hwpt->ioas = ioas;
- hwpt->domain = iommu_domain_alloc(idev->dev->bus); - if (!hwpt->domain) { - rc = -ENOMEM; - goto out_abort; + if (ops->domain_alloc_user) { + hwpt->domain = ops->domain_alloc_user(idev->dev, 0); + if (IS_ERR(hwpt->domain)) { + rc = PTR_ERR(hwpt->domain); + hwpt->domain = NULL; + goto out_abort; + } + } else { + hwpt->domain = iommu_domain_alloc(idev->dev->bus); + if (!hwpt->domain) { + rc = -ENOMEM; + goto out_abort; + } }
/*