Re: [PATCH 12/14] iommufd: Add IOMMU_HWPT_ALLOC

On Fri, Feb 24, 2023 at 08:27:57PM -0400, Jason Gunthorpe wrote:

+int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) +{

• struct iommu_hwpt_alloc *cmd = ucmd->cmd;
• struct iommufd_hw_pagetable *hwpt;
• struct iommufd_device *idev;
• struct iommufd_ioas *ioas;
• int rc;
• if (cmd->flags)

• return -EOPNOTSUPP;
  

• idev = iommufd_get_device(ucmd, cmd->dev_id);
• if (IS_ERR(idev))

• return PTR_ERR(idev);
  

• ioas = iommufd_get_ioas(ucmd, cmd->pt_id);
• if (IS_ERR(ioas)) {

• rc = PTR_ERR(idev);
  

PTR_ERR(ioas)

• goto out_put_idev;
  

• }
• mutex_lock(&ioas->mutex);
• hwpt = iommufd_hw_pagetable_alloc(ucmd->ictx, ioas, idev, false);
• mutex_unlock(&ioas->mutex);
• if (IS_ERR(hwpt)) {

• rc = PTR_ERR(idev);
  

PTR_ERR(hwpt)

Thanks Nic