On Thu, Nov 20, 2025 at 07:55:04AM +0000, Tian, Kevin wrote: > > From: Jason Gunthorpe <[email protected]> > > Sent: Saturday, November 8, 2025 12:50 AM > > > > > > @@ -2031,7 +2155,10 @@ int iopt_pages_rw_access(struct iopt_pages > > *pages, unsigned long start_byte, > > if ((flags & IOMMUFD_ACCESS_RW_WRITE) && !pages->writable) > > return -EPERM; > > > > - if (pages->type == IOPT_ADDRESS_FILE) > > + if (iopt_is_dmabuf(pages)) > > + return -EINVAL; > > + > > probably also add helpers for other types, e.g.: > > iopt_is_user() > iopt_is_memfd()
The helper was to integrate the IS_ENABLED() check for DMABUF, there are not so many others uses, I think leave it to not bloat the patch. > > + if (pages->type != IOPT_ADDRESS_USER) > > return iopt_pages_rw_slow(pages, start_index, last_index, > > start_byte % PAGE_SIZE, data, > > length, > > flags); > > -- > > then the following WARN_ON() becomes useless: > > if (IS_ENABLED(CONFIG_IOMMUFD_TEST) && > WARN_ON(pages->type != IOPT_ADDRESS_USER)) > return -EINVAL; Yep Thanks, Jason
