1 // SPDX-License-Identifier: GPL-2.0
53 		return -1;  in uv_init()
71 		goto fail;  in setup_uv()
76 		goto fail;  in setup_uv()
82 fail:  in setup_uv()
100 		return -EINVAL;  in uv_pin_shared()
123 		 * page. Let us emulate the newer variant (no-op).  in uv_destroy_page()
127 		return -EINVAL;  in uv_destroy_page()
143 		clear_bit(PG_arch_1, &page->flags);  in uv_destroy_owned_page()
163 		return -EINVAL;  in uv_convert_from_secure()
178 		clear_bit(PG_arch_1, &page->flags);  in uv_convert_owned_from_secure()
198 		if (folio->private)  in expected_folio_refs()
209 		return -EAGAIN;  in make_folio_secure()
212 		return -EBUSY;  in make_folio_secure()
213 	set_bit(PG_arch_1, &folio->flags);  in make_folio_secure()
215 	 * If the UVC does not succeed or fail immediately, we don't want to  in make_folio_secure()
220 	 * -EAGAIN and we let the callers deal with it.  in make_folio_secure()
225 	 * Return -ENXIO if the folio was not mapped, -EINVAL for other errors.  in make_folio_secure()
226 	 * If busy or partially completed, return -EAGAIN.  in make_folio_secure()
231 		return -EAGAIN;  in make_folio_secure()
232 	return uvcb->rc == 0x10a ? -ENXIO : -EINVAL;  in make_folio_secure()
236  * should_export_before_import - Determine whether an export is needed
237  * before an import-like operation
241  * Returns whether an export is needed before every import-like operation.
263 	if (uvcb->cmd == UVC_CMD_UNPIN_PAGE_SHARED)  in should_export_before_import()
265 	return atomic_read(&mm->context.protected_count) > 1;  in should_export_before_import()
285 	rc = -EFAULT;  in gmap_make_secure()
286 	mmap_read_lock(gmap->mm);  in gmap_make_secure()
291 	vma = vma_lookup(gmap->mm, uaddr);  in gmap_make_secure()
296 	 * In case userspace does it anyway this will result in an -EFAULT for  in gmap_make_secure()
304 	rc = -ENXIO;  in gmap_make_secure()
305 	ptep = get_locked_pte(gmap->mm, uaddr, &ptelock);  in gmap_make_secure()
310 		rc = -EINVAL;  in gmap_make_secure()
313 		rc = -EAGAIN;  in gmap_make_secure()
315 			if (should_export_before_import(uvcb, gmap->mm))  in gmap_make_secure()
325 		if (rc == -EAGAIN)  in gmap_make_secure()
331 	mmap_read_unlock(gmap->mm);  in gmap_make_secure()
333 	if (rc == -EAGAIN) {  in gmap_make_secure()
336 		 * completion, this is just a useless check, but it is safe.  in gmap_make_secure()
340 	} else if (rc == -EBUSY) {  in gmap_make_secure()
343 		 * still does not match our expected safe value, try with a  in gmap_make_secure()
350 			return -EAGAIN;  in gmap_make_secure()
354 		 * expected safe value. The main culprits are usually  in gmap_make_secure()
357 		 * reach the expected safe value.  in gmap_make_secure()
363 	} else if (rc == -ENXIO) {  in gmap_make_secure()
365 			return -EFAULT;  in gmap_make_secure()
366 		return -EAGAIN;  in gmap_make_secure()
377 		.guest_handle = gmap->guest_handle,  in gmap_convert_to_secure()
386  * gmap_destroy_page - Destroy a guest page.
391  * fails, an attempt is made to export the page. If both attempts fail, an
401 	rc = -EFAULT;  in gmap_destroy_page()
402 	mmap_read_lock(gmap->mm);  in gmap_destroy_page()
407 	vma = vma_lookup(gmap->mm, uaddr);  in gmap_destroy_page()
425 	 * re-enter secure mode and import it, while the second CPU was  in gmap_destroy_page()
435 	mmap_read_unlock(gmap->mm);  in gmap_destroy_page()
444  * no-op if the page is already exported.
461 	 * As secure pages are never huge, all 3 variants can co-exists.  in arch_make_page_accessible()
463 	if (!test_bit(PG_arch_1, &page->flags))  in arch_make_page_accessible()
468 		clear_bit(PG_arch_1, &page->flags);  in arch_make_page_accessible()
474 		clear_bit(PG_arch_1, &page->flags);  in arch_make_page_accessible()
697 	int rc = -ENOMEM;  in uv_info_init()
704 		return -ENOMEM;  in uv_info_init()
712 		rc = -ENOMEM;  in uv_info_init()
716 	rc = sysfs_create_group(&uv_query_kset->kobj, &uv_query_attr_group);  in uv_info_init()