diff mbox series

[1/7] tee: optee: allow kernel pages to register as shm

Message ID 1560168515-32714-2-git-send-email-sumit.garg@linaro.org
State New
Headers show
Series Introduce TEE based Trusted Keys support | expand

Commit Message

Sumit Garg June 10, 2019, 12:08 p.m. UTC 
Kernel pages are marked as normal type memory only so allow kernel pages
to be registered as shared memory with OP-TEE.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>

---
 drivers/tee/optee/call.c | 7 +++++++
 1 file changed, 7 insertions(+)

-- 
2.7.4
diff mbox series

Patch

diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index 0d8605d..ab24e2a 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -567,6 +567,13 @@  static int check_mem_type(unsigned long start, size_t num_pages)
 	struct mm_struct *mm = current->mm;
 	int rc;
 
+	/*
+	 * Allow kernel address to register with OP-TEE as kernel
+	 * pages are configured as normal memory only.
+	 */
+	if (virt_addr_valid(start))
+		return 0;
+
 	down_read(&mm->mmap_sem);
 	rc = __check_mem_type(find_vma(mm, start),
 			      start + num_pages * PAGE_SIZE);