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.g...@linaro.org>
---
drivers/tee/optee/call.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index aa94270..bce45b1 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -553,6 +553,13 @@ 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);
--
2.7.4
