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 Reviewed-by: Jarkko Sakkinen jarkko.sakkinen@linux.intel.com Reviewed-by: Jens Wiklander jens.wiklander@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);