BACKPORT: tee: shm: add page accessor functions (7bc05256) · Commits · e / devices / android_kernel_fairphone_FP3

In order to register a shared buffer in TEE, we need accessor function that return list of pages for that buffer. Change-Id: I34630ae5d69813639ac8f0988631a65c16432846 Signed-off-by:

Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by:

Jens Wiklander <jens.wiklander@linaro.org> (cherry picked from commit e0c69ae8bfb500facebe1fa331f9400c216eaab0) Signed-off-by:

Victor Chong <victor.chong@linaro.org>

include/linux/tee_drv.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -403,6 +403,19 @@ static inline size_t tee_shm_get_size(struct tee_shm *shm)
		return shm->size;
		}

		/**
		* tee_shm_get_pages() - Get list of pages that hold shared buffer
		* @shm: Shared memory handle
		* @num_pages: Number of pages will be stored there
		* @returns pointer to pages array
		*/
		static inline struct page *tee_shm_get_pages(struct tee_shm shm,
		size_t *num_pages)
		{
		*num_pages = shm->num_pages;
		return shm->pages;
		}

		/**
		* tee_shm_get_page_offset() - Get shared buffer offset from page start
		* @shm: Shared memory handle