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authorCedric Neveux <cedric.neveux@nxp.com>2019-03-04 10:54:23 +0300
committerJens Wiklander <jens.wiklander@linaro.org>2020-08-21 09:55:13 +0300
commitba171d3f0850003216fd1a85190d17b1feddb961 (patch)
tree32c534e8e4d18d1e2a9350b7333f53325137c209 /include/linux/tee_drv.h
parent9123e3a74ec7b934a4a099e98af6a61c2f80bbf5 (diff)
downloadlinux-ba171d3f0850003216fd1a85190d17b1feddb961.tar.xz
driver: tee: Handle NULL pointer indication from client
TEE Client introduce a new capability "TEE_GEN_CAP_MEMREF_NULL" to handle the support of the shared memory buffer with a NULL pointer. This capability depends on TEE Capabilities and driver support. Driver and TEE exchange capabilities at driver initialization. Signed-off-by: Michael Whitfield <michael.whitfield@nxp.com> Signed-off-by: Cedric Neveux <cedric.neveux@nxp.com> Reviewed-by: Joakim Bech <joakim.bech@linaro.org> Tested-by: Joakim Bech <joakim.bech@linaro.org> (QEMU) Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'include/linux/tee_drv.h')
-rw-r--r--include/linux/tee_drv.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
index d074302989dd..cdd049a724b1 100644
--- a/include/linux/tee_drv.h
+++ b/include/linux/tee_drv.h
@@ -47,6 +47,8 @@ struct tee_shm_pool;
* and just return with an error code. It is needed for requests
* that arises from TEE based kernel drivers that should be
* non-blocking in nature.
+ * @cap_memref_null: flag indicating if the TEE Client support shared
+ * memory buffer with a NULL pointer.
*/
struct tee_context {
struct tee_device *teedev;
@@ -54,6 +56,7 @@ struct tee_context {
struct kref refcount;
bool releasing;
bool supp_nowait;
+ bool cap_memref_null;
};
struct tee_param_memref {