tee: add start argument to shm_register callback

Adds a start argument to the shm_register callback to allow the callback
to check memory type of the passed pages.
Signed-off-by: NJens Wiklander <jens.wiklander@linaro.org>

drivers/tee/optee/call.c

@@ -536,7 +536,8 @@ void optee_free_pages_list(void *list, size_t num_entries)
 }
 
 int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
-		       struct page **pages, size_t num_pages)
+		       struct page **pages, size_t num_pages,
+		       unsigned long start)
 {
 	struct tee_shm *shm_arg = NULL;
 	struct optee_msg_arg *msg_arg;
@@ -606,7 +607,8 @@ int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm)
 }
 
 int optee_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm,
-			    struct page **pages, size_t num_pages)
+			    struct page **pages, size_t num_pages,
+			    unsigned long start)
 {
 	/*
 	 * We don't want to register supplicant memory in OP-TEE.

drivers/tee/optee/optee_private.h

@@ -173,11 +173,13 @@ void optee_enable_shm_cache(struct optee *optee);
 void optee_disable_shm_cache(struct optee *optee);
 
 int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm,
-		       struct page **pages, size_t num_pages);
+		       struct page **pages, size_t num_pages,
+		       unsigned long start);
 int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm);
 
 int optee_shm_register_supp(struct tee_context *ctx, struct tee_shm *shm,
-			    struct page **pages, size_t num_pages);
+			    struct page **pages, size_t num_pages,
+			    unsigned long start);
 int optee_shm_unregister_supp(struct tee_context *ctx, struct tee_shm *shm);
 
 int optee_from_msg_param(struct tee_param *params, size_t num_params,

drivers/tee/tee_shm.c

@@ -299,7 +299,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
 	}
 
 	rc = teedev->desc->ops->shm_register(ctx, shm, shm->pages,
-					     shm->num_pages);
+					     shm->num_pages, start);
 	if (rc) {
 		ret = ERR_PTR(rc);
 		goto err;

include/linux/tee_drv.h

@@ -108,7 +108,8 @@ struct tee_driver_ops {
 	int (*supp_send)(struct tee_context *ctx, u32 ret, u32 num_params,
 			 struct tee_param *param);
 	int (*shm_register)(struct tee_context *ctx, struct tee_shm *shm,
-			    struct page **pages, size_t num_pages);
+			    struct page **pages, size_t num_pages,
+			    unsigned long start);
 	int (*shm_unregister)(struct tee_context *ctx, struct tee_shm *shm);
 };