After TEE has completed processing of TEE_CMD_ID_LOAD_TA, set proper
value in 'return_origin' argument passed by open_session() call. To do
so, add 'return_origin' field to the structure tee_cmd_load_ta. The
Trusted OS shall update return_origin as part of TEE processing.
This change to 'struct tee_cmd_load_ta' interface requires a similar update
in AMD-TEE Trusted OS's TEE_CMD_ID_LOAD_TA interface.
This patch has been verified on Phoenix Birman setup. On older APUs,
return_origin value will be 0.
Cc: stable(a)vger.kernel.org
Tested-by: Sourabh Das <sourabh.das(a)amd.com>
Signed-off-by: Rijo Thomas <Rijo-john.Thomas(a)amd.com>
---
drivers/tee/amdtee/amdtee_if.h | 10 ++++++----
drivers/tee/amdtee/call.c | 30 +++++++++++++++++-------------
2 files changed, 23 insertions(+), 17 deletions(-)
diff --git a/drivers/tee/amdtee/amdtee_if.h b/drivers/tee/amdtee/amdtee_if.h
index ff48c3e47375..e2014e21530a 100644
--- a/drivers/tee/amdtee/amdtee_if.h
+++ b/drivers/tee/amdtee/amdtee_if.h
@@ -118,16 +118,18 @@ struct tee_cmd_unmap_shared_mem {
/**
* struct tee_cmd_load_ta - load Trusted Application (TA) binary into TEE
- * @low_addr: [in] bits [31:0] of the physical address of the TA binary
- * @hi_addr: [in] bits [63:32] of the physical address of the TA binary
- * @size: [in] size of TA binary in bytes
- * @ta_handle: [out] return handle of the loaded TA
+ * @low_addr: [in] bits [31:0] of the physical address of the TA binary
+ * @hi_addr: [in] bits [63:32] of the physical address of the TA binary
+ * @size: [in] size of TA binary in bytes
+ * @ta_handle: [out] return handle of the loaded TA
+ * @return_origin: [out] origin of return code after TEE processing
*/
struct tee_cmd_load_ta {
u32 low_addr;
u32 hi_addr;
u32 size;
u32 ta_handle;
+ u32 return_origin;
};
/**
diff --git a/drivers/tee/amdtee/call.c b/drivers/tee/amdtee/call.c
index e8cd9aaa3467..e9b63dcb3194 100644
--- a/drivers/tee/amdtee/call.c
+++ b/drivers/tee/amdtee/call.c
@@ -423,19 +423,23 @@ int handle_load_ta(void *data, u32 size, struct tee_ioctl_open_session_arg *arg)
if (ret) {
arg->ret_origin = TEEC_ORIGIN_COMMS;
arg->ret = TEEC_ERROR_COMMUNICATION;
- } else if (arg->ret == TEEC_SUCCESS) {
- ret = get_ta_refcount(load_cmd.ta_handle);
- if (!ret) {
- arg->ret_origin = TEEC_ORIGIN_COMMS;
- arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
-
- /* Unload the TA on error */
- unload_cmd.ta_handle = load_cmd.ta_handle;
- psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA,
- (void *)&unload_cmd,
- sizeof(unload_cmd), &ret);
- } else {
- set_session_id(load_cmd.ta_handle, 0, &arg->session);
+ } else {
+ arg->ret_origin = load_cmd.return_origin;
+
+ if (arg->ret == TEEC_SUCCESS) {
+ ret = get_ta_refcount(load_cmd.ta_handle);
+ if (!ret) {
+ arg->ret_origin = TEEC_ORIGIN_COMMS;
+ arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
+
+ /* Unload the TA on error */
+ unload_cmd.ta_handle = load_cmd.ta_handle;
+ psp_tee_process_cmd(TEE_CMD_ID_UNLOAD_TA,
+ (void *)&unload_cmd,
+ sizeof(unload_cmd), &ret);
+ } else {
+ set_session_id(load_cmd.ta_handle, 0, &arg->session);
+ }
}
}
mutex_unlock(&ta_refcount_mutex);
--
2.25.1
Hi,
I'm wondering if it is safe to call tee_invoke_supp_plugin_rpc() from within the OP-TEE kernel with both foreign and/or native exceptions masked ?
Regards,
Jacob
