Fix and document the Secure Channel Protocol03 emulator.
Fixes: 5a8783c80c39 ("drivers: tee: sandbox: SCP03 control emulator")
Signed-off-by: Jorge Ramirez-Ortiz <jo...@foundries.io>
Reviewed-by: Simon Glass <s...@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
---
drivers/tee/sandbox.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/tee/sandbox.c b/drivers/tee/sandbox.c
index 35e8542fa3..86219a9bb1 100644
--- a/drivers/tee/sandbox.c
+++ b/drivers/tee/sandbox.c
@@ -119,6 +119,7 @@ static u32 pta_scp03_invoke_func(struct udevice *dev, u32
func, uint num_params,
{
u32 res;
static bool enabled;
+ static bool provisioned;
switch (func) {
case PTA_CMD_ENABLE_SCP03:
@@ -130,12 +131,18 @@ static u32 pta_scp03_invoke_func(struct udevice *dev, u32
func, uint num_params,
if (res)
return res;
- if (!enabled) {
+ /* If SCP03 was not enabled, enable it */
+ if (!enabled)
enabled = true;
- } else {
- }
- if (params[0].u.value.a)
+ /* If SCP03 was not provisioned, provision new keys */
+ if (params[0].u.value.a && !provisioned)
+ provisioned = true;
+
+ /*
+ * Either way, we asume both operations succeeded and that
+ * the communication channel has now been stablished
+ */
return TEE_SUCCESS;
default:
--
2.34.1
