tlkd: support new TLK SMCs

This patch adds support to handle following TLK SMCs:
{TLK_SS_REGISTER_HANDLER, TLK_REGISTER_NS_DRAM_RANGES, TLK_SET_ROOT_OF_TRUST}

These SMCs need to be supported in ATF in order to forward them to
TLK. Otherwise, these functionalities won't work.

Brief:
TLK_SS_REGISTER_HANDLER: This SMC is issued by TLK Linux Driver to
set up secure storage buffers.

TLK_REGISTER_NS_DRAM_RANGES: Cboot performs this SMC during boot to
pass NS memory ranges to TLK.

TLK_SET_ROOT_OF_TRUST: Cboot performs this SMC during boot to pass
Verified Boot parameters to TLK.

Change-Id: I18af35f6dd6f510dfc22c1d1d1d07f643c7b82bc
Reviewed-on: https://git-master.nvidia.com/r/1643851

Signed-off-by: Mihir Joshi <mihirj@nvidia.com>

include/bl32/payloads/tlk.h

@@ -20,7 +20,9 @@
  */
 #define TLK_REGISTER_LOGBUF	TLK_TOS_YIELD_FID(0x1)
 #define TLK_REGISTER_REQBUF	TLK_TOS_YIELD_FID(0x2)
-#define TLK_REGISTER_NS_DRAM	TLK_TOS_YIELD_FID(0x4)
+#define TLK_SS_REGISTER_HANDLER	TLK_TOS_YIELD_FID(0x3)
+#define TLK_REGISTER_NS_DRAM_RANGES	TLK_TOS_YIELD_FID(0x4)
+#define TLK_SET_ROOT_OF_TRUST	TLK_TOS_YIELD_FID(0x5)
 #define TLK_RESUME_FID		TLK_TOS_YIELD_FID(0x100)
 #define TLK_SYSTEM_SUSPEND	TLK_TOS_YIELD_FID(0xE001)
 #define TLK_SYSTEM_RESUME	TLK_TOS_YIELD_FID(0xE002)

services/spd/tlkd/tlkd_main.c

@@ -195,14 +195,18 @@ static uintptr_t tlkd_smc_handler(uint32_t smc_fid,
 	 * b. register shared memory with the SP for passing args
 	 *    required for maintaining sessions with the Trusted
 	 *    Applications.
-	 * c. register non-secure world's memory map with the OS
-	 * d. open/close sessions
-	 * e. issue commands to the Trusted Apps
-	 * f. resume the preempted yielding SMC call.
+	 * c. register shared persistent buffers for secure storage
+	 * d. register NS DRAM ranges passed by Cboot
+	 * e. register Root of Trust parameters from Cboot for Verified Boot
+	 * f. open/close sessions
+	 * g. issue commands to the Trusted Apps
+	 * h. resume the preempted yielding SMC call.
 	 */
 	case TLK_REGISTER_LOGBUF:
 	case TLK_REGISTER_REQBUF:
-	case TLK_REGISTER_NS_DRAM:
+	case TLK_SS_REGISTER_HANDLER:
+	case TLK_REGISTER_NS_DRAM_RANGES:
+	case TLK_SET_ROOT_OF_TRUST:
 	case TLK_OPEN_TA_SESSION:
 	case TLK_CLOSE_TA_SESSION:
 	case TLK_TA_LAUNCH_OP:
@@ -400,6 +404,7 @@ static uintptr_t tlkd_smc_handler(uint32_t smc_fid,
 		SMC_RET2(handle, TLK_VERSION_MAJOR, TLK_VERSION_MINOR);
 
 	default:
+		WARN("%s: Unhandled SMC: 0x%x\n", __func__, smc_fid);
 		break;
 	}