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spd: tlkd: support new TLK SMCs for RPMB service

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This patch adds support to handle following TLK SMCs:
{TLK_SET_BL_VERSION, TLK_LOCK_BL_INTERFACE, TLK_BL_RPMB_SERVICE}

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

Brief:
TLK_SET_BL_VERSION: This SMC is issued by the bootloader to supply its
version to TLK. TLK can use this to prevent rollback attacks.

TLK_LOCK_BL_INTERFACE: This SMC is issued by bootloader before handing off
execution to the OS. This allows preventing sensitive SMCs being used
by the OS.

TLK_BL_RPMB_SERVICE: bootloader issues this SMC to sign or verify RPMB
frames.

Tested by: Tests TLK can receive the new SMCs issued by bootloader

Change-Id: I57c2d189a5f7a77cea26c3f8921866f2a6f0f944
Signed-off-by: Mustafa Yigit Bilgen <mbilgen@nvidia.com>
This commit is contained in:
Mustafa Yigit Bilgen 2018-12-03 15:53:38 -08:00 • committed by Varun Wadekar
parent a45c3e9d81
commit bd0c2f8d99
2 changed files with 6 additions and 0 deletions
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3
include/bl32/payloads/tlk.h
View file

@ -24,6 +24,9 @@
#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_SET_BL_VERSION TLK_TOS_YIELD_FID(0x6)
#define TLK_LOCK_BL_INTERFACE TLK_TOS_YIELD_FID(0x7)
#define TLK_BL_RPMB_SERVICE TLK_TOS_YIELD_FID(0x8)
#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)

3
services/spd/tlkd/tlkd_main.c
View file

@ -272,6 +272,9 @@ static uintptr_t tlkd_smc_handler(uint32_t smc_fid,
case TLK_TA_LAUNCH_OP:
case TLK_TA_SEND_EVENT:
case TLK_RESUME_FID:
case TLK_SET_BL_VERSION:
case TLK_LOCK_BL_INTERFACE:
case TLK_BL_RPMB_SERVICE:
if (!ns)
SMC_RET1(handle, SMC_UNK);