OPTEE Log Level

1. OPTEE Log

 

1) 5가지의 Log 가 존재

TEE Core (OPTEE OS) : CFG_TEE_CORE_LOG_LEVEL
TA(Trusted Application) : CFG_TEE_TA_LOG_LEVEL
Client : CFG_TEE_CLIENT_LOG_LEVEL
Supplicant : CFG_TEE_SUPP_LOG_LEVEL
ARM-TF(Trusted Firmware) :  LOG_LEVEL

 

2) 각 레벨은 다음과 같이 구분 (ARM-TF 제외)

0 : None
1 : Error
2 : Error + Warning
3 : Error + Warning + Debug
4 : Error + Warning + Debug + Flow

ARM-TF : 10 ~ 50(10 단위, ERROR, NOTICE, WARINING, INFO, VERBOSE)

 

 

2. 설정 우선 순위 (ARM-TF 제외)

 

1. Make arguments ('make CFG_FOO=bar...')
2. The file specified by $(CFG_OPTEE_CONFIG) (if defined)
3. The environment ('CFG_FOO=bar make...')
4. The platform-specific configuration file: core/arch/arm32/plat-*/conf.mk
5. <optee-project>/optee_os/mk/config.mk
6. Subsystem-specific makefiles (*/sub.mk)

 

 

3. Make argument 제외한 실제 수정 위치

 

1) CFG_TEE_CORE_LOG_LEVEL : <optee-project>/build/common.mk
  - Makefile에서 최초로 참조
2) CFG_TEE_TA_LOG_LEVEL : <optee-project>/optee_os/mk/config.mk
3) CFG_TEE_CLIENT_LOG_LEVEL, CFG_TEE_SUPP_LOG_LEVEL : <optee-project>/optee_client/config.mk
4) ARM-TF Log level :
   (1) <optee-project>/build/Makefile
   (2) <optee-project>/arm-trusted-firmware/plat/rpi3/platform.mk => RPI3_RUNTIME_UART를 -1이 아닌 값으로 변경.

  # UART to use at runtime. -1 means the runtime UART is disabled.
  # Any other value means the default UART will be used.
  RPI3_RUNTIME_UART := -1