Getting Started with OP-TEE for QEMU ARMv8

 Go to below link for more information:

https://blooggspott.blogspot.com/2022/04/op-tee-3.html

 

 
OPTEE is supported on different platforms which is a mentioned in below list.

PLATFORM and PLATFORM_FLAVOR are the flags used to select different platforms and chips.

Below are the platforms supported:

ARM Juno Board 

Atmel ATSAMA5D2-XULT Board 

Broadcom ns3 

DeveloperBox (Socionext Synquacer SC2A11) 

FSL ls1021a 

NXP ls1043ardb

NXP ls1046ardb

NXP ls1012ardb

NXP ls1028ardb

NXP ls1088ardb

NXP ls2088ardb

NXP ls1012afrwy

FSL i.MX6 Quad SABRE Lite Board 

FSL i.MX6 Quad SABRE SD Board 

SolidRun i.MX6 Quad Hummingboard Edge

SolidRun i.MX6 Dual Hummingboard Edge

SolidRun i.MX6 Dual Lite Hummingboard

SolidRun i.MX6 Solo Hummingboard Edge 

FSL i.MX6 UltraLite EVK Board 

NXP i.MX7Dual SabreSD Board 

NXP i.MX7Solo WaRP7 Board

NXP i.MX8MQEVK Board

NXP i.MX8MMEVK Board

ARM Foundation FVP

HiSilicon D02 

HiSilicon Hi3519AV100 Demo Board

HiKey Board (HiSilicon Kirin 620) 

HiKey960 Board (HiSilicon Kirin 960) 

Marvell ARMADA 7K Family 

Marvell ARMADA 8K Family 

Marvell ARMADA 3700 Family 

MediaTek MT8173 EVB Board 

Poplar Board (HiSilicon Hi3798C V200)

QEMU 

QEMUv8

Raspberry Pi 3 

Renesas RCAR

Renesas RZ/G 

Rockchip PX30 

Rockchip RK322X

Rockchip RK3399

STMicroelectronics b2260 - h410 (96boards fmt)

STMicroelectronics b2120 - h310 / h410 

STMicroelectronics STM32MP1 series 

Allwinner A64 Pine64 Board

Texas Instruments AM65x 

Texas Instruments DRA7xx

Texas Instruments AM57xx 

Texas Instruments AM43xx 

Xilinx Zynq 7000 ZC702 

Xilinx Zynq UltraScale+ MPSOC

Spreadtrum SC9860

OP-TEE supported on both 32-bit and 64-bit CPU.

Mixed mode is supported in OP-TEE.

On top of AArch64 core both AArch32 and AArch64 Trusted Applications are supported.

The heap and stack size can be changed.

In general or on most of platforms 32MB is used as secure RAM (for OP-TEE) i.e TZDRAM.

For TEE RAM 2MB and TA RAM 2MB. And 28MB is remaining for trusted applications.

During trusted applications build, in the source code by default stack size is set to 2KB and data to 32KB.

For example refer this source code:

https://github.com/linaro-swg/optee_examples/blob/master/hello_world/ta/user_ta_header_defines.h#L47

We can set these by changing the TA_STACK_SIZE and TA_DATA_SIZE.

But if more than 1MB of Stack/heap size required then trusted applications MMU table need to be Changed.

TZASC - Trustzone address space controller will be used to configure memory as secure. 

If we configured some of bits with by mentioning address ranges, then hardware wise that area of memory will be configured as secure.

OP-TEE can be loaded to this secure memory region (secure DRAM) and boot.

Loading and booting OP-TEE form SRAM is preferred and secure method.

But on some platforms, the size of SRAM is very less and that may not be possible.

OP-TEE size can be less than 300KB. But if we include more Psuedo trusted applications (PTA) and drivers, then size of OP-TEE will increase. May be go to 1MB.

In OP-TEE scheduler is not implemented.

Linux kernel is responsible for OP-TEE scheduling work.

In OP-TEE the time of process/application is very less may be in milli seconds.