topic Re: how to enlarge TEE memory size in i.MX Processors

how to enlarge TEE memory size

jiankang — Thu, 02 Dec 2021 08:45:25 GMT

hello，

I want to enlarge the DDR memory region used by TEE.

please help to provide the way about how to config DDR memory region type as secure ?

and how to config memory type as shared by secure and nonsecure ?

in ATF /optee / uboot / kernel DTB...

thanks a lot!

Re: how to enlarge TEE memory size

igorpadykov — Thu, 02 Dec 2021 10:03:43 GMT

Hi Jiankang

file was sent via mail.

Best regards
igor

Re: how to enlarge TEE memory size

jiankang — Thu, 02 Dec 2021 11:44:20 GMT

hello，

I checked the attachment.

but it only mentioned about how to change whole DDR size. TEE always use top 32M address in DDR.

anyway I already enlarge the TEE from 32M to 48M.

could you provide how to config mem type as secure or shared ?

as imx8 serial products don't use "plat-imx/tzasc.c" to config the memory type in DDR...

what I want to do is just mark memory in DDR as secure(only accessable by TEE), please help to check again!

thanks.

Re: how to enlarge TEE memory size

igorpadykov — Thu, 02 Dec 2021 13:08:53 GMT

one can also to look at Chapter 5 Configuring OP-TEE i.MX Porting Guide

Best regards
igor

Re: how to enlarge TEE memory size

jiankang — Fri, 03 Dec 2021 03:01:24 GMT

hello，

thanks for your help.

but I still cannot config the memory type with the document.

As it is mentioned in the document, memory type should be config by TZASC feature in OPTEE.

but for imx8qm serial products. it doesn't support this feature.

103 else ifneq (,$(filter $(PLATFORM_FLAVOR),$(mx8qm-flavorlist)))
104 $(call force,CFG_MX8QM,y)
105 $(call force,CFG_ARM64_core,y)
106 $(call force,CFG_TEE_CORE_NB_CORE,6)
107 $(call force,CFG_NXP_CAAM,n)
108 $(call force,CFG_TZC380,n)
109 $(call force,CFG_CSU,n)
110 $(call force,CFG_IMX_UART,n)
111 $(call force,CFG_IMX_SNVS,n)

please help to check again, about how to config the memory in DDR as secure ?

in OPTEE or ATF or Uboot or secofw ?

thanks.