Hi Mei Jianqiang,

In my environment, hafnium is running as spmc in s-el2, and my question is as follows:

Can you tell a bit more on your setup, if possible, do you intend to use OP-TEE as SEL1 payload / secure partition? Are you running linux in the normal world?

1. In the spmc_optee_sp_manifest.dts file, there is an attribute load_address = <0x0 0xFF200000>.

What do the two parts of load_address mean respectively? Any details on other configurations in the dts file?

In the TF-A tree plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts is a sample device tree consumed by Hafnium/SPMC to describe the system properties and declare secure partitions. Please refer to https://trustedfirmware-a.readthedocs.io/en/latest/components/secure-partiti... The load_address field specifies the location at which the SPMC finds a 'partition package'. It consists of a partition's DT blob and a partition image. https://trustedfirmware-a.readthedocs.io/en/latest/components/secure-partiti...

In this sample 0x0 is the high 32b part of the physical address and 0xFF200000 the lower 32 bits.

2. If only one core is available during the startup of hafnium, how to configure it?

In this case, when I set CPUS_PER_CLUSTER 1 in fvp-defs.dtsi file of ATF reference code, the building error is: Duplicate node name /cpus/cpu@20000. Why?

I don't believe you should do change directly in this file, but rather provide the system topology through the TF-A command line by using FVP_MAX_CPUS_PER_CLUSTER/FVP_CLUSTER_COUNT/FVP_MAX_PE_PER_CPU

The device tree should describe cpus as they exist when the system is booted at run-time.

When TF-A and Hafnium boot, only a single primary core runs anyways so is this really what you intend to do?

Regards, Olivier.

________________________________ From: 梅建强(禹夜) meijianqiang.mjq@alibaba-inc.com Sent: 24 November 2022 11:33 To: hafnium-owner hafnium-owner@lists.trustedfirmware.org Subject: run hafnium as spmc at s-el2

Hello expert,

I'm a developer at Alibaba Cloud, and I'm having some problems using hafnium.

In my environment, hafnium is running as spmc in s-el2, and my question is as follows:

1) In the spmc_optee_sp_manifest.dts file, there is an attribute load_address = <0x0 0xFF200000>.

What do the two parts of load_address mean respectively? Any details on other configurations in the dts file?

2) If only one core is available during the startup of hafnium, how to configure it?

In this case, when I set CPUS_PER_CLUSTER 1 in fvp-defs.dtsi file of ATF reference code, the building error is: Duplicate node name /cpus/cpu@20000. Why?

Looking forward to your reply. Thank you very much~