Hi,
I have a couple of question about SMP support of linux driver.
We'd like to run multiple SP that uses secondary cores.
The first SP can initialize all secondary vCPUs when linux invokes cpu on for all secondary cores.
But the other SP doesn't initialize its secondary vCPUs.
If My understanding is correct,
they will be initialized when FFA_RUN calls to each vCPUs are called [1]
and FFA_RUN calls are called by Normal world driver in linux [2].
But I can't find any implementations regarding this in the latest upstream linux (v6.10).
Actually, I found ffa_cpu_ops in linux code [3], but couldn't the place where it is used.
I think that ffa_run has to be called in driver to initialize secodary vCPUs of secondary VMs.
Am I missing something in the code?
Or Is there no implementation yet in upstream?
I'd like to know about the current status of secondary VM SMP support in linux.
If linux driver doesn't support it yet,
Do you have any plan to make an implementation and merge it?
Thanks,
Sungbae Yoo.
[1] https://hafnium.readthedocs.io/en/latest/secure-partition-manager/secure-pa…
[2] https://lists.trustedfirmware.org/archives/list/hafnium@lists.trustedfirmwa…
[3] https://elixir.bootlin.com/linux/v6.11-rc5/source/drivers/firmware/arm_ffa/…
