Re: Calling tee_invoke_supp_plugin_rpc() with exceptions masked

On Fri, 5 May 2023 at 17:37, Jens Wiklander jens.wiklander@linaro.org wrote:

Hi Jacob,

On Fri, May 5, 2023 at 2:01 PM Jacob Kroon Jacob.Kroon@axis.com wrote:

...

Hi,

I'm wondering if it is safe to call tee_invoke_supp_plugin_rpc() from within the OP-TEE kernel with both foreign and/or native exceptions masked ?

tee_invoke_supp_plugin_rpc() must be called from a normal thread context, the exceptions can be masked even if it's probably not a good idea.

Yeah, especially if expensive operations are performed by that RPC with interrupts masked, you are probably going to get CPU stall messages from the Linux scheduler.

-Sumit

Cheers, Jens