linux-kernel - Re: [PATCH] tee: optee: add invoke

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Date:   Wed, 24 Mar 2021 10:53:13 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        linux-kernel@...r.kernel.org, op-tee@...ts.trustedfirmware.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] tee: optee: add invoke_fn tracepoints

On Wed, 24 Mar 2021 07:48:53 -0700
Guenter Roeck <linux@...ck-us.net> wrote:

> On Wed, Mar 24, 2021 at 07:34:07AM -0700, Guenter Roeck wrote:
> > On Wed, Feb 10, 2021 at 02:44:09PM +0800, Jisheng Zhang wrote:  
> > > Add tracepoints to retrieve information about the invoke_fn. This would
> > > help to measure how many invoke_fn are triggered and how long it takes
> > > to complete one invoke_fn call.
> > > 
> > > Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>  
> > 
> > arm64:defconfig:
> > 
> > make-arm64 -j drivers/tee/optee/call.o
> >   CALL    scripts/atomic/check-atomics.sh
> >   CALL    scripts/checksyscalls.sh
> >   CC      drivers/tee/optee/call.o
> > In file included from drivers/tee/optee/optee_trace.h:67,
> >                  from drivers/tee/optee/call.c:18:
> > ./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory
> >    95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
> >       |                                          ^
> > compilation terminated.
> >   
> 
> The problem also affects arm:imx_v6_v7_defconfig.
> 

I think it affects everything. The problem is that the
drivers/tee/optee/Makefile needs to be updated with:

CFLAGS_call.o := -I$(src)

otherwise the compiler wont know how to find the path to optee_tree.h.

This is described in:

   samples/trace_events/Makefile

-- Steve