[PATCH 1/3] tpm: Disable TCG_TPM2_HMAC by default
Jarkko Sakkinen
jarkko at kernel.org
Wed May 22 16:11:23 UTC 2024
On Wed May 22, 2024 at 5:58 PM EEST, Vitor Soares wrote:
> I did run with ftrace, but need some more time to go through it.
>
> Here the step I did:
> kernel config:
> CONFIG_FUNCTION_TRACER
> CONFIG_FUNCTION_GRAPH_TRACER
>
> ftrace:
> # set filters
> echo tpm* > set_ftrace_filter
>
> # set tracer
> echo function_graph > current_tracer
>
> # take the sample
> echo 1 > tracing_on; time modprobe tpm_tis_spi; echo 0 > tracing_on
>
> regards,
> Vitor Soares
I'm now compiling distro kernel (OpenSUSE) for NUC7 with v6.10 contents.
After I have that setup, I'll develop a perf test either with perf or
bpftrace. I'll come back with the possible CONFIG_* that should be in
place in your kernel. Might take up until next week as I have some
conference stuff to prepare but I try to have stuff ready early next
week.
No need to rush with this as long as possible patches go to rc2 or rc3.
Let's do a proper analysis instead.
In the meantime you could check if you get perf and/or bpftrace to
your image that use to boot up your device. Preferably both but
please inform about this.
Fair enough?
BR, Jarkko
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