On Tue, Dec 16, 2025 at 09:44:41AM +0200, Jarkko Sakkinen wrote:
> This patch set contains accumulated patches, which gradually improve
> TPM2 HMAC session management and TPM driver memory management.
>
> RNG test
> ========
>
> I run this test both TPM1 and TPM2 chips using QEMU and swtpm:
>
> #!/bin/sh
>
> ctrl_c() {
> kill -15 $TEST_PID
> echo 0 > tracing_on
> echo nop > current_tracer
> echo > kprobe_events
> echo > set_ftrace_filter
> echo BYE
> exit
> }
>
> trap ctrl_c EXIT INT
> mount -t tracefs none /sys/kernel/tracing
>
> set -e
>
> cd /sys/kernel/tracing
> echo function > current_tracer
> echo p:tpm_get_random tpm_get_random > kprobe_events
> echo tpm_get_random > set_ftrace_filter
> echo 1 > tracing_on
> TEST_PID=$(cat /dev/hwrng > /dev/null &)
> echo > trace
> cat trace_pipe &
> sleep 10
Oops, and old version. This was the one I run:
#!/bin/sh
ctrl_c() {
set +e
echo 0 > tracing_on
echo nop > current_tracer
echo BYE
exit
}
trap ctrl_c EXIT INT
mount -t tracefs none /sys/kernel/tracing
set -e
cd /sys/kernel/tracing
echo function > current_tracer
echo p:tpm_get_random tpm_get_random > kprobe_events
echo tpm_get_random > set_ftrace_filter
echo 1 > tracing_on
cat /dev/hwrng > /dev/null &
echo > trace
cat trace_pipe &
sleep 10
>
> Change Log
> ==========
>
> v7:
> - Updated cover letter to match better the current state of the patch
> set.
> v6:
> - OK, so I decided to send one more update with managed allocations
> moved to the tail so that it does not block reviewing more trivial
> patches.
> - Trimmed some of the patches and improved commit messages.
> v5:
> - I decided to add the managed allocation patch to this and take it from
> the master branch for the time being, as it needs more eyes despite
> having already one reviewed-by tag (especially tested-by tags).
>
> Jarkko Sakkinen (12):
> KEYS: trusted: Use get_random-fallback for TPM
> KEYS: trusted: Use get_random_bytes_wait() instead of tpm_get_random()
> tpm2-sessions: Define TPM2_NAME_MAX_SIZE
> KEYS: trusted: Open code tpm2_buf_append()
> KEYS: trusted: Remove dead branch from tpm2_unseal_cmd
> KEYS: trusted: Re-orchestrate tpm2_read_public() calls
> tpm2-sessions: Remove AUTH_MAX_NAMES
> tpm: Orchestrate TPM commands in tpm_get_random()
> tpm: Change tpm_get_random() opportunistic
> tpm-buf: Merge TPM_BUF_BOUNDARY_ERROR and TPM_BUF_OVERFLOW
> tpm-buf: Implement managed allocations
> tpm-buf: Remove tpm_buf_append_handle
>
> drivers/char/tpm/tpm-buf.c | 154 ++++-----
> drivers/char/tpm/tpm-interface.c | 145 ++++++++-
> drivers/char/tpm/tpm-sysfs.c | 23 +-
> drivers/char/tpm/tpm.h | 3 -
> drivers/char/tpm/tpm1-cmd.c | 198 ++++--------
> drivers/char/tpm/tpm2-cmd.c | 371 +++++++---------------
> drivers/char/tpm/tpm2-sessions.c | 272 ++++++----------
> drivers/char/tpm/tpm2-space.c | 44 ++-
> drivers/char/tpm/tpm_vtpm_proxy.c | 30 +-
> include/linux/tpm.h | 77 +++--
> security/keys/trusted-keys/trusted_tpm1.c | 70 ++--
> security/keys/trusted-keys/trusted_tpm2.c | 329 ++++++++++---------
> 12 files changed, 776 insertions(+), 940 deletions(-)
>
> --
> 2.39.5
>
BR, Jarkko