Pull request for tpm-master-18042024

[Ilias Apalodimas]

OP-TEE fixes only on this PR, no TPM related ones.

The following changes since commit 2c3fa4b8add3cb6a440184ab67debc6867d383c0:

  sandbox: don't call os_close with invalid file descriptor (2024-04-17 17:06:16 -0600)

are available in the Git repository at:

  https://source.denx.de/u-boot/custodians/u-boot-tpm/ tags/tpm-master-18042024

for you to fetch changes up to b905599b36e3d8158c5cd045c26278416909b422:

  tee: remove common.h inclusion (2024-04-18 16:04:48 +0300)

Igor says:
"The problem initially was in the TEE sandbox driver implementation
 (drivers/tee/sandbox.c) and it's limitations, which doesn't
 permit to have multiple simultaneous sessions with different TAs.
 This is what actually happened in this CI run [1], firstly "optee_rpmb"
 cmd was executed (and after execution we had one session open), and
 then "scp03", which also makes calls to OP-TEE, however it fails
 in sandbox_tee_open_session() because of this check:

 if (state->ta) {
     printf("A session is already open\n");
     return -EBUSY;
 }

 I had two ways in mind to address that:
 1. Close a session on each optee_rpmb cmd invocation.
 I don't see any reason to keep this session open, as obviously
 there is no other mechanism (tbh, I don't know if DM calls ".remove" for active
 devices) to close it automatically before handing over control to
 Linux kernel. As a result we might end up with some orphaned sessions
 registered in OP-TEE OS core (obvious resource leak).
 2. Extend TEE sandbox driver, add support for multiple
 simultaneous sessions just to handle the case.

 I've chosen the first approach, as IMO it was "kill two birds with one stone",
 I could address resource leak in OP-TEE and bypass limitations of
 TEE sandbox driver."

Link: https://lore.kernel.org/u-boot/CAByghJZVRbnFUwJdgU534tvGA+DX2pArf0i7ySik=BrXgADe3Q@mail.gmail.com/

The CI https://source.denx.de/u-boot/custodians/u-boot-tpm/-/pipelines/20414
showed no problems

Please pull
/Ilias

----------------------------------------------------------------
optee fixes and cleanups
----------------------------------------------------------------
Igor Opaniuk (5):
      tee: optee: fix description in Kconfig
      cmd: optee_rpmb: close tee session
      cmd: optee_rpmb: build cmd for sandbox
      test: py: add optee_rpmb tests
      tee: remove common.h inclusion

 cmd/Kconfig                        |  4 +++-
 cmd/optee_rpmb.c                   | 23 +++++++++++++++++------
 drivers/tee/broadcom/chimp_optee.c |  3 ++-
 drivers/tee/optee/Kconfig          |  2 +-
 drivers/tee/optee/core.c           |  1 -
 drivers/tee/optee/i2c.c            |  1 -
 drivers/tee/optee/rpmb.c           |  1 -
 drivers/tee/optee/supplicant.c     |  2 +-
 drivers/tee/sandbox.c              |  2 +-
 drivers/tee/tee-uclass.c           |  1 -
 test/py/tests/test_optee_rpmb.py   | 20 ++++++++++++++++++++
 11 files changed, 45 insertions(+), 15 deletions(-)
 create mode 100644 test/py/tests/test_optee_rpmb.py