TEE kexec fixes for v5.14

Hello arm-soc maintainers,

Please pull these fixes relating to OP-TEE, ftpm (firmware TPM), and tee_bnxt_fw (Broadcom BNXT firmware manager) drivers in kexec and kdump (emergency kexec) based workflows.

The two patches "firmware: tee_bnxt: Release TEE shm, session, and context during kexec" and "tpm_ftpm_tee: Free and unregister TEE shared memory during kexec" are acked by their respective maintainers.

For more details please see the description of the last patch set
https://lore.kernel.org/lkml/20210614223317.999867-1-tyhicks(a)linux.microsoft.com/

Thanks,
Jens

The following changes since commit 2734d6c1b1a089fb593ef6a23d4b70903526fe0c:

Linux 5.14-rc2 (2021-07-18 14:13:49 -0700)

are available in the Git repository at:

git://git.linaro.org:/people/jens.wiklander/linux-tee.git tags/tee-kexec-fixes-for-v5.14

for you to fetch changes up to 914ab19e471d8fb535ed50dff108b0a615f3c2d8:

firmware: tee_bnxt: Release TEE shm, session, and context during kexec (2021-07-21 07:55:50 +0200)

----------------------------------------------------------------
tee: Improve support for kexec and kdump

This fixes several bugs uncovered while exercising the OP-TEE, ftpm (firmware TPM), and tee_bnxt_fw (Broadcom BNXT firmware manager) drivers with kexec and kdump (emergency kexec) based workflows.

----------------------------------------------------------------
Allen Pais (2):
optee: fix tee out of memory failure seen during kexec reboot
firmware: tee_bnxt: Release TEE shm, session, and context during kexec

Jens Wiklander (1):
tee: add tee_shm_alloc_kernel_buf()

Sumit Garg (1):
tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flag

Tyler Hicks (4):
optee: Fix memory leak when failing to register shm pages
optee: Refuse to load the driver under the kdump kernel
optee: Clear stale cache entries during initialization
tpm_ftpm_tee: Free and unregister TEE shared memory during kexec

 drivers/char/tpm/tpm_ftpm_tee.c         |  8 +++---
 drivers/firmware/broadcom/tee_bnxt_fw.c | 14 ++++++++---
 drivers/tee/optee/call.c                | 38 ++++++++++++++++++++++++++---
 drivers/tee/optee/core.c                | 43 ++++++++++++++++++++++++++++++++-
 drivers/tee/optee/optee_private.h       |  1 +
 drivers/tee/optee/rpc.c                 |  5 ++--
 drivers/tee/optee/shm_pool.c            | 20 ++++++++++++---
 drivers/tee/tee_shm.c                   | 20 ++++++++++++++-
 include/linux/tee_drv.h                 |  2 ++
 9 files changed, 132 insertions(+), 19 deletions(-)

From: Arnd Bergmann <[email protected]>

Merged into arm/fixes, thanks!

merge commit: 64429b9e0e1dc05cbe4f88076909fe0c4d2d29dc

Arnd