TPM DEVICE DRIVER: tpmdd-next-v6.18-rc2

The following changes since commit f406055cb18c6e299c4a783fc1effeb16be41803:

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux (2025-10-17 13:04:21 -1000)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git tags/tpmdd-next-v6.18-rc2

for you to fetch changes up to dbfdaeb381a49a7bc753d18e2876bc56a15e01cc:

tpm_crb: Add idle support for the Arm FF-A start method (2025-10-18 14:33:22 +0300)

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Hi,

If possible, could you still pick this change for v6.18 [1]? The change in question corrects the state transitions for ARM FF-A to match the spec and how tpm_crb behaves on other platforms.

[1] https://lore.kernel.org/linux-integrity/[email protected]/

BR, Jarkko

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Stuart Yoder (1):
tpm_crb: Add idle support for the Arm FF-A start method

 drivers/char/tpm/tpm_crb.c | 29 ++++++++++++++++++++---------
 1 file changed, 20 insertions(+), 9 deletions(-)

I don't have the specific hardware to test this but I did a quick compilation test:

make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 tinyconfig && ./scripts/config --file .config -e CONFIG_KEYS -e CONFIG_TCG_TPM -e CONFIG_64BIT -e CONFIG_TRUSTED_KEYS -e CONFIG_TTY -e CONFIG_PROCFS -e CONFIG_SYSFS -e CONFIG_TCG_VTPM_PROXY -e CONFIG_EFI -e CONFIG_ACPI -e CONFIG_ARM_FFA_TRANSPORT -e CONFIG_TCG_CRB && yes '' | make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 oldconfig && make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 -j$(nproc)

And in addition with similar features x86 compilation test and run my smoke tests with swtpm emulating tpm_crb (kselftest, keyring, trusted keys type of stuff automated).

Those should localize any possible corrateral damage to only FFA, if any (and not very likely).

BR, Jarkko