linux-kernel - Build error on -next due to tpm_crb.c changes? (was: Re: [PATCH v6 0/5] Add support for the TPM FF-A start method)

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Message-ID: <0ad035ff-400e-4b15-8b8f-40b69152ec46@leemhuis.info>
Date: Tue, 11 Mar 2025 16:21:38 +0100
From: Thorsten Leemhuis <linux@...mhuis.info>
To: Stuart Yoder <stuart.yoder@....com>, jarkko@...nel.org
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
 lenb@...nel.org, rafael@...nel.org, jgg@...pe.ca, peterhuewe@....de,
 sudeep.holla@....com, linux-integrity@...r.kernel.org,
 Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Build error on -next due to tpm_crb.c changes? (was: Re: [PATCH v6
 0/5] Add support for the TPM FF-A start method)

On 05.03.25 18:36, Stuart Yoder wrote:
> Firmware Framework for Arm A-profile (FF-A) is a messaging framework
> for Arm-based systems, and in the context of the TPM CRB driver is used
> to signal 'start' to a CRB-based TPM service which is hosted in an
> FF-A secure partition running in TrustZone.
> 
> These patches add support for the CRB FF-A start method defined
> in the TCG ACPI specification v1.4 and the FF-A ABI defined
> in the Arm TPM Service CRB over FF-A (DEN0138) specification:
> https://developer.arm.com/documentation/den0138/latest/
> [...]
> Stuart Yoder (5):
>   tpm_crb: implement driver compliant to CRB over FF-A
>   tpm_crb: clean-up and refactor check for idle support
>   ACPICA: add start method for Arm FF-A
>   tpm_crb: add support for the Arm FF-A start method
>   Documentation: tpm: add documentation for the CRB FF-A interface
> 
>  Documentation/security/tpm/tpm_ffa_crb.rst |  65 ++++
>  drivers/char/tpm/Kconfig                   |   9 +
>  drivers/char/tpm/Makefile                  |   1 +
>  drivers/char/tpm/tpm_crb.c                 | 105 +++++--
>  drivers/char/tpm/tpm_crb_ffa.c             | 348 +++++++++++++++++++++
>  drivers/char/tpm/tpm_crb_ffa.h             |  25 ++
>  include/acpi/actbl3.h                      |   1 +
> [...]

My daily linux-next builds for Fedora failed building on ARM64 today. I did
not bisect, but from the error message I suspect it's du to  patches in this
series touching drivers/char/tpm/tpm_crb.c :

ld: Unexpected GOT/PLT entries detected!
ld: Unexpected run-time procedure linkages detected!
ld: drivers/char/tpm/tpm_crb.o: in function `crb_cancel':
/builddir/foo//drivers/char/tpm/tpm_crb.c:496:(.text+0x2c0): undefined reference to `tpm_crb_ffa_start'
ld: drivers/char/tpm/tpm_crb.o: in function `__crb_request_locality':
/builddir/foo/drivers/char/tpm/tpm_crb.c:285:(.text+0x768): undefined reference to `tpm_crb_ffa_start'
ld: drivers/char/tpm/tpm_crb.o: in function `__crb_relinquish_locality':
/builddir/foo/drivers/char/tpm/tpm_crb.c:319:(.text+0x81c): undefined reference to `tpm_crb_ffa_start'
ld: drivers/char/tpm/tpm_crb.o: in function `__crb_request_locality':
/builddir/foo/drivers/char/tpm/tpm_crb.c:285:(.text+0x8bc): undefined reference to `tpm_crb_ffa_start'
ld: drivers/char/tpm/tpm_crb.o: in function `__crb_relinquish_locality':
/builddir/foo/drivers/char/tpm/tpm_crb.c:319:(.text+0x958): undefined reference to `tpm_crb_ffa_start'
ld: drivers/char/tpm/tpm_crb.o:/builddir/foo/drivers/char/tpm/tpm_crb.c:474: more undefined references to `tpm_crb_ffa_start' follow
ld: drivers/char/tpm/tpm_crb.o: in function `crb_acpi_add':
/builddir/foo/drivers/char/tpm/tpm_crb.c:830:(.text+0x1518): undefined reference to `tpm_crb_ffa_init'
make[2]: *** [scripts/Makefile.vmlinux:77: vmlinux] Error 1
make[1]: *** [/builddir/foo/Makefile:1242: vmlinux] Error 2
make: *** [Makefile:259: __sub-make] Error 2

Full log:
https://download.copr.fedorainfracloud.org/results/@kernel-vanilla/next/fedora-41-aarch64/08750241-next-next-all/builder-live.log.gz

Same problem on Fedora 40, 42 and 43. 

Ciao, Thorsten