linux-kernel - Re: [PATCH v8 0/4] tpm: Preserve TPM measurement log across kexec (ppc64)

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Message-ID: <ce08b0af-fb1b-0ade-61ac-f66e95d6eb6a@linux.ibm.com>
Date:   Mon, 12 Sep 2022 09:00:47 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     nayna@...ux.ibm.com, nasastry@...ibm.com, mpe@...erman.id.au,
        "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-integrity <linux-integrity@...r.kernel.org>
Subject: Re: [PATCH v8 0/4] tpm: Preserve TPM measurement log across kexec
 (ppc64)


Hi Rob,

   can you take this series in your tree?

Regards,
    Stefan

On 9/1/22 17:46, Stefan Berger wrote:
> The of-tree subsystem does not currently preserve the IBM vTPM 1.2 and
> vTPM 2.0 measurement logs across a kexec on PowerVM and PowerKVM. This
> series fixes this for the kexec_file_load() syscall using the flattened
> device tree (fdt) to carry the TPM measurement log's buffer across kexec.
> 
>     Stefan
> 
> v8:
>   - Added Jarkko's, Coiby's, and Rob's tags
>   - Rebase on v6.0-rc3 that absorbed 2 already upstreamed patches
> 
> v7:
>   - Added Nageswara's Tested-by tags
>   - Added back original comment to inline function and removed Jarkko's R-b tag
> 
> v6:
>   - Add __init to get_kexec_buffer as suggested by Jonathan
>   - Fixed issue detected by kernel test robot
> 
> v5:
>   - Rebased on 1 more patch that would otherwise create merge conflicts
> 
> v4:
>   - Rebased on 2 patches that would otherwise create merge conflicts;
>     posting these patches in this series with several tags removed so
>     krobot can test the series already
>   - Changes to individual patches documented in patch descripitons
> 
> v3:
>   - Moved TPM Open Firmware related function to drivers/char/tpm/eventlog/tpm_of.c
> 
> v2:
>   - rearranged patches
>   - fixed compilation issues for x86
> 
> Palmer Dabbelt (1):
>    drivers: of: kexec ima: Support 32-bit platforms
> 
> Stefan Berger (3):
>    tpm: of: Make of-tree specific function commonly available
>    of: kexec: Refactor IMA buffer related functions to make them reusable
>    tpm/kexec: Duplicate TPM measurement log in of-tree for kexec
> 
>   drivers/char/tpm/eventlog/of.c |  31 +--
>   drivers/of/kexec.c             | 336 ++++++++++++++++++++++++++++-----
>   include/linux/kexec.h          |   6 +
>   include/linux/of.h             |   9 +-
>   include/linux/tpm.h            |  36 ++++
>   kernel/kexec_file.c            |   6 +
>   6 files changed, 346 insertions(+), 78 deletions(-)
> 
> 
> base-commit: b90cb1053190353cc30f0fef0ef1f378ccc063c5