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Date:   Fri, 11 Nov 2022 10:21:43 +0800
From:   Coiby Xu <coxu@redhat.com>
To:     Michael Ellerman <mpe@ellerman.id.au>
Cc:     Stefan Berger <stefanb@linux.ibm.com>, kexec@lists.infradead.org,
        devicetree@vger.kernel.org, linux-integrity@vger.kernel.org,
        linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        nayna@linux.ibm.com, nasastry@in.ibm.com,
        Baoquan He <bhe@redhat.com>
Subject: Re: [PATCH v8 0/4] tpm: Preserve TPM measurement log across kexec
 (ppc64)
Message-ID: <20221111022143.xvpi3pfwwrw4qda2@Rk>
References: <20220901214610.768645-1-stefanb@linux.ibm.com>
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In-Reply-To: <20220901214610.768645-1-stefanb@linux.ibm.com>
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Hi Michael,

Could the PowerPC tree take this patch set which resolves a
PowerVM/KVM-specific issue?

On Thu, Sep 01, 2022 at 05:46:06PM -0400, 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
>-- 
>2.35.1
>

-- 
Best regards,
Coiby