linux-kernel - Re: [PATCH 2/2] tpm: of: If available Use linux,sml-log to get the log and its size

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Message-ID: <877ci74u0w.fsf@mail.lhotse>
Date: Tue, 12 Mar 2024 21:35:43 +1100
From: Michael Ellerman <mpe@...erman.id.au>
To: Stefan Berger <stefanb@...ux.ibm.com>, Jarkko Sakkinen
 <jarkko@...nel.org>, linux-integrity@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org, rnsastry@...ux.ibm.com, peterhuewe@....de,
 viparash@...ibm.com
Subject: Re: [PATCH 2/2] tpm: of: If available Use linux,sml-log to get the
 log and its size

Stefan Berger <stefanb@...ux.ibm.com> writes:
> On 3/7/24 15:00, Jarkko Sakkinen wrote:
>> On Thu Mar 7, 2024 at 9:57 PM EET, Jarkko Sakkinen wrote:
>>> in short summary: s/Use/use/
>>>
>>> On Wed Mar 6, 2024 at 5:55 PM EET, Stefan Berger wrote:
>>>> If linux,sml-log is available use it to get the TPM log rather than the
>>>> pointer found in linux,sml-base. This resolves an issue on PowerVM and KVM
>>>> on Power where after a kexec the memory pointed to by linux,sml-base may
>>>> have been corrupted. Also, linux,sml-log has replaced linux,sml-base and
>>>> linux,sml-size on these two platforms.
>>>>
>>>> Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
>>>
>>> So shouldn't this have a fixed tag, or not?
>> 
>> In English: do we want this to be backported to stable kernel releases or not?
>
> Ideally, yes. v3 will have 3 patches and all 3 of them will have to be 
> backported *together* and not applied otherwise if any one of them 
> fails. Can this be 'guaranteed'?

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