linux-kernel - Re: [PATCH v5 RESEND 0/2] ACPI: Arm Generic Diagnostic Dump and Reset device

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Message-ID: <alpine.DEB.2.22.394.2203071424290.3354@ubuntu200401>
Date:   Mon, 7 Mar 2022 14:29:10 -0800 (PST)
From:   Ilkka Koskinen <ilkka@...amperecomputing.com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
cc:     Ilkka Koskinen <ilkka@...amperecomputing.com>,
        guohanjun@...wei.com, sudeep.holla@....com, rafael@...nel.org,
        linux@...linux.org.uk, lenb@...nel.org, robert.moore@...el.com,
        james.morse@....com, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        patches@...erecomputing.com, scott@...amperecomputing.com,
        darren@...amperecomputing.com
Subject: Re: [PATCH v5 RESEND 0/2] ACPI: Arm Generic Diagnostic Dump and
 Reset device



On Fri, 4 Mar 2022, Lorenzo Pieralisi wrote:
> On Thu, Mar 03, 2022 at 09:40:01PM -0800, Ilkka Koskinen wrote:
>> Hi Lorenzo,
>>
>> Would you prefer this version, which doesn't have platform
>> device/driver any more?
>
> I thought about that and in order to keep consistency it is better to
> keep the platform device model, so please resend the latest version
> platform device based and I will ACK it (hopefully it is not too late
> for v5.18).

Sure, I can do that. Just one question, do you still prefer agdi_init() 
getting called from acpi_init() or via device_initcall()?

> Please note before resending it that sdei_event_unregister() requires a
> retry loop since it can return -EINPROGRESS (see sdei_unregister_ghes()).

Thanks for pointing out, I'll fix it.

Cheers, Ilkka


>
> Thanks,
> Lorenzo
>
>>
>> --Ilkka
>>
>>
>> ----
>>
>> Arm Generic Diagnostic Dump and Reset device enables a maintainer to
>> request OS to perform a diagnostic dump and reset a system via SDEI
>> event or an interrupt. This patchset adds support for the SDEI path.
>>
>> I do have a patch to enable the interrupt path as well but I'm holding
>> it back since AGDI table is missing interrupt configuration fields
>> (trigger type etc.).
>>
>> The recently published specification is available at
>> https://developer.arm.com/documentation/den0093/latest
>>
>> The patchset was tested on Ampere Altra/Mt. Jade.
>>
>> The patchset applies on top of
>>   git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm bleeding-edge (9db71e8e3027)
>>
>> I also tested it works on top of Shuai Xue's new patches in bleeding-edge branch (c6f4ba2d2b9a)
>>
>> From v1:
>>      * Moved pdata to the stack and dropped unnecessary kzalloc() in agdi_init()
>>      * Changed the ACPICA patch upstreaming order comment in the paragraph above
>>
>> From v2:
>>      * The first patch was split. The most of it was merged to ACPICA project
>>        at first and later ported to linux-acpi
>>        (fd919e37cb15914c6fe13e13d530a4f732407c6d). The rest are in the first
>>        patch.
>>
>> From v3:
>>      Fixed:
>> 	* Moved header files in alphabetical order and removed unnecessary ones
>>
>> From v4:
>> 	* Platform device/driver stuff removed
>> 	* acpi_agdi_init() call moved from device_initcall to acpi_init()
>> 	* Slightly modified Kconfig text to keep checkpatch happy
>>
>> Ilkka Koskinen (2):
>>   ACPI: tables: Add AGDI to the list of known table signatures
>>   ACPI: AGDI: Add support for Arm Generic Diagnostic Dump and Reset
>>     device
>>
>>  drivers/acpi/arm64/Kconfig  | 10 +++++++
>>  drivers/acpi/arm64/Makefile |  1 +
>>  drivers/acpi/arm64/agdi.c   | 52 +++++++++++++++++++++++++++++++++++++
>>  drivers/acpi/bus.c          |  2 ++
>>  drivers/acpi/tables.c       |  2 +-
>>  include/linux/acpi_agdi.h   | 13 ++++++++++
>>  6 files changed, 79 insertions(+), 1 deletion(-)
>>  create mode 100644 drivers/acpi/arm64/agdi.c
>>  create mode 100644 include/linux/acpi_agdi.h
>>
>> --
>> 2.17.1
>>
>