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

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Message-ID: <YiIsYzGeeYWPQKsp@lpieralisi>
Date:   Fri, 4 Mar 2022 15:13:44 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Ilkka Koskinen <ilkka@...amperecomputing.com>
Cc:     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 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).

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

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
>