linux-kernel - xFrom e2ebdef7c3a5e7ba998ff20bf62806c388efeaac Mon Sep 17 00:00:00 2001

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Message-Id: <20220304052241.151946-1-ilkka@os.amperecomputing.com>
Date:   Thu,  3 Mar 2022 21:22:39 -0800
From:   Ilkka Koskinen <ilkka@...amperecomputing.com>
To:     lorenzo.pieralisi@....com, guohanjun@...wei.com,
        sudeep.holla@....com, rafael@...nel.org, linux@...linux.org.uk
Cc:     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: xFrom e2ebdef7c3a5e7ba998ff20bf62806c388efeaac Mon Sep 17 00:00:00 2001

Hi Lorenzo,

Would you prefer this version, which doesn't have platform device/driver
any more?

--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