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[v4,0/2] ACPI: Arm Generic Diagnostic Dump and Reset device

Message ID 20220120025759.8630-1-ilkka@os.amperecomputing.com (mailing list archive)
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Series ACPI: Arm Generic Diagnostic Dump and Reset device | expand

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Ilkka Koskinen Jan. 20, 2022, 2:57 a.m. UTC 
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 (fc720b592cc6)


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

     Not addressed:
 	* agdi_init() is still called from device_initcall() as it has to be
	  done after sdei_init()
	  (http://lists.infradead.org/pipermail/linux-arm-kernel/2022-January/709969.html)

	  Can be moved to acpi_init(), after Shuai Xue's patch get's approved
	  (http://lists.infradead.org/pipermail/linux-arm-kernel/2022-January/710268.html)


Ilkka Koskinen (2):
  ACPI: tables: Add AGDI to the list of known table signatures
  ACPI: AGDI: Add driver for Arm Generic Diagnostic Dump and Reset
    device

 drivers/acpi/arm64/Kconfig  |   8 +++
 drivers/acpi/arm64/Makefile |   1 +
 drivers/acpi/arm64/agdi.c   | 122 ++++++++++++++++++++++++++++++++++++
 drivers/acpi/tables.c       |   2 +-
 4 files changed, 132 insertions(+), 1 deletion(-)
 create mode 100644 drivers/acpi/arm64/agdi.c