linux-kernel - [RFC PATCH 0/4] ACPI: processor: refactor acpi_processor_{get

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Date: Tue,  9 Apr 2024 15:05:29 +0000
From: Miguel Luis <miguel.luis@...cle.com>
To: Jonathan.Cameron@...wei.com, "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: rmk+kernel@...linux.org.uk, miguel.luis@...cle.com
Subject: [RFC PATCH 0/4] ACPI: processor: refactor acpi_processor_{get_info|remove}

Both acpi_processor_get_info and acpi_processor_remove functions have
architecture dependent functionality enabled via CONFIG_ACPI_HOTPLUG_CPU.

Current pre-processor guards are restricting too much of functionality which
makes it dificult to integrate other features such as Virtual CPU
hotplug/unplug for arm64.

This series, applied on top of v6.9-rc3, suggests a refactoring on these two
functions with the intent to understand them better and hopefully ease
integration of more functionality.

Apart from patches 2/4 and 3/4, which could be squashed but left them separated
intentionally so it would ease reviewing, changes are self-contained.

So far I've boot tested it successfully alone and as a prefix for vCPU hotplug/unplug
patches [1], on arm64.

[1]: https://lore.kernel.org/linux-arm-kernel/Zbp5xzmFhKDAgHws@shell.armlinux.org.uk/

Miguel Luis (4):
  ACPI: processor: refactor acpi_processor_get_info: evaluation of
    processor declaration
  ACPI: processor: refactor acpi_processor_get_info: isolate cpu hotpug
    init delay
  ACPI: processor: refactor acpi_processor_get_info: isolate
    acpi_{map|unmap}_cpu under CONFIG_ACPI_HOTPLUG_CPU
  ACPI: processor: refactor acpi_processor_remove: isolate
    acpi_unmap_cpu under CONFIG_ACPI_HOTPLUG_CPU

 drivers/acpi/acpi_processor.c | 138 ++++++++++++++++++++++------------
 1 file changed, 91 insertions(+), 47 deletions(-)

--
2.43.0