Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1438939

Re: [PATCH v8 0/6] ACPI / processor_idle: Add ACPI v6.0 LPI support

Show all headers | View raw

On Thu, Jul 7, 2016 at 7:10 PM, Sudeep Holla <sudeep.holla@arm.com> wrote:
> ACPI 6.0 introduced LPI(Low Power Idle) states that provides an alternate
> method to describe processor idle states. It extends the specification
> to allow the expression of idle states like C-states selectable by the
> OSPM when a processor goes idle, but may affect more than one processor,
> and may affect other system components.
>
> LPI extensions leverages the processor container device(again introduced
> in ACPI 6.0) allowing to express which parts of the system are affected
> by a given LPI state. It defines the local power states for each node
> in a hierarchical processor topology. The OSPM can use _LPI object to
> select a local power state for each level of processor hierarchy in the
> system. They used to produce a composite power state request that is
> presented to the platform by the OSPM.
>
> Since multiple processors affect the idle state for any non-leaf hierarchy
> node, coordination of idle state requests between the processors is
> required. ACPI supports two different coordination schemes: Platform
> coordinated and  OS initiated.
>
> This series aims at providing basic and initial support for platform
> coordinated LPI states.
>
> v7[7]->v8:
>         - Replaced HAVE_GENERIC_CPUIDLE_ENTER with CPU_IDLE_ENTER_WRAPPED
>           macro, which is more cleaner and definately less confusing :)
>           (Thanks to Rafael for the suggestion)

Patches [3-6/6] definitely look a lot cleaner to me now. :-)

That said, the name of the macro I suggested was just an example, so
if people don't like this one, it'd be fine to change it as far as I'm
concerned.

Thanks,
Rafael

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v8 0/6] ACPI / processor_idle: Add ACPI v6.0 LPI support Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
  [PATCH v8 1/6] ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
    [PATCH v8 3/6] arm64: cpuidle: drop __init section marker to arm_cpuidle_init Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
      [PATCH v8 4/6] cpuidle: introduce CPU_IDLE_ENTER_WRAPPED macro for ARM{32,64} Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
        [PATCH v8 5/6] arm64: add support for ACPI Low Power Idle(LPI) Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
          [PATCH v8 6/6] ACPI : enable ACPI_PROCESSOR_IDLE on ARM64 Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
          Re: [PATCH v8 5/6] arm64: add support for ACPI Low Power Idle(LPI) Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-07-08 16:50 +0200
            Re: [PATCH v8 5/6] arm64: add support for ACPI Low Power Idle(LPI) Sudeep Holla <sudeep.holla@arm.com> - 2016-07-08 17:30 +0200
    [PATCH v8 2/6] ACPI / processor_idle: Add support for Low Power Idle(LPI) states Sudeep Holla <sudeep.holla@arm.com> - 2016-07-07 19:20 +0200
  Re: [PATCH v8 0/6] ACPI / processor_idle: Add ACPI v6.0 LPI support "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-07 23:10 +0200
    Re: [PATCH v8 0/6] ACPI / processor_idle: Add ACPI v6.0 LPI support Sudeep Holla <sudeep.holla@arm.com> - 2016-07-08 13:10 +0200
      Re: [PATCH v8 0/6] ACPI / processor_idle: Add ACPI v6.0 LPI support Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> - 2016-07-08 16:50 +0200
        Re: [PATCH v8 0/6] ACPI / processor_idle: Add ACPI v6.0 LPI support Sudeep Holla <sudeep.holla@arm.com> - 2016-07-08 17:30 +0200

csiph-web