Reviewed the patch-set and tested it on an ARM platform over the last couple of days without any issues, so Tested-by: Prashanth Prakash <pprakash@xxxxxxxxxxxxxx> Thanks, Prashanth On 12/2/2015 7:10 AM, Sudeep Holla 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. > > v2[2]->v3: > - rebased against v4.4-rc3 > - fixed couple of issues reported by Prashanth and review comments > from Ashwin > > v1[1]->v2[2]: > - Fixed support for ACPI0010 processor container > - moved sleep state code out of processor_idle > > Note the ARM64 specific changes are not part of this series as it's still > WIP and there are other consolidation happening in there. For reference > and testing, I have pushed a branch[3] > > Regards, > Sudeep > > [1] https://lkml.org/lkml/2015/8/4/789 > [2] https://lkml.org/lkml/2015/9/16/422 > [3] git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git arm64_lpi_testing > > > Sudeep Holla (5): > ACPI / processor : add support for ACPI0010 processor container > ACPI / sleep: move acpi_processor_sleep to sleep.c > ACPI / processor_idle: replace PREFIX with pr_fmt > ACPI / processor_idle : introduce ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE > ACPI / processor_idle: Add support for Low Power Idle(LPI) states > > arch/ia64/Kconfig | 1 + > arch/x86/Kconfig | 1 + > drivers/acpi/Kconfig | 6 + > drivers/acpi/acpi_processor.c | 17 ++ > drivers/acpi/bus.c | 8 +- > drivers/acpi/processor_driver.c | 4 +- > drivers/acpi/processor_idle.c | 553 ++++++++++++++++++++++++++++++++-------- > drivers/acpi/sleep.c | 35 +++ > include/acpi/processor.h | 42 ++- > include/linux/acpi.h | 4 + > 10 files changed, 545 insertions(+), 126 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
