kernel.git/arch/arm64/kernel/cpuidle.c, branch linux-6.7.y

arm64: Explicitly include correct DT includes

2023-07-31T13:45:38Z

Remove unused 'of*.h' header inclusions from the arm64 arch code to allow for the eventual untangling of 'of_device.h and 'of_platform.h', which currently include each other. Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20230714174021.4039807-1-robh@kernel.org Signed-off-by: Will Deacon

arm64: cpuidle: fix #ifdef for acpi functions

2023-05-25T16:44:02Z

The acpi_processor_ffh_lpi_* functions are defined whenever CONFIG_ACPI is enabled, but only called and declared when CONFIG_ACPI_PROCESSOR_IDLE is also enabled. Without that, a W=1 build triggers missing-prototope warnings, so the #ifdef needs to be adapted: arch/arm64/kernel/cpuidle.c:60:5: error: no previous prototype for 'acpi_processor_ffh_lpi_probe' [-Werror=missing-prototypes] arch/arm64/kernel/cpuidle.c:65:15: error: no previous prototype for 'acpi_processor_ffh_lpi_enter' [-Werror=missing-prototypes] Signed-off-by: Arnd Bergmann Reviewed-by: Kees Cook Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20230516160642.523862-8-arnd@kernel.org Signed-off-by: Catalin Marinas

cpuidle, arm64: Fix the ARM64 cpuidle logic

2023-01-18T11:27:17Z

The recent cpuidle changes started triggering RCU splats on Juno development boards: | ============================= | WARNING: suspicious RCU usage | ----------------------------- | include/trace/events/ipi.h:19 suspicious rcu_dereference_check() usage! Fix cpuidle on ARM64: - ... by introducing a new 'is_rcu' flag to the cpuidle helpers & make ARM64 use it, as ARM64 wants to keep RCU active longer and wants to do the ct_cpuidle_enter()/exit() dance itself. - Also update the PSCI driver accordingly. - This also removes the last known RCU_NONIDLE() user as a bonus. Reported-by: Mark Rutland Signed-off-by: Peter Zijlstra Signed-off-by: Ingo Molnar Tested-by: Sudeep Holla Tested-by: Mark Rutland Reviewed-by: Mark Rutland Link: https://lore.kernel.org/r/Y8Z31UbzG3LJgAXE@hirez.programming.kicks-ass.net --

cpuidle, arch: Mark all ct_cpuidle_enter() callers __cpuidle

2023-01-13T10:48:17Z

For all cpuidle drivers that use CPUIDLE_FLAG_RCU_IDLE, ensure that all functions that call ct_cpuidle_enter() are marked __cpuidle. ( due to lack of noinstr validation on these platforms it is entirely possible this isn't complete ) Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20230112195542.274096325@infradead.org

arm64: cpuidle: remove generic cpuidle support

2022-06-23T13:19:33Z

The arm64 support of the generic ARM cpuidle driver was removed. This let us remove all support code for it. Signed-off-by: Michael Walle Reviewed-by: Sudeep Holla Acked-by: Daniel Lezcano Link: https://lore.kernel.org/r/20220529181329.2345722-3-michael@walle.cc Signed-off-by: Will Deacon

cpuidle: PSCI: Move the `has_lpi` check to the beginning of the function

2022-03-03T19:20:06Z

Currently the first thing checked is whether the PCSI cpu_suspend function has been initialized. Another change will be overloading `acpi_processor_ffh_lpi_probe` and calling it sooner. So make the `has_lpi` check the first thing checked to prepare for that change. Reviewed-by: Sudeep Holla Signed-off-by: Mario Limonciello Signed-off-by: Rafael J. Wysocki

arm64: kernel: Update the stale comment

2021-05-06T11:26:26Z

Commit af391b15f7b5 ("arm64: kernel: rename __cpu_suspend to keep it aligned with arm") has used @index instead of @arg, but the comment is stale, update it. Cc: Sudeep Holla Cc: Will Deacon Signed-off-by: Shaokun Zhang Reviewed-by: Sudeep Holla Link: https://lore.kernel.org/r/1620280462-21937-1-git-send-email-zhangshaokun@hisilicon.com Signed-off-by: Catalin Marinas

arm64: Introduce get_cpu_ops() helper function

2020-03-24T17:24:19Z

This introduces get_cpu_ops() to return the CPU operations according to the given CPU index. For now, it simply returns the @cpu_ops[cpu] as before. Also, helper function __cpu_try_die() is introduced to be shared by cpu_die() and ipi_cpu_crash_stop(). So it shouldn't introduce any functional changes. Signed-off-by: Gavin Shan Signed-off-by: Catalin Marinas Acked-by: Mark Rutland

PSCI: cpuidle: Refactor CPU suspend power_state parameter handling

2019-08-09T16:51:39Z

Current PSCI code handles idle state entry through the psci_cpu_suspend_enter() API, that takes an idle state index as a parameter and convert the index into a previously initialized power_state parameter before calling the PSCI.CPU_SUSPEND() with it. This is unwieldly, since it forces the PSCI firmware layer to keep track of power_state parameter for every idle state so that the index->power_state conversion can be made in the PSCI firmware layer instead of the CPUidle driver implementations. Move the power_state handling out of drivers/firmware/psci into the respective ACPI/DT PSCI CPUidle backends and convert the psci_cpu_suspend_enter() API to get the power_state parameter as input, which makes it closer to its firmware interface PSCI.CPU_SUSPEND() API. A notable side effect is that the PSCI ACPI/DT CPUidle backends now can directly handle (and if needed update) power_state parameters before handing them over to the PSCI firmware interface to trigger PSCI.CPU_SUSPEND() calls. Signed-off-by: Lorenzo Pieralisi Acked-by: Daniel Lezcano Reviewed-by: Ulf Hansson Reviewed-by: Sudeep Holla Cc: Will Deacon Cc: Ulf Hansson Cc: Sudeep Holla Cc: Daniel Lezcano Cc: Catalin Marinas Cc: Mark Rutland Cc: "Rafael J. Wysocki" Signed-off-by: Will Deacon

ARM: psci: cpuidle: Enable PSCI CPUidle driver

2019-08-09T16:51:39Z

Allow selection of the PSCI CPUidle in the kernel by updating the respective Kconfig entry. Remove PSCI callbacks from ARM/ARM64 generic CPU ops to prevent the PSCI idle driver from clashing with the generic ARM CPUidle driver initialization, that relies on CPU ops to initialize and enter idle states. Signed-off-by: Lorenzo Pieralisi Reviewed-by: Ulf Hansson Cc: Will Deacon Cc: Ulf Hansson Cc: Sudeep Holla Cc: Daniel Lezcano Cc: Catalin Marinas Cc: Mark Rutland Cc: "Rafael J. Wysocki" Signed-off-by: Will Deacon