summaryrefslogtreecommitdiff
path: root/drivers/acpi/processor_idle.c
diff options
context:
space:
mode:
authorPeter Zijlstra <peterz@infradead.org>2023-01-12 22:43:26 +0300
committerIngo Molnar <mingo@kernel.org>2023-01-13 13:48:00 +0300
commit0c5ffc3d7b15978c6b184938cd6b8af06e436424 (patch)
tree48f3b3d321afa0c435ec1d83281cc28942923816 /drivers/acpi/processor_idle.c
parentc3d42418dca53d6c498a48c408f7a45289593650 (diff)
downloadlinux-0c5ffc3d7b15978c6b184938cd6b8af06e436424.tar.xz
cpuidle, dt: Push RCU-idle into driver
Doing RCU-idle outside the driver, only to then temporarily enable it again before going idle is suboptimal. Notably: this converts all dt_init_idle_driver() and __CPU_PM_CPU_IDLE_ENTER() users for they are inextrably intertwined. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/20230112195540.068981667@infradead.org
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 7bf882fcd64b..566f7dbf7ab3 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1219,6 +1219,8 @@ static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
state->target_residency = lpi->min_residency;
if (lpi->arch_flags)
state->flags |= CPUIDLE_FLAG_TIMER_STOP;
+ if (i != 0 && lpi->entry_method == ACPI_CSTATE_FFH)
+ state->flags |= CPUIDLE_FLAG_RCU_IDLE;
state->enter = acpi_idle_lpi_enter;
drv->safe_state_index = i;
}