diff options
| author |   Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com> | 2025-02-05 17:52:10 +0200 |
|---|---|---|
| committer |   Dave Hansen <dave.hansen@linux.intel.com> | 2025-02-05 10:44:52 -0800 |
| commit | fc4ca9537bc4e3141ba7e058700369ea242703df (patch) | |
| tree | 8d6181ec97ba0924c459eb65a4f63950d39d69ce | |
| parent | ACPI/processor_idle: Add FFH state handling (diff) | |
| download | wireguard-linux-fc4ca9537bc4e3141ba7e058700369ea242703df.tar.xz wireguard-linux-fc4ca9537bc4e3141ba7e058700369ea242703df.zip | |
intel_idle: Provide the default enter_dead() handler
Recent Intel platforms require idle driver to provide information about
the MWAIT hint used to enter the deepest idle state in the play_dead
code.
Provide the default enter_dead() handler for all of the platforms and
allow overwriting with a custom handler for each platform if needed.
Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/all/20250205155211.329780-4-artem.bityutskiy%40linux.intel.com
| -rw-r--r-- | drivers/idle/intel_idle.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 118fe1d37c22..e59073efb6fa 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -57,6 +57,7 @@ #include <asm/mwait.h> #include <asm/spec-ctrl.h> #include <asm/fpu/api.h> +#include <asm/smp.h> #define INTEL_IDLE_VERSION "0.5.1" @@ -228,6 +229,15 @@ static __cpuidle int intel_idle_s2idle(struct cpuidle_device *dev, return 0; } +static void intel_idle_enter_dead(struct cpuidle_device *dev, int index) +{ + struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev); + struct cpuidle_state *state = &drv->states[index]; + unsigned long eax = flg2MWAIT(state->flags); + + mwait_play_dead(eax); +} + /* * States are indexed by the cstate number, * which is also the index into the MWAIT hint array. @@ -1800,6 +1810,7 @@ static void __init intel_idle_init_cstates_acpi(struct cpuidle_driver *drv) state->flags |= CPUIDLE_FLAG_TIMER_STOP; state->enter = intel_idle; + state->enter_dead = intel_idle_enter_dead; state->enter_s2idle = intel_idle_s2idle; } } @@ -2149,6 +2160,9 @@ static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv) !cpuidle_state_table[cstate].enter_s2idle) break; + if (!cpuidle_state_table[cstate].enter_dead) + cpuidle_state_table[cstate].enter_dead = intel_idle_enter_dead; + /* If marked as unusable, skip this state. */ if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_UNUSABLE) { pr_debug("state %s is disabled\n", |