diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-06-05 17:06:08 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-06-07 14:23:22 +0200 |
| commit | a430c11f401589a0f4f57fd398271a5d85142c7a (patch) | |
| tree | 51d884c37f79b4b882d3f6e04cb5f793ce598f3f | |
| parent | 4c529a4a7260776bb4abe264498857b4537aa70d (diff) | |
intel_idle: Rescan "dead" SMT siblings during initialization
Make intel_idle_init() call arch_cpu_rescan_dead_smt_siblings() after
successfully registering intel_idle as the cpuidle driver so as to
allow the "dead" SMT siblings (if any) to go into deep idle states.
This is necessary for the processor to be able to reach deep package
C-states (like PC10) going forward which is requisite for reducing
power sufficiently in suspend-to-idle, among other things.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Link: https://patch.msgid.link/10669885.nUPlyArG6x@rjwysocki.net
| -rw-r--r-- | drivers/idle/intel_idle.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 64ac4da08094..63565814c7e5 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -2507,6 +2507,8 @@ static int __init intel_idle_init(void) pr_debug("Local APIC timer is reliable in %s\n", boot_cpu_has(X86_FEATURE_ARAT) ? "all C-states" : "C1"); + arch_cpu_rescan_dead_smt_siblings(); + return 0; hp_setup_fail: |