Merge tag 'pmdomain-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm

Pull pmdomain updates from Ulf Hansson:
 "pmdomain core:
   - Allow power-off for out-of-band wakeup-capable devices
   - Drop the redundant call to dev_pm_domain_detach() for the amba bus
   - Extend the genpd governor for CPUs to account for IPIs

  pmdomain providers:
   - bcm: Add support for BCM2712
   - mediatek: Add support for MFlexGraphics power domains
   - mediatek: Add support for MT8196 power domains
   - qcom: Add RPMh power domain support for Kaanapali
   - rockchip: Add support for RV1126B

  pmdomain consumers:
   - usb: dwc3: Enable out of band wakeup for i.MX95
   - usb: chipidea: Enable out of band wakeup for i.MX95"

* tag 'pmdomain-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm: (26 commits)
  pmdomain: Extend the genpd governor for CPUs to account for IPIs
  smp: Introduce a helper function to check for pending IPIs
  pmdomain: mediatek: convert from clk round_rate() to determine_rate()
  amba: bus: Drop dev_pm_domain_detach() call
  pmdomain: bcm: bcm2835-power: Prepare to support BCM2712
  pmdomain: mediatek: mtk-mfg: select MAILBOX in Kconfig
  pmdomain: mediatek: Add support for MFlexGraphics
  pmdomain: mediatek: Fix build-errors
  cpuidle: psci: Replace deprecated strcpy in psci_idle_init_cpu
  pmdomain: rockchip: Add support for RV1126B
  pmdomain: mediatek: Add support for MT8196 HFRPSYS power domains
  pmdomain: mediatek: Add support for MT8196 SCPSYS power domains
  pmdomain: mediatek: Add support for secure HWCCF infra power on
  pmdomain: mediatek: Add support for Hardware Voter power domains
  pmdomain: qcom: rpmhpd: Add RPMh power domain support for Kaanapali
  usb: dwc3: imx8mp: Set out of band wakeup for i.MX95
  usb: chipidea: ci_hdrc_imx: Set out of band wakeup for i.MX95
  usb: chipidea: core: detach power domain for ci_hdrc platform device
  pmdomain: core: Allow power-off for out-of-band wakeup-capable devices
  PM: wakeup: Add out-of-band system wakeup support for devices
  ...

1 files changed, 22 insertions, 0 deletions

diff --git a/kernel/smp.c b/kernel/smp.c
index 02f52291fae4..f349960f79ca 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -1088,6 +1088,28 @@ void wake_up_all_idle_cpus(void)
 EXPORT_SYMBOL_GPL(wake_up_all_idle_cpus);
 
 /**
+ * cpus_peek_for_pending_ipi - Check for pending IPI for CPUs
+ * @mask: The CPU mask for the CPUs to check.
+ *
+ * This function walks through the @mask to check if there are any pending IPIs
+ * scheduled, for any of the CPUs in the @mask. It does not guarantee
+ * correctness as it only provides a racy snapshot.
+ *
+ * Returns true if there is a pending IPI scheduled and false otherwise.
+ */
+bool cpus_peek_for_pending_ipi(const struct cpumask *mask)
+{
+	unsigned int cpu;
+
+	for_each_cpu(cpu, mask) {
+		if (!llist_empty(per_cpu_ptr(&call_single_queue, cpu)))
+			return true;
+	}
+
+	return false;
+}
+
+/**
  * struct smp_call_on_cpu_struct - Call a function on a specific CPU
  * @work: &work_struct
  * @done: &completion to signal