On 06/25/2013 03:23 AM, Joseph Lo wrote: > This series introduce CPU core power down state for CPU idle. When CPU go > into this state, it saves it's context and needs a proper configuration > in flow controller to power gate the CPU when CPU runs into WFI > instruction. And the CPU also needs to set the IRQ as CPU power down idle > wake up event in flow controller. > > To prevent race conditions and ensure proper interrupt routing on > Cortex-A15 CPUs when they are power-gated, add a CPU PM notifier > call-back to reprogram the GIC CPU interface on PM entry. The > GIC CPU interface will be reset back to its normal state by > the common GIC CPU PM exit callback when the CPU wakes up. > > This series depends on the patch of "tick: Fix > tick_broadcast_pending_mask not cleared". Joseph, I applied all 3 of your patches/series on top of next-20130701, which does include dependency "tick: Fix tick_broadcast_pending_mask not cleared": * ARM: tegra: cpuidle: use CPUIDLE_FLAG_TIMER_STOP flag * This series * ARM: tegra114: add support for system suspend I find that at least on on Tegra114/Dalmore, CPU hotplug doesn't work correctly. If I unplug CPU0, I get an immediate system hang: root@localhost:~# ./cpuonline.py echo 0 > /sys/devices/system/cpu/cpu0/online [ 73.555696] IRQ73 no longer affine to CPU0 [ 73.561965] CPU0: shutdown If I adjust my script not to hotplug CPU0, I get a hang when plugging a CPU back in: root@localhost:~# ./cpuonline.py echo 0 > /sys/devices/system/cpu/cpu2/online [ 87.141128] CPU2: shutdown echo 0 > /sys/devices/system/cpu/cpu1/online [ 89.227597] CPU1: shutdown echo 0 > /sys/devices/system/cpu/cpu3/online [ 91.253870] CPU3: shutdown echo 1 > /sys/devices/system/cpu/cpu1/online or simpler: root@localhost:~# echo 0 > /sys/devices/system/cpu/cpu1/online [ 80.767825] CPU1: shutdown root@localhost:~# echo 1 > /sys/devices/system/cpu/cpu1/online Finally, if I boot afresh and enter system suspend, I see the system suspend OK, but pressing the power button on either the board itself or the attached PM342 debug board will not wake the system from sleep. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
