This patch set adds saving and restoring the GIC on v3 implementations through a devicetree flag.
The new CPU_PM state was the cleanest way to synchronize the save and restore (that I figured out) with other PM operations since this isn't going into any PSCI implementations (at least not in ARM-Trusted-Firmware). I've verified these patches on a Rockchip RK3399 platform (some devicetree changes needed). This included turning off the power rail for the GIC during suspend. Derek Basehore (8): cpu_pm: add syscore_suspend error handling lib/iomap_copy: add __ioread64_copy() cpu_pm: Add SYSTEM_PM state irqchip/gic-v3: add ability to save/restore GIC/ITS state DT/arm,gic-v3: add save-suspend-state property irqchip/gic-v3-its: add ability to resend MAPC on resume DT/arm,gic-v3: add resend-mapc-on-resume property irqchip/gic-v3: add power down/up sequence .../bindings/interrupt-controller/arm,gic-v3.txt | 43 +++ drivers/irqchip/irq-gic-v3-its.c | 136 +++++-- drivers/irqchip/irq-gic-v3.c | 391 ++++++++++++++++++++- include/linux/cpu_pm.h | 14 + include/linux/io.h | 1 + include/linux/irqchip/arm-gic-v3.h | 26 ++ kernel/cpu_pm.c | 75 ++-- lib/iomap_copy.c | 26 ++ 8 files changed, 640 insertions(+), 72 deletions(-) -- 2.16.0.rc1.238.g530d649a79-goog
