v2: 1.remove PIIX4_PROC_BASE operations for cpu hotplug 2.fix wrong description fo cpu-del
patch 1 adds ACPI Embedded Controller (EC), refer-to: ACPI SPEC v5 chapter 12 "ACPI Embedded Controller Interface Specification" EC is a standard ACPI device, it plays flexible roles, especially be event carrier, it can pass events between platform and OS, so OS can execute _Qxx method which defined by yourself and query EC's ACPI space which can be a buffer for many purposes here, I want to deliver CPU online/offline event between OS and QEMU for CPU hotplug feature, then we will don't need to "echo 1 > /sys/devices/system/cpu/cpu1/online" again after 'cpu-add' and also for offline to do real cpu removal. what I am trying to do is emulated physical addition/removal (like described by linux kernel document for cpu hotplug -- linux-2.6/Documentation/cpu-hotplug.txt) for QEMU. these RFC patches are sent for demo what I am trying to do. the design process simply like following: hotplug qemu::ec::sci -> kernel::ec::gpe::notifier-> kernel::cpu_physic_hotplug::handler->kernel::cpu_up unplug kernel::cpu_down::kernel::cpu_physic_hotplug::handler-> kernel::ec::ec_write->qemu::ec::->qemu::cpu-unplug sorry, I should poll cpu-unplug cmd sent from kernel, but, it's a little trivial, I want do it later. for kernel patches: http://comments.gmane.org/gmane.linux.kernel/1503460 Li Guang (8) acpi: add ACPI Embedded Controller support ich9: add notifer for ec to generate sci ec: add operations for _Qxx events piix4: add notifer for ec to generate sci piix4: add events for cpu hotplug qmp: add 'cpu-del' command pc: add EC qdev init for piix & q35 cpu-hotplug: remove memory regison for cpu hotplug default-configs/x86_64-softmmu.mak | 1 + hw/acpi/Makefile.objs | 1 + hw/acpi/ec.c | 225 ++++++++++++++++++++++++++++++++++++ hw/acpi/ich9.c | 15 +++++++++++++++ hw/acpi/piix4.c | 68 ++++++++++++++ hw/i386/pc.c | 46 ++++++++++++++++++++++++++++-- hw/i386/pc_piix.c | 7 + hw/i386/pc_q35.c | 6 + include/hw/acpi/ec.h | 44 ++++++ include/hw/acpi/ich9.h | 1 + include/hw/boards.h | 5 +++-- include/hw/i386/pc.h | 1 + qapi-schema.json | 13 +++++++++++++ qmp-commands.hx | 23 +++++++++++++++++++++++ qmp.c | 9 +++++++++ 15 files changed, 411 insertions(+), 54 deletions(-) create mode 100644 hw/acpi/ec.c create mode 100644 include/hw/acpi/ec.h
