Via implementing ACPI standard methods _EJ0 in ACPI table, after Guest OS remove
one vCPU online, the fireware will store removed bitmap to QEMU, then QEMU could
know to notify the assigned vCPU of exiting. meanwhile, intruduce the QOM
command
'cpu-del' to remove vCPU from QEMU itself. currently, this patches only support
the cpu deleted sequentially from the last one, and command 'cpu-del' would
always
delete the last cpu every time. in libvirt, command 'virsh set-vcpus' always
add/delete
vcpu sequentially, so I think this patches will be OK.
this work is based on Andreas Färber's qom-next branch tree.
git://github.com/afaerber/qemu-next.git
this series patches must be used with KVM patch together.
for KVM patches:
http://comments.gmane.org/gmane.comp.emulators.kvm.devel/114347
v4-v5: delete command 'cpu-del' argument to remove cpu from the last one
rather than specify vcpuid and fix migration bug.
Chen Fan (8):
x86: move apic_state field from CPUX86State to X86CPU
x86: add x86_cpu_unrealizefn() for cpu apic remove
qmp: add 'cpu-del' command support
qom cpu: rename variable 'cpu_added_notifier' to
'cpu_hotplug_notifier'
qom cpu: add UNPLUG cpu notifier support
i386: implement pc interface cpu_common_unrealizefn() in qom/cpu.c
piix4: implement function cpu_status_write() for vcpu ejection
cpus: reclaim allocated vCPU objects
cpu-exec.c | 2 +-
cpus.c | 51 ++++++++++++++++++++++++++++--
hw/acpi/piix4.c | 66 ++++++++++++++++++++++++++++++++-------
hw/i386/acpi-dsdt-cpu-hotplug.dsl | 6 +++-
hw/i386/kvm/apic.c | 8 +++++
hw/i386/kvmvapic.c | 8 ++---
hw/i386/pc.c | 38 ++++++++++++++++------
hw/i386/pc_piix.c | 3 +-
hw/intc/apic.c | 10 ++++++
hw/intc/apic_common.c | 23 +++++++++++++-
hw/xen/xen_apic.c | 8 +++++
include/hw/boards.h | 2 ++
include/hw/cpu/icc_bus.h | 1 +
include/hw/i386/apic_internal.h | 1 +
include/hw/i386/pc.h | 1 +
include/qom/cpu.h | 21 +++++++++++++
include/sysemu/kvm.h | 1 +
include/sysemu/sysemu.h | 2 +-
kvm-all.c | 25 +++++++++++++++
qapi-schema.json | 10 ++++++
qmp-commands.hx | 21 +++++++++++++
qmp.c | 9 ++++++
qom/cpu.c | 26 ++++++++++++---
target-i386/cpu-qom.h | 5 +++
target-i386/cpu.c | 66 ++++++++++++++++++++++++++++++++-------
target-i386/cpu.h | 4 ---
target-i386/helper.c | 9 +++---
target-i386/kvm.c | 23 ++++++--------
target-i386/misc_helper.c | 8 ++---
29 files changed, 380 insertions(+), 78 deletions(-)
--
1.8.1.4
