[Qemu-devel] [RFC PATCH v4 00/11] sPAPR CPU hotplug

[Bharata B Rao <bharata@linux.vnet.ibm.com>]

Hi,

This is the next version of CPU hotplug support patchset for PowerPC
sPAPR guests. This is a split-out from the previous version (v3) that
was carrying CPU and memory hotplug together. This patchset applies on
spapr-next branch of David Gibson's tree.

In the previous version, I was doing CPU addition at socket granularity.
One hotplug request would add one complete CPU socket with all the cores
and threads as per the boot time topology specification. Based on the
feedback for v3, I am switching back to earlier method wherein I don't
have the notion of socket device. In this version I don't create any
additional device abstraction over CPU device, but use the existing
CPU device and add full cores at once. One hotplug request will add
a complete core with all the underlying threads.

I have enabled device_add based hotplug for POWER8 family for processors
and currently the semantics looks like this:

(qemu) device_add POWER8-powerpc64-cpu,id=cpu8

v3: https://lists.nongnu.org/archive/html/qemu-devel/2015-04/msg02910.html

Bharata B Rao (10):
  exec: Remove cpu from cpus list during cpu_exec_exit()
  exec: Do vmstate unregistration from cpu_exec_exit()
  cpus: Add a sync version of cpu_remove()
  xics_kvm: Add cpu_destroy method to XICS
  spapr: Create pseries-2.5 machine
  spapr: Enable CPU hotplug for pseries-2.5 and add CPU DRC DT entries
  spapr: CPU hotplug support
  spapr: Support topologies with unfilled cores
  spapr: CPU hot unplug support
  target-ppc: Enable CPU hotplug for POWER8 CPU family

Gu Zheng (1):
  cpus: Reclaim vCPU objects

 cpus.c                      |  55 ++++++++
 exec.c                      |  30 +++++
 hw/intc/xics.c              |  12 ++
 hw/intc/xics_kvm.c          |   9 ++
 hw/ppc/spapr.c              | 300 +++++++++++++++++++++++++++++++++++++++++++-
 hw/ppc/spapr_events.c       |   3 +
 hw/ppc/spapr_rtas.c         |  11 ++
 include/hw/ppc/spapr.h      |   1 +
 include/hw/ppc/xics.h       |   2 +
 include/qom/cpu.h           |  19 +++
 include/sysemu/kvm.h        |   1 +
 kvm-all.c                   |  57 ++++++++-
 kvm-stub.c                  |   5 +
 target-ppc/translate_init.c |  10 ++
 14 files changed, 511 insertions(+), 4 deletions(-)

-- 
2.1.0