[Qemu-devel] [RFC 0/6] enable numa configuration before machine_init() from HMP/QMP

[Igor Mammedov]

Series allows to configure NUMA mapping at runtime using QMP/HMP
interface. For that to happen it introduces a new '-paused' CLI option
which allows to pause QEMU before machine_init() is run and
adds new set-numa-node HMP/QMP commands which in conjuction with
info hotpluggable-cpus/query-hotpluggable-cpus allow to configure
NUMA mapping for cpus.

HMP configuration session for CLI '-smp 1,maxcpus=2' would look like:

(qemu) info hotpluggable-cpus 
Hotpluggable CPUs:
  type: "qemu64-x86_64-cpu"
  vcpus_count: "1"
  CPUInstance Properties:
    socket-id: "1"
    core-id: "0"
    thread-id: "0"
  type: "qemu64-x86_64-cpu"
  vcpus_count: "1"
  qom_path: "/machine/unattached/device[0]"
  CPUInstance Properties:
    socket-id: "0"
    core-id: "0"
    thread-id: "0"
(qemu) set-numa-node node,nodeid=0
(qemu) set-numa-node node,nodeid=1
(qemu) set-numa-node cpu,socket-id=0,node-id=0
(qemu) set-numa-node cpu,socket-id=1,node-id=1
(qemu) info hotpluggable-cpus 
Hotpluggable CPUs:
  type: "qemu64-x86_64-cpu"
  vcpus_count: "1"
  CPUInstance Properties:
    node-id: "1"
    socket-id: "1"
    core-id: "0"
    thread-id: "0"
  type: "qemu64-x86_64-cpu"
  vcpus_count: "1"
  CPUInstance Properties:
    node-id: "0"
    socket-id: "0"
    core-id: "0"
    thread-id: "0"
(qemu) cont

git tree for testing:
  https://github.com/imammedo/qemu qmp_preconfig_rfc


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Igor Mammedov (6):
  numa: postpone options post-processing till machine_run_board_init()
  numa: split out NumaOptions parsing into parse_NumaOptions()
  possible_cpus: add CPUArchId::type field
  CLI: add -paused option
  HMP: add set-numa-node command
  QMP: add set-numa-node command

 hmp.h                      |  1 +
 include/hw/boards.h        |  2 ++
 include/sysemu/numa.h      |  2 ++
 include/sysemu/sysemu.h    |  1 +
 hmp-commands.hx            | 13 ++++++++
 hmp.c                      | 23 ++++++++++++++
 hw/arm/virt.c              |  3 +-
 hw/core/machine.c          | 18 ++++++-----
 hw/i386/pc.c               |  4 ++-
 hw/ppc/spapr.c             | 13 +++++---
 hw/s390x/s390-virtio-ccw.c |  1 +
 numa.c                     | 79 ++++++++++++++++++++++++++++++++++------------
 qapi-schema.json           | 13 ++++++++
 qemu-options.hx            | 15 +++++++++
 qmp.c                      |  5 +++
 vl.c                       | 54 ++++++++++++++++++++++++++++++-
 16 files changed, 210 insertions(+), 37 deletions(-)

-- 
2.7.4