[Qemu-devel] [PATCH v5 00/22] s390x cleanups and CPU hotplug via device_add

[David Hildenbrand]

The first patches are a bunch of cleanups. I decided to go the
extra mile and implement CPU hotplug via "device_add", as well as
"query-hotpluggable-cpus".

On s390x, only complete cores can be plugged. CPU hot unplug is currently
not supported by the architecture.

Support for hotplugging CPUs in random core-id order (last two patches)
is added. We once hat a KVM bug preventing this, but the stable patch
should now be included in relevant places - 152e9f65d66f ("KVM: s390: fix
wrong lookup of VCPUs by array index"). Current tooling will plug them in
sequential order anyway, so it should not hurt.


v4 -> v5:
* Only moving code around, no conceptual changes.
* "s390x: allow only 1 CPU with TCG"
 - Drop the ifdef stuff again.
* "s390x: implement query-hotpluggable-cpus"
 - Don't move s390_cpu_addr2state(), we can clean that up later.
 - Moved dropping "cpu_states" to next patch.
 - Drop s390_find_cpu_slot().
* "s390x: get rid of cpu_states and use possible_cpus instead"
 - Added as requested by Igor.


David Hildenbrand (22):
  exec,dump,i386,ppc,s390x: don't include exec/cpu-all.h explicitly
  cpu: drop old comments describing members
  s390x: get rid of s390-virtio.c
  s390x: rename s390-virtio.h to s390-virtio-hcall.h
  s390x: move s390_virtio_hypercall() to s390-virtio-hcall.h
  s390x: move subsystem_reset() to s390-virtio-ccw.h
  target/s390x: move some s390x typedefs to cpu-qom.h
  s390x: move sclp_service_call() to sclp.h
  target/s390x: use trigger_pgm_exception() in
    s390_cpu_handle_mmu_fault()
  target/s390x: use program_interrupt() in per_check_exception()
  s390x: allow only 1 CPU with TCG
  target/s390x: set cpu->id for linux user when realizing
  target/s390x: use "core-id" for cpu number/address/id handling
  target/s390x: rename next_cpu_id to next_core_id
  s390x: print CPU definitions in sorted order
  s390x: allow cpu hotplug via device_add
  s390x: CPU hot unplug via device_del cannot work for now
  s390x: implement query-hotpluggable-cpus
  s390x: get rid of cpu_states and use possible_cpus instead
  s390x: get rid of cpu_s390x_create()
  s390x: generate sclp cpu information from possible_cpus
  s390x: allow CPU hotplug in random core-id order

 dump.c                             |   1 -
 exec.c                             |   1 -
 hw/s390x/Makefile.objs             |   1 -
 hw/s390x/s390-virtio-ccw.c         | 239 +++++++++++++++++++++++++++++++++++--
 hw/s390x/s390-virtio-hcall.c       |   2 +-
 hw/s390x/s390-virtio-hcall.h       |  21 ++++
 hw/s390x/s390-virtio.c             |  37 ------
 hw/s390x/s390-virtio.h             |  35 ------
 hw/s390x/sclp.c                    |  34 +++---
 include/hw/s390x/s390-virtio-ccw.h |   2 +
 include/hw/s390x/sclp.h            |   2 +
 include/qom/cpu.h                  |   6 +-
 qapi-schema.json                   |  16 +++
 target/i386/arch_dump.c            |   1 -
 target/i386/arch_memory_mapping.c  |   1 -
 target/i386/svm_helper.c           |   1 -
 target/ppc/arch_dump.c             |   1 -
 target/s390x/arch_dump.c           |   1 -
 target/s390x/cpu-qom.h             |   7 +-
 target/s390x/cpu.c                 |  85 ++++---------
 target/s390x/cpu.h                 |  13 +-
 target/s390x/cpu_models.c          |  58 ++++++---
 target/s390x/cpu_models.h          |   8 +-
 target/s390x/diag.c                |   1 +
 target/s390x/excp_helper.c         |   5 +-
 target/s390x/helper.c              |  47 +-------
 target/s390x/internal.h            |   1 -
 target/s390x/kvm.c                 |   1 +
 target/s390x/misc_helper.c         |  21 ++--
 target/s390x/translate.c           |   5 +-
 30 files changed, 388 insertions(+), 266 deletions(-)
 create mode 100644 hw/s390x/s390-virtio-hcall.h
 delete mode 100644 hw/s390x/s390-virtio.h

-- 
2.13.5