Re: [Qemu-devel] [RFC PATCH v2.1 00/12] Core based CPU hotplug for PowerPC sPAPR

[Igor Mammedov <imammedo@redhat.com>]

On Thu, 31 Mar 2016 14:09:09 +0530
Bharata B Rao <bharata@linux.vnet.ibm.com> wrote:

> Hi,
> 
> This is v2.1 of "Core based CPU hotplug for PowerPC sPAPR". v2 was
> posted here:
> https://lists.gnu.org/archive/html/qemu-ppc/2016-03/msg00201.html
> 
> I am making this v2.1 instead of v3 as this introduces a change in
> device_add semantics and if we don't want to continue this, I will go
> back to the previous v2 semantics from v3 onwards. v2 had
> spapr-cpu-core device that served as CPU core device for all types of
> PowerPCCPU threads. In this version however, spapr-cpu-core becomes
> an abstract device and we will have different core devices for each
> of the PowerPCCPU type. So in this version, the hotplug semantics
> looks like this:
> 
> (qemu) device_add POWER8-spapr-cpu-core,id=core2,core=16[,threads=4]
> 
> cpu_model specification is gone as it becomes redundant with different
> core types for each CPU type. CPU core types are defined only for
> host, POWER7 and POWER8 models only (and not for their
> variants/aliases) yet.
> 
> I have mostly taken care of all the review comments that I got for v2.
Could you rebase on top of current master, pls?

and fix compile error:
hw/cpu/core.c: In function ‘core_prop_set_core’:
hw/cpu/core.c:31:9: error: implicit declaration of function ‘error_propagate’ [-Werror=implicit-function-declaration]
         error_propagate(errp, local_err);

> 
> Major changes in this version (v2.1)
> ------------------------------------
> - Semantics change: spapr-cpu-core to POWER8-spapr-cpu-core and
> likewise
> - Included Igor's pre_plug patch.
> 
> Bharata B Rao (10):
>   exec: Remove cpu from cpus list during cpu_exec_exit()
>   exec: Do vmstate unregistration from cpu_exec_exit()
>   cpu: Add a sync version of cpu_remove()
>   cpu: Abstract CPU core type
>   spapr: Abstract CPU core device
>   spapr: Add CPU type specific core devices
>   spapr: convert boot CPUs into CPU core devices
>   spapr: CPU hotplug support
>   xics,xics_kvm: Handle CPU unplug correctly
>   spapr: CPU hot unplug support
> 
> Gu Zheng (1):
>   cpu: Reclaim vCPU objects
> 
> Igor Mammedov (1):
>   qdev: hotplug: Introduce HotplugHandler.pre_plug() callback
> 
>  cpus.c                          |  51 +++++-
>  exec.c                          |  41 ++++-
>  hw/core/hotplug.c               |  11 ++
>  hw/core/qdev.c                  |   9 +-
>  hw/cpu/Makefile.objs            |   1 +
>  hw/cpu/core.c                   |  87 ++++++++++
>  hw/intc/xics.c                  |  14 ++
>  hw/intc/xics_kvm.c              |   8 +-
>  hw/ppc/Makefile.objs            |   1 +
>  hw/ppc/spapr.c                  | 150 +++++++++++++++--
>  hw/ppc/spapr_cpu_core.c         | 349
> ++++++++++++++++++++++++++++++++++++++++
> hw/ppc/spapr_events.c           |   3 +
> hw/ppc/spapr_rtas.c             |  24 +++
> include/hw/cpu/core.h           |  31 ++++
> include/hw/hotplug.h            |  14 +-
> include/hw/ppc/spapr.h          |   6 +
> include/hw/ppc/spapr_cpu_core.h |  79 +++++++++
> include/hw/ppc/xics.h           |   1 +
> include/qom/cpu.h               |  18 +++
> include/sysemu/kvm.h            |   1 +
> kvm-all.c                       |  57 ++++++-
> kvm-stub.c                      |   5 + 22 files changed, 932
> insertions(+), 29 deletions(-) create mode 100644 hw/cpu/core.c
>  create mode 100644 hw/ppc/spapr_cpu_core.c
>  create mode 100644 include/hw/cpu/core.h
>  create mode 100644 include/hw/ppc/spapr_cpu_core.h
>