[Qemu-devel] [RFC PATCH v0 00/15] CPU hotplug support of PowerPC sPAPR guests

[Bharata B Rao]

Hi,

This is an early RFC patchset that adds CPU hotplug support for sPAPR guests.
The patchset applies on top of spapr-pci-hotplug-ppc-next-cleanup4 branch
of Michael Roth's tree (git://github.com/mdroth/qemu). I realize that Michael's
branch is a fast moving target and is under review now, but my patchset
depends on the hotplug framework that Michael is adding.

The division of the patches might look artificial at places, that's because
I have tried to separate the cleanup vs the actual changes I am adding. Also
there are a few fixes (like endianness fixes) that probably could be part
of Michael's patchset itself.

With the current patchset, I am able to hotplug CPUs to a BE guest successfully.
There are issues with LE guest which I still need to resolve. The hotplug
semantics (adding CPU vs adding core) hasn't yet been finalized and I have
described this issue in the patch 15/15. Also this needs a few endian
fixes to PowerPC kernel (in the CPU hotplug code path), which I will be
posting later separately.

Bharata B Rao (15):
  ppc: Store dr entity state bits at the right bit offset
  ppc: Rename SPAPR_DRC_TABLE_SIZE to SPAPR_DRC_PHB_TABLE_SIZE
  ppc: Rename sPAPRDrcEntry.phb_buid to sPAPRDrcEntry.id
  ppc: Make creation of DRC entries in FDT endian safe
  ppc: Accommodate CPU DRC entries in DRC table
  ppc: stop after getting first unused DR slot in DRC table
  ppc: Initialize DRC table before initializing CPUs
  ppc: Add CPU dynamic reconfiguration (DR) support
  ppc: Consider max_cpus during xics initialization
  ppc: Factor out CPU initialization code to a new routine
  ppc: Move RTAS indicator defines to a header file
  ppc: Support ibm,lrdr-capacity device tree property
  ppc: Make ibm,configure-connector endian-safe
  ppc: Add CPU hotplug support for sPAPR guests
  ppc: Allow hotplugging of CPU cores only

 hw/ppc/spapr.c              | 550 +++++++++++++++++++++++++++++++++++++++-----
 hw/ppc/spapr_events.c       |  35 ++-
 hw/ppc/spapr_pci.c          |  40 +---
 hw/ppc/spapr_rtas.c         |  28 ++-
 include/hw/ppc/spapr.h      |  55 ++++-
 target-ppc/translate_init.c |   5 +
 6 files changed, 603 insertions(+), 110 deletions(-)

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1.7.11.7