[Qemu-devel] [RFC PATCH v0 0/3] sPAPR: Memory hot removal support

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

This patchset enables memory hot unplug for PowerPC sPAPR guests.
This applies against spapr-next branch of David Gibson's tree that
currently contains the memory hotplug code for sPAPR.

Currently with drmgr, it is not possible to attempt just the removal
of those LMBs that form the DIMM device when the DIMM device is removed.
drmgr just walks through all the available 'removable' LMBs and tries
to off-line the specified number of LMBs. Because of this, I have
introduced some additional checks in QEMU to fail the removal request of an
LMB that doesn't belong to the DIMM device which is being unplugged.
This causes some churn in the guest when the LMB that didn't belong to
the DIMM device was offlined and later brought online again by drmgr
when QEMU fails the release of the corresponding DRC object.

Bharata B Rao (3):
  pc-dimm: Add a field to PCDIMMDevice to mark device deletion state
  spapr-rtas: Enable rtas_set_indicator() to return correct error
  spapr: Memory hot-unplug support

 hw/ppc/spapr.c           | 114 ++++++++++++++++++++++++++++++++++++++++++++++-
 hw/ppc/spapr_drc.c       |  21 +++++++++
 hw/ppc/spapr_rtas.c      |   9 ++--
 include/hw/mem/pc-dimm.h |   1 +
 include/hw/ppc/spapr.h   |   2 +
 5 files changed, 142 insertions(+), 5 deletions(-)

-- 
2.1.0