This series is based on David's ppc-for-2.8 branch, and is also available from:
https://github.com/mdroth/qemu/commits/spapr-hotplug-event-update Patches 1-4 address various deficiencies in how we currently handle option vectors via ibm,client-architecture-support. This is done here in preparation for a new option vector bit introduced later in this series, as well as a number of future option vector bits related to other features, but I can break this out into a separate series if preferred. Patches 5-8 add support for an updated event format for hotplug events, which includes a new way to specify a range of DRCs/LMBs to hotplug/unplug using a starting position and count, which is necessary for memory unplug. The format for this new event format is still in draft form, but slated for inclusion in the PAPR/LoPAPR. Patches 9-11 add support for memory unplug using the new event format. In addition to kernel 4.8 or later, there are a number of patches required to enable support on the guest kernel side. I've including the minimum set of patches in my branch here: https://github.com/mdroth/linux/commits/spapr-hotplug-event-update *powerpc/pseries: advertise Hot Plug Event support to firmware powerpc/pseries: Implement indexed-count hotplug memory remove powerpc/pseries: Implement indexed-count hotplug memory add Note that there is currently an issue that arises when attempting to offline an LMB that was onlined using a guest kernel's auto-onlining mechanism, which can prevent full completion of memory unplug requests. This is being investigated, but for the purposes of testing this can be worked around currently by disabling auto-onlining in guests via: "echo offline >/sys/devices/system/memory/auto_online_blocks" and instead onlining the blocks manually or via udev. docs/specs/ppc-spapr-hotplug.txt | 55 ++++++++++--- hw/ppc/Makefile.objs | 2 +- hw/ppc/spapr.c | 237 ++++++++++++++++++++++++++++++++++++++++++++++++------ hw/ppc/spapr_drc.c | 17 ++++ hw/ppc/spapr_events.c | 222 ++++++++++++++++++++++++++++++++++++++++----------- hw/ppc/spapr_hcall.c | 70 +++++++--------- hw/ppc/spapr_ovec.c | 244 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/hw/ppc/spapr.h | 15 +++- include/hw/ppc/spapr_ovec.h | 67 ++++++++++++++++ 9 files changed, 804 insertions(+), 125 deletions(-)
