On 29/04/2015 21:20, Michael Roth wrote: > These patches are based on latest spapr-hotplug-pci patches, and > can also be obtained from: > > https://github.com/mdroth/qemu/commits/spapr-hotplug-phb > > These patches implement support for hotplug/unplug of PCI host-bridges. > The main use cases are: > > - allowing for VFIO PCI hotplug for host kernels that still require a > 1:1 mapping between guest PHB/TCE table and an iommu group (a > requirement that will be relaxed with Alexey Kardashevskiy's VFIO > rework for DDW support) > - allocating new PHBs/TCE tables for hotplugging/distributing VFIO > devices that have different NUMA affinities associated with them > for performance reason > - expanding hotplug capacity for passthrough/emulated PCI devices > > With these patches we support the following: > > (qemu) device_add spapr-pci-host-bridge,index=2,id=phb2 > (qemu) device_add virtio-net-pci,id=hp2.0,bus=phb2.0 > (qemu) device_del hp2.0 > (qemu) device_del phb2 > > Automatic add/remove of PHBs based on EPOW event mechanism require > updated versions of powerpc-utils, rtas_errd, and librtas. Patches > are forthcoming and will be available in future versions, but for now > we can add them manually by executing the following in the guest > after/before hotplug/unplug, respectively: > > # add PHB > drmgr -c PHB -s "PHB 2" -a -n > > # remove PHB > drmgr -c PHB -s "PHB 2" -r -n > > Feedback/comments are very much appreciated.
I reviewed the QOM/qdev/memory parts. Don't know much about the rest, sorry. :) Paolo > hw/core/qdev.c | 24 ++++++++++++------ > hw/pci/pci.c | 33 +++++++++++++++++++++++++ > hw/ppc/spapr.c | 183 > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- > hw/ppc/spapr_drc.c | 1 + > hw/ppc/spapr_events.c | 5 ++++ > hw/ppc/spapr_iommu.c | 1 + > hw/ppc/spapr_pci.c | 66 > ++++++++++++++++++++++++++++++++++++++++++++++--- > include/hw/pci-host/spapr.h | 3 ++- > include/hw/pci/pci.h | 3 +++ > include/hw/ppc/spapr.h | 1 + > include/hw/qdev-core.h | 3 +++ > 11 files changed, 310 insertions(+), 13 deletions(-) > > >
