This is my latest draft of a PAPR extension allowing a guest's Hash
Page Table (HPT) to be resized at runtime (to better respond to memory
hotplug events).
This series contains the qemu portions of the implementation: a full
implementation for TCG and KVM PR guests, and hooks to enable and
advertise the KVM HV implementation when available.
To use this requires a guest which is aware of HPT resizing, and, if
using KVM HV, a host KVM which implements it as well. The latest
guest and host kernel implementations can be found here:
https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-March/140896.html
David Gibson (6):
pseries: Stubs for HPT resizing
pseries: Implement HPT resizing
pseries: Enable HPT resizing for 2.6
pseries: Use smaller default hash page tables when guest can resize
pseries: Allow HPT resizing on PR KVM
pseries: Allow KVM HV implementation of HPT resizing to be used
hw/ppc/spapr.c | 84 +++++++++-
hw/ppc/spapr_hcall.c | 405 +++++++++++++++++++++++++++++++++++++++++++++-
include/hw/ppc/spapr.h | 21 ++-
linux-headers/linux/kvm.h | 1 +
target-ppc/kvm.c | 54 +++++++
target-ppc/kvm_ppc.h | 6 +
target-ppc/mmu-hash64.h | 4 +
trace-events | 2 +
8 files changed, 567 insertions(+), 10 deletions(-)
--
2.5.0
