[Qemu-ppc] [PATCH 0/4] ppc: fix migration with KVM PR (nested)

[Greg Kurz]

A guest running with KVM PR ends up irresponsive after migration most of the
time. This happens because the HPT allocated by QEMU is likely to have a
different address on the destination than it had on the source, but we push
the source address to KVM.

This series does a little cleanup and fixes the issue. I could successfully
test it with a nested setup (KVM PR running in KVM HV).

However, this isn't enough to fix migration when using KVM PR on baremetal...
CPUs seem to end up looping on H_CEDE in the guest. I can't figure out what's
happening... Any suggestion would be appreciated.

Cheers,

--
Greg

---

Greg Kurz (4):
      spapr: only update SDR1 once per-cpu during CAS
      spapr: introduce a helper to compute the address of the HPT
      ppc: kvm: introduce a helper to update SDR1 for a single CPU
      ppc: kvm: update HPT pointer in KVM PR after migration


 hw/ppc/spapr.c          |   15 +++++++++++++++
 hw/ppc/spapr_cpu_core.c |    8 +++-----
 hw/ppc/spapr_hcall.c    |   20 +++++++++-----------
 include/hw/ppc/spapr.h  |    1 +
 target/ppc/cpu.h        |    1 +
 target/ppc/kvm.c        |   12 ++++++++----
 target/ppc/kvm_ppc.h    |    3 ++-
 target/ppc/machine.c    |    7 +++++++
 8 files changed, 46 insertions(+), 21 deletions(-)