[Qemu-devel] [PATCH 0/5] ppc: Improve sPAPR CPU compatibility mode settings

[Thomas Huth <thuth@redhat.com>]

If a guest currently only requests PowerISA 2.07 compatiblity mode with
the "ibm,client-architecture-support" firmware call, but does not
specify a matching real PVR for the host CPU on a POWER8 host,
it ends up in POWER7 / PowerISA 2.06 compatibility mode since QEMU
does not support 2.07 compatibility mode yet. This currently happens
when running a Linux guest on a POWER8NVL host, since Linux guests
do not use the PVR for these CPUs for the "ibm,client-architecture-
support" call yet (but I submitted a patch for the kernel to fix this
issue there last week, so the support should soon be there, too).

Anyway, QEMU should also support a proper 2.07 compatibility mode
if the host CPU can do it. So this patch series introduces such a
mode and does some clean-ups and other fixes along the way (e.g.
it splits the ambiguous pcr_mask setting into two variables, one
for defining the valid bits in the PCR register, and one for
storing the valid ISA levels).

Thomas Huth (5):
  ppc/spapr: Refactor h_client_architecture_support() CPU parsing code
  ppc: Split pcr_mask settings into supported bits and the register mask
  ppc: Provide function to get CPU class of the host CPU
  ppc: Improve PCR bit selection in ppc_set_compat()
  ppc: Add PowerISA 2.07 compatibility mode

 hw/ppc/spapr_hcall.c        | 63 +++++++++++++++++++++++++++------------------
 target-ppc/cpu-qom.h        |  3 ++-
 target-ppc/cpu.h            |  1 +
 target-ppc/kvm.c            | 19 ++++++++++----
 target-ppc/kvm_ppc.h        |  7 +++++
 target-ppc/translate_init.c | 22 +++++++++++-----
 6 files changed, 78 insertions(+), 37 deletions(-)

-- 
1.8.3.1