[PATCH 0/6] pseries NUMA distance calculation

[Daniel Henrique Barboza]

Hi,

This series is a follow-up of the reworked pSeries NUMA
code that is already merged upstream. It contains some of
the patches that were presented in the first version of this
work [1], some of them changed based on the reviews made
back there. 

With this series, we're able to take user input into consideration
when setting up the NUMA topology of the guest. It is still an
approximation, but at least user input is not completely ignored.

The changes will only be effective with pseries-5.2 and newer
machines, and if more than one NUMA node is declared by the user.
The idea is that we don't want to tamper with legacy guest behavior.
Patch 6 has examples of how we are approximating NUMA distance
via user input.

The series was rebased using David's ppc-for-5.2 at
4cca31df828.


Changes carried over from [1]:
- patch 1 (former 4): same patch, added David's r-b
- patch 2 (former 2): the check for asymetrical NUMA was moved
to spapr code as requested in the review
- patch 4 is a merge of former patches 5 and 6
- patch 5 (former 9): reworked
- patch 6 (former 10): same patch

Patch 3 is new in the series.



[1] https://lists.gnu.org/archive/html/qemu-devel/2020-08/msg03169.html



Daniel Henrique Barboza (6):
  spapr: add spapr_machine_using_legacy_numa() helper
  spapr_numa: forbid asymmetrical NUMA setups
  spapr_numa: translate regular NUMA distance to PAPR distance
  spapr_numa: change reference-points and maxdomain settings
  spapr_numa: consider user input when defining associativity
  specs/ppc-spapr-numa: update with new NUMA support

 docs/specs/ppc-spapr-numa.rst | 213 ++++++++++++++++++++++++++++++++++
 hw/ppc/spapr.c                |  12 ++
 hw/ppc/spapr_numa.c           | 184 +++++++++++++++++++++++++++--
 include/hw/ppc/spapr.h        |   2 +
 4 files changed, 402 insertions(+), 9 deletions(-)

-- 
2.26.2