[PATCH v7 0/2] Remove EPYC mode apicid decode and use generic decode

[Babu Moger]

To support some of the complex topology, we introduced EPYC mode apicid decode.
But, EPYC mode decode is running into problems. Also it can become quite a
maintenance problem in the future. So, it was decided to remove that code and
use the generic decode which works for majority of the topology. Most of the
SPECed configuration would work just fine. With some non-SPECed user inputs,
it will create some sub-optimal configuration.

Here is the discussion thread.
https://lore.kernel.org/qemu-devel/c0bcc1a6-1d84-a6e7-e468-d5b437c1b254@amd.com/
https://lore.kernel.org/qemu-devel/20200826143849.59f6970b@redhat.com/

This series removes all the EPYC mode specific apicid changes and use the 
generic
apicid decode.
---
v7:
 Eduardo has already queued 1-8 from the v6. Sending rest of the patches.
 Fixed CPUID 800000ld based on Igor's comment and few text changes.
 
v6:
 
https://lore.kernel.org/qemu-devel/159889924378.21294.16494070903874534542.stgit@naples-babu.amd.com/
 Found out that numa configuration is not mandatory for all the EPYC model 
topology.
 We can use the generic decode which works pretty well. Also noticed that
 cpuid does not changes when the numa nodes change(NPS- Nodes per socket).
 Took care of couple comments from Igor and Eduardo.
 Thank you Igor, Daniel, David, Eduardo for your feedback.  

v5:
 
https://lore.kernel.org/qemu-devel/159804762216.39954.15502128500494116468.stgit@naples-babu.amd.com/
 Revert EPYC specific decode.
 Simplify CPUID_8000_001E

v4:
  
https://lore.kernel.org/qemu-devel/159744083536.39197.13827776633866601278.stgit@naples-babu.amd.com/
  Not much of a change. Just added few text changes.
  Error out configuration instead of warning if dies are not configured in EPYC.
  Few other text changes to clarify the removal of node_id, nr_nodes and 
nodes_per_pkg.

v3:
  
https://lore.kernel.org/qemu-devel/159681772267.9679.1334429994189974662.stgit@naples-babu.amd.com/#r
  Added a new check to pass the dies for EPYC numa configuration.
  Added Simplify CPUID_8000_001E patch with some changes suggested by Igor.
  Dropped the patch to build the topology from CpuInstanceProperties.
  TODO: Not sure if we still need the Autonuma changes Igor mentioned.
  Needs more clarity on that.

v2:
  
https://lore.kernel.org/qemu-devel/159362436285.36204.986406297373871949.stgit@naples-babu.amd.com/
  Used the numa information from CpuInstanceProperties for building
  the apic_id suggested by Igor.
  Also did some minor code re-aarangement to take care of changes.
  Dropped the patch "Simplify CPUID_8000_001E" from v1. Will send
  it later.

v1:
 
https://lore.kernel.org/qemu-devel/159164739269.20543.3074052993891532749.stgit@naples-babu.amd.com

Babu Moger (2):
      i386: Simplify CPUID_8000_001d for AMD
      i386: Simplify CPUID_8000_001E for AMD


 target/i386/cpu.c |  226 ++++++++++++++---------------------------------------
 1 file changed, 61 insertions(+), 165 deletions(-)

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