[PATCH v2 00/10] Generate x86 cpu features

[Tim Wiederhake]

Synchronizing the list of cpu features and models with qemu is a recurring
task in libvirt. For x86, this is done by reading qom-list-properties for
max-x86_64-cpu and manually filtering out everthing that does not look like
a feature name, as well as parsing target/i386/cpu.c for cpu models.

This is a flawed, tedious and error-prone procedure. Ideally, qemu
and libvirt would query a common source for cpu feature and model
related information. Meanwhile, converting this information into an easier
to parse format would help libvirt a lot.

This patch series converts the cpu feature information present in
target/i386/cpu.c (`feature_word_info`) into a yaml file and adds a
script to generate the c code from this data.

A patch set to convert the cpu model data (`builtin_x86_defs`) in the
same way will follow.

v1: https://lists.nongnu.org/archive/html/qemu-devel/2023-08/msg02005.html

Changes since v1:
* Incorporated changes from
  https://lists.nongnu.org/archive/html/qemu-devel/2023-08/msg04241.html.
* Changed data format from xml to yaml, as proposed in
  https://lists.nongnu.org/archive/html/qemu-devel/2023-09/msg01033.html.
  Using json has some drawbacks, see
  https://lists.nongnu.org/archive/html/qemu-devel/2023-08/msg03384.html.
* Rebased on top of current master. Features added in the meantime:
  amx-complex and vmx-enable-user-wait-pause
* Split up the reformatting of feature_word_info.c.inc to make it easier
  to review. These patches could be squashed together before merging.

Tim Wiederhake (10):
  target/i386: Add missing feature names in FEAT_VMX_EPT_VPID_CAPS
  target/i386: Fix feature names in FEAT_VMX_EPT_VPID_CAPS
  target/i386: Fix duplicated feature name in FEAT_KVM
  target/i386: Split out feature_word_info
  target/i386: Translate feature_word_info to yaml
  target/i386: Format feature_word_info.c.inc: Remove comments
  target/i386: Format feature_word_info.c.inc: feat_names
  target/i386: Format feature_word_info.c.inc: Unfold cpuid member
  target/i386: Format feature_word_info.c.inc: Whitespaces and trailing
    commas
  target/i386: Autogenerate feature_word_info.c.inc

 target/i386/cpu.c                   |  677 +-----------------
 target/i386/feature_word_info.c.inc | 1030 +++++++++++++++++++++++++++
 target/i386/feature_word_info.py    |   62 ++
 target/i386/feature_word_info.yaml  |  697 ++++++++++++++++++
 4 files changed, 1790 insertions(+), 676 deletions(-)
 create mode 100644 target/i386/feature_word_info.c.inc
 create mode 100755 target/i386/feature_word_info.py
 create mode 100644 target/i386/feature_word_info.yaml

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2.39.2