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[libvirt] [PATCHv2 00/16] Introduce hvf domain type for Hypevisor.framework

Hypervisor.framework provides a lightweight interface to run a virtual
cpu on macOS without the need to install third-party kernel
extensions (KEXTs).

It's supported since macOS 10.10 on machines with Intel VT-x feature
set that includes Extended Page Tables (EPT) and Unrestricted Mode.

QEMU supports Hypervisor.framework since 2.12.

The patch series adds "hvf" domain that uses Hypevisor.framework.

v1: https://www.redhat.com/archives/libvir-list/2018-October/msg01090.html

Changes since v1:
- [x] Fixed unconditional addition of KVM CPU models into capabilities cache.
  That fixed a "make check" issue in qemucapabilitiestest on Linux.
- [x] Fixed missing brace in virQEMUCapsFormatCPUModels in PATCH 6
- [x] Squashed patch 12 into the first patch (second one in the patch series)
- [x] Added hvf domain definition to docs/formatdomain.html.in into the first
  patch (second in the patch series)
- [x] Removed redundant argument in virQEMUCapsProbeHVF (patch 3)
- [x] Added separate virQEMUCapsProbeHVF for non-apple platforms (patch 3)
- [x] Added macOS support page
- [x] Marked HVF support for all working domain elements

I wasn't able to resolve the issues below, but I think they should go
into separate patches/patch series:
- [ ] To make qemucapabilitiestests work regardless of OS, accelerator probing
  should be done via QMP command.
So, there's a need to add a new generic
  command to QEMU "query-accelerator accel=NAME"
- [ ] VIRT_TEST_PRELOAD doesn't work on macOS. There are a few
    * DYLD_INSERT_LIBRARIES should be used instead of LD_PRELOAD
-module flag shouldn't be added to LDFLAGS in tests/Makefile.am.
      The flag instructs libtool to creates bundles (MH_BUNDLE) instead of
      dynamic libraries (MH_DYLIB) and unlike dylibs they cannot be preloaded.
    * Either symbol interposing or flat namespaces should be used to perform
      overrides of the calls to the mocks.
      I've tried both but neither worked for me, need to make a minimal
  I haven't completed the investigation as it looks like a separate work item.
- [ ] Can't retrieve qemucapsprobe replies for macOS because qemucapsprobemock
  is not getting injected because of the issue with VIRT_TEST_PRELOAD
- [ ] Can't add to tests/qemuxml2argvtest.c to illustrate the hvf example
  because qemucapsprobe doesn't work yet.

Roman Bolshakov (16):
  qemu: Add KVM CPUs into cache only if KVM is present
  conf: Add hvf domain type
  qemu: Define hvf capability
  qemu: Query hvf capability on macOS
  qemu: Expose hvf domain type if hvf is supported
  qemu: Rename kvmCPU to accelCPU
  qemu: Introduce virQEMUCapsTypeIsAccelerated
  qemu: Introduce virQEMUCapsHaveAccel
  qemu: Introduce virQEMUCapsToVirtType
  qemu: Introduce virQEMUCapsAccelStr
  qemu: Make error message accel-agnostic
  qemu: Correct CPU capabilities probing for hvf
  news: Mention hvf domain type
  docs: Add hvf on QEMU driver page
  docs: Note hvf support for domain elements
  docs: Add support page for libvirt on macOS

 docs/docs.html.in             |   3 +
 docs/drvqemu.html.in          |  49 +++++++-
 docs/formatdomain.html.in     | 141 ++++++++++++---------
 docs/index.html.in            |   4 +-
 docs/macos.html.in            | 229 ++++++++++++++++++++++++++++++++++
 docs/news.xml                 |  12 ++
 docs/schemas/domaincommon.rng |   1 +
 src/conf/domain_conf.c        |   4 +-
 src/conf/domain_conf.h        |   1 +
 src/qemu/qemu_capabilities.c  | 201 +++++++++++++++++++++--------
 src/qemu/qemu_capabilities.h  |   1 +
 src/qemu/qemu_command.c       |   4 +
 12 files changed, 534 insertions(+), 116 deletions(-)
 create mode 100644 docs/macos.html.in


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