[PATCH qemu/qemu-server 0/3] include Hyper-V enlightenment flags in CPU flags lists

[Arthur Bied-Charreton <a.bied-charreton@proxmox.com>]

This series addresses two issues with CPU flag support detection.

First, as reported on the forum [0], the Hyper-V enlightenment flags
(hv-*) are always reported as unsupported. The temporary VM that
query_supported_cpu_flags [1] queries is spawned with `-cpu host`,
which by itself does not advertise those flags. The qemu-server
commit fixes this by additionally enabling hv-passthrough on that VM
when querying flags for KVM.

Second, in the context of custom CPU models, the hv-* flags are not
part of the base list at all, not even as unsupported, making it
impossible to set them without editing cpu-models.conf manually (the
VM-specific flags in the create wizard and processor edit window are
unaffected, since they use a different base list [2]). That base list
is generated from the `-cpu help` output at pve-qemu-kvm build time [3].
The first pve-qemu patch extends the parsing script to additionally
query the hv-* flags via the qom-list-properties QMP command.

The final pve-qemu patch pins the resulting flag list into the
repository and fails the build on any divergence, as already done for
CPU models. This makes sure flag additions are surfaced for review on
QEMU bumps.

The fixes can be applied independently. The qemu-server one is the
most pressing, as it fixes the regression reported in the forum.

[0] https://forum.proxmox.com/threads/incorrect-supported-cpu-flags.183722/#post-853902
[1] https://git.proxmox.com/?p=qemu-server.git;a=blob;f=src/PVE/QemuServer.pm;h=118f26bc94d9ee8e8c4c39a3d710e67c14f61bc0;hb=refs/heads/master#l2941
[2] https://git.proxmox.com/?p=qemu-server.git;a=blob;f=src/PVE/QemuServer/CPUFlags.pm;h=0d3206b2d3119c44a9dd9dd817b838767afbefd7;hb=refs/heads/master#l19
[3] https://git.proxmox.com/?p=pve-qemu.git;a=blob;f=debian/rules;h=c90db29b0f03568224b1c79431bce2b753283a4d;hb=refs/heads/master#l126


qemu-server:

Arthur Bied-Charreton (1):
  cpu flags: include Hyper-V enlightenment flags in supported flags

 src/PVE/QemuServer.pm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)


pve-qemu:

Arthur Bied-Charreton (2):
  build: query Hyper-V enlightenment flags for CPU flags list
  build: fail when recognized CPU flags list changes

 debian/parse-cpu-flags.pl            |  42 +++
 debian/recognized-CPUID-flags-x86_64 | 412 +++++++++++++++++++++++++++
 debian/rules                         |   6 +-
 3 files changed, 459 insertions(+), 1 deletion(-)
 create mode 100644 debian/recognized-CPUID-flags-x86_64


Summary over all repositories:
  4 files changed, 463 insertions(+), 2 deletions(-)

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