other: 0.112
semantic: 0.101
graphic: 0.088
debug: 0.088
PID: 0.087
permissions: 0.085
boot: 0.065
device: 0.064
vnc: 0.059
performance: 0.056
KVM: 0.050
network: 0.050
files: 0.049
socket: 0.047
KVM: 0.703
debug: 0.070
files: 0.060
other: 0.034
semantic: 0.027
PID: 0.016
socket: 0.013
boot: 0.013
device: 0.012
network: 0.011
performance: 0.011
permissions: 0.011
graphic: 0.011
vnc: 0.006

Help content missing for newly added machine properties


Help content missing for newly added machine properties, it would be needed by libvirt and other management layers to query to add support, Thanks.

max-cpu-compat,vsmt,modern-hotplug-events,resize-hpt

Steps:
1. Compile qemu @below commit
2. ./ppc64-softmmu/qemu-system-ppc64 -h
....
-machine [type=]name[,prop[=value][,...]]
                selects emulated machine ('-machine help' for list)
                property accel=accel1[:accel2[:...]] selects accelerator
                supported accelerators are kvm, xen, hax or tcg (default: tcg)
                kernel_irqchip=on|off|split controls accelerated irqchip support (default=off)
                vmport=on|off|auto controls emulation of vmport (default: auto)
                kvm_shadow_mem=size of KVM shadow MMU in bytes
                dump-guest-core=on|off include guest memory in a core dump (default=on)
                mem-merge=on|off controls memory merge support (default: on)
                igd-passthru=on|off controls IGD GFX passthrough support (default=off)
                aes-key-wrap=on|off controls support for AES key wrapping (default=on)
                dea-key-wrap=on|off controls support for DEA key wrapping (default=on)
                suppress-vmdesc=on|off disables self-describing migration (default=off)
                nvdimm=on|off controls NVDIMM support (default=off)
                enforce-config-section=on|off enforce configuration section migration (default=off)
                s390-squash-mcss=on|off controls support for squashing into default css (default=off)
....

===> Not showing help of mentioned properties.



Verified at todays below commit
#git show
commit d8f932cc696250cb740240d668b39df5fbb2d5a0
Merge: 67caeea 4504273
Author: Peter Maydell <email address hidden>
Date:   Thu Oct 5 16:54:29 2017 +0100

    Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' into staging
    
    # gpg: Signature made Thu 05 Oct 2017 15:25:21 BST
    # gpg:                using RSA key 0x9CA4ABB381AB73C8
    # gpg: Good signature from "Stefan Hajnoczi <email address hidden>"
    # gpg:                 aka "Stefan Hajnoczi <email address hidden>"
    # Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8
    
    * remotes/stefanha/tags/tracing-pull-request:
      checkpatch: fix incompatibility with old perl
    
    Signed-off-by: Peter Maydell <email address hidden>

Hmm... -h is common to all targets, ie, you should only find properties that can be passed to -machine for all qemu-system-* binaries (I don't know how s390-squash-mcss landed there but it looks wrong).

The right way to query properties supported by a pseries machine type is:

$ ./ppc64-softmmu/qemu-system-ppc64 -machine pseries,help
pseries-2.11.kvm-type=string (Specifies the KVM virtualization mode (HV, PR))
pseries-2.11.vsmt=uint32 (Virtual SMT: KVM behaves as if this were the host's SMT mode)
pseries-2.11.modern-hotplug-events=bool (Use dedicated hotplug event mechanism in place of standard EPOW events when possible (required for memory hot-unplug support))
pseries-2.11.max-cpu-compat=string (Maximum permitted CPU compatibility mode. Valid values are power6, power7, power7+, power8, power9.)
pseries-2.11.resize-hpt=string (Resizing of the Hash Page Table (enabled, disabled, required))
pseries-2.11.kvm-shadow-mem=int (KVM shadow MMU size)
pseries-2.11.enforce-config-section=bool (Set on to enforce configuration section migration)
pseries-2.11.initrd=string (Linux initial ramdisk file)
pseries-2.11.mem-merge=bool (Enable/disable memory merge support)
pseries-2.11.firmware=string (Firmware image)
pseries-2.11.dtb=string (Linux kernel device tree file)
pseries-2.11.suppress-vmdesc=bool (Set on to disable self-describing migration)
pseries-2.11.usb=bool (Set on/off to enable/disable usb)
pseries-2.11.kernel=string (Linux kernel image file)
pseries-2.11.dt-compatible=string (Overrides the "compatible" property of the dt root node)
pseries-2.11.igd-passthru=bool (Set on/off to enable/disable igd passthrou)
pseries-2.11.dumpdtb=string (Dump current dtb to a file and quit)
pseries-2.11.append=string (Linux kernel command line)
pseries-2.11.accel=string (Accelerator list)
pseries-2.11.kernel-irqchip=OnOffSplit (Configure KVM in-kernel irqchip)
pseries-2.11.dump-guest-core=bool (Include guest memory in  a core dump)
pseries-2.11.phandle-start=int (The first phandle ID we may generate dynamically)
pseries-2.11.graphics=bool (Set on/off to enable/disable graphics emulation)