[Qemu-devel] RFC: Only display help options that are accepted by the architecture

[Michael Ellerman]

Hi all,

As the subject says, this is an RFC.

I have a few patches (to follow), that change the help output from QEMU
so that we only display options that are accepted by the arch of the
running binary.

So for example qemu-system-ppc64 will not tell you about i386 options
like -no-acpi, -no-hpet etc.

We already have almost all the information we need, it just requires
actually filtering the options as we print them in the help text - and
some related cruft, see the patches for details.

I'd argue it's generally a sane change, but it also has the benefit that
it makes libvirt's life easier. For better or worse libvirt parses the
output of qemu -h to see what options are supported. At the moment that
is problematic because the ppc64 emulator claims to support -no-acpi
etc. So with this change libvirt could more reliably determine what is
supported.

cheers

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