[PATCH] kselftest: kvm/arm64: Skip tests if we can't create a vgic-v3

[Mark Brown]

On Wed, Jan 26, 2022 at 01:05:01PM +0000, Marc Zyngier wrote:
> Mark Brown <broonie at kernel.org> wrote:

> > > So you now only test whether it is possible to create a virtual GICv3,
> > > but don't actually create it. How does this work?

> > Oh, that's rather obscure in the API - so the file descriptor returned
> > if the test flag is specified can't actually be used?

> No file descriptor is returned at all from the kernel, so you should
> always get -1 as populated by kvm_create_device().

> See virt/kvm/kvm_main.c::kvm_ioctl_create_device().

Ugh, right - the descriptor is returned separately to the return code
but is then mapped onto the return code by the library since the library
just aborts on error in the non-test case and in the test case the kernel
returns an inverted boolean which gets passed straight through.  Like I
say the API seems a bit confusing here.
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