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

On Wed, Jan 26, 2022 at 09:07:48AM +0000, Marc Zyngier wrote:

Mark Brown broonie@kernel.org wrote:

...

/* Distributor setup */

• gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);

• gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);

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?