Re: [PATCH 2/2] tests/qtest: Special case sbsa-ref and xlnx-versal-virt if !CONFIG_ARM_GIC_TCG

[Peter Maydell <peter.maydell@linaro.org>]

On Mon, 31 Jan 2022 at 15:59, Andrew Jones <drjones@redhat.com> wrote:
> Hmm, if these machine types completely depend on userspace gicv3
> emulation, i.e. no way to use in-kernel gic or another tcg gic
> model, then I guess they shouldn't be built at all when ARM_GIC_TCG
> isn't configured. I.e.
>
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index 2e0049196d6c..d7cc028b049d 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -209,6 +209,7 @@ config REALVIEW
>
>  config SBSA_REF
>      bool
> +    depends on ARM_GIC_TCG
>      imply PCI_DEVICES
>      select AHCI
>      select ARM_SMMUV3
> @@ -378,6 +379,7 @@ config XLNX_ZYNQMP_ARM
>
>  config XLNX_VERSAL
>      bool
> +    depends on ARM_GIC_TCG
>      select ARM_GIC
>      select PL011
>      select CADENCE

I kind of agree, but isn't this kind of mixing two things?

(1) Both these machines require a GICv3 and a GICv2 won't do,
so they should do something that says "if you want this
machine type, you need a GICv3 device"

(2) Both these machines don't work with KVM or hvf, so if we're
not building TCG then there's no point configuring in these
machine models (a property they share with every other arm
machine type except "virt", currently)

thanks
-- PMM