Re: [Xen-devel] [PATCH v5 07/10] arm: add a tiny kconfig configuration

[Julien Grall <julien.grall@xxxxxxx>]

Hi Stefano,

On 04/06/18 18:24, Stefano Stabellini wrote:
> Add a tiny kconfig configuration. Enabled NULL and Credit schedulers.
> Support only 8 cpus. It only carries non-default options (use make
I don't see where 8 CPUs would only be supported as the default value is 
128 cpus.
> olddefconfig to produce a complete .config file).
With all the series I did the following things:
        1) copy tiny.config to .config
        2) make olddefconfig
        3) make menuconfig and select QEMU

After 1) the numbers of CPUs are set to 128. After 3) I would expect the
number of CPUs to go down to 8. Unfortunately this is not the cases.

So your command does not seem to be enough here.

> Signed-off-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
>
> ---
> ---
>   xen/arch/arm/configs/tiny.conf | 43 ++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 43 insertions(+)
>   create mode 100644 xen/arch/arm/configs/tiny.conf
>
> diff --git a/xen/arch/arm/configs/tiny.conf b/xen/arch/arm/configs/tiny.conf
> new file mode 100644
> index 0000000..e9a5e65
> --- /dev/null
> +++ b/xen/arch/arm/configs/tiny.conf
> @@ -0,0 +1,43 @@
> +CONFIG_ARM_64=y
This config targets arm64. So I would name it tiny64.conf.

> +CONFIG_ARM=y
> +
> +#
> +# Architecture Features
> +#
> +# CONFIG_GICV3 is not set
> +# CONFIG_MEM_ACCESS is not set
> +# CONFIG_SBSA_VUART_CONSOLE is not set
> +
> +#
> +# Common Features
> +#
> +# CONFIG_TMEM is not set
> +
> +#
> +# Schedulers
> +#
> +# CONFIG_SCHED_CREDIT2 is not set
> +# CONFIG_SCHED_RTDS is not set
> +# CONFIG_SCHED_ARINC653 is not set
> +CONFIG_SCHED_NULL=y
> +CONFIG_SCHED_NULL_DEFAULT=y
> +CONFIG_SCHED_DEFAULT="null"
> +# CONFIG_SUPPRESS_DUPLICATE_SYMBOL_WARNINGS is not set
> +
> +#
> +# Device Drivers
> +#
> +# CONFIG_HAS_NS16550 is not set
> +# CONFIG_HAS_CADENCE_UART is not set
> +# CONFIG_HAS_MVEBU is not set
> +# CONFIG_HAS_PL011 is not set
> +# CONFIG_HAS_SCIF is not set
> +# CONFIG_ARM_SMMU is not set
> +
> +#
> +# Debugging Options
> +#
> +# CONFIG_DEBUG is not set
> +# CONFIG_FRAME_POINTER is not set
> +# CONFIG_VERBOSE_DEBUG is not set
> +# CONFIG_SCRUB_DEBUG is not set
Cheers,

--
Julien Grall

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