[PATCH v2 3/3] config/arm: allow WFE to be enabled config time

[Honnappa Nagarahalli]

> On Feb 1, 2024, at 3:57 PM, pbhagavatula at marvell.com wrote:
> 
> From: Pavan Nikhilesh <pbhagavatula at marvell.com>
> 
> Allow RTE_ARM_USE_WFE to be enabled at meson configuration
> time by passing it via c_args instead of modifying
> `config/arm/meson.build`.
> 
> Example usage:
> meson build -Dc_args='-DRTE_ARM_USE_WFE' \
> --cross-file config/arm/arm64_cn10k_linux_gcc
> 
> Signed-off-by: Pavan Nikhilesh <pbhagavatula at marvell.com>
> Acked-by: Chengwen Feng <fengchengwen at huawei.com>
> Acked-by: Ruifeng Wang <ruifeng.wang at arm.com>
> ---
> config/arm/meson.build | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/config/arm/meson.build b/config/arm/meson.build
> index 6f2308f2fa..3467bef466 100644
> --- a/config/arm/meson.build
> +++ b/config/arm/meson.build
> @@ -17,7 +17,9 @@ flags_common = [
>         #    ['RTE_ARM64_MEMCPY_ALIGN_MASK', 0xF],
>         #    ['RTE_ARM64_MEMCPY_STRICT_ALIGN', false],
> 
> -        ['RTE_ARM_USE_WFE', false],
> +        # Enable use of ARM wait for event instruction.
> +        # ['RTE_ARM_USE_WFE', false],
> +
So, what is the default value for RTE_ARM_USE_WFE if the user does not pass the flag at the command line?

Can we do it such a way that the flag passed on the command line takes precedence?

>         ['RTE_ARCH_ARM64', true],
>         ['RTE_CACHE_LINE_SIZE', 128]
> ]
> -- 
> 2.25.1
>