[RFC PATCH 06/29] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON

[Ard Biesheuvel]

On 25 November 2016 at 19:38, Dave Martin <Dave.Martin at arm.com> wrote:
> The EFI runtime services ABI permits calls to EFI to clobber
> certain FPSIMD/NEON registers, as per the AArch64 procedure call
> standard.
>
> Saving/restoring the clobbered registers around such calls needs
> KERNEL_MODE_NEON, but the dependency is missing from Kconfig.
>
> This patch adds the missing dependency.
>
> This will aid bisection of the patches implementing support for the
> ARM Scalable Vector Extension (SVE).
>
> Signed-off-by: Dave Martin <Dave.Martin at arm.com>

Acked-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 969ef88..d008bb6 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -963,6 +963,7 @@ config EFI_STUB
>  config EFI
>         bool "UEFI runtime support"
>         depends on OF && !CPU_BIG_ENDIAN
> +       depends on KERNEL_MODE_NEON
>         select LIBFDT
>         select UCS2_STRING
>         select EFI_PARAMS_FROM_FDT
> --
> 2.1.4
>