[03/27] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON
Commit Message
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@arm.com>
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
Comments
Dave Martin <Dave.Martin@arm.com> writes:
> 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@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
> ---
> arch/arm64/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index dfd9086..fdc302e 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -1050,6 +1050,7 @@ 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
--
Alex Bennée
@@ -1050,6 +1050,7 @@ 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