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arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON

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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>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Dave Martin 2017-10-31 15:50:57 +00:00 committed by Will Deacon
parent 93390c0a1b
commit b472db6cf8
1 changed files with 1 additions and 0 deletions
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arch/arm64/Kconfig
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@ -1064,6 +1064,7 @@ 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