The EFI runtime services ABI permits calls to EFI to clobber
certain FPSIMD/NEON registers, as per the AArch64 procedure call

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 <>
 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

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