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.mar...@arm.com>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
Acked-by: Catalin Marinas <catalin.mari...@arm.com>
Cc: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 05aa592..5cfb79d 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -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
--
2.1.4
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