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authorNathan Chancellor <nathan@kernel.org>2021-02-09 01:57:20 +0100
committerWill Deacon <will@kernel.org>2021-02-09 15:27:51 +0100
commite9c6deee00e9197e75cd6aa0d265d3d45bd7cc28 (patch)
tree17201bb071934c67a5cff2c1e54712c5670309f7 /arch/arm64
parentarm64: vmlinux.ld.S: add assertion for tramp_pg_dir offset (diff)
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arm64: Make CPU_BIG_ENDIAN depend on ld.bfd or ld.lld 13.0.0+
Similar to commit 28187dc8ebd9 ("ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN depends on !LD_IS_LLD"), ld.lld prior to 13.0.0 does not properly support aarch64 big endian, leading to the following build error when CONFIG_CPU_BIG_ENDIAN is selected: ld.lld: error: unknown emulation: aarch64linuxb This has been resolved in LLVM 13. To avoid errors like this, only allow CONFIG_CPU_BIG_ENDIAN to be selected if using ld.bfd or ld.lld 13.0.0 and newer. While we are here, the indentation of this symbol used spaces since its introduction in commit a872013d6d03 ("arm64: kconfig: allow CPU_BIG_ENDIAN to be selected"). Change it to tabs to be consistent with kernel coding style. Link: https://github.com/ClangBuiltLinux/linux/issues/380 Link: https://github.com/ClangBuiltLinux/linux/issues/1288 Link: https://github.com/llvm/llvm-project/commit/7605a9a009b5fa3bdac07e3131c8d82f6d08feb7 Link: https://github.com/llvm/llvm-project/commit/eea34aae2e74e9b6fbdd5b95f479bc7f397bf387 Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Link: https://lore.kernel.org/r/20210209005719.803608-1-nathan@kernel.org Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/Kconfig5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index f39568b28ec1..912da4e2ab59 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -952,8 +952,9 @@ choice
that is selected here.
config CPU_BIG_ENDIAN
- bool "Build big-endian kernel"
- help
+ bool "Build big-endian kernel"
+ depends on !LD_IS_LLD || LLD_VERSION >= 130000
+ help
Say Y if you plan on running a kernel with a big-endian userspace.
config CPU_LITTLE_ENDIAN