From: Masahiro Yamada Date: Thu, 26 Mar 2020 08:00:59 +0000 (+0900) Subject: x86: add comments about the binutils version to support code in as-instr X-Git-Tag: v5.7-rc1~12^2~23 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=e9e070cfe141e73588f1e48ca3f51d1183b8b646;p=linux-2.6-block.git x86: add comments about the binutils version to support code in as-instr We raise the minimal supported binutils version from time to time. The last bump was commit 1fb12b35e5ff ("kbuild: Raise the minimum required binutils version to 2.21"). We have these as-instr tests because binutils 2.21 does not support them. When we bump the binutils version next time, this will be a good hint to find out which one can be dropped. As for the Clang/LLVM builds, we require very new LLVM version, so the LLVM integrated assembler supports all of them. Signed-off-by: Masahiro Yamada Acked-by: Jason A. Donenfeld Acked-by: Ingo Molnar Acked-by: Nick Desaulniers --- diff --git a/arch/x86/Kconfig.assembler b/arch/x86/Kconfig.assembler index 91230bf11a14..a5a1d2766b3a 100644 --- a/arch/x86/Kconfig.assembler +++ b/arch/x86/Kconfig.assembler @@ -3,15 +3,25 @@ config AS_AVX2 def_bool $(as-instr,vpbroadcastb %xmm0$(comma)%ymm1) + help + Supported by binutils >= 2.22 and LLVM integrated assembler config AS_AVX512 def_bool $(as-instr,vpmovm2b %k1$(comma)%zmm5) + help + Supported by binutils >= 2.25 and LLVM integrated assembler config AS_SHA1_NI def_bool $(as-instr,sha1msg1 %xmm0$(comma)%xmm1) + help + Supported by binutils >= 2.24 and LLVM integrated assembler config AS_SHA256_NI def_bool $(as-instr,sha256msg1 %xmm0$(comma)%xmm1) + help + Supported by binutils >= 2.24 and LLVM integrated assembler config AS_ADX def_bool $(as-instr,adox %eax$(comma)%eax) + help + Supported by binutils >= 2.23 and LLVM integrated assembler