Messages in this thread Patch in this message | | | From | Masahiro Yamada <> | Subject | [PATCH v2 11/16] x86: add comments about the binutils version to support code in as-instr | Date | Thu, 26 Mar 2020 17:00:59 +0900 |
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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 need to keep these as-instr checks because binutils 2.21 does not support them.
I hope this will be a good hint which one can be dropped when we bump the minimal binutils version next time.
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 <masahiroy@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> ---
Changes in v2: - Change the patch order and rebase
arch/x86/Kconfig.assembler | 10 ++++++++++ 1 file changed, 10 insertions(+)
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 -- 2.17.1
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