[RFC V2 2/5] x86: Probe assembler capabilities for VAES and VPLCMULQDQ support
From: Megha Dey <hidden>
Date: 2021-01-23 07:30:45
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
This is a preparatory patch to introduce the optimized crypto algorithms using AVX512 instructions which would require VAES and VPLCMULQDQ support. Check for VAES and VPCLMULQDQ assembler support using AVX512 registers. Cc: x86@kernel.org Signed-off-by: Megha Dey <redacted> --- arch/x86/Kconfig.assembler | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/arch/x86/Kconfig.assembler b/arch/x86/Kconfig.assembler
index 26b8c08..1b07bc6 100644
--- a/arch/x86/Kconfig.assembler
+++ b/arch/x86/Kconfig.assembler@@ -1,6 +1,16 @@ # SPDX-License-Identifier: GPL-2.0 # Copyright (C) 2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. +config AS_VAES_AVX512 + def_bool $(as-instr,vaesenc %zmm0$(comma)%zmm1$(comma)%zmm1) + help + Supported by binutils >= 2.30 and LLVM integrated assembler + +config AS_VPCLMULQDQ + def_bool $(as-instr,vpclmulqdq \$0$(comma)%zmm2$(comma)%zmm6$(comma)%zmm4) + help + Supported by binutils >= 2.30 and LLVM integrated assembler + config AS_AVX512 def_bool $(as-instr,vpmovm2b %k1$(comma)%zmm5) help
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2.7.4