Hi Ard,
On 1/16/2021 8:54 AM, Ard Biesheuvel wrote:
On Fri, 18 Dec 2020 at 22:07, Megha Dey <megha.dey@xxxxxxxxx> wrote:
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@xxxxxxxxxx
Signed-off-by: Megha Dey <megha.dey@xxxxxxxxx>
---
arch/x86/Kconfig.assembler | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/Kconfig.assembler b/arch/x86/Kconfig.assembler
index 26b8c08..9ea0bc8 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@xxxxxxxxx>. All Rights Reserved.
+config AS_VAES_AVX512
+ def_bool $(as-instr,vaesenc %zmm0$(comma)%zmm1$(comma)%zmm1) && 64BIT
Is the '&& 64BIT' necessary here, but not below?
In any case, better to use a separate 'depends on' line, for legibility
yeah , I think the '&& 64 BIT' is not required. I will remove it in the
next version.
-Megha
+ 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
--
2.7.4
