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Message-ID: <CAKwvOdm1B=Wc6zcxpapcbeReX0_2V3AiqxGUgikL4ypztZkUEg@mail.gmail.com>
Date: Mon, 23 Mar 2020 12:45:56 -0700
From: Nick Desaulniers <ndesaulniers@...gle.com>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
"H . Peter Anvin" <hpa@...or.com>,
LKML <linux-kernel@...r.kernel.org>,
"Jason A . Donenfeld" <Jason@...c4.com>,
Allison Randal <allison@...utok.net>,
Armijn Hemel <armijn@...ldur.nl>,
"David S. Miller" <davem@...emloft.net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
Ingo Molnar <mingo@...hat.com>,
Kate Stewart <kstewart@...uxfoundation.org>,
Song Liu <songliubraving@...com>,
Zhengyuan Liu <liuzhengyuan@...inos.cn>,
clang-built-linux <clang-built-linux@...glegroups.com>,
"open list:HARDWARE RANDOM NUMBER GENERATOR CORE"
<linux-crypto@...r.kernel.org>
Subject: Re: [PATCH 0/7] x86: remove always-defined CONFIG_AS_* options
On Sun, Mar 22, 2020 at 7:09 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> arch/x86/Makefile tests instruction code by $(call as-instr, ...)
>
> Some of them are very old.
> For example, the check for CONFIG_AS_CFI dates back to 2006.
>
> We raise GCC versions from time to time, and we clean old code away.
> The same policy applied to binutils.
>
> The current minimal supported version of binutils is 2.21
>
> This is new enough to recognize the instruction in most of
> as-instr calls.
I'm quite happy to see this series; a few weekends ago I was playing
around with adding dwarf-5 support to the Linux kernel, and was
looking at these noticing there was quite a bit of cruft.
Unfortunately, I got detoured filing bugs against GNU as for dwarf-5
bugs, but the developers were very responsive and fixed them all. I
should go find and dust off that patchset. In the meantime, I'll try
to help review these patches. Thank you for sending them.
>
>
>
> Masahiro Yamada (7):
> x86: remove unneeded defined(__ASSEMBLY__) check from asm/dwarf2.h
> x86: remove always-defined CONFIG_AS_CFI
> x86: remove always-defined CONFIG_AS_CFI_SIGNAL_FRAME
> x86: remove always-defined CONFIG_AS_CFI_SECTIONS
> x86: remove always-defined CONFIG_AS_SSSE3
> x86: remove always-defined CONFIG_AS_AVX
> x86: add comments about the binutils version to support code in
> as-instr
>
> arch/x86/Makefile | 21 +++------
> arch/x86/crypto/Makefile | 32 ++++++--------
> arch/x86/crypto/aesni-intel_avx-x86_64.S | 3 --
> arch/x86/crypto/aesni-intel_glue.c | 14 +-----
> arch/x86/crypto/blake2s-core.S | 2 -
> arch/x86/crypto/poly1305-x86_64-cryptogams.pl | 8 ----
> arch/x86/crypto/poly1305_glue.c | 6 +--
> arch/x86/crypto/sha1_ssse3_asm.S | 4 --
> arch/x86/crypto/sha1_ssse3_glue.c | 9 +---
> arch/x86/crypto/sha256-avx-asm.S | 3 --
> arch/x86/crypto/sha256_ssse3_glue.c | 8 +---
> arch/x86/crypto/sha512-avx-asm.S | 2 -
> arch/x86/crypto/sha512_ssse3_glue.c | 7 +--
> arch/x86/include/asm/dwarf2.h | 43 -------------------
> arch/x86/include/asm/xor_avx.h | 9 ----
> lib/raid6/algos.c | 2 -
> lib/raid6/recov_ssse3.c | 6 ---
> lib/raid6/test/Makefile | 3 --
> 18 files changed, 26 insertions(+), 156 deletions(-)
>
> --
> 2.17.1
>
> --
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--
Thanks,
~Nick Desaulniers
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