From patchwork Tue Mar 24 08:48:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11454861 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6019B139A for ; Tue, 24 Mar 2020 08:51:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 43CA4208D5 for ; Tue, 24 Mar 2020 08:51:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585039899; bh=XP2txLbqU1idKy32wWuardHR/llWS+Cx9bGBnAL2L4k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AzbytsiOV4nPfHtDuOi/SRuosn/0jcbiQuTqA6H+LBTnPtYMESfGB9ns6XjmSbsVJ tV0Uj8/OoepppMnBpVRebp0g8FWe3hCIOBF9vqV5T9qrXEAf74+d30nAen3iNACkSN +EWdAmAxSYAtjPBoR+xSP3m+DbSxP+H9nIr56UqE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727501AbgCXIvi (ORCPT ); Tue, 24 Mar 2020 04:51:38 -0400 Received: from conuserg-09.nifty.com ([210.131.2.76]:17988 "EHLO conuserg-09.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727467AbgCXIve (ORCPT ); Tue, 24 Mar 2020 04:51:34 -0400 Received: from pug.e01.socionext.com (p14092-ipngnfx01kyoto.kyoto.ocn.ne.jp [153.142.97.92]) (authenticated) by conuserg-09.nifty.com with ESMTP id 02O8mgsi011219; Tue, 24 Mar 2020 17:48:57 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-09.nifty.com 02O8mgsi011219 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1585039738; bh=JqtixBVE5LvKs0Tzf5JjzcEl4PHKG6BuoyaSQFvvj58=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VT7u0p7jFX8rcAUgYEMLvfDun1br1MHBhbeua/d+C+39d4WsxGHO76aT3w95RqiNk 7xw79J9Q8VThK+U0QGRwUovrbUbWBLwp7ocgOirKqBVBG54afPcz62tZMTHYQuPZsi WA/uA/+aHULGz9ptJNxGcIzBMMBkwPU7m360SCPMJsm9YAg46rOsnqgnFnnxQtpBYi MLghhO2/qsDEzoll1AmUXrCPFmz8I9MoSYWBWG/3YidFnHa1ZClqVlpGdy7PcrT0h5 bLc21XxTv7MvSU4yXYXWRAy+GE6Kr8lJnv7FvUjm0NegsqhJudnvGPdLutlLehQPMy Utz983OFQpHGw== X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: linux-kernel@vger.kernel.org Cc: "David S . Miller" , Linus Torvalds , Kees Cook , clang-built-linux@googlegroups.com, Herbert Xu , linux-crypto@vger.kernel.org, Ingo Molnar , Thomas Gleixner , Borislav Petkov , Peter Zijlstra , "H . Peter Anvin" , x86@kernel.org, linux-kbuild@vger.kernel.org, "Jason A. Donenfeld" , Masahiro Yamada Subject: [PATCH 11/16] x86: probe assembler capabilities via kconfig instead of makefile Date: Tue, 24 Mar 2020 17:48:16 +0900 Message-Id: <20200324084821.29944-12-masahiroy@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200324084821.29944-1-masahiroy@kernel.org> References: <20200324084821.29944-1-masahiroy@kernel.org> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: "Jason A. Donenfeld" Doing this probing inside of the Makefiles means we have a maze of ifdefs inside the source code and child Makefiles that need to make proper decisions on this too. Instead, we do it at Kconfig time, like many other compiler and assembler options, which allows us to set up the dependencies normally for full compilation units. In the process, the ADX test changes to use %eax instead of %r10 so that it's valid in both 32-bit and 64-bit mode. Signed-off-by: Jason A. Donenfeld Signed-off-by: Masahiro Yamada --- arch/x86/Kconfig | 2 ++ arch/x86/Kconfig.assembler | 22 ++++++++++++++++++++++ arch/x86/Makefile | 15 --------------- 3 files changed, 24 insertions(+), 15 deletions(-) create mode 100644 arch/x86/Kconfig.assembler diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index beea77046f9b..707673227837 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2935,3 +2935,5 @@ config HAVE_ATOMIC_IOMAP source "drivers/firmware/Kconfig" source "arch/x86/kvm/Kconfig" + +source "arch/x86/Kconfig.assembler" diff --git a/arch/x86/Kconfig.assembler b/arch/x86/Kconfig.assembler new file mode 100644 index 000000000000..46868ec7b723 --- /dev/null +++ b/arch/x86/Kconfig.assembler @@ -0,0 +1,22 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2020 Jason A. Donenfeld . All Rights Reserved. + +# binutils >= 2.22 +config AS_AVX2 + def_bool $(as-instr,vpbroadcastb %xmm0$(comma)%ymm1) + +# binutils >= 2.25 +config AS_AVX512 + def_bool $(as-instr,vpmovm2b %k1$(comma)%zmm5) + +# binutils >= 2.24 +config AS_SHA1_NI + def_bool $(as-instr,sha1msg1 %xmm0$(comma)%xmm1) + +# binutils >= 2.24 +config AS_SHA256_NI + def_bool $(as-instr,sha256msg1 %xmm0$(comma)%xmm1) + +# binutils >= 2.23 +config AS_ADX + def_bool $(as-instr,adox %eax$(comma)%eax) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 4c57cb3018fb..b65ec63c7db7 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -177,21 +177,6 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) endif -# does binutils support specific instructions? -# binutils >= 2.22 -avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) -# binutils >= 2.25 -avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1) -# binutils >= 2.24 -sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=1) -# binutils >= 2.24 -sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1) -# binutils >= 2.23 -adx_instr := $(call as-instr,adox %r10$(comma)%r10,-DCONFIG_AS_ADX=1) - -KBUILD_AFLAGS += $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) -KBUILD_CFLAGS += $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr) - KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) #