From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1327CA04A5; Thu, 18 Jun 2020 13:57:14 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 51AF11BEE0; Thu, 18 Jun 2020 13:57:13 +0200 (CEST) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id E89671BEDF for ; Thu, 18 Jun 2020 13:57:10 +0200 (CEST) IronPort-SDR: neCcxO3Iz8RVUCHEsbGQ0gJZtuIYb3Ui2VYyRnw7KjYizJGUNksdi70w9v6LTly9HCsnGSUSa6 wYzsxobzPM/A== X-IronPort-AV: E=McAfee;i="6000,8403,9655"; a="204037713" X-IronPort-AV: E=Sophos;i="5.73,526,1583222400"; d="scan'208";a="204037713" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jun 2020 04:57:08 -0700 IronPort-SDR: J7Pa6HN+u+BNYlDwGPUJYUceNYRbYUBDututJmN99Q4IbTSK0AtZjqCYosBwUCsx/Yi8yuM3ii MiEgULd8dODQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,526,1583222400"; d="scan'208";a="477211607" Received: from silpixa00399126.ir.intel.com ([10.237.222.84]) by fmsmga005.fm.intel.com with ESMTP; 18 Jun 2020 04:57:06 -0700 From: Bruce Richardson To: dev@dpdk.org Cc: ferruh.yigit@intel.com, thomas@monjalon.net, Bruce Richardson Date: Thu, 18 Jun 2020 12:56:44 +0100 Message-Id: <20200618115644.488930-1-bruce.richardson@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200617104012.470617-1-bruce.richardson@intel.com> References: <20200617104012.470617-1-bruce.richardson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v2] build: check functionality rather than binutils version X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Rather than checking the binutils version number, which can lead to unnecessary disabling of AVX512 if fixes have been backported to distro versions, we can instead check the output of "as" from binutils to see if it is correct. The check in the script uses the minimal assembly reproduction code posted to the public bug tracker for gcc/binutils for those issues [1]. If the binutils bug is present, the instruction parameters - specifically the displacement parameter - will be different in the disassembled output compared to the input. Therefore the check involves assembling a single instruction and disassembling it again, checking that the two match. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90028 Signed-off-by: Bruce Richardson --- V2: - Renamed "as_ok" variable to "binutils_ok" for readability - Removed one test case from the script because even though two DPDK bugs were filed, the one binutils bug is the root cause, and a single commit fixes them both - Changed message() to warning() in the printout --- buildtools/binutils-avx512-check.sh | 16 ++++++++++++++++ buildtools/meson.build | 3 +-- config/x86/meson.build | 10 +++------- meson.build | 5 ++++- 4 files changed, 24 insertions(+), 10 deletions(-) create mode 100755 buildtools/binutils-avx512-check.sh diff --git a/buildtools/binutils-avx512-check.sh b/buildtools/binutils-avx512-check.sh new file mode 100755 index 000000000..cef7b09ed --- /dev/null +++ b/buildtools/binutils-avx512-check.sh @@ -0,0 +1,16 @@ +#! /bin/sh +# SPDX-License-Identifier: BSD-3-Clause +# Copyright(c) 2020 Intel Corporation + +AS=${AS:-as} +MESON_BUILD_ROOT=${MESON_BUILD_ROOT:-/tmp} +OBJFILE=$MESON_BUILD_ROOT/binutils-avx512-check.o +# from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90028 +GATHER_PARAMS='0x8(,%ymm1,1),%ymm0{%k2}' + +# assemble vpgather to file and similarly check +echo "vpgatherqq $GATHER_PARAMS" | $AS --64 -o $OBJFILE - +objdump -d --no-show-raw-insn $OBJFILE | grep -q $GATHER_PARAMS || { + echo "vpgatherqq displacement error with as" + exit 1 +} diff --git a/buildtools/meson.build b/buildtools/meson.build index d5f8291be..73a847c52 100644 --- a/buildtools/meson.build +++ b/buildtools/meson.build @@ -1,13 +1,12 @@ # SPDX-License-Identifier: BSD-3-Clause # Copyright(c) 2017-2019 Intel Corporation -subdir('pmdinfogen') - pkgconf = find_program('pkg-config', 'pkgconf', required: false) pmdinfo = find_program('gen-pmdinfo-cfile.sh') list_dir_globs = find_program('list-dir-globs.py') check_symbols = find_program('check-symbols.sh') ldflags_ibverbs_static = find_program('options-ibverbs-static.sh') +binutils_avx512_check = find_program('binutils-avx512-check.sh') # set up map-to-def script using python, either built-in or external python3 = import('python').find_installation(required: false) diff --git a/config/x86/meson.build b/config/x86/meson.build index adc857ba2..6ec020ef6 100644 --- a/config/x86/meson.build +++ b/config/x86/meson.build @@ -3,14 +3,10 @@ # get binutils version for the workaround of Bug 97 if not is_windows - ldver = run_command('ld', '-v').stdout().strip() - if ldver.contains('2.30') and cc.has_argument('-mno-avx512f') + binutils_ok = run_command(binutils_avx512_check) + if binutils_ok.returncode() != 0 and cc.has_argument('-mno-avx512f') machine_args += '-mno-avx512f' - message('Binutils 2.30 detected, disabling AVX512 support as workaround for bug #97') - endif - if ldver.contains('2.31') and cc.has_argument('-mno-avx512f') - machine_args += '-mno-avx512f' - message('Binutils 2.31 detected, disabling AVX512 support as workaround for bug #249') + warning('Binutils error with AVX512 assembly, disabling AVX512 support') endif endif diff --git a/meson.build b/meson.build index 750fdeab1..ab4d60cfa 100644 --- a/meson.build +++ b/meson.build @@ -41,10 +41,13 @@ global_inc = include_directories('.', 'config', 'lib/librte_eal/@0@/include'.format(host_machine.system()), 'lib/librte_eal/@0@/include'.format(arch_subdir), ) + +# do configuration and get tool paths +subdir('buildtools') subdir('config') # build libs and drivers -subdir('buildtools') +subdir('buildtools/pmdinfogen') subdir('lib') subdir('drivers') -- 2.25.1