From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40776) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvmOO-0000zg-S4 for qemu-devel@nongnu.org; Fri, 31 Aug 2018 12:35:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fvmOL-0005CS-O4 for qemu-devel@nongnu.org; Fri, 31 Aug 2018 12:35:27 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:39744) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fvmOH-00053K-TS for qemu-devel@nongnu.org; Fri, 31 Aug 2018 12:35:23 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w7VGZ29J140701 for ; Fri, 31 Aug 2018 16:35:16 GMT Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp2120.oracle.com with ESMTP id 2m2yrqvb93-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 31 Aug 2018 16:35:15 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w7VGZALd019790 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 31 Aug 2018 16:35:10 GMT Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w7VGZA7D017616 for ; Fri, 31 Aug 2018 16:35:10 GMT From: Liam Merwick Date: Fri, 31 Aug 2018 17:36:47 +0100 Message-Id: <1535733414-6812-2-git-send-email-Liam.Merwick@oracle.com> In-Reply-To: <1535733414-6812-1-git-send-email-Liam.Merwick@oracle.com> References: <1535733414-6812-1-git-send-email-Liam.Merwick@oracle.com> Subject: [Qemu-devel] [PATCH v2 1/8] configure: Provide option to explicitly disable AVX2 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org The configure script detects if the compiler has AVX2 support and automatically sets avx2_opt="yes" which in turn defines CONFIG_AVX2_OPT. There is no way of explicitly overriding this setting so this commit adds two command-line options: --enable-avx2 and --disable-avx2. The default behaviour, when no option is specified, is to maintain the current behaviour and enable AVX2 if the compiler supports it. Signed-off-by: Liam Merwick Reviewed-by: Darren Kenny Reviewed-by: Mark Kanda --- configure | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/configure b/configure index 58862d2ae88a..8904a91715b3 100755 --- a/configure +++ b/configure @@ -427,7 +427,7 @@ usb_redir="" opengl="" opengl_dmabuf="no" cpuid_h="no" -avx2_opt="no" +avx2_opt="" zlib="yes" capstone="" lzo="" @@ -1332,6 +1332,10 @@ for opt do ;; --disable-glusterfs) glusterfs="no" ;; + --disable-avx2) avx2_opt="no" + ;; + --enable-avx2) avx2_opt="yes" + ;; --enable-glusterfs) glusterfs="yes" ;; --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane) @@ -1709,6 +1713,7 @@ disabled with --disable-FEATURE, default is enabled if available: libxml2 for Parallels image format tcmalloc tcmalloc support jemalloc jemalloc support + avx2 AVX2 optimization support replication replication support vhost-vsock virtio sockets device support opengl opengl support @@ -5127,7 +5132,7 @@ fi # There is no point enabling this if cpuid.h is not usable, # since we won't be able to select the new routines. -if test $cpuid_h = yes; then +if test "$cpuid_h" = "yes" -a "$avx2_opt" != "no"; then cat > $TMPC << EOF #pragma GCC push_options #pragma GCC target("avx2") @@ -5141,6 +5146,8 @@ int main(int argc, char *argv[]) { return bar(argv[0]); } EOF if compile_object "" ; then avx2_opt="yes" + else + avx2_opt="no" fi fi -- 1.8.3.1