From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52082) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zf1u2-0004r9-RI for qemu-devel@nongnu.org; Thu, 24 Sep 2015 04:29:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zf1ty-0007XO-Q4 for qemu-devel@nongnu.org; Thu, 24 Sep 2015 04:29:18 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:37199) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zf1ty-0007XD-Kk for qemu-devel@nongnu.org; Thu, 24 Sep 2015 04:29:14 -0400 Received: by wicfx3 with SMTP id fx3so102110574wic.0 for ; Thu, 24 Sep 2015 01:29:14 -0700 (PDT) From: Alvise Rigo Date: Thu, 24 Sep 2015 10:32:45 +0200 Message-Id: <1443083566-10994-6-git-send-email-a.rigo@virtualopensystems.com> In-Reply-To: <1443083566-10994-1-git-send-email-a.rigo@virtualopensystems.com> References: <1443083566-10994-1-git-send-email-a.rigo@virtualopensystems.com> Subject: [Qemu-devel] [RFC v5 5/6] configure: Use slow-path for atomic only when the softmmu is enabled List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, mttcg@listserver.greensocs.com Cc: alex.bennee@linaro.org, jani.kokkonen@huawei.com, tech@virtualopensystems.com, claudio.fontana@huawei.com, pbonzini@redhat.com Use the new slow path for atomic instruction translation when the softmmu is enabled. Suggested-by: Jani Kokkonen Suggested-by: Claudio Fontana Signed-off-by: Alvise Rigo --- configure | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/configure b/configure index cd219d8..5f72977 100755 --- a/configure +++ b/configure @@ -1391,6 +1391,13 @@ if test "$ARCH" = "unknown"; then fi fi +# Use the slow-path for atomic instructions if the softmmu is enabled +if test "$softmmu" = "yes"; then + tcg_use_ldst_excl="yes" +else + tcg_use_ldst_excl="no" +fi + # Consult white-list to determine whether to enable werror # by default. Only enable by default for git builds z_version=`cut -f3 -d. $source_path/VERSION` @@ -4542,6 +4549,7 @@ echo "Install blobs $blobs" echo "KVM support $kvm" echo "RDMA support $rdma" echo "TCG interpreter $tcg_interpreter" +echo "use ld/st excl $tcg_use_ldst_excl" echo "fdt support $fdt" echo "preadv support $preadv" echo "fdatasync $fdatasync" @@ -4920,6 +4928,9 @@ fi if test "$tcg_interpreter" = "yes" ; then echo "CONFIG_TCG_INTERPRETER=y" >> $config_host_mak fi +if test "$tcg_use_ldst_excl" = "yes" ; then + echo "CONFIG_TCG_USE_LDST_EXCL=y" >> $config_host_mak +fi if test "$fdatasync" = "yes" ; then echo "CONFIG_FDATASYNC=y" >> $config_host_mak fi -- 2.5.3