From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33039) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a8qdG-0004mJ-OQ for qemu-devel@nongnu.org; Tue, 15 Dec 2015 09:31:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a8qdD-00066b-EC for qemu-devel@nongnu.org; Tue, 15 Dec 2015 09:31:14 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35551) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a8qdD-00066W-2C for qemu-devel@nongnu.org; Tue, 15 Dec 2015 09:31:11 -0500 References: <1450082498-27109-1-git-send-email-a.rigo@virtualopensystems.com> <1450082498-27109-7-git-send-email-a.rigo@virtualopensystems.com> <566E9685.4030606@redhat.com> From: Paolo Bonzini Message-ID: <56702428.9040603@redhat.com> Date: Tue, 15 Dec 2015 15:31:04 +0100 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RFC v6 06/14] 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: alvise rigo , Laurent Vivier Cc: mttcg@greensocs.com, Claudio Fontana , QEMU Developers , Jani Kokkonen , VirtualOpenSystems Technical Team , =?UTF-8?Q?Alex_Benn=c3=a9e?= , Richard Henderson On 15/12/2015 15:23, alvise rigo wrote: > Hi, > > On Mon, Dec 14, 2015 at 11:14 AM, Laurent Vivier wrote: >> >> >> On 14/12/2015 09:41, Alvise Rigo wrote: >>> 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 | 4 ++++ >>> 1 file changed, 4 insertions(+) >>> >>> diff --git a/configure b/configure >>> index b9552fd..cc3891a 100755 >>> --- a/configure >>> +++ b/configure >>> @@ -4794,6 +4794,7 @@ echo "Install blobs $blobs" >>> echo "KVM support $kvm" >>> echo "RDMA support $rdma" >>> echo "TCG interpreter $tcg_interpreter" >>> +echo "use ld/st excl $softmmu" >>> echo "fdt support $fdt" >>> echo "preadv support $preadv" >>> echo "fdatasync $fdatasync" >>> @@ -5186,6 +5187,9 @@ fi >>> if test "$tcg_interpreter" = "yes" ; then >>> echo "CONFIG_TCG_INTERPRETER=y" >> $config_host_mak >>> fi >>> +if test "$softmmu" = "yes" ; then >>> + echo "CONFIG_TCG_USE_LDST_EXCL=y" >> $config_host_mak >>> +fi >> >> why is this "$softmmu" and not "$target_softmmu" ? > > I see now that is $target_softmmu setting CONFIG_SOFTMMU=y. > So for my understanding, which are the cases where $softmmu is set > while $target_softmmu is not? When compiling foo-linux-user. Paolo