From patchwork Thu Jun 14 08:48:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 10463645 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 05D83601F9 for ; Thu, 14 Jun 2018 08:49:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EAB882899C for ; Thu, 14 Jun 2018 08:49:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DF62B289A7; Thu, 14 Jun 2018 08:49:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9491D2899C for ; Thu, 14 Jun 2018 08:49:20 +0000 (UTC) Received: from localhost ([::1]:39283 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fTNwV-0006jA-So for patchwork-qemu-devel@patchwork.kernel.org; Thu, 14 Jun 2018 04:49:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41841) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fTNvr-0006NO-Ud for qemu-devel@nongnu.org; Thu, 14 Jun 2018 04:48:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fTNvo-0005MG-Ss for qemu-devel@nongnu.org; Thu, 14 Jun 2018 04:48:40 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:59282 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fTNvo-0005LC-NK; Thu, 14 Jun 2018 04:48:36 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 651E58011059; Thu, 14 Jun 2018 08:48:30 +0000 (UTC) Received: from thh440s.redhat.com (ovpn-116-79.ams2.redhat.com [10.36.116.79]) by smtp.corp.redhat.com (Postfix) with ESMTP id 257A52026DEF; Thu, 14 Jun 2018 08:48:28 +0000 (UTC) From: Thomas Huth To: Christian Borntraeger , qemu-s390x@nongnu.org Date: Thu, 14 Jun 2018 10:48:28 +0200 Message-Id: <1528966108-28324-1-git-send-email-thuth@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Thu, 14 Jun 2018 08:48:30 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.8]); Thu, 14 Jun 2018 08:48:30 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'thuth@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH] pc-bios/s390-ccw: Optimize the s390-ccw bios for size X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cornelia Huck , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Since we're storing the firmware blobs in the QEMU git repository, it would be nice if the blobs would be a little bit smaller. By using -Os and -fno-asynchronous-unwind-tables the size of the s390-ccw.img can be decreased by ca. 4kB, and the size of s390-netboot.img even by ca. 45kB. The change of speed of the firmware should not really matter compared to a binary that has been compiled with -O2 since the firmware still starts very fast. Signed-off-by: Thomas Huth --- pc-bios/s390-ccw/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile index 439e3cc..f22a5ca 100644 --- a/pc-bios/s390-ccw/Makefile +++ b/pc-bios/s390-ccw/Makefile @@ -13,6 +13,7 @@ OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \ virtio.o virtio-scsi.o virtio-blkdev.o libc.o QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) +QEMU_CFLAGS += -Os -fno-asynchronous-unwind-tables QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float QEMU_CFLAGS += -march=z900 -fPIE -fno-strict-aliasing QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector)