From nobody Fri Oct 24 20:18:49 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1519803052984622.3646457924231; Tue, 27 Feb 2018 23:30:52 -0800 (PST) Received: from localhost ([::1]:42631 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eqwCR-00081v-PB for importer@patchew.org; Wed, 28 Feb 2018 02:30:51 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55226) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eqw89-0004cH-0f for qemu-devel@nongnu.org; Wed, 28 Feb 2018 02:26:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eqw87-0000Ic-Qa for qemu-devel@nongnu.org; Wed, 28 Feb 2018 02:26:25 -0500 Received: from mga02.intel.com ([134.134.136.20]:30637) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eqw87-0000CT-GW for qemu-devel@nongnu.org; Wed, 28 Feb 2018 02:26:23 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Feb 2018 23:26:23 -0800 Received: from hz-desktop.sh.intel.com (HELO localhost) ([10.239.13.35]) by orsmga001.jf.intel.com with ESMTP; 27 Feb 2018 23:26:21 -0800 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,404,1515484800"; d="scan'208";a="34718492" From: Haozhong Zhang To: qemu-devel@nongnu.org Date: Wed, 28 Feb 2018 15:25:53 +0800 Message-Id: <20180228072558.7434-4-haozhong.zhang@intel.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180228072558.7434-1-haozhong.zhang@intel.com> References: <20180228072558.7434-1-haozhong.zhang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.20 Subject: [Qemu-devel] [PATCH v4 3/8] configure: add libpmem support 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: Haozhong Zhang , Xiao Guangrong , mst@redhat.com, Juan Quintela , dgilbert@redhat.com, Stefan Hajnoczi , Paolo Bonzini , Igor Mammedov , Dan Williams , Eduardo Habkost Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add a pair of configure options --{enable,disable}-libpmem to control whether QEMU is compiled with PMDK libpmem [1]. QEMU may write to the host persistent memory (e.g. in vNVDIMM label emulation and live migration), so it must take the proper operations to ensure the persistence of its own writes. Depending on the CPU models and available instructions, the optimal operation can vary [2]. PMDK libpmem have already implemented those operations on multiple CPU models (x86 and ARM) and the logic to select the optimal ones, so QEMU can just use libpmem rather than re-implement them. [1] PMDK (formerly known as NMVL), https://github.com/pmem/pmdk/ [2] https://github.com/pmem/pmdk/blob/38bfa652721a37fd94c0130ce0e3f5d8baa3e= d40/src/libpmem/pmem.c#L33 Signed-off-by: Haozhong Zhang --- configure | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/configure b/configure index 39f3a43001..78e10f6d6d 100755 --- a/configure +++ b/configure @@ -450,6 +450,7 @@ jemalloc=3D"no" replication=3D"yes" vxhs=3D"" libxml2=3D"" +libpmem=3D"" =20 supported_cpu=3D"no" supported_os=3D"no" @@ -1360,6 +1361,10 @@ for opt do ;; --disable-git-update) git_update=3Dno ;; + --enable-libpmem) libpmem=3Dyes + ;; + --disable-libpmem) libpmem=3Dno + ;; *) echo "ERROR: unknown option $opt" echo "Try '$0 --help' for more information" @@ -1612,6 +1617,7 @@ disabled with --disable-FEATURE, default is enabled i= f available: crypto-afalg Linux AF_ALG crypto backend driver vhost-user vhost-user support capstone capstone disassembler support + libpmem libpmem support =20 NOTE: The object files are built at the place where configure is launched EOF @@ -5347,6 +5353,30 @@ EOF fi fi =20 +########################################## +# check for libpmem + +if test "$libpmem" !=3D "no"; then + cat > $TMPC < +int main(void) +{ + pmem_is_pmem(0, 0); + return 0; +} +EOF + libpmem_libs=3D"-lpmem" + if compile_prog "" "$libpmem_libs" ; then + libs_softmmu=3D"$libpmem_libs $libs_softmmu" + libpmem=3D"yes" + else + if test "$libpmem" =3D "yes" ; then + feature_not_found "libpmem" "Install nvml or pmdk" + fi + libpmem=3D"no" + fi +fi + ########################################## # End of CC checks # After here, no more $cc or $ld runs @@ -5817,6 +5847,7 @@ echo "avx2 optimization $avx2_opt" echo "replication support $replication" echo "VxHS block device $vxhs" echo "capstone $capstone" +echo "libpmem support $libpmem" =20 if test "$sdl_too_old" =3D "yes"; then echo "-> Your SDL version is too old - please upgrade to have SDL support" @@ -6542,6 +6573,10 @@ if test "$vxhs" =3D "yes" ; then echo "VXHS_LIBS=3D$vxhs_libs" >> $config_host_mak fi =20 +if test "$libpmem" =3D "yes" ; then + echo "CONFIG_LIBPMEM=3Dy" >> $config_host_mak +fi + if test "$tcg_interpreter" =3D "yes"; then QEMU_INCLUDES=3D"-I\$(SRC_PATH)/tcg/tci $QEMU_INCLUDES" elif test "$ARCH" =3D "sparc64" ; then --=20 2.14.1