From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55469) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fScnW-0002Yy-6E for qemu-devel@nongnu.org; Tue, 12 Jun 2018 02:28:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fScnS-0007z2-1V for qemu-devel@nongnu.org; Tue, 12 Jun 2018 02:28:54 -0400 Received: from mga17.intel.com ([192.55.52.151]:5531) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fScnR-0007y3-PR for qemu-devel@nongnu.org; Tue, 12 Jun 2018 02:28:49 -0400 From: junyan.he@gmx.com Date: Tue, 12 Jun 2018 14:28:17 +0800 Message-Id: <1528784900-7310-5-git-send-email-junyan.he@gmx.com> In-Reply-To: <1528784900-7310-1-git-send-email-junyan.he@gmx.com> References: <1528784900-7310-1-git-send-email-junyan.he@gmx.com> Subject: [Qemu-devel] [PATCH 4/7 V7] configure: add libpmem support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: ehabkost@redhat.com, imammedo@redhat.com, pbonzini@redhat.com, crosthwaite.peter@gmail.com, rth@twiddle.net, xiaoguangrong.eric@gmail.com, mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com, stefanha@redhat.com, Junyan He , Haozhong Zhang From: Junyan He 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/38bfa652721a37fd94c0130ce0e3f5d8baa3ed40/src/libpmem/pmem.c#L33 Signed-off-by: Junyan He Signed-off-by: Haozhong Zhang Reviewed-by: Stefan Hajnoczi --- configure | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/configure b/configure index 14b1113..c49b7b6 100755 --- a/configure +++ b/configure @@ -457,6 +457,7 @@ replication="yes" vxhs="" libxml2="" docker="no" +libpmem="" supported_cpu="no" supported_os="no" @@ -1382,6 +1383,10 @@ for opt do ;; --disable-git-update) git_update=no ;; + --enable-libpmem) libpmem=yes + ;; + --disable-libpmem) libpmem=no + ;; *) echo "ERROR: unknown option $opt" echo "Try '$0 --help' for more information" @@ -1639,6 +1644,7 @@ disabled with --disable-FEATURE, default is enabled if available: crypto-afalg Linux AF_ALG crypto backend driver vhost-user vhost-user support capstone capstone disassembler support + libpmem libpmem support NOTE: The object files are built at the place where configure is launched EOF @@ -5463,6 +5469,24 @@ if has "docker"; then fi ########################################## +# check for libpmem + +if test "$libpmem" != "no"; then + if $pkg_config --exists "libpmem"; then + libpmem="yes" + libpmem_libs=$($pkg_config --libs libpmem) + libpmem_cflags=$($pkg_config --cflags libpmem) + libs_softmmu="$libs_softmmu $libpmem_libs" + QEMU_CFLAGS="$QEMU_CFLAGS $libpmem_cflags" + else + if test "$libpmem" = "yes" ; then + feature_not_found "libpmem" "Install nvml or pmdk" + fi + libpmem="no" + fi +fi + +########################################## # End of CC checks # After here, no more $cc or $ld runs @@ -5926,6 +5950,7 @@ echo "replication support $replication" echo "VxHS block device $vxhs" echo "capstone $capstone" echo "docker $docker" +echo "libpmem support $libpmem" if test "$sdl_too_old" = "yes"; then echo "-> Your SDL version is too old - please upgrade to have SDL support" @@ -6673,6 +6698,10 @@ if test "$vxhs" = "yes" ; then echo "VXHS_LIBS=$vxhs_libs" >> $config_host_mak fi +if test "$libpmem" = "yes" ; then + echo "CONFIG_LIBPMEM=y" >> $config_host_mak +fi + if test "$tcg_interpreter" = "yes"; then QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/tci $QEMU_INCLUDES" elif test "$ARCH" = "sparc64" ; then -- 2.7.4