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From 3ac4a8eb45ad35ff759a76233e9437566041dba0 Mon Sep 17 00:00:00 2001
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From: "plai@redhat.com" <plai@redhat.com>
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Date: Mon, 7 Jan 2019 17:02:18 +0000
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Subject: [PATCH 17/22] configure: add libpmem support
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RH-Author: plai@redhat.com
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Message-id: <1546880543-24860-6-git-send-email-plai@redhat.com>
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Patchwork-id: 83890
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O-Subject: [RHEL8.0 qemu-kvm PATCH v7 05/10] configure: add libpmem support
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Bugzilla: 1539285
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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From: Junyan He <junyan.he@intel.com>
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Add a pair of configure options --{enable,disable}-libpmem to control
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whether QEMU is compiled with PMDK libpmem [1].
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QEMU may write to the host persistent memory (e.g. in vNVDIMM label
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emulation and live migration), so it must take the proper operations
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to ensure the persistence of its own writes. Depending on the CPU
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models and available instructions, the optimal operation can vary [2].
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PMDK libpmem have already implemented those operations on multiple CPU
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models (x86 and ARM) and the logic to select the optimal ones, so QEMU
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can just use libpmem rather than re-implement them.
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Libpem is a part of PMDK project(formerly known as NMVL).
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The project's home page is: http://pmem.io/pmdk/
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And the project's repository is: https://github.com/pmem/pmdk/
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For more information about libpmem APIs, you can refer to the comments
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in source code of: pmdk/src/libpmem/pmem.c, begin at line 33.
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Signed-off-by: Junyan He <junyan.he@intel.com>
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Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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Reviewed-by: Igor Mammedov <imammedo@redhat.com>
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Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 17824406fa55b303379f2e4af715c1e876c3535f)
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Signed-off-by: Paul Lai <plai@redhat.com>
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Resolved Conflicts:
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configure
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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configure | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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diff --git a/configure b/configure
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index 139f3c8..858b456 100755
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--- a/configure
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+++ b/configure
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@@ -461,6 +461,7 @@ parallels="yes"
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sheepdog="yes"
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libxml2=""
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libudev="no"
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+libpmem=""
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supported_cpu="no"
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supported_os="no"
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@@ -1421,6 +1422,10 @@ for opt do
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;;
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--disable-git-update) git_update=no
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;;
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+ --enable-libpmem) libpmem=yes
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+ ;;
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+ --disable-libpmem) libpmem=no
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+ ;;
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*)
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echo "ERROR: unknown option $opt"
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echo "Try '$0 --help' for more information"
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@@ -1687,6 +1692,7 @@ disabled with --disable-FEATURE, default is enabled if available:
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crypto-afalg Linux AF_ALG crypto backend driver
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vhost-user vhost-user support
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capstone capstone disassembler support
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+ libpmem libpmem support
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NOTE: The object files are built at the place where configure is launched
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EOF
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@@ -5458,6 +5464,24 @@ EOF
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fi
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##########################################
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+# check for libpmem
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+
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+if test "$libpmem" != "no"; then
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+ if $pkg_config --exists "libpmem"; then
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+ libpmem="yes"
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+ libpmem_libs=$($pkg_config --libs libpmem)
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+ libpmem_cflags=$($pkg_config --cflags libpmem)
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+ libs_softmmu="$libs_softmmu $libpmem_libs"
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+ QEMU_CFLAGS="$QEMU_CFLAGS $libpmem_cflags"
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+ else
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+ if test "$libpmem" = "yes" ; then
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+ feature_not_found "libpmem" "Install nvml or pmdk"
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+ fi
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+ libpmem="no"
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+ fi
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+fi
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+
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+##########################################
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# End of CC checks
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# After here, no more $cc or $ld runs
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@@ -5939,6 +5963,7 @@ echo "parallels support $parallels"
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echo "sheepdog support $sheepdog"
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echo "capstone $capstone"
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echo "libudev $libudev"
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+echo "libpmem support $libpmem"
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if test "$sdl_too_old" = "yes"; then
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echo "-> Your SDL version is too old - please upgrade to have SDL support"
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@@ -6714,6 +6739,10 @@ if test "$sheepdog" = "yes" ; then
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echo "CONFIG_SHEEPDOG=y" >> $config_host_mak
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fi
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+if test "$libpmem" = "yes" ; then
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+ echo "CONFIG_LIBPMEM=y" >> $config_host_mak
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+fi
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+
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if test "$tcg_interpreter" = "yes"; then
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QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/tci $QEMU_INCLUDES"
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elif test "$ARCH" = "sparc64" ; then
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--
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1.8.3.1
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