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[Qemu-devel] [PATCH 4/7 V7] configure: add libpmem support
From: |
junyan . he |
Subject: |
[Qemu-devel] [PATCH 4/7 V7] configure: add libpmem support |
Date: |
Tue, 12 Jun 2018 14:28:17 +0800 |
From: Junyan He <address@hidden>
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 <address@hidden>
Signed-off-by: Haozhong Zhang <address@hidden>
Reviewed-by: Stefan Hajnoczi <address@hidden>
---
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
- [Qemu-devel] [PATCH 0/7 V7] nvdimm: guarantee persistence of QEMU writes to persistent memory, junyan . he, 2018/06/12
- [Qemu-devel] [PATCH 1/7 V7] memory, exec: Expose all memory block related flags., junyan . he, 2018/06/12
- [Qemu-devel] [PATCH 2/7 V7] memory, exec: switch file ram allocation functions to 'flags' parameters, junyan . he, 2018/06/12
- [Qemu-devel] [PATCH 3/7 V7] hostmem-file: add the 'pmem' option, junyan . he, 2018/06/12
- [Qemu-devel] [PATCH 4/7 V7] configure: add libpmem support,
junyan . he <=
- [Qemu-devel] [PATCH 5/7 V7] mem/nvdimm: ensure write persistence to PMEM in label emulation, junyan . he, 2018/06/12
- [Qemu-devel] [PATCH 6/7 V7] migration/ram: Add check and info message to nvdimm post copy., junyan . he, 2018/06/12
- [Qemu-devel] [PATCH 7/7 V7] migration/ram: ensure write persistence on loading all data to PMEM., junyan . he, 2018/06/12