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[Qemu-devel] [PATCH V6 4/7] configure: add libpmem support
From: |
junyan . he |
Subject: |
[Qemu-devel] [PATCH V6 4/7] configure: add libpmem support |
Date: |
Fri, 1 Jun 2018 16:10:26 +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>
---
configure | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/configure b/configure
index a6a4616..f44d669 100755
--- a/configure
+++ b/configure
@@ -456,6 +456,7 @@ jemalloc="no"
replication="yes"
vxhs=""
libxml2=""
+libpmem=""
supported_cpu="no"
supported_os="no"
@@ -1381,6 +1382,10 @@ for opt do
;;
--disable-git-update) git_update=no
;;
+ --enable-libpmem) libpmem=yes
+ ;;
+ --disable-libpmem) libpmem=no
+ ;;
*)
echo "ERROR: unknown option $opt"
echo "Try '$0 --help' for more information"
@@ -1638,6 +1643,7 @@ disabled with --disable-FEATURE, default is enabled if
available:
crypto-afalg Linux AF_ALG crypto backend driver
vhost-user vhost-user support
capstone capstone disassembler support
+ libpmem libpmem support
NOTE: The object files are built at the place where configure is launched
EOF
@@ -5445,6 +5451,24 @@ EOF
fi
##########################################
+# check for libpmem
+
+if test "$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
@@ -5907,6 +5931,7 @@ echo "avx2 optimization $avx2_opt"
echo "replication support $replication"
echo "VxHS block device $vxhs"
echo "capstone $capstone"
+echo "libpmem support $libpmem"
if test "$sdl_too_old" = "yes"; then
echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -6651,6 +6676,10 @@ 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 V6 0/7] nvdimm: guarantee persistence of QEMU writes to persistent memory, junyan . he, 2018/06/01
- [Qemu-devel] [PATCH V6 1/7] memory, exec: Expose all memory block related flags., junyan . he, 2018/06/01
- [Qemu-devel] [PATCH V6 2/7] memory, exec: switch file ram allocation functions to 'flags' parameters, junyan . he, 2018/06/01
- [Qemu-devel] [PATCH V6 3/7] hostmem-file: add the 'pmem' option, junyan . he, 2018/06/01
- [Qemu-devel] [PATCH V6 4/7] configure: add libpmem support,
junyan . he <=
- [Qemu-devel] [PATCH V6 5/7] mem/nvdimm: ensure write persistence to PMEM in label emulation, junyan . he, 2018/06/01
- [Qemu-devel] [PATCH V6 6/7] migration/ram: Add check and info message to nvdimm post copy., junyan . he, 2018/06/01
- [Qemu-devel] [PATCH V6 7/7] migration/ram: ensure write persistence on loading all data to PMEM., junyan . he, 2018/06/01
- Re: [Qemu-devel] [PATCH V6 0/7] nvdimm: guarantee persistence of QEMU writes to persistent memory, no-reply, 2018/06/01