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configure: add libdaxctl support

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Add a pair of configure options --{enable,disable}-libdaxctl to control
whether QEMU is compiled with libdaxctl [1]. Libdaxctl is a utility
library for managing the device dax subsystem.

QEMU uses mmap(2) to maps vNVDIMM backends and aligns the mapping
address to the page size (getpagesize(2)) by default. However, some
types of backends may require an alignment different than the page
size. The 'align' option is provided to memory-backend-file to allow
users to specify the proper alignment.

For device dax (e.g., /dev/dax0.0), the 'align' option needs to match
the alignment requirement of the device dax, which can be fetched
through the APIs of libdaxctl version 57 or up.

[1] Libdaxctl is a part of ndctl project.
The project's repository is: https://github.com/pmem/ndctl

For more information about libdaxctl APIs, you can refer to the
comments in source code of: pmem/ndctl/daxctl/lib/libdaxctl.c.

Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Jingqi Liu <jingqi.liu@intel.com>
Message-Id: <20200429085011.63752-4-jingqi.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jingqi Liu 2020-04-29 16:50:11 +08:00 committed by Paolo Bonzini
parent 677a3baba4
commit 21b2eca6fc
1 changed files with 29 additions and 0 deletions
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29
configure vendored
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@ -517,6 +517,7 @@ plugins="no"
fuzzing="no"
rng_none="no"
secret_keyring=""
libdaxctl=""
supported_cpu="no"
supported_os="no"
@ -1621,6 +1622,10 @@ for opt do
;;
--disable-keyring) secret_keyring="no"
;;
--enable-libdaxctl) libdaxctl=yes
;;
--disable-libdaxctl) libdaxctl=no
;;
*)
echo "ERROR: unknown option $opt"
echo "Try '$0 --help' for more information"
@ -1920,6 +1925,7 @@ disabled with --disable-FEATURE, default is enabled if available:
libpmem libpmem support
xkbcommon xkbcommon support
rng-none dummy RNG, avoid using /dev/(u)random and getrandom()
libdaxctl libdaxctl support
NOTE: The object files are built at the place where configure is launched
EOF
@ -6292,6 +6298,24 @@ if test "$libpmem" != "no"; then
fi
fi
##########################################
# check for libdaxctl
if test "$libdaxctl" != "no"; then
if $pkg_config --atleast-version=57 "libdaxctl"; then
libdaxctl="yes"
libdaxctl_libs=$($pkg_config --libs libdaxctl)
libdaxctl_cflags=$($pkg_config --cflags libdaxctl)
libs_softmmu="$libs_softmmu $libdaxctl_libs"
QEMU_CFLAGS="$QEMU_CFLAGS $libdaxctl_cflags"
else
if test "$libdaxctl" = "yes" ; then
feature_not_found "libdaxctl" "Install libdaxctl"
fi
libdaxctl="no"
fi
fi
##########################################
# check for slirp
@ -6898,6 +6922,7 @@ echo "parallels support $parallels"
echo "sheepdog support $sheepdog"
echo "capstone $capstone"
echo "libpmem support $libpmem"
echo "libdaxctl support $libdaxctl"
echo "libudev $libudev"
echo "default devices $default_devices"
echo "plugin support $plugins"
@ -7731,6 +7756,10 @@ if test "$libpmem" = "yes" ; then
echo "CONFIG_LIBPMEM=y" >> $config_host_mak
fi
if test "$libdaxctl" = "yes" ; then
echo "CONFIG_LIBDAXCTL=y" >> $config_host_mak
fi
if test "$bochs" = "yes" ; then
echo "CONFIG_BOCHS=y" >> $config_host_mak
fi