See https://github.com/libvirt/libvirt/blob/v5.4.0/src/cpu_map/x86_features.xml#L323 md-clear is there. Reproducible: Always Steps to Reproduce: 1.Start domain Actual Results: error: internal error: CPU feature md-clear already defined Expected Results: domain started cpu definition: <cpu mode='host-model' check='partial'> <model fallback='allow'/> </cpu> /proc/cpuinfo for 1 cpu: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 94 model name : Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz stepping : 3 microcode : 0xcc cpu MHz : 1200.022 cache size : 6144 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 22 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov p at pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtsc p lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc c puid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ss se3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_t imer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault invpcid_sing le pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflusho pt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds bogomips : 7008.00 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management: emerge --info Portage 2.3.68 (python 2.7.16-final-0, default/linux/amd64/17.1/desktop, gcc-9.1.0, glibc-2.29-r2, 5.0.21-gentoo x86_64) ================================================================= System uname: Linux-5.0.21-gentoo-x86_64-Intel-R-_Core-TM-_i5-6600K_CPU_@_3.50GHz-with-gentoo-2.6 KiB Mem: 32692572 total, 14488804 free KiB Swap: 2097148 total, 2097148 free Timestamp of repository gentoo: Mon, 01 Jul 2019 16:15:01 +0000 Head commit of repository gentoo: 1334db62de7bc2f092820f11a63146f8394f367a sh bash 5.0_p7 ld GNU ld (Gentoo 2.32 p2) 2.32.0 app-shells/bash: 5.0_p7::gentoo dev-java/java-config: 2.2.0-r4::gentoo dev-lang/perl: 5.28.2-r1::gentoo dev-lang/python: 2.7.16::gentoo, 3.6.8::gentoo, 3.7.3::gentoo dev-util/cmake: 3.14.5::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.6-r1::gentoo sys-apps/openrc: 0.41.2::gentoo sys-apps/sandbox: 2.17::gentoo sys-devel/autoconf: 2.13-r1::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.16.1-r1::gentoo sys-devel/binutils: 2.32-r1::gentoo sys-devel/gcc: 9.1.0-r1::gentoo sys-devel/gcc-config: 2.0::gentoo sys-devel/libtool: 2.4.6-r5::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 5.1::gentoo (virtual/os-headers) sys-libs/glibc: 2.29-r2::gentoo Repositories: gentoo location: /usr/portage sync-type: rsync sync-uri: rsync://rsync.us.gentoo.org/gentoo-portage/ priority: -1000 sync-rsync-verify-jobs: 1 sync-rsync-verify-metamanifest: yes sync-rsync-extra-opts: sync-rsync-verify-max-age: 24 lanfear location: /home/mark/project/portage masters: gentoo priority: 0 Installed sets: @system ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/easy-rsa /usr/share/gnupg/quali fied.txt /var/bind /var/lib/unifi" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/f onts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.6/ext-active/ /etc /php/apache2-php7.3/ext-active/ /etc/php/cgi-php5.6/ext-active/ /etc/php/cgi-php7 .3/ext-active/ /etc/php/cli-php5.6/ext-active/ /etc/php/cli-php7.3/ext-active/ /e tc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/tex mf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN PERL5LIB PERL5OPT PERLPREFIX PE RL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DAT A_HOME XDG_RUNTIME_DIR" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs collision-p rotect config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox m erge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserv e-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs un merge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://gentoo.osuosl.org/" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="en" MAKEOPTS="-j5" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-t imes --compress --force --whole-file --delete --stats --human-readable --timeout= 180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" USE="3dnowex X Xaw3d a52 aac aalib acl acpi aim alsa amd64 apache apache2 audiofile bash-completion berkdb bluetooth branding bzip2 bzlib cairo cdparanoia cdr cgi cli consolekit crypt cups curl cxx dbus device-mapper dga divx4linux dri dts dvd dvdr dvdread dynagraph edl emacs emboss encode esd ethereal exif ffmpeg fftw fla c font-server fontconfig fpx gd gdbm geoip gif gimp glamor glibc-omitfp gmp gpgme graphviz gs gstreamer gtk gtkhtml hal iconv icq idea imagemagick imap innodb ipv 6 java jbig jikes jpeg latex lcms libcaca libnotify libtirpc lm_sensors logrotate lua lzw-tiff mad maildrop mailwrapper matroska mbox milter mmap mmx mmxext mng m ozdevelop mozilla moznocompose moznoirc moznomail mozsvg mp3 mp4 mpeg multilib mu sepack mysql ncurses nethack netpbm nls nptl nptlonly nsplugin offensive ogg open gl openmp pam pam_chroot pam_console pam_timestamp pango pcre pda pdf perlsuid pi c plotutils png policykit postgres ppds qt5 readline real rtc samba sdl seccomp s ensord silc slp smime sndfile snmp speex spell sqlite sse sse2 sse3 sse4_1 ssl ss se3 startup-notification svg syslog tcltk tcpd tga theora tiff truetype truetype- fonts trusted type1-fonts udev udisks unicode upower usb userlocales vhosts video s vorbis vorbis-psy w win32codecs wmf wxwidgets x264 xanim xattr xcb xml xpm xran dr xv xvid zip zlib" ABI_X86="64" ALSA_CARDS="hda_intel" APACHE2_MODULES="actions alias auth_basic auth_digest authn_anon authn_dbd authn_dbm authn_default authn_ file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user au toindex cache cgi dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_ filter file_cache filter headers ident imagemap include info log_config logio mem _cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect p roxy_http rewrite setenvif so speling status unique_id userdir usertrack vhost_al ias slotmem_shm authn_core authz_core socache_shmcb access_compat dir_module" CAL LIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memo ry rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2 sse3 sse4_1 ssse3" ELI BC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm1 04v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_ DEVICES="evdev" KERNEL="linux" L10N="en" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-con sole presenter-minimizer" NETBEANS_MODULES="apisupport cnd groovy gsf harness ide identity j2ee java mobility nb php profiler soa visualweb webcommon websvccommon xml" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-3" POSTGRES_TARGETS=" postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_6" PYTHON_TARGETS="python2_7 python3_6 python3_7" RUBY_TARGETS="ruby24 ruby25" USERLAND="GNU" VIDEO_CARDS="no uveau" XTABLES_ADDONS="geoip" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_A LL, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_ FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Can confirm. Although I haven't tested it without the patch applied, but I get "libvirtd[4744]: internal error: CPU feature md-clear already defined"
Shoot, I forgot to push the fix from yesterday evening... 5.4.0-r1 should be fine.
