Public bug reported: Specific package version qemu-system-x86==1:2.8+dfsg-3ubuntu2.9~cloud6
Upgrading to Ocata from Newton on Xenial results in a significant upgrade to libvirt (1.3.1 -> 2.5) and qemu (2.5 -> 2.8) Instances created in Newton have access to the SSBD CPU flag in QEMU, however after the upgrade this feature is reported as missing, meaning that live-migrations are not possible. The libvirt 2.5 package depends on QEMU >= 2.8 The SSBD patch looks to have been applied upstream, but does not seem to have made it in here: https://launchpad.net/debian/+source/qemu/1:2.8+dfsg-6+deb9u5 Upgraded host output ==== virsh version Compiled against library: libvirt 2.5.0 Using library: libvirt 2.5.0 Using API: QEMU 2.5.0 Running hypervisor: QEMU 2.8.0 qemu-system-x86_64 -cpu help | tail -20 Recognized CPUID flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 pn clflush ds acpi mmx fxsr sse sse2 ss ht tm ia64 pbe pni pclmulqdq dtes64 monitor ds-cpl vmx smx est tm2 ssse3 cid fma cx16 xtpr pdcm pcid dca sse4.1 sse4.2 x2apic movbe popcnt tsc-deadline aes xsave osxsave avx f16c rdrand hypervisor fsgsbase tsc-adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap avx512ifma pcommit clflushopt clwb avx512pf avx512er avx512cd avx512bw avx512vl avx512vbmi umip pku ospke rdpid avx512-4vnniw avx512-4fmaps md-clear spec-ctrl syscall nx mmxext fxsr-opt pdpe1gb rdtscp lm 3dnowext 3dnow lahf-lm cmp-legacy svm extapic cr8legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid-msr tbm topoext perfctr-core perfctr-nb invtsc ibpb xstore xstore-en xcrypt xcrypt-en ace2 ace2-en phe phe-en pmm pmm-en kvmclock kvm-nopiodelay kvm-mmu kvmclock kvm-asyncpf kvm-steal-time kvm-pv-eoi kvm-pv-unhalt kvmclock-stable-bit npt lbrv svm-lock nrip-save tsc-scale vmcb-clean flushbyasid decodeassists pause-filter pfthreshold xsaveopt xsavec xgetbv1 xsaves arat Pre upgrade version: ==== virsh version Compiled against library: libvirt 1.3.1 Using library: libvirt 1.3.1 Using API: QEMU 1.3.1 Running hypervisor: QEMU 2.5.0 qemu-system-x86_64 -cpu help | tail -20 x86 Opteron_G3 AMD Opteron 23xx (Gen 3 Class Opteron) x86 Opteron_G4 AMD Opteron 62xx class CPU x86 Opteron_G5 AMD Opteron 63xx class CPU x86 host KVM processor with all supported host features (only available in KVM mode) Recognized CPUID flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 pn clflush ds acpi mmx fxsr sse sse2 ss ht tm ia64 pbe pni|sse3 pclmulqdq|pclmuldq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cid fma cx16 xtpr pdcm pcid dca sse4.1|sse4_1 sse4.2|sse4_2 x2apic movbe popcnt tsc-deadline aes xsave osxsave avx f16c rdrand hypervisor fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f rdseed adx smap pcommit clflushopt clwb avx512pf avx512er avx512cd md-clear spec-ctrl ssbd syscall nx|xd mmxext fxsr_opt|ffxsr pdpe1gb rdtscp lm|i64 3dnowext 3dnow lahf_lm cmp_legacy svm extapic cr8legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb invtsc ibpb virt-ssbd xstore xstore-en xcrypt xcrypt-en ace2 ace2-en phe phe-en pmm pmm-en kvmclock kvm_nopiodelay kvm_mmu kvmclock kvm_asyncpf kvm_steal_time kvm_pv_eoi kvm_pv_unhalt kvmclock-stable-bit npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pause_filter pfthreshold xsaveopt xsavec xgetbv1 xsaves arat For the time being I am working around this problem by pinning libvirt and qemu at the older versions provided by xenial repositories, as they are within the versions for Ocata listed here https://wiki.openstack.org/wiki/LibvirtDistroSupportMatrix ** Affects: qemu (Ubuntu) Importance: Undecided Status: Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846501 Title: qemu-system-x86 missing ssbd flag in UCA Ocata To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1846501/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
