Re: [libvirt PATCH 00/12] Add vmx-* features from qemu

On Wed, Jan 24, 2024 at 22:19:56 -0500, Sergio Durigan Junior wrote: > On Monday, January 22 2024, I wrote: > > > On Wednesday, November 22 2023, Jiri Denemark wrote: > > > >> On Thu, Nov 09, 2023 at 15:30:46 +0100, Tim Wiederhake wrote: > >>> For rationale, see patch 3 (cpu_map: No longer ignore vmx- features in > >>> sync_qemu_features_i386.py). > >>> > >>> Adding features in bunches (one patch per msr index), as this series > >>> is adding ~100 features. > >>> > >>> This also adds cpu features "gds-no" and "amx-complex" and brings > >>> libvirt in sync with qemu commit ad6ef0a42e. > >>> > >>> Tim Wiederhake (12): > >>> cpu_map: Add missing feature "gds-no" > >>> cpu_map: Add missing feature "amx-complex" > >>> cpu_map: No longer ignore vmx- features in sync_qemu_features_i386.py > >>> cpu_map: Add missing vmx features from MSR 0x480 > >>> cpu_map: Add missing vmx features from MSR 0x485 > >>> cpu_map: Add missing vmx features from MSR 0x48B > >>> cpu_map: Add missing vmx features from MSR 0x48C > >>> cpu_map: Add missing vmx features from MSR 0x48D > >>> cpu_map: Add missing vmx features from MSR 0x48E > >>> cpu_map: Add missing vmx features from MSR 0x48F > >>> cpu_map: Add missing vmx features from MSR 0x490 > >>> cpu_map: Add missing vmx features from MSR 0x491 > >> > >> I haven't really checked the values of each feature you're adding, but > >> all changes except for those in patch 3 are generated so I expect they > >> are correct :-) > > > > Hi there, > > > > Apologies if this is a PEBCAK, but I'm noticing a strange behaviour when > > testing live migrations from libvirt 9.6 to 9.10+ (including 10.0). > > "virsh migrate --live ..." says: > > > > error: operation failed: guest CPU doesn't match specification: > > extra features: > > vmx-ins-outs,vmx-true-ctls,vmx-store-lma,vmx-activity-hlt,vmx-vmwrite-vmexit-fields,vmx-apicv-xapic,vmx-ept,vmx-desc-exit,vmx-rdtscp-exit,vmx-apicv-x2apic,vmx-vpid,vmx-wbinvd-exit,vmx-unrestricted-guest,vmx-apicv-register,vmx-apicv-vid,vmx-rdrand-exit,vmx-invpcid-exit,vmx-vmfunc,vmx-shadow-vmcs,vmx-invvpid,vmx-invvpid-single-addr,vmx-invvpid-all-context,vmx-ept-execonly,vmx-page-walk-4,vmx-ept-2mb,vmx-ept-1gb,vmx-invept,vmx-eptad,vmx-invept-single-context,vmx-invept-all-context,vmx-intr-exit,vmx-nmi-exit,vmx-vnmi,vmx-preemption-timer,vmx-posted-intr,vmx-vintr-pending,vmx-tsc-offset,vmx-hlt-exit,vmx-invlpg-exit,vmx-mwait-exit,vmx-rdpmc-exit,vmx-rdtsc-exit,vmx-cr3-load-noexit,vmx-cr3-store-noexit,vmx-cr8-load-exit,vmx-cr8-store-exit,vmx-flexpriority,vmx-vnmi-pending,vmx-movdr-exit,vmx-io-exit,vmx-io-bitmap,vmx-mtf,vmx-msr-bitmap,vmx-monitor-exit,vmx-pause-exit,vmx-secondary-ctls,vmx-exit-nosave-debugctl,vmx-exit-load-perf-global-ctrl,vmx-exit-ack-intr,vmx-exit-save-pat,vmx-exit-load-pat,vmx-exit-save-efer,vmx-exit-load-efer,vmx-exit-save-preemption-timer,vmx-entry-noload-debugctl,vmx-entry-ia32e-mode,vmx-entry-load-perf-global-ctrl,vmx-entry-load-pat,vmx-entry-load-efer,vmx-eptp-switching > > > > Judging by the missing features it's complaining about, it seems to be > > something related to what was discussed in this thread. > > > > I could provide more details about the setup, although it's pretty > > straightforward (create a VM under libvirt < 9.10 and try to live > > migrate it to a system running libvirt >= 9.10). > > Hi again, > > Any news on this one? If it is indeed a regression, it seems like an > important one. While looking through the open issues on gitlab I > stumbled upon this one: > > https://gitlab.com/libvirt/libvirt/-/issues/568 > > ... which seems to describe the same problem. Yes, it's the same issue. I've just sent patches that should fix this regression for review: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/RO... Sorry for the delay.