What were you trying to do that didn't work?

Migrate vm from RHEL9.7 to RHEL 10.0 with 4k kernel

https://libvirt-rhos-jenkins-product.hosted.upshift.rdu2.redhat.com/job/libvirt-RHEL-9.7-runtest-aarch64-acceptance-cross_migration_ampere_mtsnow/10/testReport/rhel.virsh/migrate_options_shared/positive_test_vcpu_number_vcpu_16_without_postcopy/

Please provide the package NVR for which the bug is seen:

Source: ampere-one-x-07
kernel-5.14.0-611.2.1.el9_7.aarch64
qemu-kvm-9.1.0-29.el9_7.aarch64
libvirt-10.10.0-15.el9.aarch64
log:
2025-09-26 07:47:32.036+0000: Domain id=2 is tainted: custom-monitor
2025-09-26 07:48:09.428+0000: initiating migration
2025-09-26T07:48:19.565956Z qemu-kvm: Unable to read from socket: Connection reset by peer

Target: ampere-one-x-08:
kernel-6.12.0-55.37.1.el10_0.aarch64
libvirt-10.10.0-8.4.el10_0.aarch64
qemu-kvm-9.1.0-15.el10_0.4.aarch64

2025-09-26T07:48:09.262983Z qemu-kvm: warning: Machine type 'virt-rhel9.6.0' is deprecated: machines from the previous RHEL major release are subject to deletion in the next RHEL major release
2025-09-26T07:48:19.548301Z qemu-kvm: error while loading state for instance 0x0 of device 'cpu'
2025-09-26T07:48:19.548557Z qemu-kvm: Failed to put registers after init: Invalid argument
2025-09-26 07:48:20.150+0000: shutting down, reason=crashed

How reproducible is this bug?:

100%

Steps to reproduce

1. Setup migration environment
2. Run command:

   virsh -c 'qemu:///system' migrate --live --p2p --verbose --domain avocado-vt-vm1 --desturi qemu+ssh://10.26.1.121/system

   #

Expected results

migration succeeds

Actual results

Migration: [100.00 %]^M[stdlog] Migration: [100.00 %]error: operation failed: job 'migration out' failed: Unable to read from socket: Connection reset by peer

Source: ampere-one-x-07
log:
2025-09-26 07:47:32.036+0000: Domain id=2 is tainted: custom-monitor
2025-09-26 07:48:09.428+0000: initiating migration
2025-09-26T07:48:19.565956Z qemu-kvm: Unable to read from socket: Connection reset by peer

Target: ampere-one-x-08:
2025-09-26T07:48:09.262983Z qemu-kvm: warning: Machine type 'virt-rhel9.6.0' is deprecated: machines from the previous RHEL major release are subject to deletion in the next RHEL major release
2025-09-26T07:48:19.548301Z qemu-kvm: error while loading state for instance 0x0 of device 'cpu'
2025-09-26T07:48:19.548557Z qemu-kvm: Failed to put registers after init: Invalid argument
2025-09-26 07:48:20.150+0000: shutting down, reason=crashed