migration: Extend blockers to CPR and Xen device-state saves

[PATCH 0/2] migration: Extend blockers to CPR and Xen device-state saves

Akihiko Odaki posted 2 patches 2 weeks ago

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Maintainers: Richard Henderson <richard.henderson@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, "Philippe Mathieu-Daudé" <philmd@oss.qualcomm.com>, Fam Zheng <fam@euphon.net>, "Michael S. Tsirkin" <mst@redhat.com>, Stefano Garzarella <sgarzare@redhat.com>, Stefan Berger <stefanb@linux.vnet.ibm.com>, Peter Xu <peterx@redhat.com>, Fabiano Rosas <farosas@suse.de>

include/migration/blocker.h | 10 ++++++-
include/qemu/accel.h        |  2 +-
migration/migration.h       |  2 ++
accel/accel-system.c        | 25 +++++++++++++-----
hw/scsi/vhost-scsi.c        |  5 +++-
hw/tpm/tpm_crb.c            |  2 +-
migration/migration.c       | 63 ++++++++++++++++++++++++++++++++++++++-------
migration/savevm.c          |  4 +++
system/vl.c                 |  9 ++++---
9 files changed, 100 insertions(+), 22 deletions(-)

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[PATCH 0/2] migration: Extend blockers to CPR and Xen device-state saves

Posted by Akihiko Odaki 2 weeks ago

Migration blockers do not currently cover every device-state save
path. The TPM CRB blocker only covers normal migration even though CPR
cannot preserve unsupported chunk state. xen-save-devices-state also
operates outside the MigMode machinery and ignores blockers entirely.

Make the TPM CRB blocker apply to every migration class and add a
Xen-specific class that xen-save-devices-state checks. Keep
vhost-scsi's same-host CPR exemption while extending its default blocker
to Xen device-state saves.

Signed-off-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
---
Akihiko Odaki (2):
      hw/tpm: Block CPR with unsupported CRB chunk migration
      migration: Implement Xen migration blocker

 include/migration/blocker.h | 10 ++++++-
 include/qemu/accel.h        |  2 +-
 migration/migration.h       |  2 ++
 accel/accel-system.c        | 25 +++++++++++++-----
 hw/scsi/vhost-scsi.c        |  5 +++-
 hw/tpm/tpm_crb.c            |  2 +-
 migration/migration.c       | 63 ++++++++++++++++++++++++++++++++++++++-------
 migration/savevm.c          |  4 +++
 system/vl.c                 |  9 ++++---
 9 files changed, 100 insertions(+), 22 deletions(-)
---
base-commit: 209b2afaface001c7d4d981e38f186afe7b24a50
change-id: 20260731-xen-bf7d034abc99

Best regards,
--  
Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>