[v1] s390x/pci: Implement migration for emulated devices

[PATCH 00/15] s390x/pci: Implement migration for emulated devices

Konstantin Shkolnyy posted 15 patches 1 week, 2 days ago

Diff against v2
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git fetch https://github.com/patchew-project/qemu tags/patchew/20260402022921.298818-1-kshk@linux.ibm.com

Maintainers: Matthew Rosato <mjrosato@linux.ibm.com>, Farhan Ali <alifm@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Halil Pasic <pasic@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Richard Henderson <richard.henderson@linaro.org>, Ilya Leoshkevich <iii@linux.ibm.com>, David Hildenbrand <david@kernel.org>, Cornelia Huck <cohuck@redhat.com>

There is a newer version of this series

hw/s390x/s390-pci-bus.c          | 251 ++++++++++++++++++++++++-------
hw/s390x/s390-pci-inst.c         | 116 +++++++-------
hw/s390x/s390-pci-vfio.c         |   4 +-
include/hw/s390x/s390-pci-bus.h  |  37 +++--
include/hw/s390x/s390-pci-inst.h |   3 +-
5 files changed, 286 insertions(+), 125 deletions(-)

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[PATCH 00/15] s390x/pci: Implement migration for emulated devices

Posted by Konstantin Shkolnyy 1 week, 2 days ago

Up until now QEMU marked any zPCI device as "unmigratable."

This patch series adds support for migrating emulated devices, which are
simpler to migrate. It leaves VFIO devices still unmigratable.

To enable migration, the device state needs to be saved/restored to/from
the migration stream.

There are 2 kinds of emulated devices - those that use the zPCI IOMMU page
table emulation in QEMU (e.g., Intel IGB NIC), and those that don't (virtio).
This is important to note for testing purposes.

This change was tested on IGB, virtio-net and virtio-blk devices by running
I/O on them while performing "virsh managedsave, virsh start".

Konstantin Shkolnyy (14):
  s390x/pci: Create function to contain translation status check
  s390x/pci: Move iommu_mr from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move dm_mr from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move iotlb from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Remove a ptr to S390PCIBusDevice from S390PCIIOMMU
  s390x/pci: Move/rename enabled from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move dma_limit from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move g_iota from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move pba from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move pal from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Move max_dma_limit from S390PCIIOMMU to S390PCIBusDevice
  s390x/pci: Add a comment explaining S390PCIIOMMU purpose
  s390x/pci: Implement migration for emulated devices
  s390x/pci: Create function to contain fmb_timer start

Matthew Rosato (1):
  s390x/pci: implement IOMMU replay

 hw/s390x/s390-pci-bus.c          | 251 ++++++++++++++++++++++++-------
 hw/s390x/s390-pci-inst.c         | 116 +++++++-------
 hw/s390x/s390-pci-vfio.c         |   4 +-
 include/hw/s390x/s390-pci-bus.h  |  37 +++--
 include/hw/s390x/s390-pci-inst.h |   3 +-
 5 files changed, 286 insertions(+), 125 deletions(-)

-- 
2.34.1