Re: [PATCH 01/15] s390x/pci: implement IOMMU replay

[Cornelia Huck <cohuck@redhat.com>]

On Wed, Apr 01 2026, Konstantin Shkolnyy <kshk@linux.ibm.com> wrote:

> From: Matthew Rosato <mjrosato@linux.ibm.com>
>
> There are a few scenarios where IOMMU replay can potentially be needed
> for zPCI device, namely VFIO device reset scenarios where the guest
> continues running and expects the contents of its IOMMU to be replayed
> upon IOAT re-registration and migration scenarios where the destination
> must reconstruct the IOMMU on the destination.
>
> zPCI migration is not supported yet, but the IOMMU replay function is
> implemented so that it can be called both from IOMMUMemoryRegionClass
> now and migration post_load later.
>
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
> ---
>  hw/s390x/s390-pci-bus.c          | 50 ++++++++++++++++++++++++++++----
>  hw/s390x/s390-pci-inst.c         |  4 +--
>  include/hw/s390x/s390-pci-inst.h |  1 +
>  3 files changed, 47 insertions(+), 8 deletions(-)

Just a procees nit: Please make sure that the s-o-b chain is complete,
i.e. that your s-o-b is always last in the chain, even if you pick up a
patch authored by someone else.