Re: [PATCH v2 0/6] s390x: Fix intermittent errors with IPL from PCI devices on s390x

[Cornelia Huck <cohuck@redhat.com>]

On Tue, Jun 30 2026, jrossi@linux.ibm.com wrote:

> From: Jared Rossi <jrossi@linux.ibm.com>
>
> When booting from a PCI device on s390x there may be intermittent failures
> caused by mismatched byte swaps.  Refactor the byte swapping to ensure that
> it is properly synchronized.
>
> Correct how the queue notification offset is calculated so that it may be
> used for multi-queue configurations in the future.
>
> Handle some switch cases that were not caught for PCI devices.
>
> Changes v1 -> v2:
>     - Split addition of missing break into its own patch
>     - Add PCI case to generic is_viritio_supported() wapper
>     - Switch the order of patches formerly 3 and 4
>     - Use virtio_is_supported() instead of checking cutype when writing IPLB
>         location to cover both CCW and PCI virtio devices
>
> Jared Rossi (3):
>   pc-bios/s390-ccw/virtio.c: Fix missing break for PCI notifications
>   pc-bios/s390-ccw: Verify virtio support when booting from virtio PCI
>     device on s390x
>   pc-bios/s390-ccw: write IPLB location for non-net virtio devices
>
> Zhuoying Cai (3):
>   pc-bios/s390-ccw: Refactor byte swapping
>   pc-bios/s390-ccw: Add per-queue notification offset for multi-queue
>     virtio configurations
>   s390x: Enable boot menu for virtio pci device
>
>  hw/s390x/ipl.c                |  1 +
>  pc-bios/s390-ccw/main.c       |  5 ++-
>  pc-bios/s390-ccw/virtio-pci.c | 57 ++++++++++++++++++++++++++---------
>  pc-bios/s390-ccw/virtio-pci.h |  5 ++-
>  pc-bios/s390-ccw/virtio.c     | 29 ++++++++++--------
>  pc-bios/s390-ccw/virtio.h     |  2 ++
>  6 files changed, 69 insertions(+), 30 deletions(-)
>

Thanks, applied.