Re: [PATCH 0/5] s390x: Add Full Boot Order Support

[Thomas Huth <thuth@redhat.com>]

On 29/05/2024 17.43, jrossi@linux.ibm.com wrote:
> From: Jared Rossi <jrossi@linux.ibm.com>
> 
> This patch set primarily adds support for the specification of multiple boot
> devices, allowing for the guest to automatically use an alternative device on
> a failed boot without needing to be reconfigured. It additionally provides the
> ability to define the loadparm attribute on a per-device bases, which allows
> boot devices to use different loadparm values if needed.
> 
> In brief, an IPLB is generated for each designated boot device (up to a maximum
> of 8) and stored in guest memory immediately before BIOS. If a device fails to
> boot, the next IPLB is retrieved and we jump back to the start of BIOS.
> 
> Devices can be specified using the standard qemu device tag "bootindex" as with
> other architectures. Lower number indices are tried first, with "bootindex=0"
> indicating the first device to try.

Is this supposed with multiple scsi-hd devices, too? I tried to boot a guest 
with two scsi disks (attached to a single virtio-scsi-ccw adapter) where 
only the second disk had a bootable installation, but that failed...?

  Thomas