diff options
| author | Jared Rossi <jrossi@linux.ibm.com> | 2024-10-19 21:29:50 -0400 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2024-10-23 06:53:44 +0200 |
| commit | 455e3bc3f74ee76964efec2e0c646db15095d0d2 (patch) | |
| tree | 25fabeb0f5663d1cff2e77ceab87ff3de499c19c /pc-bios | |
| parent | 0927875e704e93ace03bb7533c0877bf97e4bda9 (diff) | |
s390x: Rebuild IPLB for SCSI device directly from DIAG308
Because virtio-scsi type devices use a non-architected IPLB pbt code they cannot
be set and stored normally. Instead, the IPLB must be rebuilt during re-ipl.
As s390x does not natively support multiple boot devices, the devno field is
used to store the position in the boot order for the device.
Handling the rebuild as part of DIAG308 removes the need to check the devices
for invalid IPLBs later in the IPL.
Signed-off-by: Jared Rossi <jrossi@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20241020012953.1380075-17-jrossi@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'pc-bios')
| -rw-r--r-- | pc-bios/s390-ccw/jump2ipl.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/pc-bios/s390-ccw/jump2ipl.c b/pc-bios/s390-ccw/jump2ipl.c index 8db1764ff3..99d18947d1 100644 --- a/pc-bios/s390-ccw/jump2ipl.c +++ b/pc-bios/s390-ccw/jump2ipl.c @@ -39,10 +39,15 @@ int jump_to_IPL_code(uint64_t address) write_subsystem_identification(); write_iplb_location(); - /* prevent unknown IPL types in the guest */ + /* + * The IPLB for QEMU SCSI type devices must be rebuilt during re-ipl. The + * iplb.devno is set to the boot position of the target SCSI device. + */ if (iplb.pbt == S390_IPL_TYPE_QEMU_SCSI) { - iplb.pbt = S390_IPL_TYPE_CCW; - set_iplb(&iplb); + iplb.devno = qipl.index; + if (!set_iplb(&iplb)) { + panic("Failed to set IPLB"); + } } /* |