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s390x: Rebuild IPLB for SCSI device directly from DIAG308

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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>
This commit is contained in:
Jared Rossi 2024-10-19 21:29:50 -04:00 • committed by Thomas Huth
parent 0927875e70
commit 455e3bc3f7
5 changed files with 38 additions and 70 deletions
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3
include/hw/s390x/ipl/qipl.h
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@ -29,7 +29,8 @@
*/
struct QemuIplParameters {
uint8_t qipl_flags;
uint8_t reserved1[3];
uint8_t index;
uint8_t reserved1[2];
uint64_t reserved2;
uint32_t boot_menu_timeout;
uint8_t reserved3[2];