BOOT_IMAGE not set for /proc/cmdline

ibm-s390-linux / s390-tools

Tools for use with the s390 Linux kernel and device drivers

MIT License

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BOOT_IMAGE not set for /proc/cmdline #67

Closed sharkcz closed 5 years ago

sharkcz commented 5 years ago

When using recent zipl for booting an up-to-date Fedora Rawhide system (uses BLS boot entries), I don't see the BOOT_IMAGE variable being set by the bootloader, so it doesn't appear in /proc/cmdline. We get the same behaviour with RHEL-8.1 (work in progress, see bug 1728677) so I suspect the secure boot patches might break it. Looking further ...

stefan-haberland commented 5 years ago

Where did you IPL from? DASD or SCSI? Was secure boot enabled?

sharkcz commented 5 years ago

DASD in z/VM guest, secureboot not used

stefan-haberland commented 5 years ago

Thanks, I will have a look.

stefan-haberland commented 5 years ago

Looks like stage 2 overwrites the extra_param when loading the stage 3 parameter page. I need to shuffle around the memory area used there.