kernel/arch/s390/boot/ipl_data.c, branch linux-rolling-stable

s390: Remove compat support

2025-11-17T10:10:38Z

There shouldn't be any 31 bit code around anymore that matters. Remove the compat layer support required to run 31 bit code. Reason for removal is code simplification and reduced test effort. Note that this comes without any deprecation warnings added to config options, or kernel messages, since most likely those would be ignored anyway. If it turns out there is still a reason to keep the compat layer this can be reverted at any time in the future. Reviewed-by: Arnd Bergmann Signed-off-by: Heiko Carstens

s390/ptrace: Rename psw_t32 to psw32_t

2025-11-17T10:10:37Z

Use a standard "_t" suffix for psw_t32 and rename it to psw32_t. Reviewed-by: Arnd Bergmann Signed-off-by: Heiko Carstens

s390/boot: Introduce jump_to_kernel() function

2025-07-10T12:42:10Z

Introduce a global function that jumps from the decompressor to the decompressed kernel. Put its address into svc_old_psw, from where GDB can take it without loading decompressor symbols. It should be available throughout the entire decompressor execution, because it's placed there statically, and nothing in the decompressor uses the SVC instruction. Acked-by: Heiko Carstens Signed-off-by: Ilya Leoshkevich Tested-by: Alexander Gordeev Link: https://lore.kernel.org/r/20250625154220.75300-2-iii@linux.ibm.com Signed-off-by: Alexander Gordeev

s390/boot: convert parmarea to C

2022-05-06T18:45:15Z

Convert parmarea to C, which makes it much easier to initialize it. No need to keep offsets in assembler code in sync with struct parmarea anymore. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens

s390/boot: convert initial lowcore to C

2022-05-06T18:45:15Z

Convert initial lowcore to C and use proper defines and structures to initialize it. This should make the z/VM ipl procedure a bit less magic. Acked-by: Peter Oberparleiter Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens