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s390/entry: Make restart_int_handler() ready for lowcore relocation

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In preparation of having lowcore at different address than zero,
add the base register to all lowcore accesses in restart_int_handler().

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2024-07-22 15:41:23 +02:00 committed by Vasily Gorbik
parent 0001b7bbc5
commit 4064b71112
1 changed files with 8 additions and 6 deletions
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14
arch/s390/kernel/entry.S
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@ -573,15 +573,17 @@ SYM_CODE_START(restart_int_handler)
0: larl %r15,daton_psw
lpswe 0(%r15) # turn dat on, keep irqs off
.Ldaton:
lg %r15,__LC_RESTART_STACK
GET_LC %r15
lg %r15,__LC_RESTART_STACK(%r15)
xc STACK_FRAME_OVERHEAD(__PT_SIZE,%r15),STACK_FRAME_OVERHEAD(%r15)
stmg %r0,%r14,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
mvc STACK_FRAME_OVERHEAD+__PT_R15(8,%r15),__LC_SAVE_AREA_RESTART
mvc STACK_FRAME_OVERHEAD+__PT_PSW(16,%r15),__LC_RST_OLD_PSW
GET_LC %r13
mvc STACK_FRAME_OVERHEAD+__PT_R15(8,%r15),__LC_SAVE_AREA_RESTART(%r13)
mvc STACK_FRAME_OVERHEAD+__PT_PSW(16,%r15),__LC_RST_OLD_PSW(%r13)
xc 0(STACK_FRAME_OVERHEAD,%r15),0(%r15)
lg %r1,__LC_RESTART_FN # load fn, parm & source cpu
lg %r2,__LC_RESTART_DATA
lgf %r3,__LC_RESTART_SOURCE
lg %r1,__LC_RESTART_FN(%r13) # load fn, parm & source cpu
lg %r2,__LC_RESTART_DATA(%r13)
lgf %r3,__LC_RESTART_SOURCE(%r13)
ltgr %r3,%r3 # test source cpu address
jm 1f # negative -> skip source stop
0: sigp %r4,%r3,SIGP_SENSE # sigp sense to source cpu