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a45e14148f
Reboot hangs on LPARs without diag308 support. The reason for this is, that before the reboot is done, the channel subsystem is shut down. During the reset on each possible subchannel a "store subchannel" is done. This operation can end in a program check interruption, if the specified subchannel set is not implemented by the hardware. During the reset, currently we do not have a program check handler, which leads to the described kernel bug. We install now a new program check handler for the reboot code to fix this problem. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
91 lines
1.9 KiB
ArmAsm
91 lines
1.9 KiB
ArmAsm
/*
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* arch/s390/kernel/reset.S
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*
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* Copyright (C) IBM Corp. 2006
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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* Michael Holzheu <holzheu@de.ibm.com>
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*/
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#include <asm/ptrace.h>
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#include <asm/lowcore.h>
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#ifdef CONFIG_64BIT
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.globl reset_mcck_handler
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reset_mcck_handler:
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basr %r13,0
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0: lg %r15,__LC_PANIC_STACK # load panic stack
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aghi %r15,-STACK_FRAME_OVERHEAD
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lg %r1,s390_reset_mcck_handler-0b(%r13)
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ltgr %r1,%r1
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jz 1f
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basr %r14,%r1
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1: la %r1,4095
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lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
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lpswe __LC_MCK_OLD_PSW
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.globl s390_reset_mcck_handler
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s390_reset_mcck_handler:
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.quad 0
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.globl reset_pgm_handler
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reset_pgm_handler:
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stmg %r0,%r15,__LC_SAVE_AREA
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basr %r13,0
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0: lg %r15,__LC_PANIC_STACK # load panic stack
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aghi %r15,-STACK_FRAME_OVERHEAD
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lg %r1,s390_reset_pgm_handler-0b(%r13)
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ltgr %r1,%r1
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jz 1f
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basr %r14,%r1
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lmg %r0,%r15,__LC_SAVE_AREA
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lpswe __LC_PGM_OLD_PSW
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1: lpswe disabled_wait_psw-0b(%r13)
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.globl s390_reset_pgm_handler
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s390_reset_pgm_handler:
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.quad 0
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.align 8
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disabled_wait_psw:
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.quad 0x0002000180000000,0x0000000000000000 + reset_pgm_handler
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#else /* CONFIG_64BIT */
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.globl reset_mcck_handler
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reset_mcck_handler:
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basr %r13,0
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0: l %r15,__LC_PANIC_STACK # load panic stack
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ahi %r15,-STACK_FRAME_OVERHEAD
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l %r1,s390_reset_mcck_handler-0b(%r13)
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ltr %r1,%r1
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jz 1f
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basr %r14,%r1
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1: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
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lpsw __LC_MCK_OLD_PSW
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.globl s390_reset_mcck_handler
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s390_reset_mcck_handler:
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.long 0
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.globl reset_pgm_handler
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reset_pgm_handler:
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stm %r0,%r15,__LC_SAVE_AREA
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basr %r13,0
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0: l %r15,__LC_PANIC_STACK # load panic stack
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ahi %r15,-STACK_FRAME_OVERHEAD
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l %r1,s390_reset_pgm_handler-0b(%r13)
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ltr %r1,%r1
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jz 1f
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basr %r14,%r1
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lm %r0,%r15,__LC_SAVE_AREA
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lpsw __LC_PGM_OLD_PSW
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1: lpsw disabled_wait_psw-0b(%r13)
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.globl s390_reset_pgm_handler
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s390_reset_pgm_handler:
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.long 0
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disabled_wait_psw:
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.align 8
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.long 0x000a0000,0x00000000 + reset_pgm_handler
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#endif /* CONFIG_64BIT */
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