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Commit ff6b8ea6 authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky
Browse files

[S390] ipl/dump on panic. 



It is now possible to specify a ccw/fcp dump device which is used to
automatically create a system dump in case of a kernel panic. The dump
device can be configured under /sys/firmware/dump.
In addition it is now possible to specify a ccw/fcp device which is used
for the next reboot of Linux. The reipl device can be configured under
/sys/firmware/reipl.

Signed-off-by: default avatarMichael Holzheu <holzheu@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 331c982d

arch/s390/kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ EXTRA_AFLAGS := -traditional 


obj-y	:=  bitmap.o traps.o time.o process.o \

            setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \

            semaphore.o s390_ext.o debug.o profile.o irq.o reipl_diag.o

	    semaphore.o s390_ext.o debug.o profile.o irq.o ipl.o



obj-y	+= $(if $(CONFIG_64BIT),entry64.o,entry.o)

obj-y	+= $(if $(CONFIG_64BIT),reipl64.o,reipl.o)

arch/s390/kernel/head31.S

+3 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ startup:basr %r13,0 # get base 
startup_continue:

	basr	%r13,0			# get base

.LPG1:	GET_IPL_DEVICE

	mvi	__LC_AR_MODE_ID,0	# set ESA flag (mode 0)

	lctl	%c0,%c15,.Lctl-.LPG1(%r13) # load control registers

	l	%r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area

					# move IPL device to lowcore
@@ -274,6 +275,8 @@ startup_continue: 
.Lparmaddr: .long PARMAREA

.Lsccbaddr: .long .Lsccb

	.org	0x12000

.globl s390_readinfo_sccb

s390_readinfo_sccb:

.Lsccb:

	.hword	0x1000			# length, one page

	.byte	0x00,0x00,0x00

arch/s390/kernel/head64.S

+3 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ startup_continue: 
        srl   %r13,1

	GET_IPL_DEVICE

        lhi   %r1,1                      # mode 1 = esame

	mvi   __LC_AR_MODE_ID,1		 # set esame flag

        slr   %r0,%r0                    # set cpuid to zero

        sigp  %r1,%r0,0x12               # switch to esame mode

	sam64				 # switch to 64 bit mode
@@ -269,6 +270,8 @@ startup_continue: 
	.quad	PARMAREA



	.org	0x12000

.globl s390_readinfo_sccb

s390_readinfo_sccb:

.Lsccb:

	.hword 0x1000			# length, one page

	.byte 0x00,0x00,0x00

arch/s390/kernel/ipl.c

0 → 100644
+942 −0

File added.

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arch/s390/kernel/reipl.S

+26 −7

File changed.

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