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-rw-r--r--arch/s390/kernel/Makefile3
-rw-r--r--arch/s390/kernel/entry.S12
-rw-r--r--arch/s390/kernel/entry64.S16
-rw-r--r--arch/s390/kernel/head.S69
-rw-r--r--arch/s390/kernel/head31.S48
-rw-r--r--arch/s390/kernel/head64.S59
-rw-r--r--arch/s390/kernel/ipl.c942
-rw-r--r--arch/s390/kernel/kprobes.c657
-rw-r--r--arch/s390/kernel/reipl.S33
-rw-r--r--arch/s390/kernel/reipl64.S34
-rw-r--r--arch/s390/kernel/reipl_diag.c39
-rw-r--r--arch/s390/kernel/s390_ksyms.c6
-rw-r--r--arch/s390/kernel/setup.c272
-rw-r--r--arch/s390/kernel/signal.c40
-rw-r--r--arch/s390/kernel/smp.c10
-rw-r--r--arch/s390/kernel/traps.c31
-rw-r--r--arch/s390/kernel/vmlinux.lds.S3
17 files changed, 1860 insertions, 414 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 9a33ed6ca69..aa978978d3d 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -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 $(CONFIG_64BIT),reipl64.o,reipl.o)
@@ -24,6 +24,7 @@ obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o \
obj-$(CONFIG_VIRT_TIMER) += vtime.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
+obj-$(CONFIG_KPROBES) += kprobes.o
# Kexec part
S390_KEXEC_OBJS := machine_kexec.o crash.o
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 5b5799ac8f8..0c712b78a7e 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -505,6 +505,8 @@ pgm_no_vtime2:
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ tm SP_PSW+1(%r15),0x01 # kernel per event ?
+ bz BASED(kernel_per)
l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
nr %r8,%r3 # clear per-event-bit and ilc
@@ -536,6 +538,16 @@ pgm_no_vtime3:
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
b BASED(sysc_do_svc)
+#
+# per was called from kernel, must be kprobes
+#
+kernel_per:
+ mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ l %r1,BASED(.Lhandle_per) # load adr. of per handler
+ la %r14,BASED(sysc_leave) # load adr. of system return
+ br %r1 # branch to do_single_step
+
/*
* IO interrupt handler routine
*/
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 56f5f613b86..29bbfbab733 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -518,6 +518,8 @@ pgm_no_vtime2:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
lg %r1,__TI_task(%r9)
+ tm SP_PSW+1(%r15),0x01 # kernel per event ?
+ jz kernel_per
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
@@ -553,6 +555,16 @@ pgm_no_vtime3:
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
j sysc_do_svc
+#
+# per was called from kernel, must be kprobes
+#
+kernel_per:
+ lhi %r0,__LC_PGM_OLD_PSW
+ sth %r0,SP_TRAP(%r15) # set trap indication to pgm check
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ larl %r14,sysc_leave # load adr. of system ret, no work
+ jg do_single_step # branch to do_single_step
+
/*
* IO interrupt handler routine
*/
@@ -815,7 +827,7 @@ restart_go:
*/
stack_overflow:
lg %r15,__LC_PANIC_STACK # change to panic stack
- aghi %r1,-SP_SIZE
+ aghi %r15,-SP_SIZE
mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
la %r1,__LC_SAVE_AREA
@@ -823,7 +835,7 @@ stack_overflow:
je 0f
chi %r12,__LC_PGM_OLD_PSW
je 0f
- la %r1,__LC_SAVE_AREA+16
+ la %r1,__LC_SAVE_AREA+32
0: mvc SP_R12(32,%r15),0(%r1) # move %r12-%r15 to stack
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # clear back chain
la %r2,SP_PTREGS(%r15) # load pt_regs
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index adad8863ee2..0f1db268a8a 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -272,7 +272,7 @@ iplstart:
# load parameter file from ipl device
#
.Lagain1:
- l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # ramdisk loc. is temp
+ l %r2,.Linitrd # ramdisk loc. is temp
bas %r14,.Lloader # load parameter file
ltr %r2,%r2 # got anything ?
bz .Lnopf
@@ -280,7 +280,7 @@ iplstart:
bnh .Lnotrunc
la %r2,895
.Lnotrunc:
- l %r4,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
+ l %r4,.Linitrd
clc 0(3,%r4),.L_hdr # if it is HDRx
bz .Lagain1 # skip dataset header
clc 0(3,%r4),.L_eof # if it is EOFx
@@ -323,14 +323,15 @@ iplstart:
# load ramdisk from ipl device
#
.Lagain2:
- l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # addr of ramdisk
+ l %r2,.Linitrd # addr of ramdisk
+ st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
bas %r14,.Lloader # load ramdisk
st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of ramdisk
ltr %r2,%r2
bnz .Lrdcont
st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
.Lrdcont:
- l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
+ l %r2,.Linitrd
clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
bz .Lagain2
@@ -379,6 +380,7 @@ iplstart:
l %r1,.Lstartup
br %r1
+.Linitrd:.long _end + 0x400000 # default address of initrd
.Lparm: .long PARMAREA
.Lstartup: .long startup
.Lcvtab:.long _ebcasc # ebcdic to ascii table
@@ -479,65 +481,6 @@ start:
.byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
.byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
-.macro GET_IPL_DEVICE
-.Lget_ipl_device:
- l %r1,0xb8 # get sid
- sll %r1,15 # test if subchannel is enabled
- srl %r1,31
- ltr %r1,%r1
- bz 2f-.LPG1(%r13) # subchannel disabled
- l %r1,0xb8
- la %r5,.Lipl_schib-.LPG1(%r13)
- stsch 0(%r5) # get schib of subchannel
- bnz 2f-.LPG1(%r13) # schib not available
- tm 5(%r5),0x01 # devno valid?
- bno 2f-.LPG1(%r13)
- la %r6,ipl_parameter_flags-.LPG1(%r13)
- oi 3(%r6),0x01 # set flag
- la %r2,ipl_devno-.LPG1(%r13)
- mvc 0(2,%r2),6(%r5) # store devno
- tm 4(%r5),0x80 # qdio capable device?
- bno 2f-.LPG1(%r13)
- oi 3(%r6),0x02 # set flag
-
- # copy ipl parameters
-
- lhi %r0,4096
- l %r2,20(%r0) # get address of parameter list
- lhi %r3,IPL_PARMBLOCK_ORIGIN
- st %r3,20(%r0)
- lhi %r4,1
- cr %r2,%r3 # start parameters < destination ?
- jl 0f
- lhi %r1,1 # copy direction is upwards
- j 1f
-0: lhi %r1,-1 # copy direction is downwards
- ar %r2,%r0
- ar %r3,%r0
- ar %r2,%r1
- ar %r3,%r1
-1: mvc 0(1,%r3),0(%r2) # finally copy ipl parameters
- ar %r3,%r1
- ar %r2,%r1
- sr %r0,%r4
- jne 1b
- b 2f-.LPG1(%r13)
-
- .align 4
-.Lipl_schib:
- .rept 13
- .long 0
- .endr
-
- .globl ipl_parameter_flags
-ipl_parameter_flags:
- .long 0
- .globl ipl_devno
-ipl_devno:
- .word 0
-2:
-.endm
-
#ifdef CONFIG_64BIT
#include "head64.S"
#else
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index a4dc61f3285..1fa9fa1ca74 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -26,8 +26,8 @@ startup:basr %r13,0 # get base
#
.org PARMAREA
.long 0,0 # IPL_DEVICE
- .long 0,RAMDISK_ORIGIN # INITRD_START
- .long 0,RAMDISK_SIZE # INITRD_SIZE
+ .long 0,0 # INITRD_START
+ .long 0,0 # INITRD_SIZE
.org COMMAND_LINE
.byte "root=/dev/ram0 ro"
@@ -37,12 +37,23 @@ startup:basr %r13,0 # get base
startup_continue:
basr %r13,0 # get base
-.LPG1: GET_IPL_DEVICE
+.LPG1: 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
mvc __LC_IPLDEV(4),IPL_DEVICE-PARMAREA(%r12)
+#
+# Setup stack
+#
+ l %r15,.Linittu-.LPG1(%r13)
+ mvc __LC_CURRENT(4),__TI_task(%r15)
+ ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
+ st %r15,__LC_KERNEL_STACK # set end of kernel stack
+ ahi %r15,-96
+ xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
+ l %r14,.Lipl_save_parameters-.LPG1(%r13)
+ basr %r14,%r14
#
# clear bss memory
#
@@ -114,6 +125,10 @@ startup_continue:
b .Lfchunk-.LPG1(%r13)
.align 4
+.Lipl_save_parameters:
+ .long ipl_save_parameters
+.Linittu:
+ .long init_thread_union
.Lpmask:
.byte 0
.align 8
@@ -273,7 +288,23 @@ startup_continue:
.Lbss_end: .long _end
.Lparmaddr: .long PARMAREA
.Lsccbaddr: .long .Lsccb
+
+ .globl ipl_schib
+ipl_schib:
+ .rept 13
+ .long 0
+ .endr
+
+ .globl ipl_flags
+ipl_flags:
+ .long 0
+ .globl ipl_devno
+ipl_devno:
+ .word 0
+
.org 0x12000
+.globl s390_readinfo_sccb
+s390_readinfo_sccb:
.Lsccb:
.hword 0x1000 # length, one page
.byte 0x00,0x00,0x00
@@ -302,16 +333,6 @@ startup_continue:
.globl _stext
_stext: basr %r13,0 # get base
.LPG3:
-#
-# Setup stack
-#
- l %r15,.Linittu-.LPG3(%r13)
- mvc __LC_CURRENT(4),__TI_task(%r15)
- ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
- st %r15,__LC_KERNEL_STACK # set end of kernel stack
- ahi %r15,-96
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
-
# check control registers
stctl %c0,%c15,0(%r15)
oi 2(%r15),0x40 # enable sigp emergency signal
@@ -330,6 +351,5 @@ _stext: basr %r13,0 # get base
#
.align 8
.Ldw: .long 0x000a0000,0x00000000
-.Linittu:.long init_thread_union
.Lstart:.long start_kernel
.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 9d80c5b1ef9..a8bdd96494c 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -26,8 +26,8 @@ startup:basr %r13,0 # get base
#
.org PARMAREA
.quad 0 # IPL_DEVICE
- .quad RAMDISK_ORIGIN # INITRD_START
- .quad RAMDISK_SIZE # INITRD_SIZE
+ .quad 0 # INITRD_START
+ .quad 0 # INITRD_SIZE
.org COMMAND_LINE
.byte "root=/dev/ram0 ro"
@@ -39,8 +39,8 @@ startup_continue:
basr %r13,0 # get base
.LPG1: sll %r13,1 # remove high order bit
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
@@ -48,7 +48,18 @@ startup_continue:
lg %r12,.Lparmaddr-.LPG1(%r13)# pointer to parameter area
# move IPL device to lowcore
mvc __LC_IPLDEV(4),IPL_DEVICE+4-PARMAREA(%r12)
+#
+# Setup stack
+#
+ larl %r15,init_thread_union
+ lg %r14,__TI_task(%r15) # cache current in lowcore
+ stg %r14,__LC_CURRENT
+ aghi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union + THREAD_SIZE
+ stg %r15,__LC_KERNEL_STACK # set end of kernel stack
+ aghi %r15,-160
+ xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
+ brasl %r14,ipl_save_parameters
#
# clear bss memory
#
@@ -239,6 +250,19 @@ startup_continue:
oi 7(%r12),0x80 # set IDTE flag
0:
+#
+# find out if we have the MVCOS instruction
+#
+ la %r1,0f-.LPG1(%r13) # set program check address
+ stg %r1,__LC_PGM_NEW_PSW+8
+ .short 0xc800 # mvcos 0(%r0),0(%r0),%r0
+ .short 0x0000
+ .short 0x0000
+0: tm 0x8f,0x13 # special-operation exception?
+ bno 1f-.LPG1(%r13) # if yes, MVCOS is present
+ oi 6(%r12),2 # set MVCOS flag
+1:
+
lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space,
# virtual and never return ...
.align 16
@@ -268,7 +292,22 @@ startup_continue:
.Lparmaddr:
.quad PARMAREA
+ .globl ipl_schib
+ipl_schib:
+ .rept 13
+ .long 0
+ .endr
+
+ .globl ipl_flags
+ipl_flags:
+ .long 0
+ .globl ipl_devno
+ipl_devno:
+ .word 0
+
.org 0x12000
+.globl s390_readinfo_sccb
+s390_readinfo_sccb:
.Lsccb:
.hword 0x1000 # length, one page
.byte 0x00,0x00,0x00
@@ -297,24 +336,12 @@ startup_continue:
.globl _stext
_stext: basr %r13,0 # get base
.LPG3:
-#
-# Setup stack
-#
- larl %r15,init_thread_union
- lg %r14,__TI_task(%r15) # cache current in lowcore
- stg %r14,__LC_CURRENT
- aghi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union + THREAD_SIZE
- stg %r15,__LC_KERNEL_STACK # set end of kernel stack
- aghi %r15,-160
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
-
# check control registers
stctg %c0,%c15,0(%r15)
oi 6(%r15),0x40 # enable sigp emergency signal
oi 4(%r15),0x10 # switch on low address proctection
lctlg %c0,%c15,0(%r15)
-#
lam 0,15,.Laregs-.LPG3(%r13) # load access regs needed by uaccess
brasl %r14,start_kernel # go to C code
#
@@ -322,7 +349,7 @@ _stext: basr %r13,0 # get base
#
basr %r13,0
lpswe .Ldw-.(%r13) # load disabled wait psw
-#
+
.align 8
.Ldw: .quad 0x0002000180000000,0x0000000000000000
.Laregs: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
new file mode 100644
index 00000000000..6555cc48e28
--- /dev/null
+++ b/arch/s390/kernel/ipl.c
@@ -0,0 +1,942 @@
+/*
+ * arch/s390/kernel/ipl.c
+ * ipl/reipl/dump support for Linux on s390.
+ *
+ * Copyright (C) IBM Corp. 2005,2006
+ * Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Volker Sameske <sameske@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <asm/smp.h>
+#include <asm/setup.h>
+#include <asm/cpcmd.h>
+#include <asm/cio.h>
+
+#define IPL_PARM_BLOCK_VERSION 0
+
+enum ipl_type {
+ IPL_TYPE_NONE = 1,
+ IPL_TYPE_UNKNOWN = 2,
+ IPL_TYPE_CCW = 4,
+ IPL_TYPE_FCP = 8,
+};
+
+#define IPL_NONE_STR "none"
+#define IPL_UNKNOWN_STR "unknown"
+#define IPL_CCW_STR "ccw"
+#define IPL_FCP_STR "fcp"
+
+static char *ipl_type_str(enum ipl_type type)
+{
+ switch (type) {
+ case IPL_TYPE_NONE:
+ return IPL_NONE_STR;
+ case IPL_TYPE_CCW:
+ return IPL_CCW_STR;
+ case IPL_TYPE_FCP:
+ return IPL_FCP_STR;
+ case IPL_TYPE_UNKNOWN:
+ default:
+ return IPL_UNKNOWN_STR;
+ }
+}
+
+enum ipl_method {
+ IPL_METHOD_NONE,
+ IPL_METHOD_CCW_CIO,
+ IPL_METHOD_CCW_DIAG,
+ IPL_METHOD_CCW_VM,
+ IPL_METHOD_FCP_RO_DIAG,
+ IPL_METHOD_FCP_RW_DIAG,
+ IPL_METHOD_FCP_RO_VM,
+};
+
+enum shutdown_action {
+ SHUTDOWN_REIPL,
+ SHUTDOWN_DUMP,
+ SHUTDOWN_STOP,
+};
+
+#define SHUTDOWN_REIPL_STR "reipl"
+#define SHUTDOWN_DUMP_STR "dump"
+#define SHUTDOWN_STOP_STR "stop"
+
+static char *shutdown_action_str(enum shutdown_action action)
+{
+ switch (action) {
+ case SHUTDOWN_REIPL:
+ return SHUTDOWN_REIPL_STR;
+ case SHUTDOWN_DUMP:
+ return SHUTDOWN_DUMP_STR;
+ case SHUTDOWN_STOP:
+ return SHUTDOWN_STOP_STR;
+ default:
+ BUG();
+ }
+}
+
+enum diag308_subcode {
+ DIAG308_IPL = 3,
+ DIAG308_DUMP = 4,
+ DIAG308_SET = 5,
+ DIAG308_STORE = 6,
+};
+
+enum diag308_ipl_type {
+ DIAG308_IPL_TYPE_FCP = 0,
+ DIAG308_IPL_TYPE_CCW = 2,
+};
+
+enum diag308_opt {
+ DIAG308_IPL_OPT_IPL = 0x10,
+ DIAG308_IPL_OPT_DUMP = 0x20,
+};
+
+enum diag308_rc {
+ DIAG308_RC_OK = 1,
+};
+
+static int diag308_set_works = 0;
+
+static int reipl_capabilities = IPL_TYPE_UNKNOWN;
+static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
+static enum ipl_method reipl_method = IPL_METHOD_NONE;
+static struct ipl_parameter_block *reipl_block_fcp;
+static struct ipl_parameter_block *reipl_block_ccw;
+
+static int dump_capabilities = IPL_TYPE_NONE;
+static enum ipl_type dump_type = IPL_TYPE_NONE;
+static enum ipl_method dump_method = IPL_METHOD_NONE;
+static struct ipl_parameter_block *dump_block_fcp;
+static struct ipl_parameter_block *dump_block_ccw;
+
+static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
+
+static int diag308(unsigned long subcode, void *addr)
+{
+ register unsigned long _addr asm("0") = (unsigned long)addr;
+ register unsigned long _rc asm("1") = 0;
+
+ asm volatile (
+ " diag %0,%2,0x308\n"
+ "0: \n"
+ ".section __ex_table,\"a\"\n"
+#ifdef CONFIG_64BIT
+ " .align 8\n"
+ " .quad 0b, 0b\n"
+#else
+ " .align 4\n"
+ " .long 0b, 0b\n"
+#endif
+ ".previous\n"
+ : "+d" (_addr), "+d" (_rc)
+ : "d" (subcode) : "cc", "memory" );
+
+ return _rc;
+}
+
+/* SYSFS */
+
+#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
+ char *page) \
+{ \
+ return sprintf(page, _format, _value); \
+} \
+static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
+ __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
+
+#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
+ char *page) \
+{ \
+ return sprintf(page, _fmt_out, \
+ (unsigned long long) _value); \
+} \
+static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
+ const char *buf, size_t len) \
+{ \
+ unsigned long long value; \
+ if (sscanf(buf, _fmt_in, &value) != 1) \
+ return -EINVAL; \
+ _value = value; \
+ return len; \
+} \
+static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
+ __ATTR(_name,(S_IRUGO | S_IWUSR), \
+ sys_##_prefix##_##_name##_show, \
+ sys_##_prefix##_##_name##_store);
+
+static void make_attrs_ro(struct attribute **attrs)
+{
+ while (*attrs) {
+ (*attrs)->mode = S_IRUGO;
+ attrs++;
+ }
+}
+
+/*
+ * ipl section
+ */
+
+static enum ipl_type ipl_get_type(void)
+{
+ struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+ if (!(ipl_flags & IPL_DEVNO_VALID))
+ return IPL_TYPE_UNKNOWN;
+ if (!(ipl_flags & IPL_PARMBLOCK_VALID))
+ return IPL_TYPE_CCW;
+ if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
+ return IPL_TYPE_UNKNOWN;
+ if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
+ return IPL_TYPE_UNKNOWN;
+ return IPL_TYPE_FCP;
+}
+
+static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
+}
+
+static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
+
+static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
+{
+ struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+ switch (ipl_get_type()) {
+ case IPL_TYPE_CCW:
+ return sprintf(page, "0.0.%04x\n", ipl_devno);
+ case IPL_TYPE_FCP:
+ return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
+ default:
+ return 0;
+ }
+}
+
+static struct subsys_attribute sys_ipl_device_attr =
+ __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
+
+static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off,
+ size_t count)
+{
+ unsigned int size = IPL_PARMBLOCK_SIZE;
+
+ if (off > size)
+ return 0;
+ if (off + count > size)
+ count = size - off;
+ memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
+ return count;
+}
+
+static struct bin_attribute ipl_parameter_attr = {
+ .attr = {
+ .name = "binary_parameter",
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE,
+ },
+ .size = PAGE_SIZE,
+ .read = &ipl_parameter_read,
+};
+
+static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off,
+ size_t count)
+{
+ unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
+ void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
+
+ if (off > size)
+ return 0;
+ if (off + count > size)
+ count = size - off;
+ memcpy(buf, scp_data + off, count);
+ return count;
+}
+
+static struct bin_attribute ipl_scp_data_attr = {
+ .attr = {
+ .name = "scp_data",
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE,
+ },
+ .size = PAGE_SIZE,
+ .read = &ipl_scp_data_read,
+};
+
+/* FCP ipl device attributes */
+
+DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
+ IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
+DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
+ IPL_PARMBLOCK_START->ipl_info.fcp.lun);
+DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
+ IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
+DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
+ IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
+
+static struct attribute *ipl_fcp_attrs[] = {
+ &sys_ipl_type_attr.attr,
+ &sys_ipl_device_attr.attr,
+ &sys_ipl_fcp_wwpn_attr.attr,
+ &sys_ipl_fcp_lun_attr.attr,
+ &sys_ipl_fcp_bootprog_attr.attr,
+ &sys_ipl_fcp_br_lba_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_fcp_attr_group = {
+ .attrs = ipl_fcp_attrs,
+};
+
+/* CCW ipl device attributes */
+
+static struct attribute *ipl_ccw_attrs[] = {
+ &sys_ipl_type_attr.attr,
+ &sys_ipl_device_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_ccw_attr_group = {
+ .attrs = ipl_ccw_attrs,
+};
+
+/* UNKNOWN ipl device attributes */
+
+static struct attribute *ipl_unknown_attrs[] = {
+ &sys_ipl_type_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_unknown_attr_group = {
+ .attrs = ipl_unknown_attrs,
+};
+
+static decl_subsys(ipl, NULL, NULL);
+
+/*
+ * reipl section
+ */
+
+/* FCP reipl device attributes */
+
+DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
+ reipl_block_fcp->ipl_info.fcp.wwpn);
+DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
+ reipl_block_fcp->ipl_info.fcp.lun);
+DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
+ reipl_block_fcp->ipl_info.fcp.bootprog);
+DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
+ reipl_block_fcp->ipl_info.fcp.br_lba);
+DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
+ reipl_block_fcp->ipl_info.fcp.devno);
+
+static struct attribute *reipl_fcp_attrs[] = {
+ &sys_reipl_fcp_device_attr.attr,
+ &sys_reipl_fcp_wwpn_attr.attr,
+ &sys_reipl_fcp_lun_attr.attr,
+ &sys_reipl_fcp_bootprog_attr.attr,
+ &sys_reipl_fcp_br_lba_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_fcp_attr_group = {
+ .name = IPL_FCP_STR,
+ .attrs = reipl_fcp_attrs,
+};
+
+/* CCW reipl device attributes */
+
+DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
+ reipl_block_ccw->ipl_info.ccw.devno);
+
+static struct attribute *reipl_ccw_attrs[] = {
+ &sys_reipl_ccw_device_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_ccw_attr_group = {
+ .name = IPL_CCW_STR,
+ .attrs = reipl_ccw_attrs,
+};
+
+/* reipl type */
+
+static int reipl_set_type(enum ipl_type type)
+{
+ if (!(reipl_capabilities & type))
+ return -EINVAL;
+
+ switch(type) {
+ case IPL_TYPE_CCW:
+ if (MACHINE_IS_VM)
+ reipl_method = IPL_METHOD_CCW_VM;
+ else
+ reipl_method = IPL_METHOD_CCW_CIO;
+ break;
+ case IPL_TYPE_FCP:
+ if (diag308_set_works)
+ reipl_method = IPL_METHOD_FCP_RW_DIAG;
+ else if (MACHINE_IS_VM)
+ reipl_method = IPL_METHOD_FCP_RO_VM;
+ else
+ reipl_method = IPL_METHOD_FCP_RO_DIAG;
+ break;
+ default:
+ reipl_method = IPL_METHOD_NONE;
+ }
+ reipl_type = type;
+ return 0;
+}
+
+static ssize_t reipl_type_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%s\n", ipl_type_str(reipl_type));
+}
+
+static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf,
+ size_t len)
+{
+ int rc = -EINVAL;
+
+ if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
+ rc = reipl_set_type(IPL_TYPE_CCW);
+ else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
+ rc = reipl_set_type(IPL_TYPE_FCP);
+ return (rc != 0) ? rc : len;
+}
+
+static struct subsys_attribute reipl_type_attr =
+ __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
+
+static decl_subsys(reipl, NULL, NULL);
+
+/*
+ * dump section
+ */
+
+/* FCP dump device attributes */
+
+DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
+ dump_block_fcp->ipl_info.fcp.wwpn);
+DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
+ dump_block_fcp->ipl_info.fcp.lun);
+DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
+ dump_block_fcp->ipl_info.fcp.bootprog);
+DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
+ dump_block_fcp->ipl_info.fcp.br_lba);
+DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
+ dump_block_fcp->ipl_info.fcp.devno);
+
+static struct attribute *dump_fcp_attrs[] = {
+ &sys_dump_fcp_device_attr.attr,
+ &sys_dump_fcp_wwpn_attr.attr,
+ &sys_dump_fcp_lun_attr.attr,
+ &sys_dump_fcp_bootprog_attr.attr,
+ &sys_dump_fcp_br_lba_attr.attr,
+ NULL,
+};
+
+static struct attribute_group dump_fcp_attr_group = {
+ .name = IPL_FCP_STR,
+ .attrs = dump_fcp_attrs,
+};
+
+/* CCW dump device attributes */
+
+DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
+ dump_block_ccw->ipl_info.ccw.devno);
+
+static struct attribute *dump_ccw_attrs[] = {
+ &sys_dump_ccw_device_attr.attr,
+ NULL,
+};
+
+static struct attribute_group dump_ccw_attr_group = {
+ .name = IPL_CCW_STR,
+ .attrs = dump_ccw_attrs,
+};
+
+/* dump type */
+
+static int dump_set_type(enum ipl_type type)
+{
+ if (!(dump_capabilities & type))
+ return -EINVAL;
+ switch(type) {
+ case IPL_TYPE_CCW:
+ if (MACHINE_IS_VM)
+ dump_method = IPL_METHOD_CCW_VM;
+ else
+ dump_method = IPL_METHOD_CCW_CIO;
+ break;
+ case IPL_TYPE_FCP:
+ dump_method = IPL_METHOD_FCP_RW_DIAG;
+ break;
+ default:
+ dump_method = IPL_METHOD_NONE;
+ }
+ dump_type = type;
+ return 0;
+}
+
+static ssize_t dump_type_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%s\n", ipl_type_str(dump_type));
+}
+
+static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
+ size_t len)
+{
+ int rc = -EINVAL;
+
+ if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0)
+ rc = dump_set_type(IPL_TYPE_NONE);
+ else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
+ rc = dump_set_type(IPL_TYPE_CCW);
+ else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
+ rc = dump_set_type(IPL_TYPE_FCP);
+ return (rc != 0) ? rc : len;
+}
+
+static struct subsys_attribute dump_type_attr =
+ __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
+
+static decl_subsys(dump, NULL, NULL);
+
+#ifdef CONFIG_SMP
+static void dump_smp_stop_all(void)
+{
+ int cpu;
+ preempt_disable();
+ for_each_online_cpu(cpu) {
+ if (cpu == smp_processor_id())
+ continue;
+ while (signal_processor(cpu, sigp_stop) == sigp_busy)
+ udelay(10);
+ }
+ preempt_enable();
+}
+#else
+#define dump_smp_stop_all() do { } while (0)
+#endif
+
+/*
+ * Shutdown actions section
+ */
+
+static decl_subsys(shutdown_actions, NULL, NULL);
+
+/* on panic */
+
+static ssize_t on_panic_show(struct subsystem *subsys, char *page)
+{
+ return sprintf(page, "%s\n", shutdown_action_str(on_panic_action));
+}
+
+static ssize_t on_panic_store(struct subsystem *subsys, const char *buf,
+ size_t len)
+{
+ if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0)
+ on_panic_action = SHUTDOWN_REIPL;
+ else if (strncmp(buf, SHUTDOWN_DUMP_STR,
+ strlen(SHUTDOWN_DUMP_STR)) == 0)
+ on_panic_action = SHUTDOWN_DUMP;
+ else if (strncmp(buf, SHUTDOWN_STOP_STR,
+ strlen(SHUTDOWN_STOP_STR)) == 0)
+ on_panic_action = SHUTDOWN_STOP;
+ else
+ return -EINVAL;
+
+ return len;
+}
+
+static struct subsys_attribute on_panic_attr =
+ __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
+
+static void print_fcp_block(struct ipl_parameter_block *fcp_block)
+{
+ printk(KERN_EMERG "wwpn: %016llx\n",
+ (unsigned long long)fcp_block->ipl_info.fcp.wwpn);
+ printk(KERN_EMERG "lun: %016llx\n",
+ (unsigned long long)fcp_block->ipl_info.fcp.lun);
+ printk(KERN_EMERG "bootprog: %lld\n",
+ (unsigned long long)fcp_block->ipl_info.fcp.bootprog);
+ printk(KERN_EMERG "br_lba: %lld\n",
+ (unsigned long long)fcp_block->ipl_info.fcp.br_lba);
+ printk(KERN_EMERG "device: %llx\n",
+ (unsigned long long)fcp_block->ipl_info.fcp.devno);
+ printk(KERN_EMERG "opt: %x\n", fcp_block->ipl_info.fcp.opt);
+}
+
+void do_reipl(void)
+{
+ struct ccw_dev_id devid;
+ static char buf[100];
+
+ switch (reipl_type) {
+ case IPL_TYPE_CCW:
+ printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
+ reipl_block_ccw->ipl_info.ccw.devno);
+ break;
+ case IPL_TYPE_FCP:
+ printk(KERN_EMERG "reboot on fcp device:\n");
+ print_fcp_block(reipl_block_fcp);
+ break;
+ default:
+ break;
+ }
+
+ switch (reipl_method) {
+ case IPL_METHOD_CCW_CIO:
+ devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
+ devid.ssid = 0;
+ reipl_ccw_dev(&devid);
+ break;
+ case IPL_METHOD_CCW_VM:
+ sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno);
+ cpcmd(buf, NULL, 0, NULL);
+ break;
+ case IPL_METHOD_CCW_DIAG:
+ diag308(DIAG308_SET, reipl_block_ccw);
+ diag308(DIAG308_IPL, NULL);
+ break;
+ case IPL_METHOD_FCP_RW_DIAG:
+ diag308(DIAG308_SET, reipl_block_fcp);
+ diag308(DIAG308_IPL, NULL);
+ break;
+ case IPL_METHOD_FCP_RO_DIAG:
+ diag308(DIAG308_IPL, NULL);
+ break;
+ case IPL_METHOD_FCP_RO_VM:
+ cpcmd("IPL", NULL, 0, NULL);
+ break;
+ case IPL_METHOD_NONE:<