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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-03-26 10:24:01 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-03-26 10:24:10 -0400
commitf5daba1d4116d964435ddd99f32b6c80448a496b (patch)
tree0c4ace40971e9cc455b556a3d5691b64a24044b5
parent70193af9188113c9b4ff3dde1aed9f9c8f7c4f93 (diff)
[S390] split/move machine check handler code
Split machine check handler code and move it to cio and kernel code where it belongs to. No functional change. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat
-rw-r--r--arch/s390/include/asm/crw.h68
-rw-r--r--arch/s390/include/asm/nmi.h66
-rw-r--r--arch/s390/kernel/Makefile2
-rw-r--r--arch/s390/kernel/nmi.c (renamed from drivers/s390/s390mach.c)246
-rw-r--r--arch/s390/kernel/process.c2
-rw-r--r--arch/s390/kvm/kvm-s390.c4
-rw-r--r--drivers/s390/Makefile1
-rw-r--r--drivers/s390/cio/Makefile2
-rw-r--r--drivers/s390/cio/chp.c6
-rw-r--r--drivers/s390/cio/chsc.c6
-rw-r--r--drivers/s390/cio/cio.c3
-rw-r--r--drivers/s390/cio/crw.c145
-rw-r--r--drivers/s390/cio/css.c6
-rw-r--r--drivers/s390/s390mach.h122
14 files changed, 340 insertions, 339 deletions
diff --git a/arch/s390/include/asm/crw.h b/arch/s390/include/asm/crw.h
new file mode 100644
index 000000000000..2185a6d619d3
--- /dev/null
+++ b/arch/s390/include/asm/crw.h
@@ -0,0 +1,68 @@
1/*
2 * Data definitions for channel report processing
3 * Copyright IBM Corp. 2000,2009
4 * Author(s): Ingo Adlung <adlung@de.ibm.com>,
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
6 * Cornelia Huck <cornelia.huck@de.ibm.com>,
7 * Heiko Carstens <heiko.carstens@de.ibm.com>,
8 */
9
10#ifndef _ASM_S390_CRW_H
11#define _ASM_S390_CRW_H
12
13#include <linux/types.h>
14
15/*
16 * Channel Report Word
17 */
18struct crw {
19 __u32 res1 : 1; /* reserved zero */
20 __u32 slct : 1; /* solicited */
21 __u32 oflw : 1; /* overflow */
22 __u32 chn : 1; /* chained */
23 __u32 rsc : 4; /* reporting source code */
24 __u32 anc : 1; /* ancillary report */
25 __u32 res2 : 1; /* reserved zero */
26 __u32 erc : 6; /* error-recovery code */
27 __u32 rsid : 16; /* reporting-source ID */
28} __attribute__ ((packed));
29
30typedef void (*crw_handler_t)(struct crw *, struct crw *, int);
31
32extern int crw_register_handler(int rsc, crw_handler_t handler);
33extern void crw_unregister_handler(int rsc);
34extern void crw_handle_channel_report(void);
35
36#define NR_RSCS 16
37
38#define CRW_RSC_MONITOR 0x2 /* monitoring facility */
39#define CRW_RSC_SCH 0x3 /* subchannel */
40#define CRW_RSC_CPATH 0x4 /* channel path */
41#define CRW_RSC_CONFIG 0x9 /* configuration-alert facility */
42#define CRW_RSC_CSS 0xB /* channel subsystem */
43
44#define CRW_ERC_EVENT 0x00 /* event information pending */
45#define CRW_ERC_AVAIL 0x01 /* available */
46#define CRW_ERC_INIT 0x02 /* initialized */
47#define CRW_ERC_TERROR 0x03 /* temporary error */
48#define CRW_ERC_IPARM 0x04 /* installed parm initialized */
49#define CRW_ERC_TERM 0x05 /* terminal */
50#define CRW_ERC_PERRN 0x06 /* perm. error, fac. not init */
51#define CRW_ERC_PERRI 0x07 /* perm. error, facility init */
52#define CRW_ERC_PMOD 0x08 /* installed parameters modified */
53
54static inline int stcrw(struct crw *pcrw)
55{
56 int ccode;
57
58 asm volatile(
59 " stcrw 0(%2)\n"
60 " ipm %0\n"
61 " srl %0,28\n"
62 : "=d" (ccode), "=m" (*pcrw)
63 : "a" (pcrw)
64 : "cc" );
65 return ccode;
66}
67
68#endif /* _ASM_S390_CRW_H */
diff --git a/arch/s390/include/asm/nmi.h b/arch/s390/include/asm/nmi.h
new file mode 100644
index 000000000000..f4b60441adca
--- /dev/null
+++ b/arch/s390/include/asm/nmi.h
@@ -0,0 +1,66 @@
1/*
2 * Machine check handler definitions
3 *
4 * Copyright IBM Corp. 2000,2009
5 * Author(s): Ingo Adlung <adlung@de.ibm.com>,
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
7 * Cornelia Huck <cornelia.huck@de.ibm.com>,
8 * Heiko Carstens <heiko.carstens@de.ibm.com>,
9 */
10
11#ifndef _ASM_S390_NMI_H
12#define _ASM_S390_NMI_H
13
14#include <linux/types.h>
15
16struct mci {
17 __u32 sd : 1; /* 00 system damage */
18 __u32 pd : 1; /* 01 instruction-processing damage */
19 __u32 sr : 1; /* 02 system recovery */
20 __u32 : 1; /* 03 */
21 __u32 cd : 1; /* 04 timing-facility damage */
22 __u32 ed : 1; /* 05 external damage */
23 __u32 : 1; /* 06 */
24 __u32 dg : 1; /* 07 degradation */
25 __u32 w : 1; /* 08 warning pending */
26 __u32 cp : 1; /* 09 channel-report pending */
27 __u32 sp : 1; /* 10 service-processor damage */
28 __u32 ck : 1; /* 11 channel-subsystem damage */
29 __u32 : 2; /* 12-13 */
30 __u32 b : 1; /* 14 backed up */
31 __u32 : 1; /* 15 */
32 __u32 se : 1; /* 16 storage error uncorrected */
33 __u32 sc : 1; /* 17 storage error corrected */
34 __u32 ke : 1; /* 18 storage-key error uncorrected */
35 __u32 ds : 1; /* 19 storage degradation */
36 __u32 wp : 1; /* 20 psw mwp validity */
37 __u32 ms : 1; /* 21 psw mask and key validity */
38 __u32 pm : 1; /* 22 psw program mask and cc validity */
39 __u32 ia : 1; /* 23 psw instruction address validity */
40 __u32 fa : 1; /* 24 failing storage address validity */
41 __u32 : 1; /* 25 */
42 __u32 ec : 1; /* 26 external damage code validity */
43 __u32 fp : 1; /* 27 floating point register validity */
44 __u32 gr : 1; /* 28 general register validity */
45 __u32 cr : 1; /* 29 control register validity */
46 __u32 : 1; /* 30 */
47 __u32 st : 1; /* 31 storage logical validity */
48 __u32 ie : 1; /* 32 indirect storage error */
49 __u32 ar : 1; /* 33 access register validity */
50 __u32 da : 1; /* 34 delayed access exception */
51 __u32 : 7; /* 35-41 */
52 __u32 pr : 1; /* 42 tod programmable register validity */
53 __u32 fc : 1; /* 43 fp control register validity */
54 __u32 ap : 1; /* 44 ancillary report */
55 __u32 : 1; /* 45 */
56 __u32 ct : 1; /* 46 cpu timer validity */
57 __u32 cc : 1; /* 47 clock comparator validity */
58 __u32 : 16; /* 47-63 */
59};
60
61struct pt_regs;
62
63extern void s390_handle_mcck(void);
64extern void s390_do_machine_check(struct pt_regs *regs);
65
66#endif /* _ASM_S390_NMI_H */
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 33e7aee70513..228e3105ded7 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -22,7 +22,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
22obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \ 22obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \
23 processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \ 23 processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
24 s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \ 24 s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
25 vdso.o vtime.o sysinfo.o 25 vdso.o vtime.o sysinfo.o nmi.o
26 26
27obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o) 27obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
28obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o) 28obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
diff --git a/drivers/s390/s390mach.c b/arch/s390/kernel/nmi.c
index 8e437052e076..8d50eaf76a60 100644
--- a/drivers/s390/s390mach.c
+++ b/arch/s390/kernel/nmi.c
@@ -1,137 +1,23 @@
1/* 1/*
2 * drivers/s390/s390mach.c 2 * Machine check handler
3 * S/390 machine check handler
4 * 3 *
5 * Copyright IBM Corp. 2000,2008 4 * Copyright IBM Corp. 2000,2009
6 * Author(s): Ingo Adlung (adlung@de.ibm.com) 5 * Author(s): Ingo Adlung <adlung@de.ibm.com>,
7 * Martin Schwidefsky (schwidefsky@de.ibm.com) 6 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
8 * Cornelia Huck <cornelia.huck@de.ibm.com> 7 * Cornelia Huck <cornelia.huck@de.ibm.com>,
8 * Heiko Carstens <heiko.carstens@de.ibm.com>,
9 */ 9 */
10 10
11#include <linux/init.h> 11#include <linux/init.h>
12#include <linux/sched.h>
13#include <linux/errno.h> 12#include <linux/errno.h>
14#include <linux/workqueue.h>
15#include <linux/time.h> 13#include <linux/time.h>
16#include <linux/device.h> 14#include <linux/module.h>
17#include <linux/kthread.h>
18#include <asm/etr.h>
19#include <asm/lowcore.h> 15#include <asm/lowcore.h>
20#include <asm/cio.h> 16#include <asm/smp.h>
17#include <asm/etr.h>
21#include <asm/cpu.h> 18#include <asm/cpu.h>
22#include "s390mach.h" 19#include <asm/nmi.h>
23 20#include <asm/crw.h>
24static struct semaphore m_sem;
25
26static NORET_TYPE void
27s390_handle_damage(char *msg)
28{
29#ifdef CONFIG_SMP
30 smp_send_stop();
31#endif
32 disabled_wait((unsigned long) __builtin_return_address(0));
33 for(;;);
34}
35
36static crw_handler_t crw_handlers[NR_RSCS];
37
38/**
39 * s390_register_crw_handler() - register a channel report word handler
40 * @rsc: reporting source code to handle
41 * @handler: handler to be registered
42 *
43 * Returns %0 on success and a negative error value otherwise.
44 */
45int s390_register_crw_handler(int rsc, crw_handler_t handler)
46{
47 if ((rsc < 0) || (rsc >= NR_RSCS))
48 return -EINVAL;
49 if (!cmpxchg(&crw_handlers[rsc], NULL, handler))
50 return 0;
51 return -EBUSY;
52}
53
54/**
55 * s390_unregister_crw_handler() - unregister a channel report word handler
56 * @rsc: reporting source code to handle
57 */
58void s390_unregister_crw_handler(int rsc)
59{
60 if ((rsc < 0) || (rsc >= NR_RSCS))
61 return;
62 xchg(&crw_handlers[rsc], NULL);
63 synchronize_sched();
64}
65
66/*
67 * Retrieve CRWs and call function to handle event.
68 */
69static int s390_collect_crw_info(void *param)
70{
71 struct crw crw[2];
72 int ccode;
73 struct semaphore *sem;
74 unsigned int chain;
75 int ignore;
76
77 sem = (struct semaphore *)param;
78repeat:
79 ignore = down_interruptible(sem);
80 chain = 0;
81 while (1) {
82 if (unlikely(chain > 1)) {
83 struct crw tmp_crw;
84
85 printk(KERN_WARNING"%s: Code does not support more "
86 "than two chained crws; please report to "
87 "linux390@de.ibm.com!\n", __func__);
88 ccode = stcrw(&tmp_crw);
89 printk(KERN_WARNING"%s: crw reports slct=%d, oflw=%d, "
90 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
91 __func__, tmp_crw.slct, tmp_crw.oflw,
92 tmp_crw.chn, tmp_crw.rsc, tmp_crw.anc,
93 tmp_crw.erc, tmp_crw.rsid);
94 printk(KERN_WARNING"%s: This was crw number %x in the "
95 "chain\n", __func__, chain);
96 if (ccode != 0)
97 break;
98 chain = tmp_crw.chn ? chain + 1 : 0;
99 continue;
100 }
101 ccode = stcrw(&crw[chain]);
102 if (ccode != 0)
103 break;
104 printk(KERN_DEBUG "crw_info : CRW reports slct=%d, oflw=%d, "
105 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
106 crw[chain].slct, crw[chain].oflw, crw[chain].chn,
107 crw[chain].rsc, crw[chain].anc, crw[chain].erc,
108 crw[chain].rsid);
109 /* Check for overflows. */
110 if (crw[chain].oflw) {
111 int i;
112
113 pr_debug("%s: crw overflow detected!\n", __func__);
114 for (i = 0; i < NR_RSCS; i++) {
115 if (crw_handlers[i])
116 crw_handlers[i](NULL, NULL, 1);
117 }
118 chain = 0;
119 continue;
120 }
121 if (crw[0].chn && !chain) {
122 chain++;
123 continue;
124 }
125 if (crw_handlers[crw[chain].rsc])
126 crw_handlers[crw[chain].rsc](&crw[0],
127 chain ? &crw[1] : NULL,
128 0);
129 /* chain is always 0 or 1 here. */
130 chain = crw[chain].chn ? chain + 1 : 0;
131 }
132 goto repeat;
133 return 0;
134}
135 21
136struct mcck_struct { 22struct mcck_struct {
137 int kill_task; 23 int kill_task;
@@ -142,12 +28,18 @@ struct mcck_struct {
142 28
143static DEFINE_PER_CPU(struct mcck_struct, cpu_mcck); 29static DEFINE_PER_CPU(struct mcck_struct, cpu_mcck);
144 30
31static NORET_TYPE void s390_handle_damage(char *msg)
32{
33 smp_send_stop();
34 disabled_wait((unsigned long) __builtin_return_address(0));
35 while (1);
36}
37
145/* 38/*
146 * Main machine check handler function. Will be called with interrupts enabled 39 * Main machine check handler function. Will be called with interrupts enabled
147 * or disabled and machine checks enabled or disabled. 40 * or disabled and machine checks enabled or disabled.
148 */ 41 */
149void 42void s390_handle_mcck(void)
150s390_handle_mcck(void)
151{ 43{
152 unsigned long flags; 44 unsigned long flags;
153 struct mcck_struct mcck; 45 struct mcck_struct mcck;
@@ -166,7 +58,7 @@ s390_handle_mcck(void)
166 local_irq_restore(flags); 58 local_irq_restore(flags);
167 59
168 if (mcck.channel_report) 60 if (mcck.channel_report)
169 up(&m_sem); 61 crw_handle_channel_report();
170 62
171#ifdef CONFIG_MACHCHK_WARNING 63#ifdef CONFIG_MACHCHK_WARNING
172/* 64/*
@@ -204,8 +96,7 @@ EXPORT_SYMBOL_GPL(s390_handle_mcck);
204 * returns 0 if all registers could be validated 96 * returns 0 if all registers could be validated
205 * returns 1 otherwise 97 * returns 1 otherwise
206 */ 98 */
207static int 99static int notrace s390_revalidate_registers(struct mci *mci)
208s390_revalidate_registers(struct mci *mci)
209{ 100{
210 int kill_task; 101 int kill_task;
211 u64 tmpclock; 102 u64 tmpclock;
@@ -214,22 +105,21 @@ s390_revalidate_registers(struct mci *mci)
214 105
215 kill_task = 0; 106 kill_task = 0;
216 zero = 0; 107 zero = 0;
217 /* General purpose registers */ 108
218 if (!mci->gr) 109 if (!mci->gr) {
219 /* 110 /*
220 * General purpose registers couldn't be restored and have 111 * General purpose registers couldn't be restored and have
221 * unknown contents. Process needs to be terminated. 112 * unknown contents. Process needs to be terminated.
222 */ 113 */
223 kill_task = 1; 114 kill_task = 1;
224 115 }
225 /* Revalidate floating point registers */ 116 if (!mci->fp) {
226 if (!mci->fp)
227 /* 117 /*
228 * Floating point registers can't be restored and 118 * Floating point registers can't be restored and
229 * therefore the process needs to be terminated. 119 * therefore the process needs to be terminated.
230 */ 120 */
231 kill_task = 1; 121 kill_task = 1;
232 122 }
233#ifndef CONFIG_64BIT 123#ifndef CONFIG_64BIT
234 asm volatile( 124 asm volatile(
235 " ld 0,0(%0)\n" 125 " ld 0,0(%0)\n"
@@ -245,9 +135,8 @@ s390_revalidate_registers(struct mci *mci)
245 fpt_creg_save_area = &S390_lowcore.fpt_creg_save_area; 135 fpt_creg_save_area = &S390_lowcore.fpt_creg_save_area;
246#else 136#else
247 fpt_save_area = (void *) S390_lowcore.extended_save_area_addr; 137 fpt_save_area = (void *) S390_lowcore.extended_save_area_addr;
248 fpt_creg_save_area = fpt_save_area+128; 138 fpt_creg_save_area = fpt_save_area + 128;
249#endif 139#endif
250 /* Floating point control register */
251 if (!mci->fc) { 140 if (!mci->fc) {
252 /* 141 /*
253 * Floating point control register can't be restored. 142 * Floating point control register can't be restored.
@@ -278,26 +167,25 @@ s390_revalidate_registers(struct mci *mci)
278 " ld 15,120(%0)\n" 167 " ld 15,120(%0)\n"
279 : : "a" (fpt_save_area)); 168 : : "a" (fpt_save_area));
280 } 169 }
281
282 /* Revalidate access registers */ 170 /* Revalidate access registers */
283 asm volatile( 171 asm volatile(
284 " lam 0,15,0(%0)" 172 " lam 0,15,0(%0)"
285 : : "a" (&S390_lowcore.access_regs_save_area)); 173 : : "a" (&S390_lowcore.access_regs_save_area));
286 if (!mci->ar) 174 if (!mci->ar) {
287 /* 175 /*
288 * Access registers have unknown contents. 176 * Access registers have unknown contents.
289 * Terminating task. 177 * Terminating task.
290 */ 178 */
291 kill_task = 1; 179 kill_task = 1;
292 180 }
293 /* Revalidate control registers */ 181 /* Revalidate control registers */
294 if (!mci->cr) 182 if (!mci->cr) {
295 /* 183 /*
296 * Control registers have unknown contents. 184 * Control registers have unknown contents.
297 * Can't recover and therefore stopping machine. 185 * Can't recover and therefore stopping machine.
298 */ 186 */
299 s390_handle_damage("invalid control registers."); 187 s390_handle_damage("invalid control registers.");
300 else 188 } else {
301#ifdef CONFIG_64BIT 189#ifdef CONFIG_64BIT
302 asm volatile( 190 asm volatile(
303 " lctlg 0,15,0(%0)" 191 " lctlg 0,15,0(%0)"
@@ -307,12 +195,11 @@ s390_revalidate_registers(struct mci *mci)
307 " lctl 0,15,0(%0)" 195 " lctl 0,15,0(%0)"
308 : : "a" (&S390_lowcore.cregs_save_area)); 196 : : "a" (&S390_lowcore.cregs_save_area));
309#endif 197#endif
310 198 }
311 /* 199 /*
312 * We don't even try to revalidate the TOD register, since we simply 200 * We don't even try to revalidate the TOD register, since we simply
313 * can't write something sensible into that register. 201 * can't write something sensible into that register.
314 */ 202 */
315
316#ifdef CONFIG_64BIT 203#ifdef CONFIG_64BIT
317 /* 204 /*
318 * See if we can revalidate the TOD programmable register with its 205 * See if we can revalidate the TOD programmable register with its
@@ -330,7 +217,6 @@ s390_revalidate_registers(struct mci *mci)
330 : : "a" (&S390_lowcore.tod_progreg_save_area) 217 : : "a" (&S390_lowcore.tod_progreg_save_area)
331 : "0", "cc"); 218 : "0", "cc");
332#endif 219#endif
333
334 /* Revalidate clock comparator register */ 220 /* Revalidate clock comparator register */
335 asm volatile( 221 asm volatile(
336 " stck 0(%1)\n" 222 " stck 0(%1)\n"
@@ -354,31 +240,35 @@ s390_revalidate_registers(struct mci *mci)
354#define MAX_IPD_COUNT 29 240#define MAX_IPD_COUNT 29
355#define MAX_IPD_TIME (5 * 60 * USEC_PER_SEC) /* 5 minutes */ 241#define MAX_IPD_TIME (5 * 60 * USEC_PER_SEC) /* 5 minutes */
356 242
243#define ED_STP_ISLAND 6 /* External damage STP island check */
244#define ED_STP_SYNC 7 /* External damage STP sync check */
245#define ED_ETR_SYNC 12 /* External damage ETR sync check */
246#define ED_ETR_SWITCH 13 /* External damage ETR switch to local */
247
357/* 248/*
358 * machine check handler. 249 * machine check handler.
359 */ 250 */
360void notrace s390_do_machine_check(struct pt_regs *regs) 251void notrace s390_do_machine_check(struct pt_regs *regs)
361{ 252{
253 static int ipd_count;
362 static DEFINE_SPINLOCK(ipd_lock); 254 static DEFINE_SPINLOCK(ipd_lock);
363 static unsigned long long last_ipd; 255 static unsigned long long last_ipd;
364 static int ipd_count; 256 struct mcck_struct *mcck;
365 unsigned long long tmp; 257 unsigned long long tmp;
366 struct mci *mci; 258 struct mci *mci;
367 struct mcck_struct *mcck;
368 int umode; 259 int umode;
369 260
370 lockdep_off(); 261 lockdep_off();
371
372 s390_idle_check(); 262 s390_idle_check();
373 263
374 mci = (struct mci *) &S390_lowcore.mcck_interruption_code; 264 mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
375 mcck = &__get_cpu_var(cpu_mcck); 265 mcck = &__get_cpu_var(cpu_mcck);
376 umode = user_mode(regs); 266 umode = user_mode(regs);
377 267
378 if (mci->sd) 268 if (mci->sd) {
379 /* System damage -> stopping machine */ 269 /* System damage -> stopping machine */
380 s390_handle_damage("received system damage machine check."); 270 s390_handle_damage("received system damage machine check.");
381 271 }
382 if (mci->pd) { 272 if (mci->pd) {
383 if (mci->b) { 273 if (mci->b) {
384 /* Processing backup -> verify if we can survive this */ 274 /* Processing backup -> verify if we can survive this */
@@ -408,24 +298,17 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
408 * Nullifying exigent condition, therefore we might 298 * Nullifying exigent condition, therefore we might
409 * retry this instruction. 299 * retry this instruction.
410 */ 300 */
411
412 spin_lock(&ipd_lock); 301 spin_lock(&ipd_lock);
413
414 tmp = get_clock(); 302 tmp = get_clock();
415
416 if (((tmp - last_ipd) >> 12) < MAX_IPD_TIME) 303 if (((tmp - last_ipd) >> 12) < MAX_IPD_TIME)
417 ipd_count++; 304 ipd_count++;
418 else 305 else
419 ipd_count = 1; 306 ipd_count = 1;
420
421 last_ipd = tmp; 307 last_ipd = tmp;
422
423 if (ipd_count == MAX_IPD_COUNT) 308 if (ipd_count == MAX_IPD_COUNT)
424 s390_handle_damage("too many ipd retries."); 309 s390_handle_damage("too many ipd retries.");
425
426 spin_unlock(&ipd_lock); 310 spin_unlock(&ipd_lock);
427 } 311 } else {
428 else {
429 /* Processing damage -> stopping machine */ 312 /* Processing damage -> stopping machine */
430 s390_handle_damage("received instruction processing " 313 s390_handle_damage("received instruction processing "
431 "damage machine check."); 314 "damage machine check.");
@@ -440,20 +323,18 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
440 mcck->kill_task = 1; 323 mcck->kill_task = 1;
441 mcck->mcck_code = *(unsigned long long *) mci; 324 mcck->mcck_code = *(unsigned long long *) mci;
442 set_thread_flag(TIF_MCCK_PENDING); 325 set_thread_flag(TIF_MCCK_PENDING);
443 } 326 } else {
444 else
445 /* 327 /*
446 * Couldn't restore all register contents while in 328 * Couldn't restore all register contents while in
447 * kernel mode -> stopping machine. 329 * kernel mode -> stopping machine.
448 */ 330 */
449 s390_handle_damage("unable to revalidate registers."); 331 s390_handle_damage("unable to revalidate registers.");
332 }
450 } 333 }
451
452 if (mci->cd) { 334 if (mci->cd) {
453 /* Timing facility damage */ 335 /* Timing facility damage */
454 s390_handle_damage("TOD clock damaged"); 336 s390_handle_damage("TOD clock damaged");
455 } 337 }
456
457 if (mci->ed && mci->ec) { 338 if (mci->ed && mci->ec) {
458 /* External damage */ 339 /* External damage */
459 if (S390_lowcore.external_damage_code & (1U << ED_ETR_SYNC)) 340 if (S390_lowcore.external_damage_code & (1U << ED_ETR_SYNC))
@@ -465,28 +346,23 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
465 if (S390_lowcore.external_damage_code & (1U << ED_STP_ISLAND)) 346 if (S390_lowcore.external_damage_code & (1U << ED_STP_ISLAND))
466 stp_island_check(); 347 stp_island_check();
467 } 348 }
468
469 if (mci->se) 349 if (mci->se)
470 /* Storage error uncorrected */ 350 /* Storage error uncorrected */
471 s390_handle_damage("received storage error uncorrected " 351 s390_handle_damage("received storage error uncorrected "
472 "machine check."); 352 "machine check.");
473
474 if (mci->ke) 353 if (mci->ke)
475 /* Storage key-error uncorrected */ 354 /* Storage key-error uncorrected */
476 s390_handle_damage("received storage key-error uncorrected " 355 s390_handle_damage("received storage key-error uncorrected "
477 "machine check."); 356 "machine check.");
478
479 if (mci->ds && mci->fa) 357 if (mci->ds && mci->fa)
480 /* Storage degradation */ 358 /* Storage degradation */
481 s390_handle_damage("received storage degradation machine " 359 s390_handle_damage("received storage degradation machine "
482 "check."); 360 "check.");
483
484 if (mci->cp) { 361 if (mci->cp) {
485 /* Channel report word pending */ 362 /* Channel report word pending */
486 mcck->channel_report = 1; 363 mcck->channel_report = 1;
487 set_thread_flag(TIF_MCCK_PENDING); 364 set_thread_flag(TIF_MCCK_PENDING);
488 } 365 }
489
490 if (mci->w) { 366 if (mci->w) {
491 /* Warning pending */ 367 /* Warning pending */
492 mcck->warning = 1; 368 mcck->warning = 1;
@@ -495,43 +371,13 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
495 lockdep_on(); 371 lockdep_on();
496} 372}
497 373
498/* 374static int __init machine_check_init(void)
499 * s390_init_machine_check
500 *
501 * initialize machine check handling
502 */
503static int
504machine_check_init(void)
505{ 375{
506 init_MUTEX_LOCKED(&m_sem);
507 ctl_set_bit(14, 25); /* enable external damage MCH */ 376 ctl_set_bit(14, 25); /* enable external damage MCH */
508 ctl_set_bit(14, 27); /* enable system recovery MCH */ 377 ctl_set_bit(14, 27); /* enable system recovery MCH */
509#ifdef CONFIG_MACHCHK_WARNING 378#ifdef CONFIG_MACHCHK_WARNING
510 ctl_set_bit(14, 24); /* enable warning MCH */ 379 ctl_set_bit(14, 24); /* enable warning MCH */
511#endif 380#endif
512 return 0; 381 return 0;
513} 382}
514
515/*
516 * Initialize the machine check handler really early to be able to
517 * catch all machine checks that happen during boot
518 */
519arch_initcall(machine_check_init); 383arch_initcall(machine_check_init);
520
521/*
522 * Machine checks for the channel subsystem must be enabled
523 * after the channel subsystem is initialized
524 */
525static int __init
526machine_check_crw_init (void)
527{
528 struct task_struct *task;
529
530 task = kthread_run(s390_collect_crw_info, &m_sem, "kmcheck");
531 if (IS_ERR(task))
532 return PTR_ERR(task);
533 ctl_set_bit(14, 28); /* enable channel report MCH */
534 return 0;
535}
536
537device_initcall (machine_check_crw_init);
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index e6b480625cb3..bd616fb31e75 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -39,6 +39,7 @@
39#include <asm/processor.h> 39#include <asm/processor.h>
40#include <asm/irq.h> 40#include <asm/irq.h>
41#include <asm/timer.h> 41#include <asm/timer.h>
42#include <asm/nmi.h>
42#include "entry.h" 43#include "entry.h"
43 44
44asmlinkage void ret_from_fork(void) asm ("ret_from_fork"); 45asmlinkage void ret_from_fork(void) asm ("ret_from_fork");
@@ -68,7 +69,6 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
68 return sf->gprs[8]; 69 return sf->gprs[8];
69} 70}
70 71
71extern void s390_handle_mcck(void);
72/* 72/*
73 * The idle loop on a S390... 73 * The idle loop on a S390...
74 */ 74 */
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index c55a4b9ffd88..caa4d2877016 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -23,7 +23,7 @@
23#include <linux/timer.h> 23#include <linux/timer.h>
24#include <asm/lowcore.h> 24#include <asm/lowcore.h>
25#include <asm/pgtable.h> 25#include <asm/pgtable.h>
26 26#include <asm/nmi.h>
27#include "kvm-s390.h" 27#include "kvm-s390.h"
28#include "gaccess.h" 28#include "gaccess.h"
29 29
@@ -440,8 +440,6 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
440 return -EINVAL; /* not implemented yet */ 440 return -EINVAL; /* not implemented yet */
441} 441}
442 442
443extern void s390_handle_mcck(void);
444
445static void __vcpu_run(struct kvm_vcpu *vcpu) 443static void __vcpu_run(struct kvm_vcpu *vcpu)
446{ 444{
447 memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); 445 memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16);
diff --git a/drivers/s390/Makefile b/drivers/s390/Makefile
index 0828dc839355..95bccfd3f169 100644
--- a/drivers/s390/Makefile
+++ b/drivers/s390/Makefile
@@ -2,7 +2,6 @@
2# Makefile for the S/390 specific device drivers 2# Makefile for the S/390 specific device drivers
3# 3#
4 4
5obj-y += s390mach.o
6obj-y += cio/ block/ char/ crypto/ net/ scsi/ kvm/ 5obj-y += cio/ block/ char/ crypto/ net/ scsi/ kvm/
7 6
8drivers-y += drivers/s390/built-in.o 7drivers-y += drivers/s390/built-in.o
diff --git a/drivers/s390/cio/Makefile b/drivers/s390/cio/Makefile
index bd79bd165396..adb3dd301528 100644
--- a/drivers/s390/cio/Makefile
+++ b/drivers/s390/cio/Makefile
@@ -3,7 +3,7 @@
3# 3#
4 4
5obj-y += airq.o blacklist.o chsc.o cio.o css.o chp.o idset.o isc.o scsw.o \ 5obj-y += airq.o blacklist.o chsc.o cio.o css.o chp.o idset.o isc.o scsw.o \
6 fcx.o itcw.o 6 fcx.o itcw.o crw.o
7ccw_device-objs += device.o device_fsm.o device_ops.o 7ccw_device-objs += device.o device_fsm.o device_ops.o
8ccw_device-objs += device_id.o device_pgid.o device_status.o 8ccw_device-objs += device_id.o device_pgid.o device_status.o
9obj-y += ccw_device.o cmf.o 9obj-y += ccw_device.o cmf.o
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
index 1246f61a5338..3e5f304ad88f 100644
--- a/drivers/s390/cio/chp.c
+++ b/drivers/s390/cio/chp.c
@@ -17,8 +17,8 @@
17#include <linux/errno.h> 17#include <linux/errno.h>
18#include <asm/chpid.h> 18#include <asm/chpid.h>
19#include <asm/sclp.h> 19#include <asm/sclp.h>
20#include <asm/crw.h>
20 21
21#include "../s390mach.h"
22#include "cio.h" 22#include "cio.h"
23#include "css.h" 23#include "css.h"
24#include "ioasm.h" 24#include "ioasm.h"
@@ -706,12 +706,12 @@ static int __init chp_init(void)
706 struct chp_id chpid; 706 struct chp_id chpid;
707 int ret; 707 int ret;
708 708
709 ret = s390_register_crw_handler(CRW_RSC_CPATH, chp_process_crw); 709 ret = crw_register_handler(CRW_RSC_CPATH, chp_process_crw);
710 if (ret) 710 if (ret)
711 return ret; 711 return ret;
712 chp_wq = create_singlethread_workqueue("cio_chp"); 712 chp_wq = create_singlethread_workqueue("cio_chp");
713 if (!chp_wq) { 713 if (!chp_wq) {
714 s390_unregister_crw_handler(CRW_RSC_CPATH); 714 crw_unregister_handler(CRW_RSC_CPATH);
715 return -ENOMEM; 715 return -ENOMEM;
716 } 716 }
717 INIT_WORK(&cfg_work, cfg_func); 717 INIT_WORK(&cfg_work, cfg_func);
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index ebab6ea4659b..7399b07a1aeb 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -19,8 +19,8 @@
19#include <asm/cio.h> 19#include <asm/cio.h>
20#include <asm/chpid.h> 20#include <asm/chpid.h>
21#include <asm/chsc.h> 21#include <asm/chsc.h>
22#include <asm/crw.h>
22 23
23#include "../s390mach.h"
24#include "css.h" 24#include "css.h"
25#include "cio.h" 25#include "cio.h"
26#include "cio_debug.h" 26#include "cio_debug.h"
@@ -820,7 +820,7 @@ int __init chsc_alloc_sei_area(void)
820 "chsc machine checks!\n"); 820 "chsc machine checks!\n");
821 return -ENOMEM; 821 return -ENOMEM;
822 } 822 }
823 ret = s390_register_crw_handler(CRW_RSC_CSS, chsc_process_crw); 823 ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
824 if (ret) 824 if (ret)
825 kfree(sei_page); 825 kfree(sei_page);
826 return ret; 826 return ret;
@@ -828,7 +828,7 @@ int __init chsc_alloc_sei_area(void)
828 828
829void __init chsc_free_sei_area(void) 829void __init chsc_free_sei_area(void)
830{ 830{
831 s390_unregister_crw_handler(CRW_RSC_CSS); 831 crw_unregister_handler(CRW_RSC_CSS);
832 kfree(sei_page); 832 kfree(sei_page);
833} 833}
834 834
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 659f8a791656..73135c5e9dfb 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -30,6 +30,8 @@
30#include <asm/isc.h> 30#include <asm/isc.h>
31#include <asm/cpu.h> 31#include <asm/cpu.h>
32#include <asm/fcx.h> 32#include <asm/fcx.h>
33#include <asm/nmi.h>
34#include <asm/crw.h>
33#include "cio.h" 35#include "cio.h"
34#include "css.h" 36#include "css.h"
35#include "chsc.h" 37#include "chsc.h"
@@ -38,7 +40,6 @@
38#include "blacklist.h" 40#include "blacklist.h"
39#include "cio_debug.h" 41#include "cio_debug.h"
40#include "chp.h" 42#include "chp.h"
41#include "../s390mach.h"
42 43
43debug_info_t *cio_debug_msg_id; 44debug_info_t *cio_debug_msg_id;
44debug_info_t *cio_debug_trace_id; 45debug_info_t *cio_debug_trace_id;
diff --git a/drivers/s390/cio/crw.c b/drivers/s390/cio/crw.c
new file mode 100644
index 000000000000..508f88f6420c
--- /dev/null
+++ b/drivers/s390/cio/crw.c
@@ -0,0 +1,145 @@
1/*
2 * Channel report handling code
3 *
4 * Copyright IBM Corp. 2000,2009
5 * Author(s): Ingo Adlung <adlung@de.ibm.com>,
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
7 * Cornelia Huck <cornelia.huck@de.ibm.com>,
8 * Heiko Carstens <heiko.carstens@de.ibm.com>,
9 */
10
11#include <linux/semaphore.h>
12#include <linux/kthread.h>
13#include <linux/init.h>
14#include <asm/crw.h>
15
16static struct semaphore crw_semaphore;
17static crw_handler_t crw_handlers[NR_RSCS];
18
19/**
20 * crw_register_handler() - register a channel report word handler
21 * @rsc: reporting source code to handle
22 * @handler: handler to be registered
23 *
24 * Returns %0 on success and a negative error value otherwise.
25 */
26int crw_register_handler(int rsc, crw_handler_t handler)
27{
28 if ((rsc < 0) || (rsc >= NR_RSCS))
29 return -EINVAL;
30 if (!cmpxchg(&crw_handlers[rsc], NULL, handler))
31 return 0;
32 return -EBUSY;
33}
34
35/**
36 * crw_unregister_handler() - unregister a channel report word handler
37 * @rsc: reporting source code to handle
38 */
39void crw_unregister_handler(int rsc)
40{
41 if ((rsc < 0) || (rsc >= NR_RSCS))
42 return;
43 xchg(&crw_handlers[rsc], NULL);
44 synchronize_sched();
45}
46
47/*
48 * Retrieve CRWs and call function to handle event.
49 */
50static int crw_collect_info(void *unused)
51{
52 struct crw crw[2];
53 int ccode;
54 unsigned int chain;
55 int ignore;
56
57repeat:
58 ignore = down_interruptible(&crw_semaphore);
59 chain = 0;
60 while (1) {
61 if (unlikely(chain > 1)) {
62 struct crw tmp_crw;
63
64 printk(KERN_WARNING"%s: Code does not support more "
65 "than two chained crws; please report to "
66 "linux390@de.ibm.com!\n", __func__);
67 ccode = stcrw(&tmp_crw);
68 printk(KERN_WARNING"%s: crw reports slct=%d, oflw=%d, "
69 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
70 __func__, tmp_crw.slct, tmp_crw.oflw,
71 tmp_crw.chn, tmp_crw.rsc, tmp_crw.anc,
72 tmp_crw.erc, tmp_crw.rsid);
73 printk(KERN_WARNING"%s: This was crw number %x in the "
74 "chain\n", __func__, chain);
75 if (ccode != 0)
76 break;
77 chain = tmp_crw.chn ? chain + 1 : 0;
78 continue;
79 }
80 ccode = stcrw(&crw[chain]);
81 if (ccode != 0)
82 break;
83 printk(KERN_DEBUG "crw_info : CRW reports slct=%d, oflw=%d, "
84 "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
85 crw[chain].slct, crw[chain].oflw, crw[chain].chn,
86 crw[chain].rsc, crw[chain].anc, crw[chain].erc,
87 crw[chain].rsid);
88 /* Check for overflows. */
89 if (crw[chain].oflw) {
90 int i;
91
92 pr_debug("%s: crw overflow detected!\n", __func__);
93 for (i = 0; i < NR_RSCS; i++) {
94 if (crw_handlers[i])
95 crw_handlers[i](NULL, NULL, 1);
96 }
97 chain = 0;
98 continue;
99 }
100 if (crw[0].chn && !chain) {
101 chain++;
102 continue;
103 }
104 if (crw_handlers[crw[chain].rsc])
105 crw_handlers[crw[chain].rsc](&crw[0],
106 chain ? &crw[1] : NULL,
107 0);
108 /* chain is always 0 or 1 here. */
109 chain = crw[chain].chn ? chain + 1 : 0;
110 }
111 goto repeat;
112 return 0;
113}
114
115void crw_handle_channel_report(void)
116{
117 up(&crw_semaphore);
118}
119
120/*
121 * Separate initcall needed for semaphore initialization since
122 * crw_handle_channel_report might be called before crw_machine_check_init.
123 */
124static int __init crw_init_semaphore(void)
125{
126 init_MUTEX_LOCKED(&crw_semaphore);
127 return 0;
128}
129pure_initcall(crw_init_semaphore);
130
131/*
132 * Machine checks for the channel subsystem must be enabled
133 * after the channel subsystem is initialized
134 */
135static int __init crw_machine_check_init(void)
136{
137 struct task_struct *task;
138
139 task = kthread_run(crw_collect_info, NULL, "kmcheck");
140 if (IS_ERR(task))
141 return PTR_ERR(task);
142 ctl_set_bit(14, 28); /* enable channel report MCH */
143 return 0;
144}
145device_initcall(crw_machine_check_init);
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 8019288bc6de..a5fc56371ba8 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -18,8 +18,8 @@
18#include <linux/list.h> 18#include <linux/list.h>
19#include <linux/reboot.h> 19#include <linux/reboot.h>
20#include <asm/isc.h> 20#include <asm/isc.h>
21#include <asm/crw.h>
21 22
22#include "../s390mach.h"
23#include "css.h" 23#include "css.h"
24#include "cio.h" 24#include "cio.h"
25#include "cio_debug.h" 25#include "cio_debug.h"
@@ -765,7 +765,7 @@ init_channel_subsystem (void)
765 if (ret) 765 if (ret)
766 goto out; 766 goto out;
767 767
768 ret = s390_register_crw_handler(CRW_RSC_SCH, css_process_crw); 768 ret = crw_register_handler(CRW_RSC_SCH, css_process_crw);
769 if (ret) 769 if (ret)
770 goto out; 770 goto out;
771 771
@@ -845,7 +845,7 @@ out_unregister:
845out_bus: 845out_bus:
846 bus_unregister(&css_bus_type); 846 bus_unregister(&css_bus_type);
847out: 847out:
848 s390_unregister_crw_handler(CRW_RSC_CSS); 848 crw_unregister_handler(CRW_RSC_CSS);
849 chsc_free_sei_area(); 849 chsc_free_sei_area();
850 kfree(slow_subchannel_set); 850 kfree(slow_subchannel_set);
851 pr_alert("The CSS device driver initialization failed with " 851 pr_alert("The CSS device driver initialization failed with "
diff --git a/drivers/s390/s390mach.h b/drivers/s390/s390mach.h
deleted file mode 100644
index d39f8b697d27..000000000000
--- a/drivers/s390/s390mach.h
+++ /dev/null
@@ -1,122 +0,0 @@
1/*
2 * drivers/s390/s390mach.h
3 * S/390 data definitions for machine check processing
4 *
5 * S390 version
6 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Author(s): Ingo Adlung (adlung@de.ibm.com)
8 */
9
10#ifndef __s390mach_h
11#define __s390mach_h
12
13#include <asm/types.h>
14
15struct mci {
16 __u32 sd : 1; /* 00 system damage */
17 __u32 pd : 1; /* 01 instruction-processing damage */
18 __u32 sr : 1; /* 02 system recovery */
19 __u32 to_be_defined_1 : 1; /* 03 */
20 __u32 cd : 1; /* 04 timing-facility damage */
21 __u32 ed : 1; /* 05 external damage */
22 __u32 to_be_defined_2 : 1; /* 06 */
23 __u32 dg : 1; /* 07 degradation */
24 __u32 w : 1; /* 08 warning pending */
25 __u32 cp : 1; /* 09 channel-report pending */
26 __u32 sp : 1; /* 10 service-processor damage */
27 __u32 ck : 1; /* 11 channel-subsystem damage */
28 __u32 to_be_defined_3 : 2; /* 12-13 */
29 __u32 b : 1; /* 14 backed up */
30 __u32 to_be_defined_4 : 1; /* 15 */
31 __u32 se : 1; /* 16 storage error uncorrected */
32 __u32 sc : 1; /* 17 storage error corrected */
33 __u32 ke : 1; /* 18 storage-key error uncorrected */
34 __u32 ds : 1; /* 19 storage degradation */
35 __u32 wp : 1; /* 20 psw mwp validity */
36 __u32 ms : 1; /* 21 psw mask and key validity */
37 __u32 pm : 1; /* 22 psw program mask and cc validity */
38 __u32 ia : 1; /* 23 psw instruction address validity */
39 __u32 fa : 1; /* 24 failing storage address validity */
40 __u32 to_be_defined_5 : 1; /* 25 */
41 __u32 ec : 1; /* 26 external damage code validity */
42 __u32 fp : 1; /* 27 floating point register validity */
43 __u32 gr : 1; /* 28 general register validity */
44 __u32 cr : 1; /* 29 control register validity */
45 __u32 to_be_defined_6 : 1; /* 30 */
46 __u32 st : 1; /* 31 storage logical validity */
47 __u32 ie : 1; /* 32 indirect storage error */
48 __u32 ar : 1; /* 33 access register validity */
49 __u32 da : 1; /* 34 delayed access exception */
50 __u32 to_be_defined_7 : 7; /* 35-41 */
51 __u32 pr : 1; /* 42 tod programmable register validity */
52 __u32 fc : 1; /* 43 fp control register validity */
53 __u32 ap : 1; /* 44 ancillary report */
54 __u32 to_be_defined_8 : 1; /* 45 */
55 __u32 ct : 1; /* 46 cpu timer validity */
56 __u32 cc : 1; /* 47 clock comparator validity */
57 __u32 to_be_defined_9 : 16; /* 47-63 */
58};
59
60/*
61 * Channel Report Word
62 */
63struct crw {
64 __u32 res1 : 1; /* reserved zero */
65 __u32 slct : 1; /* solicited */
66 __u32 oflw : 1; /* overflow */
67 __u32 chn : 1; /* chained */
68 __u32 rsc : 4; /* reporting source code */
69 __u32 anc : 1; /* ancillary report */
70 __u32 res2 : 1; /* reserved zero */
71 __u32 erc : 6; /* error-recovery code */
72 __u32 rsid : 16; /* reporting-source ID */
73} __attribute__ ((packed));
74
75typedef void (*crw_handler_t)(struct crw *, struct crw *, int);
76
77extern int s390_register_crw_handler(int rsc, crw_handler_t handler);
78extern void s390_unregister_crw_handler(int rsc);
79
80#define NR_RSCS 16
81
82#define CRW_RSC_MONITOR 0x2 /* monitoring facility */
83#define CRW_RSC_SCH 0x3 /* subchannel */
84#define CRW_RSC_CPATH 0x4 /* channel path */
85#define CRW_RSC_CONFIG 0x9 /* configuration-alert facility */
86#define CRW_RSC_CSS 0xB /* channel subsystem */
87
88#define CRW_ERC_EVENT 0x00 /* event information pending */
89#define CRW_ERC_AVAIL 0x01 /* available */
90#define CRW_ERC_INIT 0x02 /* initialized */
91#define CRW_ERC_TERROR 0x03 /* temporary error */
92#define CRW_ERC_IPARM 0x04 /* installed parm initialized */
93#define CRW_ERC_TERM 0x05 /* terminal */
94#define CRW_ERC_PERRN 0x06 /* perm. error, fac. not init */
95#define CRW_ERC_PERRI 0x07 /* perm. error, facility init */
96#define CRW_ERC_PMOD 0x08 /* installed parameters modified */
97
98static inline int stcrw(struct crw *pcrw )
99{
100 int ccode;
101
102 __asm__ __volatile__(
103 "stcrw 0(%2)\n\t"
104 "ipm %0\n\t"
105 "srl %0,28\n\t"
106 : "=d" (ccode), "=m" (*pcrw)
107 : "a" (pcrw)
108 : "cc" );
109 return ccode;
110}
111
112#define ED_ETR_SYNC 12 /* External damage ETR sync check */
113#define ED_ETR_SWITCH 13 /* External damage ETR switch to local */
114
115#define ED_STP_SYNC 7 /* External damage STP sync check */
116#define ED_STP_ISLAND 6 /* External damage STP island check */
117
118struct pt_regs;
119
120void s390_handle_mcck(void);
121void s390_do_machine_check(struct pt_regs *regs);
122#endif /* __s390mach */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 06:19:43 -0500