1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
// SPDX-License-Identifier: GPL-2.0
/*
* Implementation of s390 diagnose codes
*
* Copyright IBM Corp. 2007
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
#include <linux/export.h>
#include <linux/init.h>
#include <linux/cpu.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <asm/diag.h>
#include <asm/trace/diag.h>
struct diag_stat {
unsigned int counter[NR_DIAG_STAT];
};
static DEFINE_PER_CPU(struct diag_stat, diag_stat);
struct diag_desc {
int code;
char *name;
};
static const struct diag_desc diag_map[NR_DIAG_STAT] = {
[DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
[DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
[DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
[DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
[DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
[DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
[DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
[DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
[DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
[DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
};
static int show_diag_stat(struct seq_file *m, void *v)
{
struct diag_stat *stat;
unsigned long n = (unsigned long) v - 1;
int cpu, prec, tmp;
get_online_cpus();
if (n == 0) {
seq_puts(m, " ");
for_each_online_cpu(cpu) {
prec = 10;
for (tmp = 10; cpu >= tmp; tmp *= 10)
prec--;
seq_printf(m, "%*s%d", prec, "CPU", cpu);
}
seq_putc(m, '\n');
} else if (n <= NR_DIAG_STAT) {
seq_printf(m, "diag %03x:", diag_map[n-1].code);
for_each_online_cpu(cpu) {
stat = &per_cpu(diag_stat, cpu);
seq_printf(m, " %10u", stat->counter[n-1]);
}
seq_printf(m, " %s\n", diag_map[n-1].name);
}
put_online_cpus();
return 0;
}
static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
{
return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
}
static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return show_diag_stat_start(m, pos);
}
static void show_diag_stat_stop(struct seq_file *m, void *v)
{
}
static const struct seq_operations show_diag_stat_sops = {
.start = show_diag_stat_start,
.next = show_diag_stat_next,
.stop = show_diag_stat_stop,
.show = show_diag_stat,
};
static int show_diag_stat_open(struct inode *inode, struct file *file)
{
return seq_open(file, &show_diag_stat_sops);
}
static const struct file_operations show_diag_stat_fops = {
.open = show_diag_stat_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int __init show_diag_stat_init(void)
{
debugfs_create_file("diag_stat", 0400, NULL, NULL,
&show_diag_stat_fops);
return 0;
}
device_initcall(show_diag_stat_init);
void diag_stat_inc(enum diag_stat_enum nr)
{
this_cpu_inc(diag_stat.counter[nr]);
trace_s390_diagnose(diag_map[nr].code);
}
EXPORT_SYMBOL(diag_stat_inc);
void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
{
this_cpu_inc(diag_stat.counter[nr]);
trace_s390_diagnose_norecursion(diag_map[nr].code);
}
EXPORT_SYMBOL(diag_stat_inc_norecursion);
/*
* Diagnose 14: Input spool file manipulation
*/
static inline int __diag14(unsigned long rx, unsigned long ry1,
unsigned long subcode)
{
register unsigned long _ry1 asm("2") = ry1;
register unsigned long _ry2 asm("3") = subcode;
int rc = 0;
asm volatile(
" sam31\n"
" diag %2,2,0x14\n"
" sam64\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (rc), "+d" (_ry2)
: "d" (rx), "d" (_ry1)
: "cc");
return rc;
}
int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
{
diag_stat_inc(DIAG_STAT_X014);
return __diag14(rx, ry1, subcode);
}
EXPORT_SYMBOL(diag14);
static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
{
register unsigned long _subcode asm("0") = *subcode;
register unsigned long _size asm("1") = size;
asm volatile(
" diag %2,%0,0x204\n"
"0: nopr %%r7\n"
EX_TABLE(0b,0b)
: "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
*subcode = _subcode;
return _size;
}
int diag204(unsigned long subcode, unsigned long size, void *addr)
{
diag_stat_inc(DIAG_STAT_X204);
size = __diag204(&subcode, size, addr);
if (subcode)
return -1;
return size;
}
EXPORT_SYMBOL(diag204);
/*
* Diagnose 210: Get information about a virtual device
*/
int diag210(struct diag210 *addr)
{
/*
* diag 210 needs its data below the 2GB border, so we
* use a static data area to be sure
*/
static struct diag210 diag210_tmp;
static DEFINE_SPINLOCK(diag210_lock);
unsigned long flags;
int ccode;
spin_lock_irqsave(&diag210_lock, flags);
diag210_tmp = *addr;
diag_stat_inc(DIAG_STAT_X210);
asm volatile(
" lhi %0,-1\n"
" sam31\n"
" diag %1,0,0x210\n"
"0: ipm %0\n"
" srl %0,28\n"
"1: sam64\n"
EX_TABLE(0b, 1b)
: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
*addr = diag210_tmp;
spin_unlock_irqrestore(&diag210_lock, flags);
return ccode;
}
EXPORT_SYMBOL(diag210);
int diag224(void *ptr)
{
int rc = -EOPNOTSUPP;
diag_stat_inc(DIAG_STAT_X224);
asm volatile(
" diag %1,%2,0x224\n"
"0: lhi %0,0x0\n"
"1:\n"
EX_TABLE(0b,1b)
: "+d" (rc) :"d" (0), "d" (ptr) : "memory");
return rc;
}
EXPORT_SYMBOL(diag224);
/*
* Diagnose 26C: Access Certain System Information
*/
static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode)
{
register unsigned long _req asm("2") = (addr_t) req;
register unsigned long _resp asm("3") = (addr_t) resp;
register unsigned long _subcode asm("4") = subcode;
register unsigned long _rc asm("5") = -EOPNOTSUPP;
asm volatile(
" sam31\n"
" diag %[rx],%[ry],0x26c\n"
"0: sam64\n"
EX_TABLE(0b,0b)
: "+d" (_rc)
: [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode)
: "cc", "memory");
return _rc;
}
int diag26c(void *req, void *resp, enum diag26c_sc subcode)
{
diag_stat_inc(DIAG_STAT_X26C);
return __diag26c(req, resp, subcode);
}
EXPORT_SYMBOL(diag26c);
|
