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9#include <linux/export.h>
10#include <linux/init.h>
11#include <linux/cpu.h>
12#include <linux/seq_file.h>
13#include <linux/debugfs.h>
14#include <asm/diag.h>
15#include <asm/trace/diag.h>
16#include <asm/sections.h>
17#include "entry.h"
18
19struct diag_stat {
20 unsigned int counter[NR_DIAG_STAT];
21};
22
23static DEFINE_PER_CPU(struct diag_stat, diag_stat);
24
25struct diag_desc {
26 int code;
27 char *name;
28};
29
30static const struct diag_desc diag_map[NR_DIAG_STAT] = {
31 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
32 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
33 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
34 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
35 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
36 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
37 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
38 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
39 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
40 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
41 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
42 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
43 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
44 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
45 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
46 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
47 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
48 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
49 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
50 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
51 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
52};
53
54struct diag_ops __amode31_ref diag_amode31_ops = {
55 .diag210 = _diag210_amode31,
56 .diag26c = _diag26c_amode31,
57 .diag14 = _diag14_amode31,
58 .diag0c = _diag0c_amode31,
59 .diag308_reset = _diag308_reset_amode31
60};
61
62static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
63struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
64
65static int show_diag_stat(struct seq_file *m, void *v)
66{
67 struct diag_stat *stat;
68 unsigned long n = (unsigned long) v - 1;
69 int cpu, prec, tmp;
70
71 cpus_read_lock();
72 if (n == 0) {
73 seq_puts(m, " ");
74
75 for_each_online_cpu(cpu) {
76 prec = 10;
77 for (tmp = 10; cpu >= tmp; tmp *= 10)
78 prec--;
79 seq_printf(m, "%*s%d", prec, "CPU", cpu);
80 }
81 seq_putc(m, '\n');
82 } else if (n <= NR_DIAG_STAT) {
83 seq_printf(m, "diag %03x:", diag_map[n-1].code);
84 for_each_online_cpu(cpu) {
85 stat = &per_cpu(diag_stat, cpu);
86 seq_printf(m, " %10u", stat->counter[n-1]);
87 }
88 seq_printf(m, " %s\n", diag_map[n-1].name);
89 }
90 cpus_read_unlock();
91 return 0;
92}
93
94static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
95{
96 return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
97}
98
99static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
100{
101 ++*pos;
102 return show_diag_stat_start(m, pos);
103}
104
105static void show_diag_stat_stop(struct seq_file *m, void *v)
106{
107}
108
109static const struct seq_operations show_diag_stat_sops = {
110 .start = show_diag_stat_start,
111 .next = show_diag_stat_next,
112 .stop = show_diag_stat_stop,
113 .show = show_diag_stat,
114};
115
116DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
117
118static int __init show_diag_stat_init(void)
119{
120 debugfs_create_file("diag_stat", 0400, NULL, NULL,
121 &show_diag_stat_fops);
122 return 0;
123}
124
125device_initcall(show_diag_stat_init);
126
127void diag_stat_inc(enum diag_stat_enum nr)
128{
129 this_cpu_inc(diag_stat.counter[nr]);
130 trace_s390_diagnose(diag_map[nr].code);
131}
132EXPORT_SYMBOL(diag_stat_inc);
133
134void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
135{
136 this_cpu_inc(diag_stat.counter[nr]);
137 trace_s390_diagnose_norecursion(diag_map[nr].code);
138}
139EXPORT_SYMBOL(diag_stat_inc_norecursion);
140
141
142
143
144int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
145{
146 diag_stat_inc(DIAG_STAT_X014);
147 return diag_amode31_ops.diag14(rx, ry1, subcode);
148}
149EXPORT_SYMBOL(diag14);
150
151static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
152{
153 union register_pair rp = { .even = *subcode, .odd = size };
154
155 asm volatile(
156 " diag %[addr],%[rp],0x204\n"
157 "0: nopr %%r7\n"
158 EX_TABLE(0b,0b)
159 : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
160 *subcode = rp.even;
161 return rp.odd;
162}
163
164int diag204(unsigned long subcode, unsigned long size, void *addr)
165{
166 diag_stat_inc(DIAG_STAT_X204);
167 size = __diag204(&subcode, size, addr);
168 if (subcode)
169 return -1;
170 return size;
171}
172EXPORT_SYMBOL(diag204);
173
174
175
176
177int diag210(struct diag210 *addr)
178{
179 static DEFINE_SPINLOCK(diag210_lock);
180 unsigned long flags;
181 int ccode;
182
183 spin_lock_irqsave(&diag210_lock, flags);
184 *__diag210_tmp_amode31 = *addr;
185
186 diag_stat_inc(DIAG_STAT_X210);
187 ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
188
189 *addr = *__diag210_tmp_amode31;
190 spin_unlock_irqrestore(&diag210_lock, flags);
191
192 return ccode;
193}
194EXPORT_SYMBOL(diag210);
195
196int diag224(void *ptr)
197{
198 int rc = -EOPNOTSUPP;
199
200 diag_stat_inc(DIAG_STAT_X224);
201 asm volatile(
202 " diag %1,%2,0x224\n"
203 "0: lhi %0,0x0\n"
204 "1:\n"
205 EX_TABLE(0b,1b)
206 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
207 return rc;
208}
209EXPORT_SYMBOL(diag224);
210
211
212
213
214int diag26c(void *req, void *resp, enum diag26c_sc subcode)
215{
216 diag_stat_inc(DIAG_STAT_X26C);
217 return diag_amode31_ops.diag26c(req, resp, subcode);
218}
219EXPORT_SYMBOL(diag26c);
220
