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1/*
2 * Implementation of s390 diagnose codes
3 *
4 * Copyright IBM Corp. 2007
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 */
7
8#include <linux/module.h>
9#include <linux/cpu.h>
10#include <linux/seq_file.h>
11#include <linux/debugfs.h>
12#include <asm/diag.h>
13#include <asm/trace/diag.h>
14
15struct diag_stat {
16 unsigned int counter[NR_DIAG_STAT];
17};
18
19static DEFINE_PER_CPU(struct diag_stat, diag_stat);
20
21struct diag_desc {
22 int code;
23 char *name;
24};
25
26static const struct diag_desc diag_map[NR_DIAG_STAT] = {
27 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
28 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
29 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
30 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
31 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
32 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
33 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
34 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
35 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
36 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
37 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
38 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
39 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
40 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
41 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
42 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
43 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
44 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
45 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
46};
47
48static int show_diag_stat(struct seq_file *m, void *v)
49{
50 struct diag_stat *stat;
51 unsigned long n = (unsigned long) v - 1;
52 int cpu, prec, tmp;
53
54 get_online_cpus();
55 if (n == 0) {
56 seq_puts(m, " ");
57
58 for_each_online_cpu(cpu) {
59 prec = 10;
60 for (tmp = 10; cpu >= tmp; tmp *= 10)
61 prec--;
62 seq_printf(m, "%*s%d", prec, "CPU", cpu);
63 }
64 seq_putc(m, '\n');
65 } else if (n <= NR_DIAG_STAT) {
66 seq_printf(m, "diag %03x:", diag_map[n-1].code);
67 for_each_online_cpu(cpu) {
68 stat = &per_cpu(diag_stat, cpu);
69 seq_printf(m, " %10u", stat->counter[n-1]);
70 }
71 seq_printf(m, " %s\n", diag_map[n-1].name);
72 }
73 put_online_cpus();
74 return 0;
75}
76
77static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
78{
79 return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
80}
81
82static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
83{
84 ++*pos;
85 return show_diag_stat_start(m, pos);
86}
87
88static void show_diag_stat_stop(struct seq_file *m, void *v)
89{
90}
91
92static const struct seq_operations show_diag_stat_sops = {
93 .start = show_diag_stat_start,
94 .next = show_diag_stat_next,
95 .stop = show_diag_stat_stop,
96 .show = show_diag_stat,
97};
98
99static int show_diag_stat_open(struct inode *inode, struct file *file)
100{
101 return seq_open(file, &show_diag_stat_sops);
102}
103
104static const struct file_operations show_diag_stat_fops = {
105 .open = show_diag_stat_open,
106 .read = seq_read,
107 .llseek = seq_lseek,
108 .release = seq_release,
109};
110
111
112static int __init show_diag_stat_init(void)
113{
114 debugfs_create_file("diag_stat", 0400, NULL, NULL,
115 &show_diag_stat_fops);
116 return 0;
117}
118
119device_initcall(show_diag_stat_init);
120
121void diag_stat_inc(enum diag_stat_enum nr)
122{
123 this_cpu_inc(diag_stat.counter[nr]);
124 trace_s390_diagnose(diag_map[nr].code);
125}
126EXPORT_SYMBOL(diag_stat_inc);
127
128void diag_stat_inc_norecursion(enum diag_stat_enum nr)
129{
130 this_cpu_inc(diag_stat.counter[nr]);
131 trace_s390_diagnose_norecursion(diag_map[nr].code);
132}
133EXPORT_SYMBOL(diag_stat_inc_norecursion);
134
135/*
136 * Diagnose 14: Input spool file manipulation
137 */
138static inline int __diag14(unsigned long rx, unsigned long ry1,
139 unsigned long subcode)
140{
141 register unsigned long _ry1 asm("2") = ry1;
142 register unsigned long _ry2 asm("3") = subcode;
143 int rc = 0;
144
145 asm volatile(
146 " sam31\n"
147 " diag %2,2,0x14\n"
148 " sam64\n"
149 " ipm %0\n"
150 " srl %0,28\n"
151 : "=d" (rc), "+d" (_ry2)
152 : "d" (rx), "d" (_ry1)
153 : "cc");
154
155 return rc;
156}
157
158int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
159{
160 diag_stat_inc(DIAG_STAT_X014);
161 return __diag14(rx, ry1, subcode);
162}
163EXPORT_SYMBOL(diag14);
164
165static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
166{
167 register unsigned long _subcode asm("0") = *subcode;
168 register unsigned long _size asm("1") = size;
169
170 asm volatile(
171 " diag %2,%0,0x204\n"
172 "0: nopr %%r7\n"
173 EX_TABLE(0b,0b)
174 : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
175 *subcode = _subcode;
176 return _size;
177}
178
179int diag204(unsigned long subcode, unsigned long size, void *addr)
180{
181 diag_stat_inc(DIAG_STAT_X204);
182 size = __diag204(&subcode, size, addr);
183 if (subcode)
184 return -1;
185 return size;
186}
187EXPORT_SYMBOL(diag204);
188
189/*
190 * Diagnose 210: Get information about a virtual device
191 */
192int diag210(struct diag210 *addr)
193{
194 /*
195 * diag 210 needs its data below the 2GB border, so we
196 * use a static data area to be sure
197 */
198 static struct diag210 diag210_tmp;
199 static DEFINE_SPINLOCK(diag210_lock);
200 unsigned long flags;
201 int ccode;
202
203 spin_lock_irqsave(&diag210_lock, flags);
204 diag210_tmp = *addr;
205
206 diag_stat_inc(DIAG_STAT_X210);
207 asm volatile(
208 " lhi %0,-1\n"
209 " sam31\n"
210 " diag %1,0,0x210\n"
211 "0: ipm %0\n"
212 " srl %0,28\n"
213 "1: sam64\n"
214 EX_TABLE(0b, 1b)
215 : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
216
217 *addr = diag210_tmp;
218 spin_unlock_irqrestore(&diag210_lock, flags);
219
220 return ccode;
221}
222EXPORT_SYMBOL(diag210);
223
224int diag224(void *ptr)
225{
226 int rc = -EOPNOTSUPP;
227
228 diag_stat_inc(DIAG_STAT_X224);
229 asm volatile(
230 " diag %1,%2,0x224\n"
231 "0: lhi %0,0x0\n"
232 "1:\n"
233 EX_TABLE(0b,1b)
234 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
235 return rc;
236}
237EXPORT_SYMBOL(diag224);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Implementation of s390 diagnose codes
4 *
5 * Copyright IBM Corp. 2007
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 */
8
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 <linux/vmalloc.h>
15#include <asm/asm-extable.h>
16#include <asm/diag.h>
17#include <asm/trace/diag.h>
18#include <asm/sections.h>
19#include "entry.h"
20
21struct diag_stat {
22 unsigned int counter[NR_DIAG_STAT];
23};
24
25static DEFINE_PER_CPU(struct diag_stat, diag_stat);
26
27struct diag_desc {
28 int code;
29 char *name;
30};
31
32static const struct diag_desc diag_map[NR_DIAG_STAT] = {
33 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
34 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
35 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
36 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
37 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
38 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
39 [DIAG_STAT_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" },
40 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
41 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
42 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
43 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
44 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
45 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
46 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
47 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
48 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
49 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
50 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
51 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
52 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
53 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
54 [DIAG_STAT_X320] = { .code = 0x320, .name = "Certificate Store" },
55 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
56};
57
58struct diag_ops __amode31_ref diag_amode31_ops = {
59 .diag210 = _diag210_amode31,
60 .diag26c = _diag26c_amode31,
61 .diag14 = _diag14_amode31,
62 .diag0c = _diag0c_amode31,
63 .diag8c = _diag8c_amode31,
64 .diag308_reset = _diag308_reset_amode31
65};
66
67static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
68struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
69
70static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data");
71static struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31;
72
73static int show_diag_stat(struct seq_file *m, void *v)
74{
75 struct diag_stat *stat;
76 unsigned long n = (unsigned long) v - 1;
77 int cpu, prec, tmp;
78
79 cpus_read_lock();
80 if (n == 0) {
81 seq_puts(m, " ");
82
83 for_each_online_cpu(cpu) {
84 prec = 10;
85 for (tmp = 10; cpu >= tmp; tmp *= 10)
86 prec--;
87 seq_printf(m, "%*s%d", prec, "CPU", cpu);
88 }
89 seq_putc(m, '\n');
90 } else if (n <= NR_DIAG_STAT) {
91 seq_printf(m, "diag %03x:", diag_map[n-1].code);
92 for_each_online_cpu(cpu) {
93 stat = &per_cpu(diag_stat, cpu);
94 seq_printf(m, " %10u", stat->counter[n-1]);
95 }
96 seq_printf(m, " %s\n", diag_map[n-1].name);
97 }
98 cpus_read_unlock();
99 return 0;
100}
101
102static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
103{
104 return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
105}
106
107static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
108{
109 ++*pos;
110 return show_diag_stat_start(m, pos);
111}
112
113static void show_diag_stat_stop(struct seq_file *m, void *v)
114{
115}
116
117static const struct seq_operations show_diag_stat_sops = {
118 .start = show_diag_stat_start,
119 .next = show_diag_stat_next,
120 .stop = show_diag_stat_stop,
121 .show = show_diag_stat,
122};
123
124DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
125
126static int __init show_diag_stat_init(void)
127{
128 debugfs_create_file("diag_stat", 0400, NULL, NULL,
129 &show_diag_stat_fops);
130 return 0;
131}
132
133device_initcall(show_diag_stat_init);
134
135void diag_stat_inc(enum diag_stat_enum nr)
136{
137 this_cpu_inc(diag_stat.counter[nr]);
138 trace_s390_diagnose(diag_map[nr].code);
139}
140EXPORT_SYMBOL(diag_stat_inc);
141
142void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
143{
144 this_cpu_inc(diag_stat.counter[nr]);
145 trace_s390_diagnose_norecursion(diag_map[nr].code);
146}
147EXPORT_SYMBOL(diag_stat_inc_norecursion);
148
149/*
150 * Diagnose 0c: Pseudo Timer
151 */
152void diag0c(struct hypfs_diag0c_entry *data)
153{
154 diag_stat_inc(DIAG_STAT_X00C);
155 diag_amode31_ops.diag0c(virt_to_phys(data));
156}
157
158/*
159 * Diagnose 14: Input spool file manipulation
160 *
161 * The subcode parameter determines the type of the first parameter rx.
162 * Currently used are the following 3 subcommands:
163 * 0x0: Read the Next Spool File Buffer (Data Record)
164 * 0x28: Position a Spool File to the Designated Record
165 * 0xfff: Retrieve Next File Descriptor
166 *
167 * For subcommands 0x0 and 0xfff, the value of the first parameter is
168 * a virtual address of a memory buffer and needs virtual to physical
169 * address translation. For other subcommands the rx parameter is not
170 * a virtual address.
171 */
172int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
173{
174 diag_stat_inc(DIAG_STAT_X014);
175 switch (subcode) {
176 case 0x0:
177 case 0xfff:
178 rx = virt_to_phys((void *)rx);
179 break;
180 default:
181 /* Do nothing */
182 break;
183 }
184 return diag_amode31_ops.diag14(rx, ry1, subcode);
185}
186EXPORT_SYMBOL(diag14);
187
188static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
189{
190 union register_pair rp = { .even = *subcode, .odd = size };
191
192 asm volatile(
193 " diag %[addr],%[rp],0x204\n"
194 "0: nopr %%r7\n"
195 EX_TABLE(0b,0b)
196 : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
197 *subcode = rp.even;
198 return rp.odd;
199}
200
201/**
202 * diag204() - Issue diagnose 204 call.
203 * @subcode: Subcode of diagnose 204 to be executed.
204 * @size: Size of area in pages which @area points to, if given.
205 * @addr: Vmalloc'ed memory area where the result is written to.
206 *
207 * Execute diagnose 204 with the given subcode and write the result to the
208 * memory area specified with @addr. For subcodes which do not write a
209 * result to memory both @size and @addr must be zero. If @addr is
210 * specified it must be page aligned and must have been allocated with
211 * vmalloc(). Conversion to real / physical addresses will be handled by
212 * this function if required.
213 */
214int diag204(unsigned long subcode, unsigned long size, void *addr)
215{
216 if (addr) {
217 if (WARN_ON_ONCE(!is_vmalloc_addr(addr)))
218 return -1;
219 if (WARN_ON_ONCE(!IS_ALIGNED((unsigned long)addr, PAGE_SIZE)))
220 return -1;
221 }
222 if ((subcode & DIAG204_SUBCODE_MASK) == DIAG204_SUBC_STIB4)
223 addr = (void *)pfn_to_phys(vmalloc_to_pfn(addr));
224 diag_stat_inc(DIAG_STAT_X204);
225 size = __diag204(&subcode, size, addr);
226 if (subcode)
227 return -1;
228 return size;
229}
230EXPORT_SYMBOL(diag204);
231
232/*
233 * Diagnose 210: Get information about a virtual device
234 */
235int diag210(struct diag210 *addr)
236{
237 static DEFINE_SPINLOCK(diag210_lock);
238 unsigned long flags;
239 int ccode;
240
241 spin_lock_irqsave(&diag210_lock, flags);
242 *__diag210_tmp_amode31 = *addr;
243
244 diag_stat_inc(DIAG_STAT_X210);
245 ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
246
247 *addr = *__diag210_tmp_amode31;
248 spin_unlock_irqrestore(&diag210_lock, flags);
249
250 return ccode;
251}
252EXPORT_SYMBOL(diag210);
253
254/*
255 * Diagnose 8C: Access 3270 Display Device Information
256 */
257int diag8c(struct diag8c *addr, struct ccw_dev_id *devno)
258{
259 static DEFINE_SPINLOCK(diag8c_lock);
260 unsigned long flags;
261 int ccode;
262
263 spin_lock_irqsave(&diag8c_lock, flags);
264
265 diag_stat_inc(DIAG_STAT_X08C);
266 ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr));
267
268 *addr = *__diag8c_tmp_amode31;
269 spin_unlock_irqrestore(&diag8c_lock, flags);
270
271 return ccode;
272}
273EXPORT_SYMBOL(diag8c);
274
275int diag224(void *ptr)
276{
277 unsigned long addr = __pa(ptr);
278 int rc = -EOPNOTSUPP;
279
280 diag_stat_inc(DIAG_STAT_X224);
281 asm volatile(
282 " diag %1,%2,0x224\n"
283 "0: lhi %0,0x0\n"
284 "1:\n"
285 EX_TABLE(0b,1b)
286 : "+d" (rc) :"d" (0), "d" (addr) : "memory");
287 return rc;
288}
289EXPORT_SYMBOL(diag224);
290
291/*
292 * Diagnose 26C: Access Certain System Information
293 */
294int diag26c(void *req, void *resp, enum diag26c_sc subcode)
295{
296 diag_stat_inc(DIAG_STAT_X26C);
297 return diag_amode31_ops.diag26c(virt_to_phys(req), virt_to_phys(resp), subcode);
298}
299EXPORT_SYMBOL(diag26c);