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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 <asm/asm-extable.h>
15#include <asm/diag.h>
16#include <asm/trace/diag.h>
17#include <asm/sections.h>
18#include "entry.h"
19
20struct diag_stat {
21 unsigned int counter[NR_DIAG_STAT];
22};
23
24static DEFINE_PER_CPU(struct diag_stat, diag_stat);
25
26struct diag_desc {
27 int code;
28 char *name;
29};
30
31static const struct diag_desc diag_map[NR_DIAG_STAT] = {
32 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
33 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
34 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
35 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
36 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
37 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
38 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
39 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
40 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
41 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
42 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
43 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
44 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
45 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
46 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
47 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
48 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
49 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
50 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
51 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
52 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
53};
54
55struct diag_ops __amode31_ref diag_amode31_ops = {
56 .diag210 = _diag210_amode31,
57 .diag26c = _diag26c_amode31,
58 .diag14 = _diag14_amode31,
59 .diag0c = _diag0c_amode31,
60 .diag308_reset = _diag308_reset_amode31
61};
62
63static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
64struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
65
66static int show_diag_stat(struct seq_file *m, void *v)
67{
68 struct diag_stat *stat;
69 unsigned long n = (unsigned long) v - 1;
70 int cpu, prec, tmp;
71
72 cpus_read_lock();
73 if (n == 0) {
74 seq_puts(m, " ");
75
76 for_each_online_cpu(cpu) {
77 prec = 10;
78 for (tmp = 10; cpu >= tmp; tmp *= 10)
79 prec--;
80 seq_printf(m, "%*s%d", prec, "CPU", cpu);
81 }
82 seq_putc(m, '\n');
83 } else if (n <= NR_DIAG_STAT) {
84 seq_printf(m, "diag %03x:", diag_map[n-1].code);
85 for_each_online_cpu(cpu) {
86 stat = &per_cpu(diag_stat, cpu);
87 seq_printf(m, " %10u", stat->counter[n-1]);
88 }
89 seq_printf(m, " %s\n", diag_map[n-1].name);
90 }
91 cpus_read_unlock();
92 return 0;
93}
94
95static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
96{
97 return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
98}
99
100static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
101{
102 ++*pos;
103 return show_diag_stat_start(m, pos);
104}
105
106static void show_diag_stat_stop(struct seq_file *m, void *v)
107{
108}
109
110static const struct seq_operations show_diag_stat_sops = {
111 .start = show_diag_stat_start,
112 .next = show_diag_stat_next,
113 .stop = show_diag_stat_stop,
114 .show = show_diag_stat,
115};
116
117DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
118
119static int __init show_diag_stat_init(void)
120{
121 debugfs_create_file("diag_stat", 0400, NULL, NULL,
122 &show_diag_stat_fops);
123 return 0;
124}
125
126device_initcall(show_diag_stat_init);
127
128void diag_stat_inc(enum diag_stat_enum nr)
129{
130 this_cpu_inc(diag_stat.counter[nr]);
131 trace_s390_diagnose(diag_map[nr].code);
132}
133EXPORT_SYMBOL(diag_stat_inc);
134
135void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
136{
137 this_cpu_inc(diag_stat.counter[nr]);
138 trace_s390_diagnose_norecursion(diag_map[nr].code);
139}
140EXPORT_SYMBOL(diag_stat_inc_norecursion);
141
142/*
143 * Diagnose 14: Input spool file manipulation
144 */
145int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
146{
147 diag_stat_inc(DIAG_STAT_X014);
148 return diag_amode31_ops.diag14(rx, ry1, subcode);
149}
150EXPORT_SYMBOL(diag14);
151
152static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
153{
154 union register_pair rp = { .even = *subcode, .odd = size };
155
156 asm volatile(
157 " diag %[addr],%[rp],0x204\n"
158 "0: nopr %%r7\n"
159 EX_TABLE(0b,0b)
160 : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
161 *subcode = rp.even;
162 return rp.odd;
163}
164
165int diag204(unsigned long subcode, unsigned long size, void *addr)
166{
167 diag_stat_inc(DIAG_STAT_X204);
168 size = __diag204(&subcode, size, addr);
169 if (subcode)
170 return -1;
171 return size;
172}
173EXPORT_SYMBOL(diag204);
174
175/*
176 * Diagnose 210: Get information about a virtual device
177 */
178int diag210(struct diag210 *addr)
179{
180 static DEFINE_SPINLOCK(diag210_lock);
181 unsigned long flags;
182 int ccode;
183
184 spin_lock_irqsave(&diag210_lock, flags);
185 *__diag210_tmp_amode31 = *addr;
186
187 diag_stat_inc(DIAG_STAT_X210);
188 ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
189
190 *addr = *__diag210_tmp_amode31;
191 spin_unlock_irqrestore(&diag210_lock, flags);
192
193 return ccode;
194}
195EXPORT_SYMBOL(diag210);
196
197int diag224(void *ptr)
198{
199 int rc = -EOPNOTSUPP;
200
201 diag_stat_inc(DIAG_STAT_X224);
202 asm volatile(
203 " diag %1,%2,0x224\n"
204 "0: lhi %0,0x0\n"
205 "1:\n"
206 EX_TABLE(0b,1b)
207 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
208 return rc;
209}
210EXPORT_SYMBOL(diag224);
211
212/*
213 * Diagnose 26C: Access Certain System Information
214 */
215int diag26c(void *req, void *resp, enum diag26c_sc subcode)
216{
217 diag_stat_inc(DIAG_STAT_X26C);
218 return diag_amode31_ops.diag26c(req, resp, subcode);
219}
220EXPORT_SYMBOL(diag26c);
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 <asm/asm.h>
20#include "entry.h"
21
22struct diag_stat {
23 unsigned int counter[NR_DIAG_STAT];
24};
25
26static DEFINE_PER_CPU(struct diag_stat, diag_stat);
27
28struct diag_desc {
29 int code;
30 char *name;
31};
32
33static const struct diag_desc diag_map[NR_DIAG_STAT] = {
34 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
35 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
36 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
37 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
38 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
39 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
40 [DIAG_STAT_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" },
41 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
42 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
43 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
44 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
45 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
46 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
47 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
48 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
49 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
50 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
51 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
52 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
53 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
54 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
55 [DIAG_STAT_X320] = { .code = 0x320, .name = "Certificate Store" },
56 [DIAG_STAT_X49C] = { .code = 0x49c, .name = "Warning-Track Interruption" },
57 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
58};
59
60struct diag_ops __amode31_ref diag_amode31_ops = {
61 .diag210 = _diag210_amode31,
62 .diag26c = _diag26c_amode31,
63 .diag14 = _diag14_amode31,
64 .diag0c = _diag0c_amode31,
65 .diag8c = _diag8c_amode31,
66 .diag308_reset = _diag308_reset_amode31
67};
68
69static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
70struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
71
72static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data");
73static struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31;
74
75static int show_diag_stat(struct seq_file *m, void *v)
76{
77 struct diag_stat *stat;
78 unsigned long n = (unsigned long) v - 1;
79 int cpu, prec, tmp;
80
81 cpus_read_lock();
82 if (n == 0) {
83 seq_puts(m, " ");
84
85 for_each_online_cpu(cpu) {
86 prec = 10;
87 for (tmp = 10; cpu >= tmp; tmp *= 10)
88 prec--;
89 seq_printf(m, "%*s%d", prec, "CPU", cpu);
90 }
91 seq_putc(m, '\n');
92 } else if (n <= NR_DIAG_STAT) {
93 seq_printf(m, "diag %03x:", diag_map[n-1].code);
94 for_each_online_cpu(cpu) {
95 stat = &per_cpu(diag_stat, cpu);
96 seq_printf(m, " %10u", stat->counter[n-1]);
97 }
98 seq_printf(m, " %s\n", diag_map[n-1].name);
99 }
100 cpus_read_unlock();
101 return 0;
102}
103
104static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
105{
106 return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
107}
108
109static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
110{
111 ++*pos;
112 return show_diag_stat_start(m, pos);
113}
114
115static void show_diag_stat_stop(struct seq_file *m, void *v)
116{
117}
118
119static const struct seq_operations show_diag_stat_sops = {
120 .start = show_diag_stat_start,
121 .next = show_diag_stat_next,
122 .stop = show_diag_stat_stop,
123 .show = show_diag_stat,
124};
125
126DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
127
128static int __init show_diag_stat_init(void)
129{
130 debugfs_create_file("diag_stat", 0400, NULL, NULL,
131 &show_diag_stat_fops);
132 return 0;
133}
134
135device_initcall(show_diag_stat_init);
136
137void diag_stat_inc(enum diag_stat_enum nr)
138{
139 this_cpu_inc(diag_stat.counter[nr]);
140 trace_s390_diagnose(diag_map[nr].code);
141}
142EXPORT_SYMBOL(diag_stat_inc);
143
144void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
145{
146 this_cpu_inc(diag_stat.counter[nr]);
147 trace_s390_diagnose_norecursion(diag_map[nr].code);
148}
149EXPORT_SYMBOL(diag_stat_inc_norecursion);
150
151/*
152 * Diagnose 0c: Pseudo Timer
153 */
154void diag0c(struct hypfs_diag0c_entry *data)
155{
156 diag_stat_inc(DIAG_STAT_X00C);
157 diag_amode31_ops.diag0c(virt_to_phys(data));
158}
159
160/*
161 * Diagnose 14: Input spool file manipulation
162 *
163 * The subcode parameter determines the type of the first parameter rx.
164 * Currently used are the following 3 subcommands:
165 * 0x0: Read the Next Spool File Buffer (Data Record)
166 * 0x28: Position a Spool File to the Designated Record
167 * 0xfff: Retrieve Next File Descriptor
168 *
169 * For subcommands 0x0 and 0xfff, the value of the first parameter is
170 * a virtual address of a memory buffer and needs virtual to physical
171 * address translation. For other subcommands the rx parameter is not
172 * a virtual address.
173 */
174int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
175{
176 diag_stat_inc(DIAG_STAT_X014);
177 switch (subcode) {
178 case 0x0:
179 case 0xfff:
180 rx = virt_to_phys((void *)rx);
181 break;
182 default:
183 /* Do nothing */
184 break;
185 }
186 return diag_amode31_ops.diag14(rx, ry1, subcode);
187}
188EXPORT_SYMBOL(diag14);
189
190#define DIAG204_BUSY_RC 8
191
192static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
193{
194 union register_pair rp = { .even = *subcode, .odd = size };
195
196 asm volatile(
197 " diag %[addr],%[rp],0x204\n"
198 "0: nopr %%r7\n"
199 EX_TABLE(0b,0b)
200 : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
201 *subcode = rp.even;
202 return rp.odd;
203}
204
205/**
206 * diag204() - Issue diagnose 204 call.
207 * @subcode: Subcode of diagnose 204 to be executed.
208 * @size: Size of area in pages which @area points to, if given.
209 * @addr: Vmalloc'ed memory area where the result is written to.
210 *
211 * Execute diagnose 204 with the given subcode and write the result to the
212 * memory area specified with @addr. For subcodes which do not write a
213 * result to memory both @size and @addr must be zero. If @addr is
214 * specified it must be page aligned and must have been allocated with
215 * vmalloc(). Conversion to real / physical addresses will be handled by
216 * this function if required.
217 */
218int diag204(unsigned long subcode, unsigned long size, void *addr)
219{
220 if (addr) {
221 if (WARN_ON_ONCE(!is_vmalloc_addr(addr)))
222 return -EINVAL;
223 if (WARN_ON_ONCE(!IS_ALIGNED((unsigned long)addr, PAGE_SIZE)))
224 return -EINVAL;
225 }
226 if ((subcode & DIAG204_SUBCODE_MASK) == DIAG204_SUBC_STIB4)
227 addr = (void *)pfn_to_phys(vmalloc_to_pfn(addr));
228 diag_stat_inc(DIAG_STAT_X204);
229 size = __diag204(&subcode, size, addr);
230 if (subcode == DIAG204_BUSY_RC)
231 return -EBUSY;
232 else if (subcode)
233 return -EOPNOTSUPP;
234 return size;
235}
236EXPORT_SYMBOL(diag204);
237
238/*
239 * Diagnose 210: Get information about a virtual device
240 */
241int diag210(struct diag210 *addr)
242{
243 static DEFINE_SPINLOCK(diag210_lock);
244 unsigned long flags;
245 int ccode;
246
247 spin_lock_irqsave(&diag210_lock, flags);
248 *__diag210_tmp_amode31 = *addr;
249
250 diag_stat_inc(DIAG_STAT_X210);
251 ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
252
253 *addr = *__diag210_tmp_amode31;
254 spin_unlock_irqrestore(&diag210_lock, flags);
255
256 return ccode;
257}
258EXPORT_SYMBOL(diag210);
259
260/*
261 * Diagnose 8C: Access 3270 Display Device Information
262 */
263int diag8c(struct diag8c *addr, struct ccw_dev_id *devno)
264{
265 static DEFINE_SPINLOCK(diag8c_lock);
266 unsigned long flags;
267 int ccode;
268
269 spin_lock_irqsave(&diag8c_lock, flags);
270
271 diag_stat_inc(DIAG_STAT_X08C);
272 ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr));
273
274 *addr = *__diag8c_tmp_amode31;
275 spin_unlock_irqrestore(&diag8c_lock, flags);
276
277 return ccode;
278}
279EXPORT_SYMBOL(diag8c);
280
281int diag224(void *ptr)
282{
283 unsigned long addr = __pa(ptr);
284 int rc = -EOPNOTSUPP;
285
286 diag_stat_inc(DIAG_STAT_X224);
287 asm volatile("\n"
288 " diag %[type],%[addr],0x224\n"
289 "0: lhi %[rc],0\n"
290 "1:\n"
291 EX_TABLE(0b,1b)
292 : [rc] "+d" (rc)
293 , "=m" (*(struct { char buf[PAGE_SIZE]; } *)ptr)
294 : [type] "d" (0), [addr] "d" (addr));
295 return rc;
296}
297EXPORT_SYMBOL(diag224);
298
299/*
300 * Diagnose 26C: Access Certain System Information
301 */
302int diag26c(void *req, void *resp, enum diag26c_sc subcode)
303{
304 diag_stat_inc(DIAG_STAT_X26C);
305 return diag_amode31_ops.diag26c(virt_to_phys(req), virt_to_phys(resp), subcode);
306}
307EXPORT_SYMBOL(diag26c);
308
309int diag49c(unsigned long subcode)
310{
311 int cc;
312
313 diag_stat_inc(DIAG_STAT_X49C);
314 asm volatile(
315 " diag %[subcode],0,0x49c\n"
316 CC_IPM(cc)
317 : CC_OUT(cc, cc)
318 : [subcode] "d" (subcode)
319 : CC_CLOBBER);
320 return CC_TRANSFORM(cc);
321}
322EXPORT_SYMBOL(diag49c);