1 // SPDX-License-Identifier: GPL-2.0
3 * Implementation of s390 diagnose codes
5 * Copyright IBM Corp. 2007
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>
16 #include <asm/trace/diag.h>
17 #include <asm/sections.h>
21 unsigned int counter[NR_DIAG_STAT];
24 static DEFINE_PER_CPU(struct diag_stat, diag_stat);
31 static 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_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" },
39 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
40 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
41 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
42 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
43 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
44 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
45 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
46 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
47 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
48 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
49 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
50 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
51 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
52 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
53 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
56 struct diag_ops __amode31_ref diag_amode31_ops = {
57 .diag210 = _diag210_amode31,
58 .diag26c = _diag26c_amode31,
59 .diag14 = _diag14_amode31,
60 .diag0c = _diag0c_amode31,
61 .diag8c = _diag8c_amode31,
62 .diag308_reset = _diag308_reset_amode31
65 static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
66 struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
68 static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data");
69 static struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31;
71 static int show_diag_stat(struct seq_file *m, void *v)
73 struct diag_stat *stat;
74 unsigned long n = (unsigned long) v - 1;
81 for_each_online_cpu(cpu) {
83 for (tmp = 10; cpu >= tmp; tmp *= 10)
85 seq_printf(m, "%*s%d", prec, "CPU", cpu);
88 } else if (n <= NR_DIAG_STAT) {
89 seq_printf(m, "diag %03x:", diag_map[n-1].code);
90 for_each_online_cpu(cpu) {
91 stat = &per_cpu(diag_stat, cpu);
92 seq_printf(m, " %10u", stat->counter[n-1]);
94 seq_printf(m, " %s\n", diag_map[n-1].name);
100 static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
102 return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
105 static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
108 return show_diag_stat_start(m, pos);
111 static void show_diag_stat_stop(struct seq_file *m, void *v)
115 static const struct seq_operations show_diag_stat_sops = {
116 .start = show_diag_stat_start,
117 .next = show_diag_stat_next,
118 .stop = show_diag_stat_stop,
119 .show = show_diag_stat,
122 DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
124 static int __init show_diag_stat_init(void)
126 debugfs_create_file("diag_stat", 0400, NULL, NULL,
127 &show_diag_stat_fops);
131 device_initcall(show_diag_stat_init);
133 void diag_stat_inc(enum diag_stat_enum nr)
135 this_cpu_inc(diag_stat.counter[nr]);
136 trace_s390_diagnose(diag_map[nr].code);
138 EXPORT_SYMBOL(diag_stat_inc);
140 void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
142 this_cpu_inc(diag_stat.counter[nr]);
143 trace_s390_diagnose_norecursion(diag_map[nr].code);
145 EXPORT_SYMBOL(diag_stat_inc_norecursion);
148 * Diagnose 14: Input spool file manipulation
150 int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
152 diag_stat_inc(DIAG_STAT_X014);
153 return diag_amode31_ops.diag14(rx, ry1, subcode);
155 EXPORT_SYMBOL(diag14);
157 static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
159 union register_pair rp = { .even = *subcode, .odd = size };
162 " diag %[addr],%[rp],0x204\n"
165 : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
170 int diag204(unsigned long subcode, unsigned long size, void *addr)
172 diag_stat_inc(DIAG_STAT_X204);
173 size = __diag204(&subcode, size, addr);
178 EXPORT_SYMBOL(diag204);
181 * Diagnose 210: Get information about a virtual device
183 int diag210(struct diag210 *addr)
185 static DEFINE_SPINLOCK(diag210_lock);
189 spin_lock_irqsave(&diag210_lock, flags);
190 *__diag210_tmp_amode31 = *addr;
192 diag_stat_inc(DIAG_STAT_X210);
193 ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
195 *addr = *__diag210_tmp_amode31;
196 spin_unlock_irqrestore(&diag210_lock, flags);
200 EXPORT_SYMBOL(diag210);
203 * Diagnose 210: Get information about a virtual device
205 int diag8c(struct diag8c *addr, struct ccw_dev_id *devno)
207 static DEFINE_SPINLOCK(diag8c_lock);
211 spin_lock_irqsave(&diag8c_lock, flags);
213 diag_stat_inc(DIAG_STAT_X08C);
214 ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr));
216 *addr = *__diag8c_tmp_amode31;
217 spin_unlock_irqrestore(&diag8c_lock, flags);
221 EXPORT_SYMBOL(diag8c);
223 int diag224(void *ptr)
225 int rc = -EOPNOTSUPP;
227 diag_stat_inc(DIAG_STAT_X224);
229 " diag %1,%2,0x224\n"
233 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
236 EXPORT_SYMBOL(diag224);
239 * Diagnose 26C: Access Certain System Information
241 int diag26c(void *req, void *resp, enum diag26c_sc subcode)
243 diag_stat_inc(DIAG_STAT_X26C);
244 return diag_amode31_ops.diag26c(req, resp, subcode);
246 EXPORT_SYMBOL(diag26c);