2 * Implementation of s390 diagnose codes
4 * Copyright IBM Corp. 2007
8 #include <linux/export.h>
9 #include <linux/init.h>
10 #include <linux/cpu.h>
11 #include <linux/seq_file.h>
12 #include <linux/debugfs.h>
14 #include <asm/trace/diag.h>
17 unsigned int counter[NR_DIAG_STAT];
20 static DEFINE_PER_CPU(struct diag_stat, diag_stat);
27 static const struct diag_desc diag_map[NR_DIAG_STAT] = {
28 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
29 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
30 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
31 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
32 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
33 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
34 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
35 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
36 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
37 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
38 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
39 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
40 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
41 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
42 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
43 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
44 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
45 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
46 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
47 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
50 static int show_diag_stat(struct seq_file *m, void *v)
52 struct diag_stat *stat;
53 unsigned long n = (unsigned long) v - 1;
60 for_each_online_cpu(cpu) {
62 for (tmp = 10; cpu >= tmp; tmp *= 10)
64 seq_printf(m, "%*s%d", prec, "CPU", cpu);
67 } else if (n <= NR_DIAG_STAT) {
68 seq_printf(m, "diag %03x:", diag_map[n-1].code);
69 for_each_online_cpu(cpu) {
70 stat = &per_cpu(diag_stat, cpu);
71 seq_printf(m, " %10u", stat->counter[n-1]);
73 seq_printf(m, " %s\n", diag_map[n-1].name);
79 static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
81 return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
84 static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
87 return show_diag_stat_start(m, pos);
90 static void show_diag_stat_stop(struct seq_file *m, void *v)
94 static const struct seq_operations show_diag_stat_sops = {
95 .start = show_diag_stat_start,
96 .next = show_diag_stat_next,
97 .stop = show_diag_stat_stop,
98 .show = show_diag_stat,
101 static int show_diag_stat_open(struct inode *inode, struct file *file)
103 return seq_open(file, &show_diag_stat_sops);
106 static const struct file_operations show_diag_stat_fops = {
107 .open = show_diag_stat_open,
110 .release = seq_release,
114 static int __init show_diag_stat_init(void)
116 debugfs_create_file("diag_stat", 0400, NULL, NULL,
117 &show_diag_stat_fops);
121 device_initcall(show_diag_stat_init);
123 void diag_stat_inc(enum diag_stat_enum nr)
125 this_cpu_inc(diag_stat.counter[nr]);
126 trace_s390_diagnose(diag_map[nr].code);
128 EXPORT_SYMBOL(diag_stat_inc);
130 void diag_stat_inc_norecursion(enum diag_stat_enum nr)
132 this_cpu_inc(diag_stat.counter[nr]);
133 trace_s390_diagnose_norecursion(diag_map[nr].code);
135 EXPORT_SYMBOL(diag_stat_inc_norecursion);
138 * Diagnose 14: Input spool file manipulation
140 static inline int __diag14(unsigned long rx, unsigned long ry1,
141 unsigned long subcode)
143 register unsigned long _ry1 asm("2") = ry1;
144 register unsigned long _ry2 asm("3") = subcode;
153 : "=d" (rc), "+d" (_ry2)
154 : "d" (rx), "d" (_ry1)
160 int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
162 diag_stat_inc(DIAG_STAT_X014);
163 return __diag14(rx, ry1, subcode);
165 EXPORT_SYMBOL(diag14);
167 static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
169 register unsigned long _subcode asm("0") = *subcode;
170 register unsigned long _size asm("1") = size;
173 " diag %2,%0,0x204\n"
176 : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
181 int diag204(unsigned long subcode, unsigned long size, void *addr)
183 diag_stat_inc(DIAG_STAT_X204);
184 size = __diag204(&subcode, size, addr);
189 EXPORT_SYMBOL(diag204);
192 * Diagnose 210: Get information about a virtual device
194 int diag210(struct diag210 *addr)
197 * diag 210 needs its data below the 2GB border, so we
198 * use a static data area to be sure
200 static struct diag210 diag210_tmp;
201 static DEFINE_SPINLOCK(diag210_lock);
205 spin_lock_irqsave(&diag210_lock, flags);
208 diag_stat_inc(DIAG_STAT_X210);
217 : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
220 spin_unlock_irqrestore(&diag210_lock, flags);
224 EXPORT_SYMBOL(diag210);
226 int diag224(void *ptr)
228 int rc = -EOPNOTSUPP;
230 diag_stat_inc(DIAG_STAT_X224);
232 " diag %1,%2,0x224\n"
236 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
239 EXPORT_SYMBOL(diag224);
242 * Diagnose 26C: Access Certain System Information
244 static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode)
246 register unsigned long _req asm("2") = (addr_t) req;
247 register unsigned long _resp asm("3") = (addr_t) resp;
248 register unsigned long _subcode asm("4") = subcode;
249 register unsigned long _rc asm("5") = -EOPNOTSUPP;
253 " diag %[rx],%[ry],0x26c\n"
257 : [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode)
262 int diag26c(void *req, void *resp, enum diag26c_sc subcode)
264 diag_stat_inc(DIAG_STAT_X26C);
265 return __diag26c(req, resp, subcode);
267 EXPORT_SYMBOL(diag26c);