2 * Implementation of s390 diagnose codes
4 * Copyright IBM Corp. 2007
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
8 #include <linux/module.h>
10 #include <linux/seq_file.h>
11 #include <linux/debugfs.h>
13 #include <asm/trace/diag.h>
16 unsigned int counter[NR_DIAG_STAT];
19 static DEFINE_PER_CPU(struct diag_stat, diag_stat);
26 static 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" },
48 static int show_diag_stat(struct seq_file *m, void *v)
50 struct diag_stat *stat;
51 unsigned long n = (unsigned long) v - 1;
58 for_each_online_cpu(cpu) {
60 for (tmp = 10; cpu >= tmp; tmp *= 10)
62 seq_printf(m, "%*s%d", prec, "CPU", cpu);
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]);
71 seq_printf(m, " %s\n", diag_map[n-1].name);
77 static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
79 return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
82 static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
85 return show_diag_stat_start(m, pos);
88 static void show_diag_stat_stop(struct seq_file *m, void *v)
92 static 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,
99 static int show_diag_stat_open(struct inode *inode, struct file *file)
101 return seq_open(file, &show_diag_stat_sops);
104 static const struct file_operations show_diag_stat_fops = {
105 .open = show_diag_stat_open,
108 .release = seq_release,
112 static int __init show_diag_stat_init(void)
114 debugfs_create_file("diag_stat", 0400, NULL, NULL,
115 &show_diag_stat_fops);
119 device_initcall(show_diag_stat_init);
121 void diag_stat_inc(enum diag_stat_enum nr)
123 this_cpu_inc(diag_stat.counter[nr]);
124 trace_s390_diagnose(diag_map[nr].code);
126 EXPORT_SYMBOL(diag_stat_inc);
128 void diag_stat_inc_norecursion(enum diag_stat_enum nr)
130 this_cpu_inc(diag_stat.counter[nr]);
131 trace_s390_diagnose_norecursion(diag_map[nr].code);
133 EXPORT_SYMBOL(diag_stat_inc_norecursion);
136 * Diagnose 14: Input spool file manipulation
138 static inline int __diag14(unsigned long rx, unsigned long ry1,
139 unsigned long subcode)
141 register unsigned long _ry1 asm("2") = ry1;
142 register unsigned long _ry2 asm("3") = subcode;
151 : "=d" (rc), "+d" (_ry2)
152 : "d" (rx), "d" (_ry1)
158 int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
160 diag_stat_inc(DIAG_STAT_X014);
161 return __diag14(rx, ry1, subcode);
163 EXPORT_SYMBOL(diag14);
166 * Diagnose 210: Get information about a virtual device
168 int diag210(struct diag210 *addr)
171 * diag 210 needs its data below the 2GB border, so we
172 * use a static data area to be sure
174 static struct diag210 diag210_tmp;
175 static DEFINE_SPINLOCK(diag210_lock);
179 spin_lock_irqsave(&diag210_lock, flags);
182 diag_stat_inc(DIAG_STAT_X210);
191 : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
194 spin_unlock_irqrestore(&diag210_lock, flags);
198 EXPORT_SYMBOL(diag210);