~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/s390/kernel/diag.c

Version: ~ [ linux-5.18 ] ~ [ linux-5.17.9 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.41 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.117 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.195 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.244 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.280 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.315 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 
 15 struct diag_stat {
 16         unsigned int counter[NR_DIAG_STAT];
 17 };
 18 
 19 static DEFINE_PER_CPU(struct diag_stat, diag_stat);
 20 
 21 struct diag_desc {
 22         int code;
 23         char *name;
 24 };
 25 
 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" },
 46 };
 47 
 48 static 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 
 77 static 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 
 82 static 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 
 88 static void show_diag_stat_stop(struct seq_file *m, void *v)
 89 {
 90 }
 91 
 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,
 97 };
 98 
 99 static int show_diag_stat_open(struct inode *inode, struct file *file)
100 {
101         return seq_open(file, &show_diag_stat_sops);
102 }
103 
104 static 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 
112 static 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 
119 device_initcall(show_diag_stat_init);
120 
121 void 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 }
126 EXPORT_SYMBOL(diag_stat_inc);
127 
128 void 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 }
133 EXPORT_SYMBOL(diag_stat_inc_norecursion);
134 
135 /*
136  * Diagnose 14: Input spool file manipulation
137  */
138 static 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 
158 int 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 }
163 EXPORT_SYMBOL(diag14);
164 
165 static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
166 {
167         register unsigned long _subcode asm("") = *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 
179 int 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 }
187 EXPORT_SYMBOL(diag204);
188 
189 /*
190  * Diagnose 210: Get information about a virtual device
191  */
192 int 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 }
222 EXPORT_SYMBOL(diag210);
223 
224 int 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 }
237 EXPORT_SYMBOL(diag224);
238 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp