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 "entry.h"
 20
 21struct diag_stat {
 22	unsigned int counter[NR_DIAG_STAT];
 23};
 24
 25static DEFINE_PER_CPU(struct diag_stat, diag_stat);
 26
 27struct diag_desc {
 28	int code;
 29	char *name;
 30};
 31
 32static const struct diag_desc diag_map[NR_DIAG_STAT] = {
 33	[DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
 34	[DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
 35	[DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
 36	[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
 37	[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
 38	[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
 39	[DIAG_STAT_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" },
 40	[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
 41	[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
 42	[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
 43	[DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
 44	[DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
 45	[DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
 46	[DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
 47	[DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
 48	[DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
 49	[DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
 50	[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
 51	[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
 52	[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
 53	[DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
 54	[DIAG_STAT_X320] = { .code = 0x320, .name = "Certificate Store" },
 55	[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
 56};
 57
 58struct diag_ops __amode31_ref diag_amode31_ops = {
 59	.diag210 = _diag210_amode31,
 60	.diag26c = _diag26c_amode31,
 61	.diag14 = _diag14_amode31,
 62	.diag0c = _diag0c_amode31,
 63	.diag8c = _diag8c_amode31,
 64	.diag308_reset = _diag308_reset_amode31
 65};
 66
 67static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
 68struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
 69
 70static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data");
 71static struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31;
 72
 73static int show_diag_stat(struct seq_file *m, void *v)
 74{
 75	struct diag_stat *stat;
 76	unsigned long n = (unsigned long) v - 1;
 77	int cpu, prec, tmp;
 78
 79	cpus_read_lock();
 80	if (n == 0) {
 81		seq_puts(m, "         ");
 82
 83		for_each_online_cpu(cpu) {
 84			prec = 10;
 85			for (tmp = 10; cpu >= tmp; tmp *= 10)
 86				prec--;
 87			seq_printf(m, "%*s%d", prec, "CPU", cpu);
 88		}
 89		seq_putc(m, '\n');
 90	} else if (n <= NR_DIAG_STAT) {
 91		seq_printf(m, "diag %03x:", diag_map[n-1].code);
 92		for_each_online_cpu(cpu) {
 93			stat = &per_cpu(diag_stat, cpu);
 94			seq_printf(m, " %10u", stat->counter[n-1]);
 95		}
 96		seq_printf(m, "    %s\n", diag_map[n-1].name);
 97	}
 98	cpus_read_unlock();
 99	return 0;
100}
101
102static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
103{
104	return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
105}
106
107static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
108{
109	++*pos;
110	return show_diag_stat_start(m, pos);
111}
112
113static void show_diag_stat_stop(struct seq_file *m, void *v)
114{
115}
116
117static const struct seq_operations show_diag_stat_sops = {
118	.start	= show_diag_stat_start,
119	.next	= show_diag_stat_next,
120	.stop	= show_diag_stat_stop,
121	.show	= show_diag_stat,
122};
123
124DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
 
 
 
 
 
 
 
 
 
 
 
125
126static int __init show_diag_stat_init(void)
127{
128	debugfs_create_file("diag_stat", 0400, NULL, NULL,
129			    &show_diag_stat_fops);
130	return 0;
131}
132
133device_initcall(show_diag_stat_init);
134
135void diag_stat_inc(enum diag_stat_enum nr)
136{
137	this_cpu_inc(diag_stat.counter[nr]);
138	trace_s390_diagnose(diag_map[nr].code);
139}
140EXPORT_SYMBOL(diag_stat_inc);
141
142void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
143{
144	this_cpu_inc(diag_stat.counter[nr]);
145	trace_s390_diagnose_norecursion(diag_map[nr].code);
146}
147EXPORT_SYMBOL(diag_stat_inc_norecursion);
148
149/*
150 * Diagnose 14: Input spool file manipulation
151 */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
152int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
153{
154	diag_stat_inc(DIAG_STAT_X014);
155	return diag_amode31_ops.diag14(rx, ry1, subcode);
156}
157EXPORT_SYMBOL(diag14);
158
159static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
160{
161	union register_pair rp = { .even = *subcode, .odd = size };
 
162
163	asm volatile(
164		"	diag	%[addr],%[rp],0x204\n"
165		"0:	nopr	%%r7\n"
166		EX_TABLE(0b,0b)
167		: [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
168	*subcode = rp.even;
169	return rp.odd;
170}
171
172/**
173 * diag204() - Issue diagnose 204 call.
174 * @subcode: Subcode of diagnose 204 to be executed.
175 * @size: Size of area in pages which @area points to, if given.
176 * @addr: Vmalloc'ed memory area where the result is written to.
177 *
178 * Execute diagnose 204 with the given subcode and write the result to the
179 * memory area specified with @addr. For subcodes which do not write a
180 * result to memory both @size and @addr must be zero. If @addr is
181 * specified it must be page aligned and must have been allocated with
182 * vmalloc(). Conversion to real / physical addresses will be handled by
183 * this function if required.
184 */
185int diag204(unsigned long subcode, unsigned long size, void *addr)
186{
187	if (addr) {
188		if (WARN_ON_ONCE(!is_vmalloc_addr(addr)))
189			return -1;
190		if (WARN_ON_ONCE(!IS_ALIGNED((unsigned long)addr, PAGE_SIZE)))
191			return -1;
192	}
193	if ((subcode & DIAG204_SUBCODE_MASK) == DIAG204_SUBC_STIB4)
194		addr = (void *)pfn_to_phys(vmalloc_to_pfn(addr));
195	diag_stat_inc(DIAG_STAT_X204);
196	size = __diag204(&subcode, size, addr);
197	if (subcode)
198		return -1;
199	return size;
200}
201EXPORT_SYMBOL(diag204);
202
203/*
204 * Diagnose 210: Get information about a virtual device
205 */
206int diag210(struct diag210 *addr)
207{
 
 
 
 
 
208	static DEFINE_SPINLOCK(diag210_lock);
209	unsigned long flags;
210	int ccode;
211
212	spin_lock_irqsave(&diag210_lock, flags);
213	*__diag210_tmp_amode31 = *addr;
214
215	diag_stat_inc(DIAG_STAT_X210);
216	ccode = diag_amode31_ops.diag210(__diag210_tmp_amode31);
 
 
 
 
 
 
 
 
217
218	*addr = *__diag210_tmp_amode31;
219	spin_unlock_irqrestore(&diag210_lock, flags);
220
221	return ccode;
222}
223EXPORT_SYMBOL(diag210);
224
225/*
226 * Diagnose 8C: Access 3270 Display Device Information
227 */
228int diag8c(struct diag8c *addr, struct ccw_dev_id *devno)
229{
230	static DEFINE_SPINLOCK(diag8c_lock);
231	unsigned long flags;
232	int ccode;
233
234	spin_lock_irqsave(&diag8c_lock, flags);
235
236	diag_stat_inc(DIAG_STAT_X08C);
237	ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr));
238
239	*addr = *__diag8c_tmp_amode31;
240	spin_unlock_irqrestore(&diag8c_lock, flags);
241
242	return ccode;
243}
244EXPORT_SYMBOL(diag8c);
245
246int diag224(void *ptr)
247{
248	unsigned long addr = __pa(ptr);
249	int rc = -EOPNOTSUPP;
250
251	diag_stat_inc(DIAG_STAT_X224);
252	asm volatile(
253		"	diag	%1,%2,0x224\n"
254		"0:	lhi	%0,0x0\n"
255		"1:\n"
256		EX_TABLE(0b,1b)
257		: "+d" (rc) :"d" (0), "d" (addr) : "memory");
258	return rc;
259}
260EXPORT_SYMBOL(diag224);
261
262/*
263 * Diagnose 26C: Access Certain System Information
264 */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
265int diag26c(void *req, void *resp, enum diag26c_sc subcode)
266{
267	diag_stat_inc(DIAG_STAT_X26C);
268	return diag_amode31_ops.diag26c(req, resp, subcode);
269}
270EXPORT_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 <asm/diag.h>
 15#include <asm/trace/diag.h>
 
 
 16
 17struct diag_stat {
 18	unsigned int counter[NR_DIAG_STAT];
 19};
 20
 21static DEFINE_PER_CPU(struct diag_stat, diag_stat);
 22
 23struct diag_desc {
 24	int code;
 25	char *name;
 26};
 27
 28static const struct diag_desc diag_map[NR_DIAG_STAT] = {
 29	[DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
 30	[DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
 31	[DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
 32	[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
 33	[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
 34	[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
 
 35	[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
 36	[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
 37	[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
 38	[DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
 39	[DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
 40	[DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
 41	[DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
 42	[DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
 43	[DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
 44	[DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
 45	[DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
 46	[DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
 47	[DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
 
 
 48	[DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
 49};
 50
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 51static int show_diag_stat(struct seq_file *m, void *v)
 52{
 53	struct diag_stat *stat;
 54	unsigned long n = (unsigned long) v - 1;
 55	int cpu, prec, tmp;
 56
 57	get_online_cpus();
 58	if (n == 0) {
 59		seq_puts(m, "         ");
 60
 61		for_each_online_cpu(cpu) {
 62			prec = 10;
 63			for (tmp = 10; cpu >= tmp; tmp *= 10)
 64				prec--;
 65			seq_printf(m, "%*s%d", prec, "CPU", cpu);
 66		}
 67		seq_putc(m, '\n');
 68	} else if (n <= NR_DIAG_STAT) {
 69		seq_printf(m, "diag %03x:", diag_map[n-1].code);
 70		for_each_online_cpu(cpu) {
 71			stat = &per_cpu(diag_stat, cpu);
 72			seq_printf(m, " %10u", stat->counter[n-1]);
 73		}
 74		seq_printf(m, "    %s\n", diag_map[n-1].name);
 75	}
 76	put_online_cpus();
 77	return 0;
 78}
 79
 80static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
 81{
 82	return *pos <= nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
 83}
 84
 85static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
 86{
 87	++*pos;
 88	return show_diag_stat_start(m, pos);
 89}
 90
 91static void show_diag_stat_stop(struct seq_file *m, void *v)
 92{
 93}
 94
 95static const struct seq_operations show_diag_stat_sops = {
 96	.start	= show_diag_stat_start,
 97	.next	= show_diag_stat_next,
 98	.stop	= show_diag_stat_stop,
 99	.show	= show_diag_stat,
100};
101
102static int show_diag_stat_open(struct inode *inode, struct file *file)
103{
104	return seq_open(file, &show_diag_stat_sops);
105}
106
107static const struct file_operations show_diag_stat_fops = {
108	.open		= show_diag_stat_open,
109	.read		= seq_read,
110	.llseek		= seq_lseek,
111	.release	= seq_release,
112};
113
114
115static int __init show_diag_stat_init(void)
116{
117	debugfs_create_file("diag_stat", 0400, NULL, NULL,
118			    &show_diag_stat_fops);
119	return 0;
120}
121
122device_initcall(show_diag_stat_init);
123
124void diag_stat_inc(enum diag_stat_enum nr)
125{
126	this_cpu_inc(diag_stat.counter[nr]);
127	trace_s390_diagnose(diag_map[nr].code);
128}
129EXPORT_SYMBOL(diag_stat_inc);
130
131void diag_stat_inc_norecursion(enum diag_stat_enum nr)
132{
133	this_cpu_inc(diag_stat.counter[nr]);
134	trace_s390_diagnose_norecursion(diag_map[nr].code);
135}
136EXPORT_SYMBOL(diag_stat_inc_norecursion);
137
138/*
139 * Diagnose 14: Input spool file manipulation
140 */
141static inline int __diag14(unsigned long rx, unsigned long ry1,
142			   unsigned long subcode)
143{
144	register unsigned long _ry1 asm("2") = ry1;
145	register unsigned long _ry2 asm("3") = subcode;
146	int rc = 0;
147
148	asm volatile(
149		"   sam31\n"
150		"   diag    %2,2,0x14\n"
151		"   sam64\n"
152		"   ipm     %0\n"
153		"   srl     %0,28\n"
154		: "=d" (rc), "+d" (_ry2)
155		: "d" (rx), "d" (_ry1)
156		: "cc");
157
158	return rc;
159}
160
161int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
162{
163	diag_stat_inc(DIAG_STAT_X014);
164	return __diag14(rx, ry1, subcode);
165}
166EXPORT_SYMBOL(diag14);
167
168static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
169{
170	register unsigned long _subcode asm("0") = *subcode;
171	register unsigned long _size asm("1") = size;
172
173	asm volatile(
174		"	diag	%2,%0,0x204\n"
175		"0:	nopr	%%r7\n"
176		EX_TABLE(0b,0b)
177		: "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
178	*subcode = _subcode;
179	return _size;
180}
181
 
 
 
 
 
 
 
 
 
 
 
 
 
182int diag204(unsigned long subcode, unsigned long size, void *addr)
183{
 
 
 
 
 
 
 
 
184	diag_stat_inc(DIAG_STAT_X204);
185	size = __diag204(&subcode, size, addr);
186	if (subcode)
187		return -1;
188	return size;
189}
190EXPORT_SYMBOL(diag204);
191
192/*
193 * Diagnose 210: Get information about a virtual device
194 */
195int diag210(struct diag210 *addr)
196{
197	/*
198	 * diag 210 needs its data below the 2GB border, so we
199	 * use a static data area to be sure
200	 */
201	static struct diag210 diag210_tmp;
202	static DEFINE_SPINLOCK(diag210_lock);
203	unsigned long flags;
204	int ccode;
205
206	spin_lock_irqsave(&diag210_lock, flags);
207	diag210_tmp = *addr;
208
209	diag_stat_inc(DIAG_STAT_X210);
210	asm volatile(
211		"	lhi	%0,-1\n"
212		"	sam31\n"
213		"	diag	%1,0,0x210\n"
214		"0:	ipm	%0\n"
215		"	srl	%0,28\n"
216		"1:	sam64\n"
217		EX_TABLE(0b, 1b)
218		: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
219
220	*addr = diag210_tmp;
221	spin_unlock_irqrestore(&diag210_lock, flags);
222
223	return ccode;
224}
225EXPORT_SYMBOL(diag210);
226
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
227int diag224(void *ptr)
228{
 
229	int rc = -EOPNOTSUPP;
230
231	diag_stat_inc(DIAG_STAT_X224);
232	asm volatile(
233		"	diag	%1,%2,0x224\n"
234		"0:	lhi	%0,0x0\n"
235		"1:\n"
236		EX_TABLE(0b,1b)
237		: "+d" (rc) :"d" (0), "d" (ptr) : "memory");
238	return rc;
239}
240EXPORT_SYMBOL(diag224);
241
242/*
243 * Diagnose 26C: Access Certain System Information
244 */
245static inline int __diag26c(void *req, void *resp, enum diag26c_sc subcode)
246{
247	register unsigned long _req asm("2") = (addr_t) req;
248	register unsigned long _resp asm("3") = (addr_t) resp;
249	register unsigned long _subcode asm("4") = subcode;
250	register unsigned long _rc asm("5") = -EOPNOTSUPP;
251
252	asm volatile(
253		"	sam31\n"
254		"	diag	%[rx],%[ry],0x26c\n"
255		"0:	sam64\n"
256		EX_TABLE(0b,0b)
257		: "+d" (_rc)
258		: [rx] "d" (_req), "d" (_resp), [ry] "d" (_subcode)
259		: "cc", "memory");
260	return _rc;
261}
262
263int diag26c(void *req, void *resp, enum diag26c_sc subcode)
264{
265	diag_stat_inc(DIAG_STAT_X26C);
266	return __diag26c(req, resp, subcode);
267}
268EXPORT_SYMBOL(diag26c);