blob: 24908ce149f15c89f1fbf5f4c8cc0b09b8a9ec13 [file] [log] [blame]
Michael Holzheu31cb4bd2007-02-05 21:18:29 +01001/*
2 * Hypervisor filesystem for Linux on s390. z/VM implementation.
3 *
Heiko Carstensa53c8fa2012-07-20 11:15:04 +02004 * Copyright IBM Corp. 2006
Michael Holzheu31cb4bd2007-02-05 21:18:29 +01005 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 */
7
8#include <linux/types.h>
9#include <linux/errno.h>
10#include <linux/string.h>
11#include <linux/vmalloc.h>
12#include <asm/ebcdic.h>
Michael Holzheu57b28f62010-05-17 10:00:20 +020013#include <asm/timex.h>
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010014#include "hypfs.h"
15
16#define NAME_LEN 8
Michael Holzheu57b28f62010-05-17 10:00:20 +020017#define DBFS_D2FC_HDR_VERSION 0
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010018
19static char local_guest[] = " ";
20static char all_guests[] = "* ";
21static char *guest_query;
22
23struct diag2fc_data {
24 __u32 version;
25 __u32 flags;
26 __u64 used_cpu;
27 __u64 el_time;
28 __u64 mem_min_kb;
29 __u64 mem_max_kb;
30 __u64 mem_share_kb;
31 __u64 mem_used_kb;
32 __u32 pcpus;
33 __u32 lcpus;
34 __u32 vcpus;
35 __u32 cpu_min;
36 __u32 cpu_max;
37 __u32 cpu_shares;
38 __u32 cpu_use_samp;
39 __u32 cpu_delay_samp;
40 __u32 page_wait_samp;
41 __u32 idle_samp;
42 __u32 other_samp;
43 __u32 total_samp;
44 char guest_name[NAME_LEN];
45};
46
47struct diag2fc_parm_list {
48 char userid[NAME_LEN];
49 char aci_grp[NAME_LEN];
50 __u64 addr;
51 __u32 size;
52 __u32 fmt;
53};
54
55static int diag2fc(int size, char* query, void *addr)
56{
57 unsigned long residual_cnt;
58 unsigned long rc;
59 struct diag2fc_parm_list parm_list;
60
61 memcpy(parm_list.userid, query, NAME_LEN);
62 ASCEBC(parm_list.userid, NAME_LEN);
63 parm_list.addr = (unsigned long) addr ;
64 parm_list.size = size;
65 parm_list.fmt = 0x02;
66 memset(parm_list.aci_grp, 0x40, NAME_LEN);
67 rc = -1;
68
69 asm volatile(
70 " diag %0,%1,0x2fc\n"
71 "0:\n"
72 EX_TABLE(0b,0b)
73 : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory");
74
75 if ((rc != 0 ) && (rc != -2))
76 return rc;
77 else
78 return -residual_cnt;
79}
80
Michael Holzheu57b28f62010-05-17 10:00:20 +020081/*
82 * Allocate buffer for "query" and store diag 2fc at "offset"
83 */
84static void *diag2fc_store(char *query, unsigned int *count, int offset)
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010085{
Michael Holzheu57b28f62010-05-17 10:00:20 +020086 void *data;
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010087 int size;
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010088
89 do {
90 size = diag2fc(0, query, NULL);
91 if (size < 0)
92 return ERR_PTR(-EACCES);
Michael Holzheu57b28f62010-05-17 10:00:20 +020093 data = vmalloc(size + offset);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010094 if (!data)
95 return ERR_PTR(-ENOMEM);
Michael Holzheu57b28f62010-05-17 10:00:20 +020096 if (diag2fc(size, query, data + offset) == 0)
Michael Holzheu31cb4bd2007-02-05 21:18:29 +010097 break;
98 vfree(data);
99 } while (1);
Michael Holzheu57b28f62010-05-17 10:00:20 +0200100 *count = (size / sizeof(struct diag2fc_data));
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100101
102 return data;
103}
104
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100105static void diag2fc_free(const void *data)
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100106{
107 vfree(data);
108}
109
Al Virof78e41e2013-07-19 17:03:49 +0400110#define ATTRIBUTE(dir, name, member) \
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100111do { \
112 void *rc; \
Al Viroa118cfd2013-07-19 18:05:21 +0400113 rc = hypfs_create_u64(dir, name, member); \
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100114 if (IS_ERR(rc)) \
115 return PTR_ERR(rc); \
116} while(0)
117
Al Virof78e41e2013-07-19 17:03:49 +0400118static int hpyfs_vm_create_guest(struct dentry *systems_dir,
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100119 struct diag2fc_data *data)
120{
121 char guest_name[NAME_LEN + 1] = {};
122 struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir;
123 int dedicated_flag, capped_value;
124
125 capped_value = (data->flags & 0x00000006) >> 1;
126 dedicated_flag = (data->flags & 0x00000008) >> 3;
127
128 /* guest dir */
129 memcpy(guest_name, data->guest_name, NAME_LEN);
130 EBCASC(guest_name, NAME_LEN);
Heiko Carstens1d802e22009-12-18 17:43:27 +0100131 strim(guest_name);
Al Viroa118cfd2013-07-19 18:05:21 +0400132 guest_dir = hypfs_mkdir(systems_dir, guest_name);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100133 if (IS_ERR(guest_dir))
134 return PTR_ERR(guest_dir);
Al Virof78e41e2013-07-19 17:03:49 +0400135 ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100136
137 /* logical cpu information */
Al Viroa118cfd2013-07-19 18:05:21 +0400138 cpus_dir = hypfs_mkdir(guest_dir, "cpus");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100139 if (IS_ERR(cpus_dir))
140 return PTR_ERR(cpus_dir);
Al Virof78e41e2013-07-19 17:03:49 +0400141 ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu);
142 ATTRIBUTE(cpus_dir, "capped", capped_value);
143 ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag);
144 ATTRIBUTE(cpus_dir, "count", data->vcpus);
145 ATTRIBUTE(cpus_dir, "weight_min", data->cpu_min);
146 ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max);
147 ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100148
149 /* memory information */
Al Viroa118cfd2013-07-19 18:05:21 +0400150 mem_dir = hypfs_mkdir(guest_dir, "mem");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100151 if (IS_ERR(mem_dir))
152 return PTR_ERR(mem_dir);
Al Virof78e41e2013-07-19 17:03:49 +0400153 ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb);
154 ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb);
155 ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb);
156 ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100157
158 /* samples */
Al Viroa118cfd2013-07-19 18:05:21 +0400159 samples_dir = hypfs_mkdir(guest_dir, "samples");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100160 if (IS_ERR(samples_dir))
161 return PTR_ERR(samples_dir);
Al Virof78e41e2013-07-19 17:03:49 +0400162 ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp);
163 ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp);
164 ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp);
165 ATTRIBUTE(samples_dir, "idle", data->idle_samp);
166 ATTRIBUTE(samples_dir, "other", data->other_samp);
167 ATTRIBUTE(samples_dir, "total", data->total_samp);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100168 return 0;
169}
170
Al Virof78e41e2013-07-19 17:03:49 +0400171int hypfs_vm_create_files(struct dentry *root)
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100172{
173 struct dentry *dir, *file;
174 struct diag2fc_data *data;
Michael Holzheu57b28f62010-05-17 10:00:20 +0200175 unsigned int count = 0;
176 int rc, i;
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100177
Michael Holzheu57b28f62010-05-17 10:00:20 +0200178 data = diag2fc_store(guest_query, &count, 0);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100179 if (IS_ERR(data))
180 return PTR_ERR(data);
181
182 /* Hpervisor Info */
Al Viroa118cfd2013-07-19 18:05:21 +0400183 dir = hypfs_mkdir(root, "hyp");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100184 if (IS_ERR(dir)) {
185 rc = PTR_ERR(dir);
186 goto failed;
187 }
Al Viroa118cfd2013-07-19 18:05:21 +0400188 file = hypfs_create_str(dir, "type", "z/VM Hypervisor");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100189 if (IS_ERR(file)) {
190 rc = PTR_ERR(file);
191 goto failed;
192 }
193
194 /* physical cpus */
Al Viroa118cfd2013-07-19 18:05:21 +0400195 dir = hypfs_mkdir(root, "cpus");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100196 if (IS_ERR(dir)) {
197 rc = PTR_ERR(dir);
198 goto failed;
199 }
Al Viroa118cfd2013-07-19 18:05:21 +0400200 file = hypfs_create_u64(dir, "count", data->lcpus);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100201 if (IS_ERR(file)) {
202 rc = PTR_ERR(file);
203 goto failed;
204 }
205
206 /* guests */
Al Viroa118cfd2013-07-19 18:05:21 +0400207 dir = hypfs_mkdir(root, "systems");
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100208 if (IS_ERR(dir)) {
209 rc = PTR_ERR(dir);
210 goto failed;
211 }
212
213 for (i = 0; i < count; i++) {
Al Virof78e41e2013-07-19 17:03:49 +0400214 rc = hpyfs_vm_create_guest(dir, &(data[i]));
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100215 if (rc)
216 goto failed;
217 }
218 diag2fc_free(data);
219 return 0;
220
221failed:
222 diag2fc_free(data);
223 return rc;
224}
225
Michael Holzheu57b28f62010-05-17 10:00:20 +0200226struct dbfs_d2fc_hdr {
227 u64 len; /* Length of d2fc buffer without header */
228 u16 version; /* Version of header */
229 char tod_ext[16]; /* TOD clock for d2fc */
230 u64 count; /* Number of VM guests in d2fc buffer */
231 char reserved[30];
232} __attribute__ ((packed));
233
234struct dbfs_d2fc {
235 struct dbfs_d2fc_hdr hdr; /* 64 byte header */
236 char buf[]; /* d2fc buffer */
237} __attribute__ ((packed));
238
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100239static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
Michael Holzheu57b28f62010-05-17 10:00:20 +0200240{
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100241 struct dbfs_d2fc *d2fc;
Michael Holzheu57b28f62010-05-17 10:00:20 +0200242 unsigned int count;
243
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100244 d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
245 if (IS_ERR(d2fc))
246 return PTR_ERR(d2fc);
Heiko Carstens1aae0562013-01-30 09:49:40 +0100247 get_tod_clock_ext(d2fc->hdr.tod_ext);
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100248 d2fc->hdr.len = count * sizeof(struct diag2fc_data);
249 d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
250 d2fc->hdr.count = count;
251 memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved));
252 *data = d2fc;
253 *data_free_ptr = d2fc;
254 *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr);
Michael Holzheu57b28f62010-05-17 10:00:20 +0200255 return 0;
256}
257
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100258static struct hypfs_dbfs_file dbfs_file_2fc = {
259 .name = "diag_2fc",
260 .data_create = dbfs_diag2fc_create,
261 .data_free = diag2fc_free,
Michael Holzheu57b28f62010-05-17 10:00:20 +0200262};
263
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100264int hypfs_vm_init(void)
265{
Michael Holzheu57b28f62010-05-17 10:00:20 +0200266 if (!MACHINE_IS_VM)
267 return 0;
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100268 if (diag2fc(0, all_guests, NULL) > 0)
269 guest_query = all_guests;
270 else if (diag2fc(0, local_guest, NULL) > 0)
271 guest_query = local_guest;
272 else
273 return -EACCES;
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100274 return hypfs_dbfs_create_file(&dbfs_file_2fc);
Michael Holzheu31cb4bd2007-02-05 21:18:29 +0100275}
Michael Holzheu57b28f62010-05-17 10:00:20 +0200276
277void hypfs_vm_exit(void)
278{
279 if (!MACHINE_IS_VM)
280 return;
Michael Holzheu2fcb3682011-01-05 12:47:43 +0100281 hypfs_dbfs_remove_file(&dbfs_file_2fc);
Michael Holzheu57b28f62010-05-17 10:00:20 +0200282}