Commit | Line | Data |
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31cb4bd3 MH |
1 | /* |
2 | * Hypervisor filesystem for Linux on s390. z/VM implementation. | |
3 | * | |
4 | * Copyright (C) IBM Corp. 2006 | |
5 | * 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> | |
57b28f66 | 13 | #include <asm/timex.h> |
31cb4bd3 MH |
14 | #include "hypfs.h" |
15 | ||
16 | #define NAME_LEN 8 | |
57b28f66 | 17 | #define DBFS_D2FC_HDR_VERSION 0 |
31cb4bd3 MH |
18 | |
19 | static char local_guest[] = " "; | |
20 | static char all_guests[] = "* "; | |
21 | static char *guest_query; | |
22 | ||
23 | struct 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 | ||
47 | struct 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 | ||
55 | static 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 | ||
57b28f66 MH |
81 | /* |
82 | * Allocate buffer for "query" and store diag 2fc at "offset" | |
83 | */ | |
84 | static void *diag2fc_store(char *query, unsigned int *count, int offset) | |
31cb4bd3 | 85 | { |
57b28f66 | 86 | void *data; |
31cb4bd3 | 87 | int size; |
31cb4bd3 MH |
88 | |
89 | do { | |
90 | size = diag2fc(0, query, NULL); | |
91 | if (size < 0) | |
92 | return ERR_PTR(-EACCES); | |
57b28f66 | 93 | data = vmalloc(size + offset); |
31cb4bd3 MH |
94 | if (!data) |
95 | return ERR_PTR(-ENOMEM); | |
57b28f66 | 96 | if (diag2fc(size, query, data + offset) == 0) |
31cb4bd3 MH |
97 | break; |
98 | vfree(data); | |
99 | } while (1); | |
57b28f66 | 100 | *count = (size / sizeof(struct diag2fc_data)); |
31cb4bd3 MH |
101 | |
102 | return data; | |
103 | } | |
104 | ||
2fcb3686 | 105 | static void diag2fc_free(const void *data) |
31cb4bd3 MH |
106 | { |
107 | vfree(data); | |
108 | } | |
109 | ||
110 | #define ATTRIBUTE(sb, dir, name, member) \ | |
111 | do { \ | |
112 | void *rc; \ | |
113 | rc = hypfs_create_u64(sb, dir, name, member); \ | |
114 | if (IS_ERR(rc)) \ | |
115 | return PTR_ERR(rc); \ | |
116 | } while(0) | |
117 | ||
118 | static int hpyfs_vm_create_guest(struct super_block *sb, | |
119 | struct dentry *systems_dir, | |
120 | struct diag2fc_data *data) | |
121 | { | |
122 | char guest_name[NAME_LEN + 1] = {}; | |
123 | struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir; | |
124 | int dedicated_flag, capped_value; | |
125 | ||
126 | capped_value = (data->flags & 0x00000006) >> 1; | |
127 | dedicated_flag = (data->flags & 0x00000008) >> 3; | |
128 | ||
129 | /* guest dir */ | |
130 | memcpy(guest_name, data->guest_name, NAME_LEN); | |
131 | EBCASC(guest_name, NAME_LEN); | |
1d802e24 | 132 | strim(guest_name); |
31cb4bd3 MH |
133 | guest_dir = hypfs_mkdir(sb, systems_dir, guest_name); |
134 | if (IS_ERR(guest_dir)) | |
135 | return PTR_ERR(guest_dir); | |
136 | ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time); | |
137 | ||
138 | /* logical cpu information */ | |
139 | cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus"); | |
140 | if (IS_ERR(cpus_dir)) | |
141 | return PTR_ERR(cpus_dir); | |
142 | ATTRIBUTE(sb, cpus_dir, "cputime_us", data->used_cpu); | |
143 | ATTRIBUTE(sb, cpus_dir, "capped", capped_value); | |
144 | ATTRIBUTE(sb, cpus_dir, "dedicated", dedicated_flag); | |
145 | ATTRIBUTE(sb, cpus_dir, "count", data->vcpus); | |
146 | ATTRIBUTE(sb, cpus_dir, "weight_min", data->cpu_min); | |
147 | ATTRIBUTE(sb, cpus_dir, "weight_max", data->cpu_max); | |
148 | ATTRIBUTE(sb, cpus_dir, "weight_cur", data->cpu_shares); | |
149 | ||
150 | /* memory information */ | |
151 | mem_dir = hypfs_mkdir(sb, guest_dir, "mem"); | |
152 | if (IS_ERR(mem_dir)) | |
153 | return PTR_ERR(mem_dir); | |
154 | ATTRIBUTE(sb, mem_dir, "min_KiB", data->mem_min_kb); | |
155 | ATTRIBUTE(sb, mem_dir, "max_KiB", data->mem_max_kb); | |
156 | ATTRIBUTE(sb, mem_dir, "used_KiB", data->mem_used_kb); | |
157 | ATTRIBUTE(sb, mem_dir, "share_KiB", data->mem_share_kb); | |
158 | ||
159 | /* samples */ | |
160 | samples_dir = hypfs_mkdir(sb, guest_dir, "samples"); | |
161 | if (IS_ERR(samples_dir)) | |
162 | return PTR_ERR(samples_dir); | |
163 | ATTRIBUTE(sb, samples_dir, "cpu_using", data->cpu_use_samp); | |
164 | ATTRIBUTE(sb, samples_dir, "cpu_delay", data->cpu_delay_samp); | |
165 | ATTRIBUTE(sb, samples_dir, "mem_delay", data->page_wait_samp); | |
166 | ATTRIBUTE(sb, samples_dir, "idle", data->idle_samp); | |
167 | ATTRIBUTE(sb, samples_dir, "other", data->other_samp); | |
168 | ATTRIBUTE(sb, samples_dir, "total", data->total_samp); | |
169 | return 0; | |
170 | } | |
171 | ||
172 | int hypfs_vm_create_files(struct super_block *sb, struct dentry *root) | |
173 | { | |
174 | struct dentry *dir, *file; | |
175 | struct diag2fc_data *data; | |
57b28f66 MH |
176 | unsigned int count = 0; |
177 | int rc, i; | |
31cb4bd3 | 178 | |
57b28f66 | 179 | data = diag2fc_store(guest_query, &count, 0); |
31cb4bd3 MH |
180 | if (IS_ERR(data)) |
181 | return PTR_ERR(data); | |
182 | ||
183 | /* Hpervisor Info */ | |
184 | dir = hypfs_mkdir(sb, root, "hyp"); | |
185 | if (IS_ERR(dir)) { | |
186 | rc = PTR_ERR(dir); | |
187 | goto failed; | |
188 | } | |
189 | file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor"); | |
190 | if (IS_ERR(file)) { | |
191 | rc = PTR_ERR(file); | |
192 | goto failed; | |
193 | } | |
194 | ||
195 | /* physical cpus */ | |
196 | dir = hypfs_mkdir(sb, root, "cpus"); | |
197 | if (IS_ERR(dir)) { | |
198 | rc = PTR_ERR(dir); | |
199 | goto failed; | |
200 | } | |
201 | file = hypfs_create_u64(sb, dir, "count", data->lcpus); | |
202 | if (IS_ERR(file)) { | |
203 | rc = PTR_ERR(file); | |
204 | goto failed; | |
205 | } | |
206 | ||
207 | /* guests */ | |
208 | dir = hypfs_mkdir(sb, root, "systems"); | |
209 | if (IS_ERR(dir)) { | |
210 | rc = PTR_ERR(dir); | |
211 | goto failed; | |
212 | } | |
213 | ||
214 | for (i = 0; i < count; i++) { | |
215 | rc = hpyfs_vm_create_guest(sb, dir, &(data[i])); | |
216 | if (rc) | |
217 | goto failed; | |
218 | } | |
219 | diag2fc_free(data); | |
220 | return 0; | |
221 | ||
222 | failed: | |
223 | diag2fc_free(data); | |
224 | return rc; | |
225 | } | |
226 | ||
57b28f66 MH |
227 | struct dbfs_d2fc_hdr { |
228 | u64 len; /* Length of d2fc buffer without header */ | |
229 | u16 version; /* Version of header */ | |
230 | char tod_ext[16]; /* TOD clock for d2fc */ | |
231 | u64 count; /* Number of VM guests in d2fc buffer */ | |
232 | char reserved[30]; | |
233 | } __attribute__ ((packed)); | |
234 | ||
235 | struct dbfs_d2fc { | |
236 | struct dbfs_d2fc_hdr hdr; /* 64 byte header */ | |
237 | char buf[]; /* d2fc buffer */ | |
238 | } __attribute__ ((packed)); | |
239 | ||
2fcb3686 | 240 | static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size) |
57b28f66 | 241 | { |
2fcb3686 | 242 | struct dbfs_d2fc *d2fc; |
57b28f66 MH |
243 | unsigned int count; |
244 | ||
2fcb3686 MH |
245 | d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr)); |
246 | if (IS_ERR(d2fc)) | |
247 | return PTR_ERR(d2fc); | |
248 | get_clock_ext(d2fc->hdr.tod_ext); | |
249 | d2fc->hdr.len = count * sizeof(struct diag2fc_data); | |
250 | d2fc->hdr.version = DBFS_D2FC_HDR_VERSION; | |
251 | d2fc->hdr.count = count; | |
252 | memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved)); | |
253 | *data = d2fc; | |
254 | *data_free_ptr = d2fc; | |
255 | *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr); | |
57b28f66 MH |
256 | return 0; |
257 | } | |
258 | ||
2fcb3686 MH |
259 | static struct hypfs_dbfs_file dbfs_file_2fc = { |
260 | .name = "diag_2fc", | |
261 | .data_create = dbfs_diag2fc_create, | |
262 | .data_free = diag2fc_free, | |
57b28f66 MH |
263 | }; |
264 | ||
31cb4bd3 MH |
265 | int hypfs_vm_init(void) |
266 | { | |
57b28f66 MH |
267 | if (!MACHINE_IS_VM) |
268 | return 0; | |
31cb4bd3 MH |
269 | if (diag2fc(0, all_guests, NULL) > 0) |
270 | guest_query = all_guests; | |
271 | else if (diag2fc(0, local_guest, NULL) > 0) | |
272 | guest_query = local_guest; | |
273 | else | |
274 | return -EACCES; | |
2fcb3686 | 275 | return hypfs_dbfs_create_file(&dbfs_file_2fc); |
31cb4bd3 | 276 | } |
57b28f66 MH |
277 | |
278 | void hypfs_vm_exit(void) | |
279 | { | |
280 | if (!MACHINE_IS_VM) | |
281 | return; | |
2fcb3686 | 282 | hypfs_dbfs_remove_file(&dbfs_file_2fc); |
57b28f66 | 283 | } |