Commit | Line | Data |
---|---|---|
31cb4bd3 MH |
1 | /* |
2 | * Hypervisor filesystem for Linux on s390. z/VM implementation. | |
3 | * | |
a53c8fab | 4 | * Copyright IBM Corp. 2006 |
31cb4bd3 MH |
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> | |
1ec2772e | 12 | #include <asm/diag.h> |
31cb4bd3 | 13 | #include <asm/ebcdic.h> |
57b28f66 | 14 | #include <asm/timex.h> |
31cb4bd3 MH |
15 | #include "hypfs.h" |
16 | ||
17 | #define NAME_LEN 8 | |
57b28f66 | 18 | #define DBFS_D2FC_HDR_VERSION 0 |
31cb4bd3 MH |
19 | |
20 | static char local_guest[] = " "; | |
21 | static char all_guests[] = "* "; | |
22 | static char *guest_query; | |
23 | ||
24 | struct diag2fc_data { | |
25 | __u32 version; | |
26 | __u32 flags; | |
27 | __u64 used_cpu; | |
28 | __u64 el_time; | |
29 | __u64 mem_min_kb; | |
30 | __u64 mem_max_kb; | |
31 | __u64 mem_share_kb; | |
32 | __u64 mem_used_kb; | |
33 | __u32 pcpus; | |
34 | __u32 lcpus; | |
35 | __u32 vcpus; | |
36a55402 | 36 | __u32 ocpus; |
31cb4bd3 MH |
37 | __u32 cpu_max; |
38 | __u32 cpu_shares; | |
39 | __u32 cpu_use_samp; | |
40 | __u32 cpu_delay_samp; | |
41 | __u32 page_wait_samp; | |
42 | __u32 idle_samp; | |
43 | __u32 other_samp; | |
44 | __u32 total_samp; | |
45 | char guest_name[NAME_LEN]; | |
46 | }; | |
47 | ||
48 | struct diag2fc_parm_list { | |
49 | char userid[NAME_LEN]; | |
50 | char aci_grp[NAME_LEN]; | |
51 | __u64 addr; | |
52 | __u32 size; | |
53 | __u32 fmt; | |
54 | }; | |
55 | ||
56 | static int diag2fc(int size, char* query, void *addr) | |
57 | { | |
58 | unsigned long residual_cnt; | |
59 | unsigned long rc; | |
60 | struct diag2fc_parm_list parm_list; | |
61 | ||
62 | memcpy(parm_list.userid, query, NAME_LEN); | |
63 | ASCEBC(parm_list.userid, NAME_LEN); | |
64 | parm_list.addr = (unsigned long) addr ; | |
65 | parm_list.size = size; | |
66 | parm_list.fmt = 0x02; | |
67 | memset(parm_list.aci_grp, 0x40, NAME_LEN); | |
68 | rc = -1; | |
69 | ||
1ec2772e | 70 | diag_stat_inc(DIAG_STAT_X2FC); |
31cb4bd3 MH |
71 | asm volatile( |
72 | " diag %0,%1,0x2fc\n" | |
6c22c986 | 73 | "0: nopr %%r7\n" |
31cb4bd3 MH |
74 | EX_TABLE(0b,0b) |
75 | : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory"); | |
76 | ||
77 | if ((rc != 0 ) && (rc != -2)) | |
78 | return rc; | |
79 | else | |
80 | return -residual_cnt; | |
81 | } | |
82 | ||
57b28f66 MH |
83 | /* |
84 | * Allocate buffer for "query" and store diag 2fc at "offset" | |
85 | */ | |
86 | static void *diag2fc_store(char *query, unsigned int *count, int offset) | |
31cb4bd3 | 87 | { |
57b28f66 | 88 | void *data; |
31cb4bd3 | 89 | int size; |
31cb4bd3 MH |
90 | |
91 | do { | |
92 | size = diag2fc(0, query, NULL); | |
93 | if (size < 0) | |
94 | return ERR_PTR(-EACCES); | |
57b28f66 | 95 | data = vmalloc(size + offset); |
31cb4bd3 MH |
96 | if (!data) |
97 | return ERR_PTR(-ENOMEM); | |
57b28f66 | 98 | if (diag2fc(size, query, data + offset) == 0) |
31cb4bd3 MH |
99 | break; |
100 | vfree(data); | |
101 | } while (1); | |
57b28f66 | 102 | *count = (size / sizeof(struct diag2fc_data)); |
31cb4bd3 MH |
103 | |
104 | return data; | |
105 | } | |
106 | ||
2fcb3686 | 107 | static void diag2fc_free(const void *data) |
31cb4bd3 MH |
108 | { |
109 | vfree(data); | |
110 | } | |
111 | ||
f78e41e3 | 112 | #define ATTRIBUTE(dir, name, member) \ |
31cb4bd3 MH |
113 | do { \ |
114 | void *rc; \ | |
a118cfdf | 115 | rc = hypfs_create_u64(dir, name, member); \ |
31cb4bd3 MH |
116 | if (IS_ERR(rc)) \ |
117 | return PTR_ERR(rc); \ | |
118 | } while(0) | |
119 | ||
f78e41e3 | 120 | static int hpyfs_vm_create_guest(struct dentry *systems_dir, |
31cb4bd3 MH |
121 | struct diag2fc_data *data) |
122 | { | |
123 | char guest_name[NAME_LEN + 1] = {}; | |
124 | struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir; | |
125 | int dedicated_flag, capped_value; | |
126 | ||
127 | capped_value = (data->flags & 0x00000006) >> 1; | |
128 | dedicated_flag = (data->flags & 0x00000008) >> 3; | |
129 | ||
130 | /* guest dir */ | |
131 | memcpy(guest_name, data->guest_name, NAME_LEN); | |
132 | EBCASC(guest_name, NAME_LEN); | |
1d802e24 | 133 | strim(guest_name); |
a118cfdf | 134 | guest_dir = hypfs_mkdir(systems_dir, guest_name); |
31cb4bd3 MH |
135 | if (IS_ERR(guest_dir)) |
136 | return PTR_ERR(guest_dir); | |
f78e41e3 | 137 | ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time); |
31cb4bd3 MH |
138 | |
139 | /* logical cpu information */ | |
a118cfdf | 140 | cpus_dir = hypfs_mkdir(guest_dir, "cpus"); |
31cb4bd3 MH |
141 | if (IS_ERR(cpus_dir)) |
142 | return PTR_ERR(cpus_dir); | |
f78e41e3 AV |
143 | ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu); |
144 | ATTRIBUTE(cpus_dir, "capped", capped_value); | |
145 | ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag); | |
146 | ATTRIBUTE(cpus_dir, "count", data->vcpus); | |
36a55402 MH |
147 | /* |
148 | * Note: The "weight_min" attribute got the wrong name. | |
149 | * The value represents the number of non-stopped (operating) | |
150 | * CPUS. | |
151 | */ | |
152 | ATTRIBUTE(cpus_dir, "weight_min", data->ocpus); | |
f78e41e3 AV |
153 | ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max); |
154 | ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares); | |
31cb4bd3 MH |
155 | |
156 | /* memory information */ | |
a118cfdf | 157 | mem_dir = hypfs_mkdir(guest_dir, "mem"); |
31cb4bd3 MH |
158 | if (IS_ERR(mem_dir)) |
159 | return PTR_ERR(mem_dir); | |
f78e41e3 AV |
160 | ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb); |
161 | ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb); | |
162 | ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb); | |
163 | ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb); | |
31cb4bd3 MH |
164 | |
165 | /* samples */ | |
a118cfdf | 166 | samples_dir = hypfs_mkdir(guest_dir, "samples"); |
31cb4bd3 MH |
167 | if (IS_ERR(samples_dir)) |
168 | return PTR_ERR(samples_dir); | |
f78e41e3 AV |
169 | ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp); |
170 | ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp); | |
171 | ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp); | |
172 | ATTRIBUTE(samples_dir, "idle", data->idle_samp); | |
173 | ATTRIBUTE(samples_dir, "other", data->other_samp); | |
174 | ATTRIBUTE(samples_dir, "total", data->total_samp); | |
31cb4bd3 MH |
175 | return 0; |
176 | } | |
177 | ||
f78e41e3 | 178 | int hypfs_vm_create_files(struct dentry *root) |
31cb4bd3 MH |
179 | { |
180 | struct dentry *dir, *file; | |
181 | struct diag2fc_data *data; | |
57b28f66 MH |
182 | unsigned int count = 0; |
183 | int rc, i; | |
31cb4bd3 | 184 | |
57b28f66 | 185 | data = diag2fc_store(guest_query, &count, 0); |
31cb4bd3 MH |
186 | if (IS_ERR(data)) |
187 | return PTR_ERR(data); | |
188 | ||
189 | /* Hpervisor Info */ | |
a118cfdf | 190 | dir = hypfs_mkdir(root, "hyp"); |
31cb4bd3 MH |
191 | if (IS_ERR(dir)) { |
192 | rc = PTR_ERR(dir); | |
193 | goto failed; | |
194 | } | |
a118cfdf | 195 | file = hypfs_create_str(dir, "type", "z/VM Hypervisor"); |
31cb4bd3 MH |
196 | if (IS_ERR(file)) { |
197 | rc = PTR_ERR(file); | |
198 | goto failed; | |
199 | } | |
200 | ||
201 | /* physical cpus */ | |
a118cfdf | 202 | dir = hypfs_mkdir(root, "cpus"); |
31cb4bd3 MH |
203 | if (IS_ERR(dir)) { |
204 | rc = PTR_ERR(dir); | |
205 | goto failed; | |
206 | } | |
a118cfdf | 207 | file = hypfs_create_u64(dir, "count", data->lcpus); |
31cb4bd3 MH |
208 | if (IS_ERR(file)) { |
209 | rc = PTR_ERR(file); | |
210 | goto failed; | |
211 | } | |
212 | ||
213 | /* guests */ | |
a118cfdf | 214 | dir = hypfs_mkdir(root, "systems"); |
31cb4bd3 MH |
215 | if (IS_ERR(dir)) { |
216 | rc = PTR_ERR(dir); | |
217 | goto failed; | |
218 | } | |
219 | ||
220 | for (i = 0; i < count; i++) { | |
f78e41e3 | 221 | rc = hpyfs_vm_create_guest(dir, &(data[i])); |
31cb4bd3 MH |
222 | if (rc) |
223 | goto failed; | |
224 | } | |
225 | diag2fc_free(data); | |
226 | return 0; | |
227 | ||
228 | failed: | |
229 | diag2fc_free(data); | |
230 | return rc; | |
231 | } | |
232 | ||
57b28f66 MH |
233 | struct dbfs_d2fc_hdr { |
234 | u64 len; /* Length of d2fc buffer without header */ | |
235 | u16 version; /* Version of header */ | |
e38f9781 | 236 | char tod_ext[STORE_CLOCK_EXT_SIZE]; /* TOD clock for d2fc */ |
57b28f66 MH |
237 | u64 count; /* Number of VM guests in d2fc buffer */ |
238 | char reserved[30]; | |
239 | } __attribute__ ((packed)); | |
240 | ||
241 | struct dbfs_d2fc { | |
242 | struct dbfs_d2fc_hdr hdr; /* 64 byte header */ | |
243 | char buf[]; /* d2fc buffer */ | |
244 | } __attribute__ ((packed)); | |
245 | ||
2fcb3686 | 246 | static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size) |
57b28f66 | 247 | { |
2fcb3686 | 248 | struct dbfs_d2fc *d2fc; |
57b28f66 MH |
249 | unsigned int count; |
250 | ||
2fcb3686 MH |
251 | d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr)); |
252 | if (IS_ERR(d2fc)) | |
253 | return PTR_ERR(d2fc); | |
1aae0560 | 254 | get_tod_clock_ext(d2fc->hdr.tod_ext); |
2fcb3686 MH |
255 | d2fc->hdr.len = count * sizeof(struct diag2fc_data); |
256 | d2fc->hdr.version = DBFS_D2FC_HDR_VERSION; | |
257 | d2fc->hdr.count = count; | |
258 | memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved)); | |
259 | *data = d2fc; | |
260 | *data_free_ptr = d2fc; | |
261 | *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr); | |
57b28f66 MH |
262 | return 0; |
263 | } | |
264 | ||
2fcb3686 MH |
265 | static struct hypfs_dbfs_file dbfs_file_2fc = { |
266 | .name = "diag_2fc", | |
267 | .data_create = dbfs_diag2fc_create, | |
268 | .data_free = diag2fc_free, | |
57b28f66 MH |
269 | }; |
270 | ||
31cb4bd3 MH |
271 | int hypfs_vm_init(void) |
272 | { | |
57b28f66 MH |
273 | if (!MACHINE_IS_VM) |
274 | return 0; | |
31cb4bd3 MH |
275 | if (diag2fc(0, all_guests, NULL) > 0) |
276 | guest_query = all_guests; | |
277 | else if (diag2fc(0, local_guest, NULL) > 0) | |
278 | guest_query = local_guest; | |
279 | else | |
280 | return -EACCES; | |
2fcb3686 | 281 | return hypfs_dbfs_create_file(&dbfs_file_2fc); |
31cb4bd3 | 282 | } |
57b28f66 MH |
283 | |
284 | void hypfs_vm_exit(void) | |
285 | { | |
286 | if (!MACHINE_IS_VM) | |
287 | return; | |
2fcb3686 | 288 | hypfs_dbfs_remove_file(&dbfs_file_2fc); |
57b28f66 | 289 | } |