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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> | |
13 | #include "hypfs.h" | |
14 | ||
15 | #define NAME_LEN 8 | |
16 | ||
17 | static char local_guest[] = " "; | |
18 | static char all_guests[] = "* "; | |
19 | static char *guest_query; | |
20 | ||
21 | struct diag2fc_data { | |
22 | __u32 version; | |
23 | __u32 flags; | |
24 | __u64 used_cpu; | |
25 | __u64 el_time; | |
26 | __u64 mem_min_kb; | |
27 | __u64 mem_max_kb; | |
28 | __u64 mem_share_kb; | |
29 | __u64 mem_used_kb; | |
30 | __u32 pcpus; | |
31 | __u32 lcpus; | |
32 | __u32 vcpus; | |
33 | __u32 cpu_min; | |
34 | __u32 cpu_max; | |
35 | __u32 cpu_shares; | |
36 | __u32 cpu_use_samp; | |
37 | __u32 cpu_delay_samp; | |
38 | __u32 page_wait_samp; | |
39 | __u32 idle_samp; | |
40 | __u32 other_samp; | |
41 | __u32 total_samp; | |
42 | char guest_name[NAME_LEN]; | |
43 | }; | |
44 | ||
45 | struct diag2fc_parm_list { | |
46 | char userid[NAME_LEN]; | |
47 | char aci_grp[NAME_LEN]; | |
48 | __u64 addr; | |
49 | __u32 size; | |
50 | __u32 fmt; | |
51 | }; | |
52 | ||
53 | static int diag2fc(int size, char* query, void *addr) | |
54 | { | |
55 | unsigned long residual_cnt; | |
56 | unsigned long rc; | |
57 | struct diag2fc_parm_list parm_list; | |
58 | ||
59 | memcpy(parm_list.userid, query, NAME_LEN); | |
60 | ASCEBC(parm_list.userid, NAME_LEN); | |
61 | parm_list.addr = (unsigned long) addr ; | |
62 | parm_list.size = size; | |
63 | parm_list.fmt = 0x02; | |
64 | memset(parm_list.aci_grp, 0x40, NAME_LEN); | |
65 | rc = -1; | |
66 | ||
67 | asm volatile( | |
68 | " diag %0,%1,0x2fc\n" | |
69 | "0:\n" | |
70 | EX_TABLE(0b,0b) | |
71 | : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory"); | |
72 | ||
73 | if ((rc != 0 ) && (rc != -2)) | |
74 | return rc; | |
75 | else | |
76 | return -residual_cnt; | |
77 | } | |
78 | ||
79 | static struct diag2fc_data *diag2fc_store(char *query, int *count) | |
80 | { | |
81 | int size; | |
82 | struct diag2fc_data *data; | |
83 | ||
84 | do { | |
85 | size = diag2fc(0, query, NULL); | |
86 | if (size < 0) | |
87 | return ERR_PTR(-EACCES); | |
88 | data = vmalloc(size); | |
89 | if (!data) | |
90 | return ERR_PTR(-ENOMEM); | |
91 | if (diag2fc(size, query, data) == 0) | |
92 | break; | |
93 | vfree(data); | |
94 | } while (1); | |
95 | *count = (size / sizeof(*data)); | |
96 | ||
97 | return data; | |
98 | } | |
99 | ||
100 | static void diag2fc_free(void *data) | |
101 | { | |
102 | vfree(data); | |
103 | } | |
104 | ||
105 | #define ATTRIBUTE(sb, dir, name, member) \ | |
106 | do { \ | |
107 | void *rc; \ | |
108 | rc = hypfs_create_u64(sb, dir, name, member); \ | |
109 | if (IS_ERR(rc)) \ | |
110 | return PTR_ERR(rc); \ | |
111 | } while(0) | |
112 | ||
113 | static int hpyfs_vm_create_guest(struct super_block *sb, | |
114 | struct dentry *systems_dir, | |
115 | struct diag2fc_data *data) | |
116 | { | |
117 | char guest_name[NAME_LEN + 1] = {}; | |
118 | struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir; | |
119 | int dedicated_flag, capped_value; | |
120 | ||
121 | capped_value = (data->flags & 0x00000006) >> 1; | |
122 | dedicated_flag = (data->flags & 0x00000008) >> 3; | |
123 | ||
124 | /* guest dir */ | |
125 | memcpy(guest_name, data->guest_name, NAME_LEN); | |
126 | EBCASC(guest_name, NAME_LEN); | |
127 | strstrip(guest_name); | |
128 | guest_dir = hypfs_mkdir(sb, systems_dir, guest_name); | |
129 | if (IS_ERR(guest_dir)) | |
130 | return PTR_ERR(guest_dir); | |
131 | ATTRIBUTE(sb, guest_dir, "onlinetime_us", data->el_time); | |
132 | ||
133 | /* logical cpu information */ | |
134 | cpus_dir = hypfs_mkdir(sb, guest_dir, "cpus"); | |
135 | if (IS_ERR(cpus_dir)) | |
136 | return PTR_ERR(cpus_dir); | |
137 | ATTRIBUTE(sb, cpus_dir, "cputime_us", data->used_cpu); | |
138 | ATTRIBUTE(sb, cpus_dir, "capped", capped_value); | |
139 | ATTRIBUTE(sb, cpus_dir, "dedicated", dedicated_flag); | |
140 | ATTRIBUTE(sb, cpus_dir, "count", data->vcpus); | |
141 | ATTRIBUTE(sb, cpus_dir, "weight_min", data->cpu_min); | |
142 | ATTRIBUTE(sb, cpus_dir, "weight_max", data->cpu_max); | |
143 | ATTRIBUTE(sb, cpus_dir, "weight_cur", data->cpu_shares); | |
144 | ||
145 | /* memory information */ | |
146 | mem_dir = hypfs_mkdir(sb, guest_dir, "mem"); | |
147 | if (IS_ERR(mem_dir)) | |
148 | return PTR_ERR(mem_dir); | |
149 | ATTRIBUTE(sb, mem_dir, "min_KiB", data->mem_min_kb); | |
150 | ATTRIBUTE(sb, mem_dir, "max_KiB", data->mem_max_kb); | |
151 | ATTRIBUTE(sb, mem_dir, "used_KiB", data->mem_used_kb); | |
152 | ATTRIBUTE(sb, mem_dir, "share_KiB", data->mem_share_kb); | |
153 | ||
154 | /* samples */ | |
155 | samples_dir = hypfs_mkdir(sb, guest_dir, "samples"); | |
156 | if (IS_ERR(samples_dir)) | |
157 | return PTR_ERR(samples_dir); | |
158 | ATTRIBUTE(sb, samples_dir, "cpu_using", data->cpu_use_samp); | |
159 | ATTRIBUTE(sb, samples_dir, "cpu_delay", data->cpu_delay_samp); | |
160 | ATTRIBUTE(sb, samples_dir, "mem_delay", data->page_wait_samp); | |
161 | ATTRIBUTE(sb, samples_dir, "idle", data->idle_samp); | |
162 | ATTRIBUTE(sb, samples_dir, "other", data->other_samp); | |
163 | ATTRIBUTE(sb, samples_dir, "total", data->total_samp); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | int hypfs_vm_create_files(struct super_block *sb, struct dentry *root) | |
168 | { | |
169 | struct dentry *dir, *file; | |
170 | struct diag2fc_data *data; | |
171 | int rc, i, count = 0; | |
172 | ||
173 | data = diag2fc_store(guest_query, &count); | |
174 | if (IS_ERR(data)) | |
175 | return PTR_ERR(data); | |
176 | ||
177 | /* Hpervisor Info */ | |
178 | dir = hypfs_mkdir(sb, root, "hyp"); | |
179 | if (IS_ERR(dir)) { | |
180 | rc = PTR_ERR(dir); | |
181 | goto failed; | |
182 | } | |
183 | file = hypfs_create_str(sb, dir, "type", "z/VM Hypervisor"); | |
184 | if (IS_ERR(file)) { | |
185 | rc = PTR_ERR(file); | |
186 | goto failed; | |
187 | } | |
188 | ||
189 | /* physical cpus */ | |
190 | dir = hypfs_mkdir(sb, root, "cpus"); | |
191 | if (IS_ERR(dir)) { | |
192 | rc = PTR_ERR(dir); | |
193 | goto failed; | |
194 | } | |
195 | file = hypfs_create_u64(sb, dir, "count", data->lcpus); | |
196 | if (IS_ERR(file)) { | |
197 | rc = PTR_ERR(file); | |
198 | goto failed; | |
199 | } | |
200 | ||
201 | /* guests */ | |
202 | dir = hypfs_mkdir(sb, root, "systems"); | |
203 | if (IS_ERR(dir)) { | |
204 | rc = PTR_ERR(dir); | |
205 | goto failed; | |
206 | } | |
207 | ||
208 | for (i = 0; i < count; i++) { | |
209 | rc = hpyfs_vm_create_guest(sb, dir, &(data[i])); | |
210 | if (rc) | |
211 | goto failed; | |
212 | } | |
213 | diag2fc_free(data); | |
214 | return 0; | |
215 | ||
216 | failed: | |
217 | diag2fc_free(data); | |
218 | return rc; | |
219 | } | |
220 | ||
221 | int hypfs_vm_init(void) | |
222 | { | |
223 | if (diag2fc(0, all_guests, NULL) > 0) | |
224 | guest_query = all_guests; | |
225 | else if (diag2fc(0, local_guest, NULL) > 0) | |
226 | guest_query = local_guest; | |
227 | else | |
228 | return -EACCES; | |
229 | ||
230 | return 0; | |
231 | } |