2 * Hypervisor filesystem for Linux on s390. z/VM implementation.
4 * Copyright IBM Corp. 2006
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 <asm/timex.h>
17 #define DBFS_D2FC_HDR_VERSION 0
19 static char local_guest[] = " ";
20 static char all_guests[] = "* ";
21 static char *guest_query;
44 char guest_name[NAME_LEN];
47 struct diag2fc_parm_list {
48 char userid[NAME_LEN];
49 char aci_grp[NAME_LEN];
55 static int diag2fc(int size, char* query, void *addr)
57 unsigned long residual_cnt;
59 struct diag2fc_parm_list parm_list;
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;
66 memset(parm_list.aci_grp, 0x40, NAME_LEN);
73 : "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory");
75 if ((rc != 0 ) && (rc != -2))
82 * Allocate buffer for "query" and store diag 2fc at "offset"
84 static void *diag2fc_store(char *query, unsigned int *count, int offset)
90 size = diag2fc(0, query, NULL);
92 return ERR_PTR(-EACCES);
93 data = vmalloc(size + offset);
95 return ERR_PTR(-ENOMEM);
96 if (diag2fc(size, query, data + offset) == 0)
100 *count = (size / sizeof(struct diag2fc_data));
105 static void diag2fc_free(const void *data)
110 #define ATTRIBUTE(dir, name, member) \
113 rc = hypfs_create_u64(dir, name, member); \
115 return PTR_ERR(rc); \
118 static int hpyfs_vm_create_guest(struct dentry *systems_dir,
119 struct diag2fc_data *data)
121 char guest_name[NAME_LEN + 1] = {};
122 struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir;
123 int dedicated_flag, capped_value;
125 capped_value = (data->flags & 0x00000006) >> 1;
126 dedicated_flag = (data->flags & 0x00000008) >> 3;
129 memcpy(guest_name, data->guest_name, NAME_LEN);
130 EBCASC(guest_name, NAME_LEN);
132 guest_dir = hypfs_mkdir(systems_dir, guest_name);
133 if (IS_ERR(guest_dir))
134 return PTR_ERR(guest_dir);
135 ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time);
137 /* logical cpu information */
138 cpus_dir = hypfs_mkdir(guest_dir, "cpus");
139 if (IS_ERR(cpus_dir))
140 return PTR_ERR(cpus_dir);
141 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);
146 * Note: The "weight_min" attribute got the wrong name.
147 * The value represents the number of non-stopped (operating)
150 ATTRIBUTE(cpus_dir, "weight_min", data->ocpus);
151 ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max);
152 ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares);
154 /* memory information */
155 mem_dir = hypfs_mkdir(guest_dir, "mem");
157 return PTR_ERR(mem_dir);
158 ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb);
159 ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb);
160 ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb);
161 ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb);
164 samples_dir = hypfs_mkdir(guest_dir, "samples");
165 if (IS_ERR(samples_dir))
166 return PTR_ERR(samples_dir);
167 ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp);
168 ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp);
169 ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp);
170 ATTRIBUTE(samples_dir, "idle", data->idle_samp);
171 ATTRIBUTE(samples_dir, "other", data->other_samp);
172 ATTRIBUTE(samples_dir, "total", data->total_samp);
176 int hypfs_vm_create_files(struct dentry *root)
178 struct dentry *dir, *file;
179 struct diag2fc_data *data;
180 unsigned int count = 0;
183 data = diag2fc_store(guest_query, &count, 0);
185 return PTR_ERR(data);
188 dir = hypfs_mkdir(root, "hyp");
193 file = hypfs_create_str(dir, "type", "z/VM Hypervisor");
200 dir = hypfs_mkdir(root, "cpus");
205 file = hypfs_create_u64(dir, "count", data->lcpus);
212 dir = hypfs_mkdir(root, "systems");
218 for (i = 0; i < count; i++) {
219 rc = hpyfs_vm_create_guest(dir, &(data[i]));
231 struct dbfs_d2fc_hdr {
232 u64 len; /* Length of d2fc buffer without header */
233 u16 version; /* Version of header */
234 char tod_ext[16]; /* TOD clock for d2fc */
235 u64 count; /* Number of VM guests in d2fc buffer */
237 } __attribute__ ((packed));
240 struct dbfs_d2fc_hdr hdr; /* 64 byte header */
241 char buf[]; /* d2fc buffer */
242 } __attribute__ ((packed));
244 static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
246 struct dbfs_d2fc *d2fc;
249 d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
251 return PTR_ERR(d2fc);
252 get_tod_clock_ext(d2fc->hdr.tod_ext);
253 d2fc->hdr.len = count * sizeof(struct diag2fc_data);
254 d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
255 d2fc->hdr.count = count;
256 memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved));
258 *data_free_ptr = d2fc;
259 *size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr);
263 static struct hypfs_dbfs_file dbfs_file_2fc = {
265 .data_create = dbfs_diag2fc_create,
266 .data_free = diag2fc_free,
269 int hypfs_vm_init(void)
273 if (diag2fc(0, all_guests, NULL) > 0)
274 guest_query = all_guests;
275 else if (diag2fc(0, local_guest, NULL) > 0)
276 guest_query = local_guest;
279 return hypfs_dbfs_create_file(&dbfs_file_2fc);
282 void hypfs_vm_exit(void)
286 hypfs_dbfs_remove_file(&dbfs_file_2fc);