Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 | /*
* Hypervisor filesystem for Linux on s390. z/VM implementation.
*
* Copyright IBM Corp. 2006
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <asm/ebcdic.h>
#include <asm/timex.h>
#include "hypfs.h"
#define NAME_LEN 8
#define DBFS_D2FC_HDR_VERSION 0
static char local_guest[] = " ";
static char all_guests[] = "* ";
static char *guest_query;
struct diag2fc_data {
__u32 version;
__u32 flags;
__u64 used_cpu;
__u64 el_time;
__u64 mem_min_kb;
__u64 mem_max_kb;
__u64 mem_share_kb;
__u64 mem_used_kb;
__u32 pcpus;
__u32 lcpus;
__u32 vcpus;
__u32 ocpus;
__u32 cpu_max;
__u32 cpu_shares;
__u32 cpu_use_samp;
__u32 cpu_delay_samp;
__u32 page_wait_samp;
__u32 idle_samp;
__u32 other_samp;
__u32 total_samp;
char guest_name[NAME_LEN];
};
struct diag2fc_parm_list {
char userid[NAME_LEN];
char aci_grp[NAME_LEN];
__u64 addr;
__u32 size;
__u32 fmt;
};
static int diag2fc(int size, char* query, void *addr)
{
unsigned long residual_cnt;
unsigned long rc;
struct diag2fc_parm_list parm_list;
memcpy(parm_list.userid, query, NAME_LEN);
ASCEBC(parm_list.userid, NAME_LEN);
parm_list.addr = (unsigned long) addr ;
parm_list.size = size;
parm_list.fmt = 0x02;
memset(parm_list.aci_grp, 0x40, NAME_LEN);
rc = -1;
asm volatile(
" diag %0,%1,0x2fc\n"
"0:\n"
EX_TABLE(0b,0b)
: "=d" (residual_cnt), "+d" (rc) : "0" (&parm_list) : "memory");
if ((rc != 0 ) && (rc != -2))
return rc;
else
return -residual_cnt;
}
/*
* Allocate buffer for "query" and store diag 2fc at "offset"
*/
static void *diag2fc_store(char *query, unsigned int *count, int offset)
{
void *data;
int size;
do {
size = diag2fc(0, query, NULL);
if (size < 0)
return ERR_PTR(-EACCES);
data = vmalloc(size + offset);
if (!data)
return ERR_PTR(-ENOMEM);
if (diag2fc(size, query, data + offset) == 0)
break;
vfree(data);
} while (1);
*count = (size / sizeof(struct diag2fc_data));
return data;
}
static void diag2fc_free(const void *data)
{
vfree(data);
}
#define ATTRIBUTE(dir, name, member) \
do { \
void *rc; \
rc = hypfs_create_u64(dir, name, member); \
if (IS_ERR(rc)) \
return PTR_ERR(rc); \
} while(0)
static int hpyfs_vm_create_guest(struct dentry *systems_dir,
struct diag2fc_data *data)
{
char guest_name[NAME_LEN + 1] = {};
struct dentry *guest_dir, *cpus_dir, *samples_dir, *mem_dir;
int dedicated_flag, capped_value;
capped_value = (data->flags & 0x00000006) >> 1;
dedicated_flag = (data->flags & 0x00000008) >> 3;
/* guest dir */
memcpy(guest_name, data->guest_name, NAME_LEN);
EBCASC(guest_name, NAME_LEN);
strim(guest_name);
guest_dir = hypfs_mkdir(systems_dir, guest_name);
if (IS_ERR(guest_dir))
return PTR_ERR(guest_dir);
ATTRIBUTE(guest_dir, "onlinetime_us", data->el_time);
/* logical cpu information */
cpus_dir = hypfs_mkdir(guest_dir, "cpus");
if (IS_ERR(cpus_dir))
return PTR_ERR(cpus_dir);
ATTRIBUTE(cpus_dir, "cputime_us", data->used_cpu);
ATTRIBUTE(cpus_dir, "capped", capped_value);
ATTRIBUTE(cpus_dir, "dedicated", dedicated_flag);
ATTRIBUTE(cpus_dir, "count", data->vcpus);
/*
* Note: The "weight_min" attribute got the wrong name.
* The value represents the number of non-stopped (operating)
* CPUS.
*/
ATTRIBUTE(cpus_dir, "weight_min", data->ocpus);
ATTRIBUTE(cpus_dir, "weight_max", data->cpu_max);
ATTRIBUTE(cpus_dir, "weight_cur", data->cpu_shares);
/* memory information */
mem_dir = hypfs_mkdir(guest_dir, "mem");
if (IS_ERR(mem_dir))
return PTR_ERR(mem_dir);
ATTRIBUTE(mem_dir, "min_KiB", data->mem_min_kb);
ATTRIBUTE(mem_dir, "max_KiB", data->mem_max_kb);
ATTRIBUTE(mem_dir, "used_KiB", data->mem_used_kb);
ATTRIBUTE(mem_dir, "share_KiB", data->mem_share_kb);
/* samples */
samples_dir = hypfs_mkdir(guest_dir, "samples");
if (IS_ERR(samples_dir))
return PTR_ERR(samples_dir);
ATTRIBUTE(samples_dir, "cpu_using", data->cpu_use_samp);
ATTRIBUTE(samples_dir, "cpu_delay", data->cpu_delay_samp);
ATTRIBUTE(samples_dir, "mem_delay", data->page_wait_samp);
ATTRIBUTE(samples_dir, "idle", data->idle_samp);
ATTRIBUTE(samples_dir, "other", data->other_samp);
ATTRIBUTE(samples_dir, "total", data->total_samp);
return 0;
}
int hypfs_vm_create_files(struct dentry *root)
{
struct dentry *dir, *file;
struct diag2fc_data *data;
unsigned int count = 0;
int rc, i;
data = diag2fc_store(guest_query, &count, 0);
if (IS_ERR(data))
return PTR_ERR(data);
/* Hpervisor Info */
dir = hypfs_mkdir(root, "hyp");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
file = hypfs_create_str(dir, "type", "z/VM Hypervisor");
if (IS_ERR(file)) {
rc = PTR_ERR(file);
goto failed;
}
/* physical cpus */
dir = hypfs_mkdir(root, "cpus");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
file = hypfs_create_u64(dir, "count", data->lcpus);
if (IS_ERR(file)) {
rc = PTR_ERR(file);
goto failed;
}
/* guests */
dir = hypfs_mkdir(root, "systems");
if (IS_ERR(dir)) {
rc = PTR_ERR(dir);
goto failed;
}
for (i = 0; i < count; i++) {
rc = hpyfs_vm_create_guest(dir, &(data[i]));
if (rc)
goto failed;
}
diag2fc_free(data);
return 0;
failed:
diag2fc_free(data);
return rc;
}
struct dbfs_d2fc_hdr {
u64 len; /* Length of d2fc buffer without header */
u16 version; /* Version of header */
char tod_ext[STORE_CLOCK_EXT_SIZE]; /* TOD clock for d2fc */
u64 count; /* Number of VM guests in d2fc buffer */
char reserved[30];
} __attribute__ ((packed));
struct dbfs_d2fc {
struct dbfs_d2fc_hdr hdr; /* 64 byte header */
char buf[]; /* d2fc buffer */
} __attribute__ ((packed));
static int dbfs_diag2fc_create(void **data, void **data_free_ptr, size_t *size)
{
struct dbfs_d2fc *d2fc;
unsigned int count;
d2fc = diag2fc_store(guest_query, &count, sizeof(d2fc->hdr));
if (IS_ERR(d2fc))
return PTR_ERR(d2fc);
get_tod_clock_ext(d2fc->hdr.tod_ext);
d2fc->hdr.len = count * sizeof(struct diag2fc_data);
d2fc->hdr.version = DBFS_D2FC_HDR_VERSION;
d2fc->hdr.count = count;
memset(&d2fc->hdr.reserved, 0, sizeof(d2fc->hdr.reserved));
*data = d2fc;
*data_free_ptr = d2fc;
*size = d2fc->hdr.len + sizeof(struct dbfs_d2fc_hdr);
return 0;
}
static struct hypfs_dbfs_file dbfs_file_2fc = {
.name = "diag_2fc",
.data_create = dbfs_diag2fc_create,
.data_free = diag2fc_free,
};
int hypfs_vm_init(void)
{
if (!MACHINE_IS_VM)
return 0;
if (diag2fc(0, all_guests, NULL) > 0)
guest_query = all_guests;
else if (diag2fc(0, local_guest, NULL) > 0)
guest_query = local_guest;
else
return -EACCES;
return hypfs_dbfs_create_file(&dbfs_file_2fc);
}
void hypfs_vm_exit(void)
{
if (!MACHINE_IS_VM)
return;
hypfs_dbfs_remove_file(&dbfs_file_2fc);
}
|