[S390] move sysinfo.c from drivers/s390 to arch/s390/kernel
All in sysinfo.c is core kernel code and not driver code. So move it to arch/s390/kernel. Also includes some small cleanups. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
committed by
Martin Schwidefsky
Martin Schwidefsky
parent
fc19f381b3
commit
94f5b09d97
428
arch/s390/kernel/sysinfo.c
Normal file
428
arch/s390/kernel/sysinfo.c
Normal file
@ -0,0 +1,428 @@
|
||||
/*
|
||||
* Copyright IBM Corp. 2001, 2009
|
||||
* Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
|
||||
* Martin Schwidefsky <schwidefsky@de.ibm.com>,
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/module.h>
|
||||
#include <asm/ebcdic.h>
|
||||
#include <asm/sysinfo.h>
|
||||
#include <asm/cpcmd.h>
|
||||
|
||||
/* Sigh, math-emu. Don't ask. */
|
||||
#include <asm/sfp-util.h>
|
||||
#include <math-emu/soft-fp.h>
|
||||
#include <math-emu/single.h>
|
||||
|
||||
static inline int stsi_0(void)
|
||||
{
|
||||
int rc = stsi(NULL, 0, 0, 0);
|
||||
return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
|
||||
}
|
||||
|
||||
static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
|
||||
{
|
||||
if (stsi(info, 1, 1, 1) == -ENOSYS)
|
||||
return len;
|
||||
|
||||
EBCASC(info->manufacturer, sizeof(info->manufacturer));
|
||||
EBCASC(info->type, sizeof(info->type));
|
||||
EBCASC(info->model, sizeof(info->model));
|
||||
EBCASC(info->sequence, sizeof(info->sequence));
|
||||
EBCASC(info->plant, sizeof(info->plant));
|
||||
EBCASC(info->model_capacity, sizeof(info->model_capacity));
|
||||
EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
|
||||
EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
|
||||
len += sprintf(page + len, "Manufacturer: %-16.16s\n",
|
||||
info->manufacturer);
|
||||
len += sprintf(page + len, "Type: %-4.4s\n",
|
||||
info->type);
|
||||
if (info->model[0] != '\0')
|
||||
/*
|
||||
* Sigh: the model field has been renamed with System z9
|
||||
* to model_capacity and a new model field has been added
|
||||
* after the plant field. To avoid confusing older programs
|
||||
* the "Model:" prints "model_capacity model" or just
|
||||
* "model_capacity" if the model string is empty .
|
||||
*/
|
||||
len += sprintf(page + len,
|
||||
"Model: %-16.16s %-16.16s\n",
|
||||
info->model_capacity, info->model);
|
||||
else
|
||||
len += sprintf(page + len, "Model: %-16.16s\n",
|
||||
info->model_capacity);
|
||||
len += sprintf(page + len, "Sequence Code: %-16.16s\n",
|
||||
info->sequence);
|
||||
len += sprintf(page + len, "Plant: %-4.4s\n",
|
||||
info->plant);
|
||||
len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
|
||||
info->model_capacity, *(u32 *) info->model_cap_rating);
|
||||
if (info->model_perm_cap[0] != '\0')
|
||||
len += sprintf(page + len,
|
||||
"Model Perm. Capacity: %-16.16s %08u\n",
|
||||
info->model_perm_cap,
|
||||
*(u32 *) info->model_perm_cap_rating);
|
||||
if (info->model_temp_cap[0] != '\0')
|
||||
len += sprintf(page + len,
|
||||
"Model Temp. Capacity: %-16.16s %08u\n",
|
||||
info->model_temp_cap,
|
||||
*(u32 *) info->model_temp_cap_rating);
|
||||
return len;
|
||||
}
|
||||
|
||||
static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
|
||||
{
|
||||
struct sysinfo_1_2_2_extension *ext;
|
||||
int i;
|
||||
|
||||
if (stsi(info, 1, 2, 2) == -ENOSYS)
|
||||
return len;
|
||||
ext = (struct sysinfo_1_2_2_extension *)
|
||||
((unsigned long) info + info->acc_offset);
|
||||
|
||||
len += sprintf(page + len, "\n");
|
||||
len += sprintf(page + len, "CPUs Total: %d\n",
|
||||
info->cpus_total);
|
||||
len += sprintf(page + len, "CPUs Configured: %d\n",
|
||||
info->cpus_configured);
|
||||
len += sprintf(page + len, "CPUs Standby: %d\n",
|
||||
info->cpus_standby);
|
||||
len += sprintf(page + len, "CPUs Reserved: %d\n",
|
||||
info->cpus_reserved);
|
||||
|
||||
if (info->format == 1) {
|
||||
/*
|
||||
* Sigh 2. According to the specification the alternate
|
||||
* capability field is a 32 bit floating point number
|
||||
* if the higher order 8 bits are not zero. Printing
|
||||
* a floating point number in the kernel is a no-no,
|
||||
* always print the number as 32 bit unsigned integer.
|
||||
* The user-space needs to know about the strange
|
||||
* encoding of the alternate cpu capability.
|
||||
*/
|
||||
len += sprintf(page + len, "Capability: %u %u\n",
|
||||
info->capability, ext->alt_capability);
|
||||
for (i = 2; i <= info->cpus_total; i++)
|
||||
len += sprintf(page + len,
|
||||
"Adjustment %02d-way: %u %u\n",
|
||||
i, info->adjustment[i-2],
|
||||
ext->alt_adjustment[i-2]);
|
||||
|
||||
} else {
|
||||
len += sprintf(page + len, "Capability: %u\n",
|
||||
info->capability);
|
||||
for (i = 2; i <= info->cpus_total; i++)
|
||||
len += sprintf(page + len,
|
||||
"Adjustment %02d-way: %u\n",
|
||||
i, info->adjustment[i-2]);
|
||||
}
|
||||
|
||||
if (info->secondary_capability != 0)
|
||||
len += sprintf(page + len, "Secondary Capability: %d\n",
|
||||
info->secondary_capability);
|
||||
return len;
|
||||
}
|
||||
|
||||
static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
|
||||
{
|
||||
if (stsi(info, 2, 2, 2) == -ENOSYS)
|
||||
return len;
|
||||
|
||||
EBCASC(info->name, sizeof(info->name));
|
||||
|
||||
len += sprintf(page + len, "\n");
|
||||
len += sprintf(page + len, "LPAR Number: %d\n",
|
||||
info->lpar_number);
|
||||
|
||||
len += sprintf(page + len, "LPAR Characteristics: ");
|
||||
if (info->characteristics & LPAR_CHAR_DEDICATED)
|
||||
len += sprintf(page + len, "Dedicated ");
|
||||
if (info->characteristics & LPAR_CHAR_SHARED)
|
||||
len += sprintf(page + len, "Shared ");
|
||||
if (info->characteristics & LPAR_CHAR_LIMITED)
|
||||
len += sprintf(page + len, "Limited ");
|
||||
len += sprintf(page + len, "\n");
|
||||
|
||||
len += sprintf(page + len, "LPAR Name: %-8.8s\n",
|
||||
info->name);
|
||||
|
||||
len += sprintf(page + len, "LPAR Adjustment: %d\n",
|
||||
info->caf);
|
||||
|
||||
len += sprintf(page + len, "LPAR CPUs Total: %d\n",
|
||||
info->cpus_total);
|
||||
len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
|
||||
info->cpus_configured);
|
||||
len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
|
||||
info->cpus_standby);
|
||||
len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
|
||||
info->cpus_reserved);
|
||||
len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
|
||||
info->cpus_dedicated);
|
||||
len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
|
||||
info->cpus_shared);
|
||||
return len;
|
||||
}
|
||||
|
||||
static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (stsi(info, 3, 2, 2) == -ENOSYS)
|
||||
return len;
|
||||
for (i = 0; i < info->count; i++) {
|
||||
EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
|
||||
EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
|
||||
len += sprintf(page + len, "\n");
|
||||
len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
|
||||
i, info->vm[i].name);
|
||||
len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
|
||||
i, info->vm[i].cpi);
|
||||
|
||||
len += sprintf(page + len, "VM%02d Adjustment: %d\n",
|
||||
i, info->vm[i].caf);
|
||||
|
||||
len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
|
||||
i, info->vm[i].cpus_total);
|
||||
len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
|
||||
i, info->vm[i].cpus_configured);
|
||||
len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
|
||||
i, info->vm[i].cpus_standby);
|
||||
len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
|
||||
i, info->vm[i].cpus_reserved);
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
static int proc_read_sysinfo(char *page, char **start,
|
||||
off_t off, int count,
|
||||
int *eof, void *data)
|
||||
{
|
||||
unsigned long info = get_zeroed_page(GFP_KERNEL);
|
||||
int level, len;
|
||||
|
||||
if (!info)
|
||||
return 0;
|
||||
|
||||
len = 0;
|
||||
level = stsi_0();
|
||||
if (level >= 1)
|
||||
len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
|
||||
|
||||
if (level >= 1)
|
||||
len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
|
||||
|
||||
if (level >= 2)
|
||||
len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
|
||||
|
||||
if (level >= 3)
|
||||
len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
|
||||
|
||||
free_page(info);
|
||||
return len;
|
||||
}
|
||||
|
||||
static __init int create_proc_sysinfo(void)
|
||||
{
|
||||
create_proc_read_entry("sysinfo", 0444, NULL,
|
||||
proc_read_sysinfo, NULL);
|
||||
return 0;
|
||||
}
|
||||
device_initcall(create_proc_sysinfo);
|
||||
|
||||
/*
|
||||
* Service levels interface.
|
||||
*/
|
||||
|
||||
static DECLARE_RWSEM(service_level_sem);
|
||||
static LIST_HEAD(service_level_list);
|
||||
|
||||
int register_service_level(struct service_level *slr)
|
||||
{
|
||||
struct service_level *ptr;
|
||||
|
||||
down_write(&service_level_sem);
|
||||
list_for_each_entry(ptr, &service_level_list, list)
|
||||
if (ptr == slr) {
|
||||
up_write(&service_level_sem);
|
||||
return -EEXIST;
|
||||
}
|
||||
list_add_tail(&slr->list, &service_level_list);
|
||||
up_write(&service_level_sem);
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(register_service_level);
|
||||
|
||||
int unregister_service_level(struct service_level *slr)
|
||||
{
|
||||
struct service_level *ptr, *next;
|
||||
int rc = -ENOENT;
|
||||
|
||||
down_write(&service_level_sem);
|
||||
list_for_each_entry_safe(ptr, next, &service_level_list, list) {
|
||||
if (ptr != slr)
|
||||
continue;
|
||||
list_del(&ptr->list);
|
||||
rc = 0;
|
||||
break;
|
||||
}
|
||||
up_write(&service_level_sem);
|
||||
return rc;
|
||||
}
|
||||
EXPORT_SYMBOL(unregister_service_level);
|
||||
|
||||
static void *service_level_start(struct seq_file *m, loff_t *pos)
|
||||
{
|
||||
down_read(&service_level_sem);
|
||||
return seq_list_start(&service_level_list, *pos);
|
||||
}
|
||||
|
||||
static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
|
||||
{
|
||||
return seq_list_next(p, &service_level_list, pos);
|
||||
}
|
||||
|
||||
static void service_level_stop(struct seq_file *m, void *p)
|
||||
{
|
||||
up_read(&service_level_sem);
|
||||
}
|
||||
|
||||
static int service_level_show(struct seq_file *m, void *p)
|
||||
{
|
||||
struct service_level *slr;
|
||||
|
||||
slr = list_entry(p, struct service_level, list);
|
||||
slr->seq_print(m, slr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct seq_operations service_level_seq_ops = {
|
||||
.start = service_level_start,
|
||||
.next = service_level_next,
|
||||
.stop = service_level_stop,
|
||||
.show = service_level_show
|
||||
};
|
||||
|
||||
static int service_level_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return seq_open(file, &service_level_seq_ops);
|
||||
}
|
||||
|
||||
static const struct file_operations service_level_ops = {
|
||||
.open = service_level_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = seq_release
|
||||
};
|
||||
|
||||
static void service_level_vm_print(struct seq_file *m,
|
||||
struct service_level *slr)
|
||||
{
|
||||
char *query_buffer, *str;
|
||||
|
||||
query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
|
||||
if (!query_buffer)
|
||||
return;
|
||||
cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
|
||||
str = strchr(query_buffer, '\n');
|
||||
if (str)
|
||||
*str = 0;
|
||||
seq_printf(m, "VM: %s\n", query_buffer);
|
||||
kfree(query_buffer);
|
||||
}
|
||||
|
||||
static struct service_level service_level_vm = {
|
||||
.seq_print = service_level_vm_print
|
||||
};
|
||||
|
||||
static __init int create_proc_service_level(void)
|
||||
{
|
||||
proc_create("service_levels", 0, NULL, &service_level_ops);
|
||||
if (MACHINE_IS_VM)
|
||||
register_service_level(&service_level_vm);
|
||||
return 0;
|
||||
}
|
||||
subsys_initcall(create_proc_service_level);
|
||||
|
||||
/*
|
||||
* Bogomips calculation based on cpu capability.
|
||||
*/
|
||||
int get_cpu_capability(unsigned int *capability)
|
||||
{
|
||||
struct sysinfo_1_2_2 *info;
|
||||
int rc;
|
||||
|
||||
info = (void *) get_zeroed_page(GFP_KERNEL);
|
||||
if (!info)
|
||||
return -ENOMEM;
|
||||
rc = stsi(info, 1, 2, 2);
|
||||
if (rc == -ENOSYS)
|
||||
goto out;
|
||||
rc = 0;
|
||||
*capability = info->capability;
|
||||
out:
|
||||
free_page((unsigned long) info);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/*
|
||||
* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
|
||||
*/
|
||||
void s390_adjust_jiffies(void)
|
||||
{
|
||||
struct sysinfo_1_2_2 *info;
|
||||
const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
|
||||
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
|
||||
FP_DECL_EX;
|
||||
unsigned int capability;
|
||||
|
||||
info = (void *) get_zeroed_page(GFP_KERNEL);
|
||||
if (!info)
|
||||
return;
|
||||
|
||||
if (stsi(info, 1, 2, 2) != -ENOSYS) {
|
||||
/*
|
||||
* Major sigh. The cpu capability encoding is "special".
|
||||
* If the first 9 bits of info->capability are 0 then it
|
||||
* is a 32 bit unsigned integer in the range 0 .. 2^23.
|
||||
* If the first 9 bits are != 0 then it is a 32 bit float.
|
||||
* In addition a lower value indicates a proportionally
|
||||
* higher cpu capacity. Bogomips are the other way round.
|
||||
* To get to a halfway suitable number we divide 1e7
|
||||
* by the cpu capability number. Yes, that means a floating
|
||||
* point division .. math-emu here we come :-)
|
||||
*/
|
||||
FP_UNPACK_SP(SA, &fmil);
|
||||
if ((info->capability >> 23) == 0)
|
||||
FP_FROM_INT_S(SB, info->capability, 32, int);
|
||||
else
|
||||
FP_UNPACK_SP(SB, &info->capability);
|
||||
FP_DIV_S(SR, SA, SB);
|
||||
FP_TO_INT_S(capability, SR, 32, 0);
|
||||
} else
|
||||
/*
|
||||
* Really old machine without stsi block for basic
|
||||
* cpu information. Report 42.0 bogomips.
|
||||
*/
|
||||
capability = 42;
|
||||
loops_per_jiffy = capability * (500000/HZ);
|
||||
free_page((unsigned long) info);
|
||||
}
|
||||
|
||||
/*
|
||||
* calibrate the delay loop
|
||||
*/
|
||||
void __cpuinit calibrate_delay(void)
|
||||
{
|
||||
s390_adjust_jiffies();
|
||||
/* Print the good old Bogomips line .. */
|
||||
printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
|
||||
"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
|
||||
(loops_per_jiffy/(5000/HZ)) % 100);
|
||||
}
|
||||
Reference in New Issue
Block a user