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-rw-r--r--arch/s390/kernel/sysinfo.c351
1 files changed, 165 insertions, 186 deletions
diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index fa0eb238dac..62f89d98e88 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -22,17 +22,41 @@
#include <math-emu/soft-fp.h>
#include <math-emu/single.h>
-static inline int stsi_0(void)
+int topology_max_mnest;
+
+/*
+ * stsi - store system information
+ *
+ * Returns the current configuration level if function code 0 was specified.
+ * Otherwise returns 0 on success or a negative value on error.
+ */
+int stsi(void *sysinfo, int fc, int sel1, int sel2)
{
- int rc = stsi(NULL, 0, 0, 0);
- return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
+ register int r0 asm("0") = (fc << 28) | sel1;
+ register int r1 asm("1") = sel2;
+ int rc = 0;
+
+ asm volatile(
+ " stsi 0(%3)\n"
+ "0: jz 2f\n"
+ "1: lhi %1,%4\n"
+ "2:\n"
+ EX_TABLE(0b, 1b)
+ : "+d" (r0), "+d" (rc)
+ : "d" (r1), "a" (sysinfo), "K" (-EOPNOTSUPP)
+ : "cc", "memory");
+ if (rc)
+ return rc;
+ return fc ? 0 : ((unsigned int) r0) >> 28;
}
+EXPORT_SYMBOL(stsi);
-static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
+static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
{
- if (stsi(info, 1, 1, 1) == -ENOSYS)
- return len;
+ int i;
+ if (stsi(info, 1, 1, 1))
+ return;
EBCASC(info->manufacturer, sizeof(info->manufacturer));
EBCASC(info->type, sizeof(info->type));
EBCASC(info->model, sizeof(info->model));
@@ -41,242 +65,197 @@ static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
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);
+ seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
+ seq_printf(m, "Type: %-4.4s\n", info->type);
+ /*
+ * 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 .
+ */
+ seq_printf(m, "Model: %-16.16s", info->model_capacity);
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);
+ seq_printf(m, " %-16.16s", info->model);
+ seq_putc(m, '\n');
+ seq_printf(m, "Sequence Code: %-16.16s\n", info->sequence);
+ seq_printf(m, "Plant: %-4.4s\n", info->plant);
+ seq_printf(m, "Model Capacity: %-16.16s %08u\n",
+ info->model_capacity, info->model_cap_rating);
+ if (info->model_perm_cap_rating)
+ seq_printf(m, "Model Perm. Capacity: %-16.16s %08u\n",
+ info->model_perm_cap,
+ info->model_perm_cap_rating);
+ if (info->model_temp_cap_rating)
+ seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
+ info->model_temp_cap,
+ info->model_temp_cap_rating);
+ if (info->ncr)
+ seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
+ if (info->npr)
+ seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
+ if (info->ntr)
+ seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
if (info->cai) {
- len += sprintf(page + len,
- "Capacity Adj. Ind.: %d\n",
- info->cai);
- len += sprintf(page + len, "Capacity Ch. Reason: %d\n",
- info->ccr);
+ seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
+ seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
+ seq_printf(m, "Capacity Transient: %d\n", info->t);
+ }
+ if (info->p) {
+ for (i = 1; i <= ARRAY_SIZE(info->typepct); i++) {
+ seq_printf(m, "Type %d Percentage: %d\n",
+ i, info->typepct[i - 1]);
+ }
}
- return len;
}
-static int stsi_15_1_x(struct sysinfo_15_1_x *info, char *page, int len)
+static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info)
{
static int max_mnest;
int i, rc;
- len += sprintf(page + len, "\n");
+ seq_putc(m, '\n');
if (!MACHINE_HAS_TOPOLOGY)
- return len;
- if (max_mnest) {
- stsi(info, 15, 1, max_mnest);
- } else {
- for (max_mnest = 6; max_mnest > 1; max_mnest--) {
- rc = stsi(info, 15, 1, max_mnest);
- if (rc != -ENOSYS)
- break;
- }
- }
- len += sprintf(page + len, "CPU Topology HW: ");
+ return;
+ if (stsi(info, 15, 1, topology_max_mnest))
+ return;
+ seq_printf(m, "CPU Topology HW: ");
for (i = 0; i < TOPOLOGY_NR_MAG; i++)
- len += sprintf(page + len, " %d", info->mag[i]);
- len += sprintf(page + len, "\n");
+ seq_printf(m, " %d", info->mag[i]);
+ seq_putc(m, '\n');
#ifdef CONFIG_SCHED_MC
store_topology(info);
- len += sprintf(page + len, "CPU Topology SW: ");
+ seq_printf(m, "CPU Topology SW: ");
for (i = 0; i < TOPOLOGY_NR_MAG; i++)
- len += sprintf(page + len, " %d", info->mag[i]);
- len += sprintf(page + len, "\n");
+ seq_printf(m, " %d", info->mag[i]);
+ seq_putc(m, '\n');
#endif
- return len;
}
-static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
+static void stsi_1_2_2(struct seq_file *m, struct sysinfo_1_2_2 *info)
{
struct sysinfo_1_2_2_extension *ext;
int i;
- if (stsi(info, 1, 2, 2) == -ENOSYS)
- return len;
+ if (stsi(info, 1, 2, 2))
+ return;
ext = (struct sysinfo_1_2_2_extension *)
((unsigned long) info + info->acc_offset);
-
- 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]);
+ seq_printf(m, "CPUs Total: %d\n", info->cpus_total);
+ seq_printf(m, "CPUs Configured: %d\n", info->cpus_configured);
+ seq_printf(m, "CPUs Standby: %d\n", info->cpus_standby);
+ seq_printf(m, "CPUs Reserved: %d\n", info->cpus_reserved);
+ /*
+ * 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.
+ */
+ seq_printf(m, "Capability: %u", info->capability);
+ if (info->format == 1)
+ seq_printf(m, " %u", ext->alt_capability);
+ seq_putc(m, '\n');
+ if (info->nominal_cap)
+ seq_printf(m, "Nominal Capability: %d\n", info->nominal_cap);
+ if (info->secondary_cap)
+ seq_printf(m, "Secondary Capability: %d\n", info->secondary_cap);
+ for (i = 2; i <= info->cpus_total; i++) {
+ seq_printf(m, "Adjustment %02d-way: %u",
+ i, info->adjustment[i-2]);
+ if (info->format == 1)
+ seq_printf(m, " %u", ext->alt_adjustment[i-2]);
+ seq_putc(m, '\n');
}
-
- 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)
+static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info)
{
- if (stsi(info, 2, 2, 2) == -ENOSYS)
- return len;
-
+ if (stsi(info, 2, 2, 2))
+ return;
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: ");
+ seq_putc(m, '\n');
+ seq_printf(m, "LPAR Number: %d\n", info->lpar_number);
+ seq_printf(m, "LPAR Characteristics: ");
if (info->characteristics & LPAR_CHAR_DEDICATED)
- len += sprintf(page + len, "Dedicated ");
+ seq_printf(m, "Dedicated ");
if (info->characteristics & LPAR_CHAR_SHARED)
- len += sprintf(page + len, "Shared ");
+ seq_printf(m, "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;
+ seq_printf(m, "Limited ");
+ seq_putc(m, '\n');
+ seq_printf(m, "LPAR Name: %-8.8s\n", info->name);
+ seq_printf(m, "LPAR Adjustment: %d\n", info->caf);
+ seq_printf(m, "LPAR CPUs Total: %d\n", info->cpus_total);
+ seq_printf(m, "LPAR CPUs Configured: %d\n", info->cpus_configured);
+ seq_printf(m, "LPAR CPUs Standby: %d\n", info->cpus_standby);
+ seq_printf(m, "LPAR CPUs Reserved: %d\n", info->cpus_reserved);
+ seq_printf(m, "LPAR CPUs Dedicated: %d\n", info->cpus_dedicated);
+ seq_printf(m, "LPAR CPUs Shared: %d\n", info->cpus_shared);
}
-static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
+static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info)
{
int i;
- if (stsi(info, 3, 2, 2) == -ENOSYS)
- return len;
+ if (stsi(info, 3, 2, 2))
+ return;
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);
+ seq_putc(m, '\n');
+ seq_printf(m, "VM%02d Name: %-8.8s\n", i, info->vm[i].name);
+ seq_printf(m, "VM%02d Control Program: %-16.16s\n", i, info->vm[i].cpi);
+ seq_printf(m, "VM%02d Adjustment: %d\n", i, info->vm[i].caf);
+ seq_printf(m, "VM%02d CPUs Total: %d\n", i, info->vm[i].cpus_total);
+ seq_printf(m, "VM%02d CPUs Configured: %d\n", i, info->vm[i].cpus_configured);
+ seq_printf(m, "VM%02d CPUs Standby: %d\n", i, info->vm[i].cpus_standby);
+ seq_printf(m, "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)
+static int sysinfo_show(struct seq_file *m, void *v)
{
- unsigned long info = get_zeroed_page(GFP_KERNEL);
- int level, len;
+ void *info = (void *)get_zeroed_page(GFP_KERNEL);
+ int level;
if (!info)
return 0;
-
- len = 0;
- level = stsi_0();
+ level = stsi(NULL, 0, 0, 0);
if (level >= 1)
- len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
-
+ stsi_1_1_1(m, info);
if (level >= 1)
- len = stsi_15_1_x((struct sysinfo_15_1_x *) info, page, len);
-
+ stsi_15_1_x(m, info);
if (level >= 1)
- len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
-
+ stsi_1_2_2(m, info);
if (level >= 2)
- len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
-
+ stsi_2_2_2(m, info);
if (level >= 3)
- len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
+ stsi_3_2_2(m, info);
+ free_page((unsigned long)info);
+ return 0;
+}
- free_page(info);
- return len;
+static int sysinfo_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, sysinfo_show, NULL);
}
-static __init int create_proc_sysinfo(void)
+static const struct file_operations sysinfo_fops = {
+ .open = sysinfo_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init sysinfo_create_proc(void)
{
- create_proc_read_entry("sysinfo", 0444, NULL,
- proc_read_sysinfo, NULL);
+ proc_create("sysinfo", 0444, NULL, &sysinfo_fops);
return 0;
}
-device_initcall(create_proc_sysinfo);
+device_initcall(sysinfo_create_proc);
/*
* Service levels interface.
@@ -407,7 +386,7 @@ void s390_adjust_jiffies(void)
if (!info)
return;
- if (stsi(info, 1, 2, 2) != -ENOSYS) {
+ if (stsi(info, 1, 2, 2) == 0) {
/*
* Major sigh. The cpu capability encoding is "special".
* If the first 9 bits of info->capability are 0 then it