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drivers/s390/sysinfo.c uses the store system information intruction to query the system about information of the machine, the LPAR and additional hypervisors. KVM has to implement the host part for this instruction. To avoid code duplication, this patch splits the common definitions from sysinfo.c into a separate header file include/asm-s390/sysinfo.h for KVM use. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
335 lines
9.8 KiB
C
335 lines
9.8 KiB
C
/*
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* drivers/s390/sysinfo.c
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*
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* Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com)
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/proc_fs.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <asm/ebcdic.h>
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#include <asm/sysinfo.h>
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/* Sigh, math-emu. Don't ask. */
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#include <asm/sfp-util.h>
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#include <math-emu/soft-fp.h>
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#include <math-emu/single.h>
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static inline int stsi_0(void)
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{
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int rc = stsi (NULL, 0, 0, 0);
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return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
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}
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static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
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{
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if (stsi(info, 1, 1, 1) == -ENOSYS)
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return len;
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EBCASC(info->manufacturer, sizeof(info->manufacturer));
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EBCASC(info->type, sizeof(info->type));
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EBCASC(info->model, sizeof(info->model));
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EBCASC(info->sequence, sizeof(info->sequence));
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EBCASC(info->plant, sizeof(info->plant));
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EBCASC(info->model_capacity, sizeof(info->model_capacity));
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len += sprintf(page + len, "Manufacturer: %-16.16s\n",
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info->manufacturer);
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len += sprintf(page + len, "Type: %-4.4s\n",
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info->type);
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if (info->model[0] != '\0')
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/*
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* Sigh: the model field has been renamed with System z9
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* to model_capacity and a new model field has been added
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* after the plant field. To avoid confusing older programs
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* the "Model:" prints "model_capacity model" or just
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* "model_capacity" if the model string is empty .
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*/
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len += sprintf(page + len,
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"Model: %-16.16s %-16.16s\n",
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info->model_capacity, info->model);
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else
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len += sprintf(page + len, "Model: %-16.16s\n",
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info->model_capacity);
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len += sprintf(page + len, "Sequence Code: %-16.16s\n",
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info->sequence);
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len += sprintf(page + len, "Plant: %-4.4s\n",
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info->plant);
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len += sprintf(page + len, "Model Capacity: %-16.16s\n",
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info->model_capacity);
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return len;
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}
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#if 0 /* Currently unused */
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static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len)
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{
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if (stsi(info, 1, 2, 1) == -ENOSYS)
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return len;
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len += sprintf(page + len, "\n");
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EBCASC(info->sequence, sizeof(info->sequence));
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EBCASC(info->plant, sizeof(info->plant));
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len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n",
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info->sequence);
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len += sprintf(page + len, "Plant of CPU: %-16.16s\n",
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info->plant);
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return len;
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}
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#endif
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static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
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{
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struct sysinfo_1_2_2_extension *ext;
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int i;
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if (stsi(info, 1, 2, 2) == -ENOSYS)
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return len;
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ext = (struct sysinfo_1_2_2_extension *)
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((unsigned long) info + info->acc_offset);
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "CPUs Total: %d\n",
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info->cpus_total);
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len += sprintf(page + len, "CPUs Configured: %d\n",
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info->cpus_configured);
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len += sprintf(page + len, "CPUs Standby: %d\n",
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info->cpus_standby);
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len += sprintf(page + len, "CPUs Reserved: %d\n",
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info->cpus_reserved);
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if (info->format == 1) {
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/*
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* Sigh 2. According to the specification the alternate
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* capability field is a 32 bit floating point number
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* if the higher order 8 bits are not zero. Printing
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* a floating point number in the kernel is a no-no,
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* always print the number as 32 bit unsigned integer.
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* The user-space needs to know about the strange
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* encoding of the alternate cpu capability.
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*/
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len += sprintf(page + len, "Capability: %u %u\n",
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info->capability, ext->alt_capability);
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for (i = 2; i <= info->cpus_total; i++)
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len += sprintf(page + len,
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"Adjustment %02d-way: %u %u\n",
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i, info->adjustment[i-2],
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ext->alt_adjustment[i-2]);
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} else {
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len += sprintf(page + len, "Capability: %u\n",
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info->capability);
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for (i = 2; i <= info->cpus_total; i++)
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len += sprintf(page + len,
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"Adjustment %02d-way: %u\n",
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i, info->adjustment[i-2]);
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}
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if (info->secondary_capability != 0)
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len += sprintf(page + len, "Secondary Capability: %d\n",
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info->secondary_capability);
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return len;
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}
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#if 0 /* Currently unused */
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static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len)
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{
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if (stsi(info, 2, 2, 1) == -ENOSYS)
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return len;
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len += sprintf(page + len, "\n");
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EBCASC (info->sequence, sizeof(info->sequence));
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EBCASC (info->plant, sizeof(info->plant));
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len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n",
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info->sequence);
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len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n",
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info->plant);
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return len;
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}
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#endif
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static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
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{
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if (stsi(info, 2, 2, 2) == -ENOSYS)
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return len;
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EBCASC (info->name, sizeof(info->name));
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "LPAR Number: %d\n",
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info->lpar_number);
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len += sprintf(page + len, "LPAR Characteristics: ");
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if (info->characteristics & LPAR_CHAR_DEDICATED)
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len += sprintf(page + len, "Dedicated ");
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if (info->characteristics & LPAR_CHAR_SHARED)
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len += sprintf(page + len, "Shared ");
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if (info->characteristics & LPAR_CHAR_LIMITED)
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len += sprintf(page + len, "Limited ");
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "LPAR Name: %-8.8s\n",
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info->name);
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len += sprintf(page + len, "LPAR Adjustment: %d\n",
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info->caf);
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len += sprintf(page + len, "LPAR CPUs Total: %d\n",
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info->cpus_total);
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len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
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info->cpus_configured);
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len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
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info->cpus_standby);
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len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
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info->cpus_reserved);
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len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
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info->cpus_dedicated);
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len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
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info->cpus_shared);
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return len;
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}
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static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
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{
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int i;
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if (stsi(info, 3, 2, 2) == -ENOSYS)
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return len;
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for (i = 0; i < info->count; i++) {
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EBCASC (info->vm[i].name, sizeof(info->vm[i].name));
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EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi));
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len += sprintf(page + len, "\n");
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len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
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i, info->vm[i].name);
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len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
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i, info->vm[i].cpi);
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len += sprintf(page + len, "VM%02d Adjustment: %d\n",
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i, info->vm[i].caf);
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len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
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i, info->vm[i].cpus_total);
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len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
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i, info->vm[i].cpus_configured);
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len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
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i, info->vm[i].cpus_standby);
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len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
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i, info->vm[i].cpus_reserved);
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}
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return len;
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}
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static int proc_read_sysinfo(char *page, char **start,
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off_t off, int count,
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int *eof, void *data)
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{
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unsigned long info = get_zeroed_page (GFP_KERNEL);
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int level, len;
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if (!info)
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return 0;
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len = 0;
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level = stsi_0();
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if (level >= 1)
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len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
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if (level >= 1)
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len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
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if (level >= 2)
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len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
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if (level >= 3)
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len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
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free_page (info);
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return len;
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}
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static __init int create_proc_sysinfo(void)
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{
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create_proc_read_entry("sysinfo", 0444, NULL,
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proc_read_sysinfo, NULL);
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return 0;
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}
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__initcall(create_proc_sysinfo);
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int get_cpu_capability(unsigned int *capability)
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{
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struct sysinfo_1_2_2 *info;
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int rc;
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info = (void *) get_zeroed_page(GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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rc = stsi(info, 1, 2, 2);
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if (rc == -ENOSYS)
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goto out;
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rc = 0;
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*capability = info->capability;
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out:
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free_page((unsigned long) info);
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return rc;
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}
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/*
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* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
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*/
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void s390_adjust_jiffies(void)
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{
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struct sysinfo_1_2_2 *info;
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const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
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FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
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FP_DECL_EX;
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unsigned int capability;
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info = (void *) get_zeroed_page(GFP_KERNEL);
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if (!info)
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return;
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if (stsi(info, 1, 2, 2) != -ENOSYS) {
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/*
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* Major sigh. The cpu capability encoding is "special".
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* If the first 9 bits of info->capability are 0 then it
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* is a 32 bit unsigned integer in the range 0 .. 2^23.
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* If the first 9 bits are != 0 then it is a 32 bit float.
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* In addition a lower value indicates a proportionally
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* higher cpu capacity. Bogomips are the other way round.
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* To get to a halfway suitable number we divide 1e7
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* by the cpu capability number. Yes, that means a floating
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* point division .. math-emu here we come :-)
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*/
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FP_UNPACK_SP(SA, &fmil);
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if ((info->capability >> 23) == 0)
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FP_FROM_INT_S(SB, info->capability, 32, int);
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else
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FP_UNPACK_SP(SB, &info->capability);
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FP_DIV_S(SR, SA, SB);
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FP_TO_INT_S(capability, SR, 32, 0);
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} else
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/*
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* Really old machine without stsi block for basic
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* cpu information. Report 42.0 bogomips.
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*/
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capability = 42;
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loops_per_jiffy = capability * (500000/HZ);
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free_page((unsigned long) info);
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}
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/*
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* calibrate the delay loop
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*/
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void __cpuinit calibrate_delay(void)
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{
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s390_adjust_jiffies();
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/* Print the good old Bogomips line .. */
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printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
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"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
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(loops_per_jiffy/(5000/HZ)) % 100);
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}
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