// SPDX-License-Identifier: GPL-2.0/* *  Copyright IBM Corp. 2001, 2009 *  Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>, *	       Martin Schwidefsky <schwidefsky@de.ibm.com>, */ #include <linux/cpufeature.h>#include <linux/debugfs.h>#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/export.h>#include <linux/slab.h>#include <asm/asm-extable.h>#include <asm/machine.h>#include <asm/ebcdic.h>#include <asm/debug.h>#include <asm/sysinfo.h>#include <asm/cpcmd.h>#include <asm/topology.h>#include <asm/fpu.h>#include <asm/asm.h> int topology_max_mnest; #ifdef CONFIG_PROC_FS static bool convert_ext_name(unsigned char encoding, char *name, size_t len){	switch (encoding) {	case 1: /* EBCDIC */		EBCASC(name, len);		break;	case 2:	/* UTF-8 */		break;	default:		return false;	}	return true;} static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info){	bool has_var_cap;	int i; 	if (stsi(info, 1, 1, 1))		return;	has_var_cap = !!info->model_var_cap[0];	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));	if (has_var_cap)		EBCASC(info->model_var_cap, sizeof(info->model_var_cap));	seq_printf(m, "Manufacturer:         %-16.16s\n", info->manufacturer);	seq_printf(m, "Type:                 %-4.4s\n", info->type);	if (info->lic)		seq_printf(m, "LIC Identifier:       %016lx\n", info->lic);	/*	 * 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')		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 (has_var_cap && info->model_var_cap_rating)		seq_printf(m, "Model Var. Capacity:  %-16.16s %08u\n",			   info->model_var_cap,			   info->model_var_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 (has_var_cap && info->nvr)		seq_printf(m, "Nominal Var. Rating:  %08u\n", info->nvr);	if (info->cai) {		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]);		}	}} static void stsi_15_1_x(struct seq_file *m, struct sysinfo_15_1_x *info){	int i; 	seq_putc(m, '\n');	if (!cpu_has_topology())		return;	if (stsi(info, 15, 1, topology_max_mnest))		return;	seq_printf(m, "CPU Topology HW:     ");	for (i = 0; i < TOPOLOGY_NR_MAG; i++)		seq_printf(m, " %d", info->mag[i]);	seq_putc(m, '\n');#ifdef CONFIG_SCHED_TOPOLOGY	store_topology(info);	seq_printf(m, "CPU Topology SW:     ");	for (i = 0; i < TOPOLOGY_NR_MAG; i++)		seq_printf(m, " %d", info->mag[i]);	seq_putc(m, '\n');#endif} 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))		return;	ext = (struct sysinfo_1_2_2_extension *)		((unsigned long) info + info->acc_offset);	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);	if (info->mt_installed) {		seq_printf(m, "CPUs G-MTID:          %d\n", info->mt_gtid);		seq_printf(m, "CPUs S-MTID:          %d\n", info->mt_stid);	}	/*	 * 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');	}} static void stsi_2_2_2(struct seq_file *m, struct sysinfo_2_2_2 *info){	if (stsi(info, 2, 2, 2))		return;	EBCASC(info->name, sizeof(info->name));	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)		seq_printf(m, "Dedicated ");	if (info->characteristics & LPAR_CHAR_SHARED)		seq_printf(m, "Shared ");	if (info->characteristics & LPAR_CHAR_LIMITED)		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);	if (info->mt_installed) {		seq_printf(m, "LPAR CPUs G-MTID:     %d\n", info->mt_gtid);		seq_printf(m, "LPAR CPUs S-MTID:     %d\n", info->mt_stid);		seq_printf(m, "LPAR CPUs PS-MTID:    %d\n", info->mt_psmtid);	}	if (convert_ext_name(info->vsne, info->ext_name, sizeof(info->ext_name))) {		seq_printf(m, "LPAR Extended Name:   %-.256s\n", info->ext_name);		seq_printf(m, "LPAR UUID:            %pUb\n", &info->uuid);	}} static void print_ext_name(struct seq_file *m, int lvl,			   struct sysinfo_3_2_2 *info){	size_t len = sizeof(info->ext_names[lvl]); 	if (!convert_ext_name(info->vm[lvl].evmne, info->ext_names[lvl], len))		return;	seq_printf(m, "VM%02d Extended Name:   %-.256s\n", lvl,		   info->ext_names[lvl]);} static void print_uuid(struct seq_file *m, int i, struct sysinfo_3_2_2 *info){	if (uuid_is_null(&info->vm[i].uuid))		return;	seq_printf(m, "VM%02d UUID:            %pUb\n", i, &info->vm[i].uuid);} static void stsi_3_2_2(struct seq_file *m, struct sysinfo_3_2_2 *info){	int i; 	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));		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);		print_ext_name(m, i, info);		print_uuid(m, i, info);	}} static int sysinfo_show(struct seq_file *m, void *v){	void *info = (void *)get_zeroed_page(GFP_KERNEL);	int level; 	if (!info)		return 0;	level = stsi(NULL, 0, 0, 0);	if (level >= 1)		stsi_1_1_1(m, info);	if (level >= 1)		stsi_15_1_x(m, info);	if (level >= 1)		stsi_1_2_2(m, info);	if (level >= 2)		stsi_2_2_2(m, info);	if (level >= 3)		stsi_3_2_2(m, info);	free_page((unsigned long)info);	return 0;} static int __init sysinfo_create_proc(void){	proc_create_single("sysinfo", 0444, NULL, sysinfo_show);	return 0;}device_initcall(sysinfo_create_proc); #endif /* CONFIG_PROC_FS */ /* * 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)__acquires_shared(service_level_sem){	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)__releases_shared(service_level_sem){	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 void service_level_vm_print(struct seq_file *m,				   struct service_level *slr){	char *query_buffer, *str; 	query_buffer = kmalloc(1024, GFP_KERNEL);	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_seq("service_levels", 0, NULL, &service_level_seq_ops);	if (machine_is_vm())		register_service_level(&service_level_vm);	return 0;}subsys_initcall(create_proc_service_level); /* * CPU capability might have changed. Therefore recalculate loops_per_jiffy. */void s390_adjust_jiffies(void){	DECLARE_KERNEL_FPU_ONSTACK16(fpu);	struct sysinfo_1_2_2 *info;	unsigned long capability; 	info = (void *) get_zeroed_page(GFP_KERNEL);	if (!info)		return; 	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		 * 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 ..		 */		kernel_fpu_begin(&fpu, KERNEL_FPR);		fpu_sfpc(0);		if (info->capability & 0xff800000)			fpu_ldgr(2, info->capability);		else			fpu_cefbr(2, info->capability);		fpu_cefbr(0, 10000000);		fpu_debr(0, 2);		capability = fpu_cgebr(0, 5);		kernel_fpu_end(&fpu, KERNEL_FPR);	} 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 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);} #ifdef CONFIG_DEBUG_FS #define STSI_FILE(fc, s1, s2)						       \static int stsi_open_##fc##_##s1##_##s2(struct inode *inode, struct file *file)\{									       \	file->private_data = (void *) get_zeroed_page(GFP_KERNEL);	       \	if (!file->private_data)					       \		return -ENOMEM;						       \	if (stsi(file->private_data, fc, s1, s2)) {			       \		free_page((unsigned long)file->private_data);		       \		file->private_data = NULL;				       \		return -EACCES;						       \	}								       \	return nonseekable_open(inode, file);				       \}									       \									       \static const struct file_operations stsi_##fc##_##s1##_##s2##_fs_ops = {       \	.open		= stsi_open_##fc##_##s1##_##s2,			       \	.release	= stsi_release,					       \	.read		= stsi_read,					       \}; static int stsi_release(struct inode *inode, struct file *file){	free_page((unsigned long)file->private_data);	return 0;} static ssize_t stsi_read(struct file *file, char __user *buf, size_t size, loff_t *ppos){	return simple_read_from_buffer(buf, size, ppos, file->private_data, PAGE_SIZE);} STSI_FILE( 1, 1, 1);STSI_FILE( 1, 2, 1);STSI_FILE( 1, 2, 2);STSI_FILE( 2, 2, 1);STSI_FILE( 2, 2, 2);STSI_FILE( 3, 2, 2);STSI_FILE(15, 1, 2);STSI_FILE(15, 1, 3);STSI_FILE(15, 1, 4);STSI_FILE(15, 1, 5);STSI_FILE(15, 1, 6); struct stsi_file {	const struct file_operations *fops;	char *name;}; static struct stsi_file stsi_file[] __initdata = {	{.fops = &stsi_1_1_1_fs_ops,  .name =  "1_1_1"},	{.fops = &stsi_1_2_1_fs_ops,  .name =  "1_2_1"},	{.fops = &stsi_1_2_2_fs_ops,  .name =  "1_2_2"},

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