/* *  Copyright IBM Corp. 2008 *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) */ #define KMSG_COMPONENT "cpu"#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/kernel.h>#include <linux/init.h>#include <linux/smp.h>#include <linux/seq_file.h>#include <linux/delay.h>#include <linux/cpu.h>#include <asm/elf.h>#include <asm/lowcore.h>#include <asm/param.h> static DEFINE_PER_CPU(struct cpuid, cpu_id); /* * cpu_init - initializes state that is per-CPU. */void cpu_init(void){	struct s390_idle_data *idle = &__get_cpu_var(s390_idle);	struct cpuid *id = &__get_cpu_var(cpu_id); 	get_cpu_id(id);	atomic_inc(&init_mm.mm_count);	current->active_mm = &init_mm;	BUG_ON(current->mm);	enter_lazy_tlb(&init_mm, current);	memset(idle, 0, sizeof(*idle));} /* * show_cpuinfo - Get information on one CPU for use by procfs. */static int show_cpuinfo(struct seq_file *m, void *v){	static const char *hwcap_str[] = {		"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",		"edat", "etf3eh", "highgprs", "te"	};	unsigned long n = (unsigned long) v - 1;	int i; 	if (!n) {		s390_adjust_jiffies();		seq_printf(m, "vendor_id       : IBM/S390\n"			   "# processors    : %i\n"			   "bogomips per cpu: %lu.%02lu\n",			   num_online_cpus(), loops_per_jiffy/(500000/HZ),			   (loops_per_jiffy/(5000/HZ))%100);		seq_puts(m, "features\t: ");		for (i = 0; i < ARRAY_SIZE(hwcap_str); i++)			if (hwcap_str[i] && (elf_hwcap & (1UL << i)))				seq_printf(m, "%s ", hwcap_str[i]);		seq_puts(m, "\n");		show_cacheinfo(m);	}	get_online_cpus();	if (cpu_online(n)) {		struct cpuid *id = &per_cpu(cpu_id, n);		seq_printf(m, "processor %li: "			   "version = %02X,  "			   "identification = %06X,  "			   "machine = %04X\n",			   n, id->version, id->ident, id->machine);	}	put_online_cpus();	return 0;} static void *c_start(struct seq_file *m, loff_t *pos){	return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;} static void *c_next(struct seq_file *m, void *v, loff_t *pos){	++*pos;	return c_start(m, pos);} static void c_stop(struct seq_file *m, void *v){} const struct seq_operations cpuinfo_op = {	.start	= c_start,	.next	= c_next,	.stop	= c_stop,	.show	= show_cpuinfo,};