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26 results

jvmti_agent.c

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  • proc.c 4.69 KiB
    #include <linux/smp.h>
    #include <linux/timex.h>
    #include <linux/string.h>
    #include <asm/semaphore.h>
    #include <linux/seq_file.h>
    #include <linux/cpufreq.h>
    
    /*
     *	Get CPU information for use by the procfs.
     */
    #ifdef CONFIG_X86_32
    static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
    			      unsigned int cpu)
    {
    #ifdef CONFIG_X86_HT
    	if (c->x86_max_cores * smp_num_siblings > 1) {
    		seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
    		seq_printf(m, "siblings\t: %d\n",
    			   cpus_weight(per_cpu(cpu_core_map, cpu)));
    		seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
    		seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
    		seq_printf(m, "apicid\t\t: %d\n", c->apicid);
    		seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
    	}
    #endif
    }
    
    static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
    {
    	/*
    	 * We use exception 16 if we have hardware math and we've either seen
    	 * it or the CPU claims it is internal
    	 */
    	int fpu_exception = c->hard_math && (ignore_fpu_irq || cpu_has_fpu);
    	seq_printf(m,
    		   "fdiv_bug\t: %s\n"
    		   "hlt_bug\t\t: %s\n"
    		   "f00f_bug\t: %s\n"
    		   "coma_bug\t: %s\n"
    		   "fpu\t\t: %s\n"
    		   "fpu_exception\t: %s\n"
    		   "cpuid level\t: %d\n"
    		   "wp\t\t: %s\n",
    		   c->fdiv_bug ? "yes" : "no",
    		   c->hlt_works_ok ? "no" : "yes",
    		   c->f00f_bug ? "yes" : "no",
    		   c->coma_bug ? "yes" : "no",
    		   c->hard_math ? "yes" : "no",
    		   fpu_exception ? "yes" : "no",
    		   c->cpuid_level,
    		   c->wp_works_ok ? "yes" : "no");
    }
    #else
    static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
    			      unsigned int cpu)
    {
    #ifdef CONFIG_SMP
    	if (c->x86_max_cores * smp_num_siblings > 1) {
    		seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
    		seq_printf(m, "siblings\t: %d\n",
    			   cpus_weight(per_cpu(cpu_core_map, cpu)));
    		seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
    		seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
    		seq_printf(m, "apicid\t\t: %d\n", c->apicid);
    		seq_printf(m, "initial apicid\t: %d\n", c->initial_apicid);
    	}
    #endif
    }
    
    static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
    {
    	seq_printf(m,
    		   "fpu\t\t: yes\n"
    		   "fpu_exception\t: yes\n"
    		   "cpuid level\t: %d\n"
    		   "wp\t\t: yes\n",
    		   c->cpuid_level);
    }
    #endif
    
    static int show_cpuinfo(struct seq_file *m, void *v)
    {
    	struct cpuinfo_x86 *c = v;
    	unsigned int cpu = 0;
    	int i;
    
    #ifdef CONFIG_SMP
    	cpu = c->cpu_index;
    #endif
    	seq_printf(m, "processor\t: %u\n"
    		   "vendor_id\t: %s\n"
    		   "cpu family\t: %d\n"
    		   "model\t\t: %u\n"
    		   "model name\t: %s\n",
    		   cpu,
    		   c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
    		   c->x86,
    		   c->x86_model,
    		   c->x86_model_id[0] ? c->x86_model_id : "unknown");
    
    	if (c->x86_mask || c->cpuid_level >= 0)
    		seq_printf(m, "stepping\t: %d\n", c->x86_mask);
    	else
    		seq_printf(m, "stepping\t: unknown\n");
    
    	if (cpu_has(c, X86_FEATURE_TSC)) {
    		unsigned int freq = cpufreq_quick_get(cpu);
    
    		if (!freq)
    			freq = cpu_khz;
    		seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
    			   freq / 1000, (freq % 1000));
    	}
    
    	/* Cache size */
    	if (c->x86_cache_size >= 0)
    		seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
    
    	show_cpuinfo_core(m, c, cpu);
    	show_cpuinfo_misc(m, c);
    
    	seq_printf(m, "flags\t\t:");
    	for (i = 0; i < 32*NCAPINTS; i++)
    		if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
    			seq_printf(m, " %s", x86_cap_flags[i]);
    
    	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
    		   c->loops_per_jiffy/(500000/HZ),
    		   (c->loops_per_jiffy/(5000/HZ)) % 100);
    
    #ifdef CONFIG_X86_64
    	if (c->x86_tlbsize > 0)
    		seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
    #endif
    	seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size);
    #ifdef CONFIG_X86_64
    	seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
    	seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
    		   c->x86_phys_bits, c->x86_virt_bits);
    #endif
    
    	seq_printf(m, "power management:");
    	for (i = 0; i < 32; i++) {
    		if (c->x86_power & (1 << i)) {
    			if (i < ARRAY_SIZE(x86_power_flags) &&
    			    x86_power_flags[i])
    				seq_printf(m, "%s%s",
    					   x86_power_flags[i][0]?" ":"",
    					   x86_power_flags[i]);
    			else
    				seq_printf(m, " [%d]", i);
    		}
    	}
    
    	seq_printf(m, "\n\n");
    
    	return 0;
    }
    
    static void *c_start(struct seq_file *m, loff_t *pos)
    {
    	if (*pos == 0)	/* just in case, cpu 0 is not the first */
    		*pos = first_cpu(cpu_online_map);
    	if ((*pos) < NR_CPUS && cpu_online(*pos))
    		return &cpu_data(*pos);
    	return NULL;
    }
    
    static void *c_next(struct seq_file *m, void *v, loff_t *pos)
    {
    	*pos = next_cpu(*pos, cpu_online_map);
    	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,
    };