C++ (Cpp) smp_get_save_areaの例

コード例 #1

static void __init smp_detect_cpus(void)
{
	unsigned int cpu, c_cpus, s_cpus;
	struct sclp_cpu_info *info;
	u16 boot_cpu_addr, cpu_addr;

	c_cpus = 1;
	s_cpus = 0;
	boot_cpu_addr = __cpu_logical_map[0];
	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		panic("smp_detect_cpus failed to allocate memory\n");
	/* Use sigp detection algorithm if sclp doesn't work. */
	if (sclp_get_cpu_info(info)) {
		smp_use_sigp_detection = 1;
		for (cpu = 0; cpu <= MAX_CPU_ADDRESS; cpu++) {
			if (cpu == boot_cpu_addr)
				continue;
			if (!raw_cpu_stopped(cpu))
				continue;
			smp_get_save_area(c_cpus, cpu);
			c_cpus++;
		}
		goto out;
	}

	if (info->has_cpu_type) {
		for (cpu = 0; cpu < info->combined; cpu++) {
			if (info->cpu[cpu].address == boot_cpu_addr) {
				smp_cpu_type = info->cpu[cpu].type;
				break;
			}
		}
	}

	for (cpu = 0; cpu < info->combined; cpu++) {
		if (info->has_cpu_type && info->cpu[cpu].type != smp_cpu_type)
			continue;
		cpu_addr = info->cpu[cpu].address;
		if (cpu_addr == boot_cpu_addr)
			continue;
		if (!raw_cpu_stopped(cpu_addr)) {
			s_cpus++;
			continue;
		}
		smp_get_save_area(c_cpus, cpu_addr);
		c_cpus++;
	}
out:
	kfree(info);
	pr_info("%d configured CPUs, %d standby CPUs\n", c_cpus, s_cpus);
	get_online_cpus();
	__smp_rescan_cpus();
	put_online_cpus();
}

コード例 #2

ファイル: smp.c プロジェクト: 71eh/open80211s

static void __init smp_detect_cpus(void)
{
	unsigned int cpu, c_cpus, s_cpus;
	struct sclp_cpu_info *info;
	u16 boot_cpu_addr, cpu_addr;

	c_cpus = 1;
	s_cpus = 0;
	boot_cpu_addr = __cpu_logical_map[0];
	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (!info)
		panic("smp_detect_cpus failed to allocate memory\n");
#ifdef CONFIG_CRASH_DUMP
	if (OLDMEM_BASE && !is_kdump_kernel()) {
		struct save_area *save_area;

		save_area = kmalloc(sizeof(*save_area), GFP_KERNEL);
		if (!save_area)
			panic("could not allocate memory for save area\n");
		copy_oldmem_page(1, (void *) save_area, sizeof(*save_area),
				 0x200, 0);
		zfcpdump_save_areas[0] = save_area;
	}
#endif
	/* Use sigp detection algorithm if sclp doesn't work. */
	if (sclp_get_cpu_info(info)) {
		smp_use_sigp_detection = 1;
		for (cpu = 0; cpu <= MAX_CPU_ADDRESS; cpu++) {
			if (cpu == boot_cpu_addr)
				continue;
			if (!raw_cpu_stopped(cpu))
				continue;
			smp_get_save_area(c_cpus, cpu);
			c_cpus++;
		}
		goto out;
	}

	if (info->has_cpu_type) {
		for (cpu = 0; cpu < info->combined; cpu++) {
			if (info->cpu[cpu].address == boot_cpu_addr) {
				smp_cpu_type = info->cpu[cpu].type;
				break;
			}
		}
	}

	for (cpu = 0; cpu < info->combined; cpu++) {
		if (info->has_cpu_type && info->cpu[cpu].type != smp_cpu_type)
			continue;
		cpu_addr = info->cpu[cpu].address;
		if (cpu_addr == boot_cpu_addr)
			continue;
		if (!raw_cpu_stopped(cpu_addr)) {
			s_cpus++;
			continue;
		}
		smp_get_save_area(c_cpus, cpu_addr);
		c_cpus++;
	}
out:
	kfree(info);
	pr_info("%d configured CPUs, %d standby CPUs\n", c_cpus, s_cpus);
	get_online_cpus();
	__smp_rescan_cpus();
	put_online_cpus();
}