x86/kernel/microcode_core.c

32  *		Made to use devfs (/dev/cpu/microcode) + cleanups.
82 #include <linux/cpu.h>
100  * All non cpu-hotplug-callback call sites use:
104  *   the cpu-hotplug-callback call sites.
106  * We guarantee that only a single cpu is being
115  * Operations that are run on a target cpu:
131 static int collect_cpu_info_on_target(int cpu, struct cpu_signature *cpu_sig)
136 	ret = smp_call_function_single(cpu, collect_cpu_info_local, &ctx, 1);
143 static int collect_cpu_info(int cpu)
145 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
150 	ret = collect_cpu_info_on_target(cpu, &uci->cpu_sig);
168 static int apply_microcode_on_target(int cpu)
173 	ret = smp_call_function_single(cpu, apply_microcode_local, &ctx, 1);
184 	int cpu;
186 	for_each_online_cpu(cpu) {
187 		struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
193 		ustate = microcode_ops->request_microcode_user(cpu, buf, size);
198 			apply_microcode_on_target(cpu);
240 	.nodename		= "cpu/microcode",
263 MODULE_ALIAS("devname:cpu/microcode");
272 static int reload_for_cpu(int cpu)
274 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
281 		ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev);
283 			apply_microcode_on_target(cpu);
298 	int cpu = dev->id;
308 		if (cpu_online(cpu))
309 			ret = reload_for_cpu(cpu);
351 static void microcode_fini_cpu(int cpu)
353 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
355 	microcode_ops->microcode_fini_cpu(cpu);
359 static enum ucode_state microcode_resume_cpu(int cpu)
361 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
366 	pr_debug("CPU%d updated upon resume\n", cpu);
367 	apply_microcode_on_target(cpu);
372 static enum ucode_state microcode_init_cpu(int cpu)
376 	if (collect_cpu_info(cpu))
383 	ustate = microcode_ops->request_microcode_fw(cpu, &microcode_pdev->dev);
386 		pr_debug("CPU%d updated upon init\n", cpu);
387 		apply_microcode_on_target(cpu);
393 static enum ucode_state microcode_update_cpu(int cpu)
395 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
399 		ustate = microcode_resume_cpu(cpu);
401 		ustate = microcode_init_cpu(cpu);
408 	int err, cpu = sys_dev->id;
410 	if (!cpu_online(cpu))
413 	pr_debug("CPU%d added\n", cpu);
419 	if (microcode_init_cpu(cpu) == UCODE_ERROR)
427 	int cpu = sys_dev->id;
429 	if (!cpu_online(cpu))
432 	pr_debug("CPU%d removed\n", cpu);
433 	microcode_fini_cpu(cpu);
440 	int cpu = dev->id;
441 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
443 	if (!cpu_online(cpu))
453 	WARN_ON(cpu != 0);
456 		microcode_ops->apply_microcode(cpu);
470 	unsigned int cpu = (unsigned long)hcpu;
473 	sys_dev = get_cpu_sysdev(cpu);
477 		microcode_update_cpu(cpu);
480 		pr_debug("CPU%d added\n", cpu);
482 			pr_err("Failed to create group for CPU%d\n", cpu);
488 		pr_debug("CPU%d removed\n", cpu);
493 		microcode_fini_cpu(cpu);