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Commit 1070505d authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge branch 'x86/microcode' into perf/core 



Merge this branch because we want to rely on the newer (and saner)
microcode loading and checking facilities.

Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents b0338e99 3d8986bc

arch/x86/kernel/microcode_core.c

+43 −11
Original line number Diff line number Diff line
@@ -298,19 +298,27 @@ static ssize_t reload_store(struct device *dev, 
			    const char *buf, size_t size)

{

	unsigned long val;

	int cpu = dev->id;

	ssize_t ret = 0;

	int cpu;

	ssize_t ret = 0, tmp_ret;



	ret = kstrtoul(buf, 0, &val);

	if (ret)

		return ret;



	if (val == 1) {

	if (val != 1)

		return size;



	get_online_cpus();

		if (cpu_online(cpu))

			ret = reload_for_cpu(cpu);

		put_online_cpus();

	for_each_online_cpu(cpu) {

		tmp_ret = reload_for_cpu(cpu);

		if (tmp_ret != 0)

			pr_warn("Error reloading microcode on CPU %d\n", cpu);



		/* save retval of the first encountered reload error */

		if (!ret)

			ret = tmp_ret;

	}

	put_online_cpus();



	if (!ret)

		ret = size;
@@ -339,7 +347,6 @@ static DEVICE_ATTR(version, 0400, version_show, NULL); 
static DEVICE_ATTR(processor_flags, 0400, pf_show, NULL);



static struct attribute *mc_default_attrs[] = {

	&dev_attr_reload.attr,

	&dev_attr_version.attr,

	&dev_attr_processor_flags.attr,

	NULL
@@ -516,6 +523,16 @@ static const struct x86_cpu_id microcode_id[] = { 
MODULE_DEVICE_TABLE(x86cpu, microcode_id);

#endif



static struct attribute *cpu_root_microcode_attrs[] = {

	&dev_attr_reload.attr,

	NULL

};



static struct attribute_group cpu_root_microcode_group = {

	.name  = "microcode",

	.attrs = cpu_root_microcode_attrs,

};



static int __init microcode_init(void)

{

	struct cpuinfo_x86 *c = &cpu_data(0);
@@ -547,9 +564,17 @@ static int __init microcode_init(void) 
	if (error)

		goto out_pdev;



	error = sysfs_create_group(&cpu_subsys.dev_root->kobj,

				   &cpu_root_microcode_group);



	if (error) {

		pr_err("Error creating microcode group!\n");

		goto out_driver;

	}



	error = microcode_dev_init();

	if (error)

		goto out_driver;

		goto out_ucode_group;



	register_syscore_ops(&mc_syscore_ops);

	register_hotcpu_notifier(&mc_cpu_notifier);
@@ -559,6 +584,10 @@ static int __init microcode_init(void) 


	return 0;



 out_ucode_group:

	sysfs_remove_group(&cpu_subsys.dev_root->kobj,

			   &cpu_root_microcode_group);



 out_driver:

	get_online_cpus();

	mutex_lock(&microcode_mutex);
@@ -584,6 +613,9 @@ static void __exit microcode_exit(void) 
	unregister_hotcpu_notifier(&mc_cpu_notifier);

	unregister_syscore_ops(&mc_syscore_ops);



	sysfs_remove_group(&cpu_subsys.dev_root->kobj,

			   &cpu_root_microcode_group);



	get_online_cpus();

	mutex_lock(&microcode_mutex);