1 files changed, 85 insertions, 1 deletions

diff --git a/arch/tile/kernel/sysfs.c b/arch/tile/kernel/sysfs.c
index f862b005eb7..a3ed12f8f83 100644
--- a/arch/tile/kernel/sysfs.c
+++ b/arch/tile/kernel/sysfs.c
@@ -93,6 +93,10 @@ HV_CONF_ATTR(mezz_part,		HV_CONFSTR_MEZZ_PART_NUM)
 HV_CONF_ATTR(mezz_serial,	HV_CONFSTR_MEZZ_SERIAL_NUM)
 HV_CONF_ATTR(mezz_revision,	HV_CONFSTR_MEZZ_REV)
 HV_CONF_ATTR(mezz_description,	HV_CONFSTR_MEZZ_DESC)
+HV_CONF_ATTR(cpumod_part,	HV_CONFSTR_CPUMOD_PART_NUM)
+HV_CONF_ATTR(cpumod_serial,	HV_CONFSTR_CPUMOD_SERIAL_NUM)
+HV_CONF_ATTR(cpumod_revision,	HV_CONFSTR_CPUMOD_REV)
+HV_CONF_ATTR(cpumod_description,HV_CONFSTR_CPUMOD_DESC)
 HV_CONF_ATTR(switch_control,	HV_CONFSTR_SWITCH_CONTROL)
 
 static struct attribute *board_attrs[] = {
@@ -104,6 +108,10 @@ static struct attribute *board_attrs[] = {
 	&dev_attr_mezz_serial.attr,
 	&dev_attr_mezz_revision.attr,
 	&dev_attr_mezz_description.attr,
+	&dev_attr_cpumod_part.attr,
+	&dev_attr_cpumod_serial.attr,
+	&dev_attr_cpumod_revision.attr,
+	&dev_attr_cpumod_description.attr,
 	&dev_attr_switch_control.attr,
 	NULL
 };
@@ -149,6 +157,67 @@ hvconfig_bin_read(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
+static ssize_t hv_stats_show(struct device *dev,
+			     struct device_attribute *attr,
+			     char *page)
+{
+	int cpu = dev->id;
+	long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu));
+
+	ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS,
+			       (unsigned long)page, PAGE_SIZE - 1,
+			       lotar, 0);
+	n = n < 0 ? 0 : min(n, (ssize_t)PAGE_SIZE - 1);
+	page[n] = '\0';
+	return n;
+}
+
+static ssize_t hv_stats_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *page,
+			      size_t count)
+{
+	int cpu = dev->id;
+	long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu));
+
+	ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS, 0, 0, lotar, 1);
+	return n < 0 ? n : count;
+}
+
+static DEVICE_ATTR(hv_stats, 0644, hv_stats_show, hv_stats_store);
+
+static int hv_stats_device_add(struct device *dev, struct subsys_interface *sif)
+{
+	int err, cpu = dev->id;
+
+	if (!cpu_online(cpu))
+		return 0;
+
+	err = sysfs_create_file(&dev->kobj, &dev_attr_hv_stats.attr);
+
+	return err;
+}
+
+static int hv_stats_device_remove(struct device *dev,
+				  struct subsys_interface *sif)
+{
+	int cpu = dev->id;
+
+	if (!cpu_online(cpu))
+		return 0;
+
+	sysfs_remove_file(&dev->kobj, &dev_attr_hv_stats.attr);
+	return 0;
+}
+
+
+static struct subsys_interface hv_stats_interface = {
+	.name			= "hv_stats",
+	.subsys			= &cpu_subsys,
+	.add_dev		= hv_stats_device_add,
+	.remove_dev		= hv_stats_device_remove,
+};
+
 static int __init create_sysfs_entries(void)
 {
 	int err = 0;
@@ -163,7 +232,7 @@ static int __init create_sysfs_entries(void)
 
 #define create_hv_attr(name)						\
 	if (!err)							\
-		err = sysfs_create_file(hypervisor_kobj, &dev_attr_##name);
+		err = sysfs_create_file(hypervisor_kobj, &dev_attr_##name.attr);
 	create_hv_attr(type);
 	create_hv_attr(version);
 	create_hv_attr(config_version);
@@ -180,6 +249,21 @@ static int __init create_sysfs_entries(void)
 		err = sysfs_create_bin_file(hypervisor_kobj, &hvconfig_bin);
 	}
 
+	if (!err) {
+		/*
+		 * Don't bother adding the hv_stats files on each CPU if
+		 * our hypervisor doesn't supply statistics.
+		 */
+		int cpu = raw_smp_processor_id();
+		long lotar = HV_XY_TO_LOTAR(cpu_x(cpu), cpu_y(cpu));
+		char dummy;
+		ssize_t n = hv_confstr(HV_CONFSTR_HV_STATS,
+				       (unsigned long) &dummy, 1,
+				       lotar, 0);
+		if (n >= 0)
+			err = subsys_interface_register(&hv_stats_interface);
+	}
+
 	return err;
 }
 subsys_initcall(create_sysfs_entries);