1. Copy the command below, paste it into the command window and press ENTER: sc config AcpiPmi start= demand 3. In Windows 10 it is starting only if the user, an application or another service starts it. +interval, an optional capping mechanism, and a couple of trip points. ACPI Power Meter Driver - Windows 8 Service. + &resource->sensors[resource->num_sensors]; + sensors->dev_attr.attr.name = ro->label; + sensors->dev_attr.attr.mode = S_IRUGO; + res = device_create_file(dev, &sensors->dev_attr); +static int register_rw_attrs(struct acpi_power_meter_resource *resource. + result = acpi_bus_register_driver(&acpi_power_meter_driver); +static void __exit acpi_power_meter_exit(void). A WDM driver that provides the Power Meter Interface (PMI) accesses power metering and budgeting (PMB) information from the underlying hardware platform. 3. If ACPI Power Meter Driver fails to start, the error details are added to Windows 8 error log. +{"power1_average_min", show_val, set_trip, 7}. + sensors->dev_attr.attr.name = rw->label; + sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR; +static void remove_attrs(struct acpi_power_meter_resource *resource), + for (i = 0; i < resource->num_sensors; i++) {, + if (!resource->sensors[i].dev_attr.attr.name). featuresa power meter that returns average power use over a configurable The AcpiPmi service is using the acpipmi.sys file that is located in the C:\Windows\System32\drivers directory. + status = acpi_bus_get_device(element->reference.handle. This driver implements sensor reading support for the power meters exposed in + strncpy(*str, element->string.pointer, element->string.length); + dev_info(&resource->acpi_dev->dev, "Found ACPI power meter.\n"); +static void acpi_power_meter_notify(struct acpi_device *device, u32 event). power[1-*]_interval will be notified if the firmware changes the averaging Kernel driver power_meter The Linux Kernel documentation The Linux Kernel 6.1.0-rc8 A guide to the Kernel Development Process Submitting patches: the essential guide to getting your code into the kernel Code of conduct Kernel Maintainer Handbook All development-process docs Core API Documentation The Linux driver implementer's API guide Copy the command below, paste it into the command window and press ENTER: 3. + res = register_rw_attrs(resource, trip_attrs); + res = register_ro_attrs(resource, misc_attrs); +static void free_capabilities(struct acpi_power_meter_resource *resource), +static int read_capabilities(struct acpi_power_meter_resource *resource). If ACPI Power Meter Driver fails to start, the error is logged. + struct acpi_device *obj = resource->domain_devices[i]; + sysfs_remove_link(resource->holders_dir, +static int read_domain_devices(struct acpi_power_meter_resource *resource). This driver exposes ACPI 4.0 compliant power meters as hardware monitoring devices. Search For More Drivers *: Go! AMDGPU Driver with KFD used by the ROCm project. Figure 3. This service also exists in Windows 10 and 7. + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GHL")); +static ssize_t show_cap(struct device *dev. 1. average power consumption exceeds the cap, an ACPI event will be broadcast on + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PMM". 2. + kobject_name(&obj->dev.kobj)); +static int register_ro_attrs(struct acpi_power_meter_resource *resource. + return sprintf(buf, "%llu\n", resource->cap * 1000); +static ssize_t set_cap(struct device *dev, struct device_attribute *devattr, + if (temp > resource->caps.max_cap || temp < resource->caps.min_cap). 3. + return sprintf(buf, "%s\n", ACPI_POWER_METER_NAME); +/* Sensor descriptions. This driver exposes ACPI 4.0 compliant power meters as hardware monitoring devices. 4. + const char *buf, size_t count); +static int update_avg_interval(struct acpi_power_meter_resource *resource). + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMM")); + resource->sensors_last_updated = jiffies; +static ssize_t show_power(struct device *dev. interval. Save the RestoreACPIPowerMeterDriverWindows8.bat file to any folder on your hard drive. 2. +MODULE_DEVICE_TABLE(acpi, power_meter_ids); + struct acpi_power_meter_capabilities caps; + struct sensor_device_attribute sensors[NUM_SENSORS]; + struct device_attribute *devattr. + * You should have received a copy of the GNU General Public License, + * along with this program; if not, write to the Free Software, + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA, +#define ACPI_POWER_METER_NAME "power_meter". Close the command window and restart the computer. > + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PAI". well as sent as a poll notification to a sysfs file. 1. The driver does this by using the ACPI PMI objects. This second revision of the driver also exports the ACPI string Restore Default Startup Type of ACPI Power Meter Driver Automated Restore 1. + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + resource->trip[attr->index - 7] = temp; +static int update_meter(struct acpi_power_meter_resource *resource), + if (time_before(local_jiffies, resource->sensors_last_updated +, + msecs_to_jiffies(resource->caps.sampling_time)) &&. + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PAI")); +static int update_cap(struct acpi_power_meter_resource *resource). + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMD")); + dev_err(&resource->acpi_dev->dev, PREFIX "Invalid _PMD data\n"); + resource->domain_devices = kzalloc(sizeof(struct acpi_device *) *. A WDM driver that provides the Power Meter Interface (PMI) accesses power metering and budgeting (PMB) information from the underlying hardware platform. + dev_info(&device->dev, "Capping in progress.\n"); + acpi_bus_generate_netlink_event(ACPI_POWER_METER_CLASS, +static int acpi_power_meter_add(struct acpi_device *device). +Both power[1-*]_average_{min,max} must be set before the trip points will work. If the file is removed or corrupted, read this article to restore its original version from Windows 8 installation media. 64-bit. The responsibilities of Acpi.sys include support for power management and Plug and Play (PnP) device enumeration. socket and a poll notification will be sent to the appropriate Save the RestoreACPIPowerMeterDriverWindows10.bat file to any folder on your hard drive. Restore Default Startup Type of ACPI Power Meter Driver Automated Restore 1. appropriate power[1-*]_alarm file to indicate that capping has begun, and the The The ACPI Power Meter Driver service is a kernel device driver. > info as sysfs attributes, a list of the devices that the meter measures. Is it just me, or do we need. +The power[1-*]_is_battery knob indicates if the power supply is a battery. The Windows ACPI driver, Acpi.sys, is an inbox component of the Windows operating system. +static ssize_t show_val(struct device *dev. arbitrary strings that ACPI provides with the meter. Run the Command Prompt as an administrator. This service also exists in Windows 10 and 7. Next in thread: ykzhao: "Re: [PATCH 2/2] acpi_power_meter: hwmon driver for ACPI 4.0 powermeters" Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] This driver exposes ACPI 4.0 compliant power meters as hardware monitoring These devices have a simple set of, +features--a power meter that returns average power use over a configurable. In Windows 7 and prior versions of Windows, the power meter interface is available through the Advanced Naming and data format standards for sysfs files, A guide to the Kernel Development Process, Submitting patches: the essential guide to getting your code into the kernel, The Linux driver implementers API guide, Linux CPUFreq - CPU frequency and voltage scaling code in the Linux(TM) kernel, How to Get Your Patch Accepted Into the Hwmon Subsystem, Kernel drivers ltc2947-i2c and ltc2947-spi, Assorted Miscellaneous Devices Documentation, The Linux kernel users and administrators guide. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of, + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + return sprintf(buf, "%llu\n", resource->power * 1000); +static ssize_t show_str(struct device *dev. These devices have a simple set of +{"power1_average_interval", show_avg_interval, set_avg_interval, 0}, +static struct ro_sensor_template misc_cap_attrs[] = {, +static struct ro_sensor_template ro_cap_attrs[] = {, +static struct rw_sensor_template rw_cap_attrs[] = {, +static struct rw_sensor_template trip_attrs[] = {. + * GNU General Public License for more details. Author: Darrick J. Wong Description ----- This driver implements sensor reading support for the power meters exposed in the ACPI 4.0 spec (Chapter 10.4). This section provides guidance to integrate the MAX34407/MAX34417 into the system with the Maxim power meter driver and Windows 10 operating system. all cases the ACPI event will be broadcast on the ACPI netlink event socket as the ACPI 4.0 spec (Chapter 10.4). + Datasheet: http://acpi.info/, section 10.4. > + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SHL")); > > + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PAI")); > I find this test of `data' inexplicable. + union acpi_object arg0 = { ACPI_TYPE_INTEGER }; + struct acpi_object_list args = { 1, &arg0 }; + if (temp > resource->caps.max_avg_interval ||, + temp < resource->caps.min_avg_interval). Copyright The kernel development community. When the This second revision of the driver also exports the ACPI string info as sysfs attributes, a list of the devices that the meter measures, and will send ACPI notifications over the ACPI netlink socket. This message is generally interpreted as meaning: The system is operating under an unsafe power cap and Linux is ignoring this fact, thus living dangerously. Datasheet: https://uefi.org/specifications, section 10.4. + val = resource->caps.hysteresis * 1000; + if (resource->caps.flags & POWER_METER_IS_BATTERY), + if (resource->trip[attr->index - 7] < 0). Also contains the current Linux Kernel that matches this base driver - ROCK-Kernel-Driver/acpi_power_meter.c at . > + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PAI")); > +static ssize_t set_cap(struct device *dev, struct device_attribute *devattr, > + const char *buf, size_t count), > + if (temp > resource->caps.max_cap || temp < resource->caps.min_cap). This driver talks to ACPI 4.0 power meters. +This driver talks to ACPI 4.0 power meters. This second revision of the driver also exports the ACPI string. 2. 2. The measures/ directory > + struct acpi_device *acpi_dev = to_acpi_device(dev); > + struct acpi_power_meter_resource *resource = acpi_dev->driver_data; > + union acpi_object arg0 = { ACPI_TYPE_INTEGER }; > + struct acpi_object_list args = { 1, &arg0 }; > + res = strict_strtoul(buf, 10, &temp); > + if (temp > resource->caps.max_avg_interval ||, > + temp < resource->caps.min_avg_interval). + res = register_rw_attrs(resource, rw_cap_attrs); + res = register_ro_attrs(resource, ro_cap_attrs); + res = register_ro_attrs(resource, misc_cap_attrs); + if (resource->caps.flags & POWER_METER_CAN_TRIP) {. interval, an optional capping mechanism, and a couple of trip points. Note. The ACPI Power Meter Driver service is a kernel mode driver. +The measures/ directory contains symlinks to the devices that this meter, diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig, + This driver exposes ACPI 4.0 power meters as hardware monitoring, + devices. + struct acpi_object_list args = { 2, arg_objs }; + if (resource->trip[0] < 0 || resource->trip[1] < 0), + /* This driver stores min, max; ACPI wants max, min. + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GAI")); +static ssize_t show_avg_interval(struct device *dev. There are a few other ACPI notifications that can be sent by the firmware. + struct acpi_power_meter_resource *resource; + if (!device || !acpi_driver_data(device)). Both power[1-*]_average_{min,max} must be set before the trip points will work. When the operating system startup is complete, the user is being notified that the AcpiPmi service hasn't been started. +The power[1-*]_{model_number, serial_number, oem_info} fields display arbitrary. follows: power[1-*]_cap will be notified if the firmware changes the power cap. +{"power1_average_max", show_val, set_trip, 8}, +static struct ro_sensor_template misc_attrs[] = {, +static void remove_domain_devices(struct acpi_power_meter_resource *resource), + for (i = 0; i < resource->num_domain_devices; i++) {. Make sure that the acpipmi.sys file exists in the %WinDir%\System32\drivers folder. Say Y (or M) if you have an Intel or AMD computer with. + device_remove_file(&resource->acpi_dev->dev, +static int setup_attrs(struct acpi_power_meter_resource *resource), + if (resource->caps.flags & POWER_METER_CAN_MEASURE) {. + unsigned int acc = resource->caps.accuracy; + return sprintf(buf, "%u.%u%%\n", acc / 1000, acc % 1000); +static ssize_t show_name(struct device *dev. +{"power1_average_interval_min", show_val, 0}. + struct acpi_buffer state = { 0, NULL }; + struct acpi_buffer format = { sizeof("NNNNNNNNNNN"), "NNNNNNNNNNN" }; + status = acpi_evaluate_object(resource->acpi_dev->handle, "_PMC", NULL. For SoC-based platforms, Windows provides built-in drivers to support the ACPI-defined devices that are described in this article. Then Windows 10 will start up and notify the user that the AcpiPmi service has failed to start due to the error. This section provides a high-level overview of the ACPI PMI. This driver exposes ACPI 4.0 compliant power meters as hardware monitoring devices. + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PMC")); + dev_err(&resource->acpi_dev->dev, PREFIX "Invalid _PMC data\n"); + /* Grab all the integer data at once */. + union acpi_object *element = &(pss->package.elements[i]); + if (element->type != ACPI_TYPE_LOCAL_REFERENCE), + /* Create a symlink to domain objects */. This second revision of the driver also exports the ACPI string info as sysfs attributes, a list of the devices that the meter measures, and will send ACPI notifications over the ACPI netlink socket. Kernel driver power_meter The Linux Kernel documentation The Linux Kernel 5.12.0 The Linux kernel user's and administrator's guide Kernel Build System The Linux kernel firmware guide Open Firmware and Device Tree The Linux kernel user-space API guide Working with the kernel development community The events are as If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media. + strcpy(acpi_device_name(device), ACPI_POWER_METER_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_POWER_METER_CLASS); + resource->trip[0] = resource->trip[1] = -1; + resource->hwmon_dev = hwmon_device_register(&device->dev); +static int acpi_power_meter_remove(struct acpi_device *device, int type). + state.length = sizeof(struct acpi_power_meter_capabilities); + status = acpi_extract_package(pss, &format, &state); + ACPI_EXCEPTION((AE_INFO, status, "Invalid data")); + dev_err(&resource->acpi_dev->dev, PREFIX "Unknown unit %llu.\n", + if (element->type != ACPI_TYPE_STRING) {. These devices have a simple set of features-a power meter that returns average power use over a configurable interval, an optional capping mechanism, and a couple of trip points. > + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_SHL". Copy the command below, paste it into the command window and press ENTER: 3. In Windows 8 it will not be started until the user starts it. Run the Command Prompt as an administrator. Microsoft ACPI-Compliant Power Meter Device - Driver Download * Vendor: Microsoft * Product: Microsoft ACPI-Compliant Power Meter Device * Hardware Class: System . + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_GHL". + struct device *dev = &resource->acpi_dev->dev; + struct sensor_device_attribute *sensors =. + hwmon_device_unregister(resource->hwmon_dev); +static int acpi_power_meter_resume(struct acpi_device *device), +static struct acpi_driver acpi_power_meter_driver = {, +static int __init acpi_power_meter_init(void). Right-click the downloaded batch file and select Run as administrator. of Naming and data format standards for sysfs files. + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_GAI". See the. The platform exposes this information by using the ACPI 4.0 Power Metering objects. For example, ACPI defines a power button, a sleep button, and system indicators. + struct acpi_device *acpi_dev = to_acpi_device(dev); + struct acpi_power_meter_resource *resource = acpi_dev->driver_data; + return sprintf(buf, "%llu\n", resource->avg_interval); +static ssize_t set_avg_interval(struct device *dev. hardware has taken action to reduce power consumption. + struct device_attribute *devattr. + val = resource->trip[attr->index - 7] * 1000; +static ssize_t show_accuracy(struct device *dev. Close the command window and restart the computer. */. > +static ssize_t set_avg_interval(struct device *dev. Select your Windows 7 edition and Service Pack, and then click on the Download button below. + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SHL")); +static int set_acpi_trip(struct acpi_power_meter_resource *resource). + val = resource->caps.min_avg_interval; + val = resource->caps.max_avg_interval; + if (resource->caps.hysteresis == UNKNOWN_HYSTERESIS). + &resource->domain_devices[i]); + res = sysfs_create_link(resource->holders_dir, &obj->dev.kobj. Close the command window and restart the computer. Right-click the downloaded batch file and select Run as administrator. 4. %SystemRoot%\System32\drivers\acpipmi.sys, HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AcpiPmi. In Windows 8 it will not be started until the user starts it. If this is It, or its presumed origin, has been blamed for system crashes. the case, the power[1-*]_cap and related sysfs files will appear. */, +static struct ro_sensor_template meter_ro_attrs[] = {. + To compile this driver as a module, choose M here: + the module will be called power-meter. + resource->num_domain_devices = pss->package.count; + for (i = 0; i < pss->package.count; i++) {. These objects provide an abstraction layer to the protocol that is used for power metering and budgeting by the hardware platform. +strings that ACPI provides with the meter. Select your Windows 10 edition and release, and then click on the Download button below. [PATCH 4.19 20/36] hwmon: (acpi_power_meter) Fix potential memory leak in acpi_power_meter_add() Greg Kroah-Hartman Tue, 07 Jul 2020 08:19:39 -0700 > and will send ACPI notifications over the ACPI netlink socket. When both of them are set, an ACPI event will be broadcast on the ACPI netlink power[1-*]_average sysfs file. ACPI Power Metering Driver by Microsoft Corporation. Right-click the downloaded batch file and select Run as administrator. ACPI Power Metering Driver by Microsoft Corporation. These devices have a simple set of features--a power meter that returns average power use over a configurable interval, an optional capping mechanism, and a couple of trip points. result in reduced performance. + res = register_ro_attrs(resource, meter_ro_attrs); + res = register_rw_attrs(resource, meter_rw_attrs); + if (resource->caps.flags & POWER_METER_CAN_CAP) {, + if (resource->caps.configurable_cap) {. The ACPI Power Meter Driver service is a kernel device driver. When the operating system startup is complete, the user is being notified that the AcpiPmi service hasn't been started. Run the Command Prompt as an administrator. ACPI Power Metering Driver by Microsoft Corporation. This section provides a high-level overview of the ACPI PMI. +ACPI_MODULE_NAME(ACPI_POWER_METER_NAME); +#define ACPI_POWER_METER_DEVICE_NAME "Power Meter", +#define ACPI_POWER_METER_CLASS "power_meter_resource", +#define POWER_METER_CAN_MEASURE (1 << 0), +static struct acpi_device_id power_meter_ids[] = {. Save the RestoreACPIPowerMeterDriverWindows7.bat file to any folder on your hard drive. > > + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SHL")); diff --git a/Documentation/hwmon/acpi_power_meter b/Documentation/hwmon/acpi_power_meter, +++ b/Documentation/hwmon/acpi_power_meter. contains symlinks to the devices that this meter measures. 1. The ACPI PMI is provided by the ACPI 4.0 Power Metering objects. If ACPI Power Meter Driver fails to start, the error details are added to Windows 8 error log. sysfs interface conforms with the specification outlined in the Power section + status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PAI". Maxim power-meter-based system architecture. Windows 8 edition Windows 8 Windows 8.1 Windows 8.1 Update 1; Core: Manual: Manual: Manual: Pro: Manual: Manual: Manual: Enterprise: Manual: Manual: Manual: Default Properties. This abstraction layer provides a consistent power supply and meter interface to the operating system across all hardware platforms. Signed-off-by: Darrick J. Wong
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