// SPDX-License-Identifier: GPL-2.0
/*
* sysfs.c - ACPI sysfs interface to userspace.
*/
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/acpi.h>
#include "internal.h"
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("sysfs");
#ifdef CONFIG_ACPI_DEBUG
/*
* ACPI debug sysfs I/F, including:
* /sys/modules/acpi/parameters/debug_layer
* /sys/modules/acpi/parameters/debug_level
* /sys/modules/acpi/parameters/trace_method_name
* /sys/modules/acpi/parameters/trace_state
* /sys/modules/acpi/parameters/trace_debug_layer
* /sys/modules/acpi/parameters/trace_debug_level
*/
struct acpi_dlayer {
const char *name;
unsigned long value;
};
struct acpi_dlevel {
const char *name;
unsigned long value;
};
#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
static const struct acpi_dlayer acpi_debug_layers[] = {
ACPI_DEBUG_INIT(ACPI_UTILITIES),
ACPI_DEBUG_INIT(ACPI_HARDWARE),
ACPI_DEBUG_INIT(ACPI_EVENTS),
ACPI_DEBUG_INIT(ACPI_TABLES),
ACPI_DEBUG_INIT(ACPI_NAMESPACE),
ACPI_DEBUG_INIT(ACPI_PARSER),
ACPI_DEBUG_INIT(ACPI_DISPATCHER),
ACPI_DEBUG_INIT(ACPI_EXECUTER),
ACPI_DEBUG_INIT(ACPI_RESOURCES),
ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
ACPI_DEBUG_INIT(ACPI_COMPILER),
ACPI_DEBUG_INIT(ACPI_TOOLS),
ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
};
static const struct acpi_dlevel acpi_debug_levels[] = {
ACPI_DEBUG_INIT(ACPI_LV_INIT),
ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
ACPI_DEBUG_INIT(ACPI_LV_INFO),
ACPI_DEBUG_INIT(ACPI_LV_REPAIR),
ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT),
ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
ACPI_DEBUG_INIT(ACPI_LV_PARSE),
ACPI_DEBUG_INIT(ACPI_LV_LOAD),
ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
ACPI_DEBUG_INIT(ACPI_LV_EXEC),
ACPI_DEBUG_INIT(ACPI_LV_NAMES),
ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
ACPI_DEBUG_INIT(ACPI_LV_TABLES),
ACPI_DEBUG_INIT(ACPI_LV_VALUES),
ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
ACPI_DEBUG_INIT(ACPI_LV_THREADS),
ACPI_DEBUG_INIT(ACPI_LV_IO),
ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
};
static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
{
int result = 0;
int i;
result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
acpi_debug_layers[i].name,
acpi_debug_layers[i].value,
(acpi_dbg_layer & acpi_debug_layers[i].value)
? '*' : ' ');
}
result +=
sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
ACPI_ALL_DRIVERS,
(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
== 0 ? ' ' : '-');
result +=
sprintf(buffer + result,
"--\ndebug_layer = 0x%08X ( * = enabled)\n",
acpi_dbg_layer);
return result;
}
static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
{
int result = 0;
int i;
result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
result += sprintf(buffer +