[net-next-2.6.git] / drivers / acpi / processor_core.c

/*
 * Copyright (C) 2005 Intel Corporation
 * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
 *
 *	Alex Chiang <achiang@hp.com>
 *	- Unified x86/ia64 implementations
 *	Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
 *	- Added _PDC for platforms with Intel CPUs
 */
#include <linux/dmi.h>
#include <linux/slab.h>

#include <acpi/acpi_drivers.h>
#include <acpi/processor.h>

#include "internal.h"

#define PREFIX			"ACPI: "
#define _COMPONENT		ACPI_PROCESSOR_COMPONENT
ACPI_MODULE_NAME("processor_core");

static int set_no_mwait(const struct dmi_system_id *id)
{
	printk(KERN_NOTICE PREFIX "%s detected - "
		"disabling mwait for CPU C-states\n", id->ident);
	idle_nomwait = 1;
	return 0;
}

static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
	{
	set_no_mwait, "IFL91 board", {
	DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
	DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"),
	DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"),
	DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL},
	{
	set_no_mwait, "Extensa 5220", {
	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
	DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
	DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
	{},
};

#ifdef CONFIG_SMP
static int map_lapic_id(struct acpi_subtable_header *entry,
		 u32 acpi_id, int *apic_id)
{
	struct acpi_madt_local_apic *lapic =
		(struct acpi_madt_local_apic *)entry;

	if (!(lapic->lapic_flags & ACPI_MADT_ENABLED))
		return 0;

	if (lapic->processor_id != acpi_id)
		return 0;

	*apic_id = lapic->id;
	return 1;
}

static int map_x2apic_id(struct acpi_subtable_header *entry,
			 int device_declaration, u32 acpi_id, int *apic_id)
{
	struct acpi_madt_local_x2apic *apic =
		(struct acpi_madt_local_x2apic *)entry;

	if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
		return 0;

	if (device_declaration && (apic->uid == acpi_id)) {
		*apic_id = apic->local_apic_id;
		return 1;
	}

	return 0;
}

static int map_lsapic_id(struct acpi_subtable_header *entry,
		int device_declaration, u32 acpi_id, int *apic_id)
{
	struct acpi_madt_local_sapic *lsapic =
		(struct acpi_madt_local_sapic *)entry;

	if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
		return 0;

	if (device_declaration) {
		if ((entry->length < 16) || (lsapic->uid != acpi_id))
			return 0;
	} else if (lsapic->processor_id != acpi_id)
		return 0;

	*apic_id = (lsapic->id << 8) | lsapic->eid;
	return 1;
}

static int map_madt_entry(int type, u32 acpi_id)
{
	unsigned long madt_end, entry;
	static struct acpi_table_madt *madt;
	static int read_madt;
	int apic_id = -1;

	if (!read_madt) {
		if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
					(struct acpi_table_header **)&madt)))
			madt = NULL;
		read_madt++;
	}

	if (!madt)
		return apic_id;

	entry = (unsigned long)madt;
	madt_end = entry + madt->header.length;

	/* Parse all entries looking for a match. */

	entry += sizeof(struct acpi_table_madt);
	while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
		struct acpi_subtable_header *header =
			(struct acpi_subtable_header *)entry;
		if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
			if (map_lapic_id(header, acpi_id, &apic_id))
				break;
		} else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
			if (map_x2apic_id(header, type, acpi_id, &apic_id))
				break;
		} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
			if (map_lsapic_id(header, type, acpi_id, &apic_id))
				break;
		}
		entry += header->length;
	}
	return apic_id;
}

static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	struct acpi_subtable_header *header;
	int apic_id = -1;

	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
		goto exit;

	if (!buffer.length || !buffer.pointer)
		goto exit;

	obj = buffer.pointer;
	if (obj->type != ACPI_TYPE_BUFFER ||
	    obj->buffer.length < sizeof(struct acpi_subtable_header)) {
		goto exit;
	}

	header = (struct acpi_subtable_header *)obj->buffer.pointer;
	if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
		map_lapic_id(header, acpi_id, &apic_id);
	} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
		map_lsapic_id(header, type, acpi_id, &apic_id);
	}

exit:
	if (buffer.pointer)
		kfree(buffer.pointer);
	return apic_id;
}

int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
{
	int i;
	int apic_id = -1;

	apic_id = map_mat_entry(handle, type, acpi_id);
	if (apic_id == -1)
		apic_id = map_madt_entry(type, acpi_id);
	if (apic_id == -1)
		return apic_id;

	for_each_possible_cpu(i) {
		if (cpu_physical_id(i) == apic_id)
			return i;
	}
	return -1;
}
EXPORT_SYMBOL_GPL(acpi_get_cpuid);
#endif

static bool processor_physically_present(acpi_handle handle)
{
	int cpuid, type;
	u32 acpi_id;
	acpi_status status;
	acpi_object_type acpi_type;
	unsigned long long tmp;
	union acpi_object object = { 0 };
	struct acpi_buffer buffer = { sizeof(union acpi_object), &object };

	status = acpi_get_type(handle, &acpi_type);
	if (ACPI_FAILURE(status))
		return false;

	switch (acpi_type) {
	case ACPI_TYPE_PROCESSOR:
		status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
		if (ACPI_FAILURE(status))
			return false;
		acpi_id = object.processor.proc_id;
		break;
	case ACPI_TYPE_DEVICE:
		status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
		if (ACPI_FAILURE(status))
			return false;
		acpi_id = tmp;
		break;
	default:
		return false;
	}

	type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
	cpuid = acpi_get_cpuid(handle, type, acpi_id);

	if ((cpuid == -1) && (num_possible_cpus() > 1))
		return false;

	return true;
}

static void acpi_set_pdc_bits(u32 *buf)
{
	buf[0] = ACPI_PDC_REVISION_ID;
	buf[1] = 1;

	/* Enable coordination with firmware's _TSD info */
	buf[2] = ACPI_PDC_SMP_T_SWCOORD;

	/* Twiddle arch-specific bits needed for _PDC */
	arch_acpi_set_pdc_bits(buf);
}

static struct acpi_object_list *acpi_processor_alloc_pdc(void)
{
	struct acpi_object_list *obj_list;
	union acpi_object *obj;
	u32 *buf;

	/* allocate and initialize pdc. It will be used later. */
	obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
	if (!obj_list) {
		printk(KERN_ERR "Memory allocation error\n");
		return NULL;
	}

	obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
	if (!obj) {
		printk(KERN_ERR "Memory allocation error\n");
		kfree(obj_list);
		return NULL;
	}

	buf = kmalloc(12, GFP_KERNEL);
	if (!buf) {
		printk(KERN_ERR "Memory allocation error\n");
		kfree(obj);
		kfree(obj_list);
		return NULL;
	}

	acpi_set_pdc_bits(buf);

	obj->type = ACPI_TYPE_BUFFER;
	obj->buffer.length = 12;
	obj->buffer.pointer = (u8 *) buf;
	obj_list->count = 1;
	obj_list->pointer = obj;

	return obj_list;
}

/*
 * _PDC is required for a BIOS-OS handshake for most of the newer
 * ACPI processor features.
 */
static int
acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
{
	acpi_status status = AE_OK;

	if (idle_nomwait) {
		/*
		 * If mwait is disabled for CPU C-states, the C2C3_FFH access
		 * mode will be disabled in the parameter of _PDC object.
		 * Of course C1_FFH access mode will also be disabled.
		 */
		union acpi_object *obj;
		u32 *buffer = NULL;

		obj = pdc_in->pointer;
		buffer = (u32 *)(obj->buffer.pointer);
		buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);

	}
	status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);

	if (ACPI_FAILURE(status))
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
		    "Could not evaluate _PDC, using legacy perf. control.\n"));

	return status;
}

void acpi_processor_set_pdc(acpi_handle handle)
{
	struct acpi_object_list *obj_list;

	if (arch_has_acpi_pdc() == false)
		return;

	obj_list = acpi_processor_alloc_pdc();
	if (!obj_list)
		return;

	acpi_processor_eval_pdc(handle, obj_list);

	kfree(obj_list->pointer->buffer.pointer);
	kfree(obj_list->pointer);
	kfree(obj_list);
}
EXPORT_SYMBOL_GPL(acpi_processor_set_pdc);

static acpi_status
early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
{
	if (processor_physically_present(handle) == false)
		return AE_OK;

	acpi_processor_set_pdc(handle);
	return AE_OK;
}

void __init acpi_early_processor_set_pdc(void)
{
	/*
	 * Check whether the system is DMI table. If yes, OSPM
	 * should not use mwait for CPU-states.
	 */
	dmi_check_system(processor_idle_dmi_table);

	acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
			    ACPI_UINT32_MAX,
			    early_init_pdc, NULL, NULL, NULL);
}
Commit	Line	Data
47817254 AC	1	/*
	2	* Copyright (C) 2005 Intel Corporation
	3	* Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
	4	*
	5	* Alex Chiang <achiang@hp.com>
	6	* - Unified x86/ia64 implementations
	7	* Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
	8	* - Added _PDC for platforms with Intel CPUs
	9	*/
78f16996	10	#include <linux/dmi.h>
5a0e3ad6	11	#include <linux/slab.h>
78f16996 AC	12
	13	#include <acpi/acpi_drivers.h>
	14	#include <acpi/processor.h>
	15
	16	#include "internal.h"
	17
	18	#define PREFIX "ACPI: "
	19	#define _COMPONENT ACPI_PROCESSOR_COMPONENT
4d5d4cd8	20	ACPI_MODULE_NAME("processor_core");
78f16996 AC	21
	22	static int set_no_mwait(const struct dmi_system_id *id)
	23	{
	24	printk(KERN_NOTICE PREFIX "%s detected - "
	25	"disabling mwait for CPU C-states\n", id->ident);
	26	idle_nomwait = 1;
	27	return 0;
	28	}
	29
	30	static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
	31	{
	32	set_no_mwait, "IFL91 board", {
	33	DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
	34	DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"),
	35	DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"),
	36	DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL},
	37	{
	38	set_no_mwait, "Extensa 5220", {
	39	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
	40	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
	41	DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
	42	DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
	43	{},
	44	};
	45
78ed8bd2	46	#ifdef CONFIG_SMP
78ed8bd2 AC	47	static int map_lapic_id(struct acpi_subtable_header *entry,
	48	u32 acpi_id, int *apic_id)
	49	{
	50	struct acpi_madt_local_apic *lapic =
	51	(struct acpi_madt_local_apic *)entry;
11130736 AC	52
	53	if (!(lapic->lapic_flags & ACPI_MADT_ENABLED))
	54	return 0;
	55
	56	if (lapic->processor_id != acpi_id)
	57	return 0;
	58
	59	*apic_id = lapic->id;
	60	return 1;
78ed8bd2 AC	61	}
	62
	63	static int map_x2apic_id(struct acpi_subtable_header *entry,
	64	int device_declaration, u32 acpi_id, int *apic_id)
	65	{
	66	struct acpi_madt_local_x2apic *apic =
	67	(struct acpi_madt_local_x2apic *)entry;
78ed8bd2	68
78ed8bd2 AC	69	if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
	70	return 0;
	71
d6742095 AC	72	if (device_declaration && (apic->uid == acpi_id)) {
	73	*apic_id = apic->local_apic_id;
	74	return 1;
78ed8bd2 AC	75	}
	76
	77	return 0;
78ed8bd2 AC	78	}
	79
	80	static int map_lsapic_id(struct acpi_subtable_header *entry,
	81	int device_declaration, u32 acpi_id, int *apic_id)
	82	{
	83	struct acpi_madt_local_sapic *lsapic =
	84	(struct acpi_madt_local_sapic *)entry;
78ed8bd2	85
78ed8bd2 AC	86	if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
	87	return 0;
	88
78ed8bd2	89	if (device_declaration) {
eae701ce AC	90	if ((entry->length < 16) \|\| (lsapic->uid != acpi_id))
	91	return 0;
	92	} else if (lsapic->processor_id != acpi_id)
	93	return 0;
78ed8bd2	94
eae701ce	95	*apic_id = (lsapic->id << 8) \| lsapic->eid;
78ed8bd2 AC	96	return 1;
	97	}
	98
	99	static int map_madt_entry(int type, u32 acpi_id)
	100	{
	101	unsigned long madt_end, entry;
149fe9c2 AC	102	static struct acpi_table_madt *madt;
149fe9c2 AC	103	static int read_madt;
78ed8bd2 AC	104	int apic_id = -1;
78ed8bd2 AC	105
149fe9c2 AC	106	if (!read_madt) {
	107	if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
	108	(struct acpi_table_header **)&madt)))
	109	madt = NULL;
	110	read_madt++;
	111	}
	112
78ed8bd2 AC	113	if (!madt)
	114	return apic_id;
	115
	116	entry = (unsigned long)madt;
	117	madt_end = entry + madt->header.length;
	118
	119	/* Parse all entries looking for a match. */
	120
	121	entry += sizeof(struct acpi_table_madt);
	122	while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
	123	struct acpi_subtable_header *header =
	124	(struct acpi_subtable_header *)entry;
	125	if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
	126	if (map_lapic_id(header, acpi_id, &apic_id))
	127	break;
	128	} else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
	129	if (map_x2apic_id(header, type, acpi_id, &apic_id))
	130	break;
	131	} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
	132	if (map_lsapic_id(header, type, acpi_id, &apic_id))
	133	break;
	134	}
	135	entry += header->length;
	136	}
	137	return apic_id;
	138	}
	139
	140	static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
	141	{
	142	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	143	union acpi_object *obj;
	144	struct acpi_subtable_header *header;
	145	int apic_id = -1;
	146
	147	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
	148	goto exit;
	149
	150	if (!buffer.length \|\| !buffer.pointer)
	151	goto exit;
	152
	153	obj = buffer.pointer;
	154	if (obj->type != ACPI_TYPE_BUFFER \|\|
	155	obj->buffer.length < sizeof(struct acpi_subtable_header)) {
	156	goto exit;
	157	}
	158
	159	header = (struct acpi_subtable_header *)obj->buffer.pointer;
	160	if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
	161	map_lapic_id(header, acpi_id, &apic_id);
	162	} else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
	163	map_lsapic_id(header, type, acpi_id, &apic_id);
	164	}
	165
	166	exit:
	167	if (buffer.pointer)
	168	kfree(buffer.pointer);
	169	return apic_id;
	170	}
	171
	172	int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
	173	{
	174	int i;
	175	int apic_id = -1;
	176
177	apic_id = map_mat_entry(handle, type, acpi_id);
178	if (apic_id == -1)
179	apic_id = map_madt_entry(type, acpi_id);
180	if (apic_id == -1)
181	return apic_id;
182
183	for_each_possible_cpu(i) {
184	if (cpu_physical_id(i) == apic_id)
185	return i;
186	}
187	return -1;
188	}
189	EXPORT_SYMBOL_GPL(acpi_get_cpuid);
190	#endif
191
5d554a7b AC	192	static bool processor_physically_present(acpi_handle handle)
	193	{
	194	int cpuid, type;
	195	u32 acpi_id;
	196	acpi_status status;
	197	acpi_object_type acpi_type;
	198	unsigned long long tmp;
	199	union acpi_object object = { 0 };
	200	struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
	201
	202	status = acpi_get_type(handle, &acpi_type);
	203	if (ACPI_FAILURE(status))
	204	return false;
	205
	206	switch (acpi_type) {
	207	case ACPI_TYPE_PROCESSOR:
	208	status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
	209	if (ACPI_FAILURE(status))
	210	return false;
	211	acpi_id = object.processor.proc_id;
	212	break;
	213	case ACPI_TYPE_DEVICE:
	214	status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
	215	if (ACPI_FAILURE(status))
	216	return false;
	217	acpi_id = tmp;
	218	break;
	219	default:
	220	return false;
	221	}
	222
	223	type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
	224	cpuid = acpi_get_cpuid(handle, type, acpi_id);
	225
856b185d	226	if ((cpuid == -1) && (num_possible_cpus() > 1))
5d554a7b AC	227	return false;
	228
	229	return true;
	230	}
78ed8bd2	231
08ea48a3 AC	232	static void acpi_set_pdc_bits(u32 *buf)
	233	{
	234	buf[0] = ACPI_PDC_REVISION_ID;
	235	buf[1] = 1;
	236
	237	/* Enable coordination with firmware's _TSD info */
	238	buf[2] = ACPI_PDC_SMP_T_SWCOORD;
6c5807d7 AC	239
	240	/* Twiddle arch-specific bits needed for _PDC */
	241	arch_acpi_set_pdc_bits(buf);
08ea48a3 AC	242	}
08ea48a3 AC	243
3b407aef	244	static struct acpi_object_list *acpi_processor_alloc_pdc(void)
407cd87c AC	245	{
	246	struct acpi_object_list *obj_list;
	247	union acpi_object *obj;
	248	u32 *buf;
	249
407cd87c AC	250	/* allocate and initialize pdc. It will be used later. */
	251	obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
	252	if (!obj_list) {
	253	printk(KERN_ERR "Memory allocation error\n");
3b407aef	254	return NULL;
407cd87c AC	255	}
	256
	257	obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
	258	if (!obj) {
	259	printk(KERN_ERR "Memory allocation error\n");
	260	kfree(obj_list);
3b407aef	261	return NULL;
407cd87c AC	262	}
	263
	264	buf = kmalloc(12, GFP_KERNEL);
	265	if (!buf) {
	266	printk(KERN_ERR "Memory allocation error\n");
	267	kfree(obj);
	268	kfree(obj_list);
3b407aef	269	return NULL;
407cd87c AC	270	}
407cd87c AC	271
08ea48a3 AC	272	acpi_set_pdc_bits(buf);
08ea48a3 AC	273
407cd87c AC	274	obj->type = ACPI_TYPE_BUFFER;
	275	obj->buffer.length = 12;
	276	obj->buffer.pointer = (u8 *) buf;
	277	obj_list->count = 1;
	278	obj_list->pointer = obj;
407cd87c	279
3b407aef	280	return obj_list;
407cd87c AC	281	}
407cd87c AC	282
78f16996 AC	283	/*
	284	* _PDC is required for a BIOS-OS handshake for most of the newer
	285	* ACPI processor features.
	286	*/
fa118564 AC	287	static int
fa118564 AC	288	acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
78f16996	289	{
78f16996 AC	290	acpi_status status = AE_OK;
78f16996 AC	291
78f16996 AC	292	if (idle_nomwait) {
	293	/*
	294	* If mwait is disabled for CPU C-states, the C2C3_FFH access
	295	* mode will be disabled in the parameter of _PDC object.
	296	* Of course C1_FFH access mode will also be disabled.
	297	*/
	298	union acpi_object *obj;
	299	u32 *buffer = NULL;
	300
	301	obj = pdc_in->pointer;
	302	buffer = (u32 *)(obj->buffer.pointer);
	303	buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH \| ACPI_PDC_C_C1_FFH);
	304
	305	}
fa118564	306	status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
78f16996 AC	307
	308	if (ACPI_FAILURE(status))
	309	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	310	"Could not evaluate _PDC, using legacy perf. control.\n"));
	311
	312	return status;
	313	}
	314
43bab25c	315	void acpi_processor_set_pdc(acpi_handle handle)
78f16996	316	{
3b407aef AC	317	struct acpi_object_list *obj_list;
3b407aef AC	318
1d9cb470 AC	319	if (arch_has_acpi_pdc() == false)
	320	return;
	321
3b407aef AC	322	obj_list = acpi_processor_alloc_pdc();
	323	if (!obj_list)
	324	return;
	325
43bab25c	326	acpi_processor_eval_pdc(handle, obj_list);
b9c2db78 AC	327
	328	kfree(obj_list->pointer->buffer.pointer);
	329	kfree(obj_list->pointer);
	330	kfree(obj_list);
78f16996 AC	331	}
	332	EXPORT_SYMBOL_GPL(acpi_processor_set_pdc);
	333
	334	static acpi_status
	335	early_init_pdc(acpi_handle handle, u32 lvl, void context, void *rv)
	336	{
5d554a7b AC	337	if (processor_physically_present(handle) == false)
	338	return AE_OK;
	339
43bab25c	340	acpi_processor_set_pdc(handle);
78f16996 AC	341	return AE_OK;
	342	}
	343
7a0b73a4	344	void __init acpi_early_processor_set_pdc(void)
78f16996 AC	345	{
	346	/*
	347	* Check whether the system is DMI table. If yes, OSPM
	348	* should not use mwait for CPU-states.
	349	*/
	350	dmi_check_system(processor_idle_dmi_table);
	351
	352	acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
	353	ACPI_UINT32_MAX,
	354	early_init_pdc, NULL, NULL, NULL);
	355	}