processor_core.c revision d18960494f65ca4fa0d67c865aaca99452070d15
147817254b8637b56730aec26eed2c337d3938bb5Alex Chiang/* 247817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Copyright (C) 2005 Intel Corporation 347817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. 447817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * 547817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Alex Chiang <achiang@hp.com> 647817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * - Unified x86/ia64 implementations 747817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> 847817254b8637b56730aec26eed2c337d3938bb5Alex Chiang * - Added _PDC for platforms with Intel CPUs 947817254b8637b56730aec26eed2c337d3938bb5Alex Chiang */ 1078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <linux/dmi.h> 115a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 1278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <acpi/acpi_drivers.h> 1478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <acpi/processor.h> 1578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include "internal.h" 1778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#define PREFIX "ACPI: " 1978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#define _COMPONENT ACPI_PROCESSOR_COMPONENT 204d5d4cd88c542ff56cf7feacd29cc907f2abbfbbAlex ChiangACPI_MODULE_NAME("processor_core"); 2178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 2278f1699659963fff97975df44db6d5dbe7218e55Alex Chiangstatic int set_no_mwait(const struct dmi_system_id *id) 2378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 2478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang printk(KERN_NOTICE PREFIX "%s detected - " 2578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang "disabling mwait for CPU C-states\n", id->ident); 26d18960494f65ca4fa0d67c865aaca99452070d15Thomas Renninger boot_option_idle_override = IDLE_NOMWAIT; 2778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return 0; 2878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 2978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 3078f1699659963fff97975df44db6d5dbe7218e55Alex Chiangstatic struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { 3178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang { 3278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang set_no_mwait, "Extensa 5220", { 3378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 3478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 3578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), 3678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, 3778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang {}, 3878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang}; 3978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 4078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang#ifdef CONFIG_SMP 4178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_lapic_id(struct acpi_subtable_header *entry, 4278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang u32 acpi_id, int *apic_id) 4378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 4478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_madt_local_apic *lapic = 4578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_madt_local_apic *)entry; 4611130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang 4711130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang if (!(lapic->lapic_flags & ACPI_MADT_ENABLED)) 4811130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang return 0; 4911130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang 5011130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang if (lapic->processor_id != acpi_id) 5111130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang return 0; 5211130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang 5311130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang *apic_id = lapic->id; 5411130736c99c37e253f45b2d3fd30b07313f83c6Alex Chiang return 1; 5578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 5678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 5778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_x2apic_id(struct acpi_subtable_header *entry, 5878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int device_declaration, u32 acpi_id, int *apic_id) 5978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 6078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_madt_local_x2apic *apic = 6178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_madt_local_x2apic *)entry; 6278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 6378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) 6478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 6578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 66d67420956b7b1dcffb894b2f1f81b9408fca1b4cAlex Chiang if (device_declaration && (apic->uid == acpi_id)) { 67d67420956b7b1dcffb894b2f1f81b9408fca1b4cAlex Chiang *apic_id = apic->local_apic_id; 68d67420956b7b1dcffb894b2f1f81b9408fca1b4cAlex Chiang return 1; 6978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 7078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 7178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 7278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 7378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 7478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_lsapic_id(struct acpi_subtable_header *entry, 7578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int device_declaration, u32 acpi_id, int *apic_id) 7678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 7778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_madt_local_sapic *lsapic = 7878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_madt_local_sapic *)entry; 7978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 8078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) 8178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 0; 8278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 8378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (device_declaration) { 84eae701ceadf5aa3fc3b334029ef71f6885ef1cdeAlex Chiang if ((entry->length < 16) || (lsapic->uid != acpi_id)) 85eae701ceadf5aa3fc3b334029ef71f6885ef1cdeAlex Chiang return 0; 86eae701ceadf5aa3fc3b334029ef71f6885ef1cdeAlex Chiang } else if (lsapic->processor_id != acpi_id) 87eae701ceadf5aa3fc3b334029ef71f6885ef1cdeAlex Chiang return 0; 8878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 89eae701ceadf5aa3fc3b334029ef71f6885ef1cdeAlex Chiang *apic_id = (lsapic->id << 8) | lsapic->eid; 9078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return 1; 9178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 9278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 9378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_madt_entry(int type, u32 acpi_id) 9478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 9578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang unsigned long madt_end, entry; 96149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang static struct acpi_table_madt *madt; 97149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang static int read_madt; 9878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 9978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 100149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang if (!read_madt) { 101149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, 102149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang (struct acpi_table_header **)&madt))) 103149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang madt = NULL; 104149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang read_madt++; 105149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang } 106149fe9c293f76803206648270ca24fc2604d5f01Alex Chiang 10778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!madt) 10878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 10978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 11078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang entry = (unsigned long)madt; 11178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang madt_end = entry + madt->header.length; 11278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 11378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang /* Parse all entries looking for a match. */ 11478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 11578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang entry += sizeof(struct acpi_table_madt); 11678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang while (entry + sizeof(struct acpi_subtable_header) < madt_end) { 11778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_subtable_header *header = 11878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang (struct acpi_subtable_header *)entry; 11978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { 12078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (map_lapic_id(header, acpi_id, &apic_id)) 12178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang break; 12278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { 12378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (map_x2apic_id(header, type, acpi_id, &apic_id)) 12478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang break; 12578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { 12678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (map_lsapic_id(header, type, acpi_id, &apic_id)) 12778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang break; 12878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 12978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang entry += header->length; 13078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 13178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 13278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 13378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 13478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangstatic int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) 13578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 13678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 13778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang union acpi_object *obj; 13878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang struct acpi_subtable_header *header; 13978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 14078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 14178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 14278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto exit; 14378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 14478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (!buffer.length || !buffer.pointer) 14578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto exit; 14678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 14778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang obj = buffer.pointer; 14878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (obj->type != ACPI_TYPE_BUFFER || 14978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang obj->buffer.length < sizeof(struct acpi_subtable_header)) { 15078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang goto exit; 15178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 15278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 15378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang header = (struct acpi_subtable_header *)obj->buffer.pointer; 15478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { 15578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang map_lapic_id(header, acpi_id, &apic_id); 15678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { 15778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang map_lsapic_id(header, type, acpi_id, &apic_id); 15878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 15978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 16078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangexit: 16178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (buffer.pointer) 16278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang kfree(buffer.pointer); 16378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 16478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 16578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 16678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiangint acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) 16778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang{ 16878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int i; 16978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 17078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 17178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang apic_id = map_mat_entry(handle, type, acpi_id); 17278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (apic_id == -1) 17378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang apic_id = map_madt_entry(type, acpi_id); 17478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (apic_id == -1) 17578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return apic_id; 17678ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 17778ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang for_each_possible_cpu(i) { 17878ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (cpu_physical_id(i) == apic_id) 17978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return i; 18078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 18178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return -1; 18278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 18378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex ChiangEXPORT_SYMBOL_GPL(acpi_get_cpuid); 18478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang#endif 18578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 1865d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiangstatic bool processor_physically_present(acpi_handle handle) 1875d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang{ 1885d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang int cpuid, type; 1895d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang u32 acpi_id; 1905d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_status status; 1915d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_object_type acpi_type; 1925d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang unsigned long long tmp; 1935d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang union acpi_object object = { 0 }; 1945d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; 1955d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 1965d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_get_type(handle, &acpi_type); 1975d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 1985d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 1995d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2005d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang switch (acpi_type) { 2015d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang case ACPI_TYPE_PROCESSOR: 2025d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_evaluate_object(handle, NULL, NULL, &buffer); 2035d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2045d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2055d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_id = object.processor.proc_id; 2065d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang break; 2075d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang case ACPI_TYPE_DEVICE: 2085d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp); 2095d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2105d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2115d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_id = tmp; 2125d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang break; 2135d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang default: 2145d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2155d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang } 2165d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2175d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0; 2185d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang cpuid = acpi_get_cpuid(handle, type, acpi_id); 2195d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 220856b185dd23da39e562983fbf28860f54e661b41Alex Chiang if ((cpuid == -1) && (num_possible_cpus() > 1)) 2215d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2225d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2235d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return true; 2245d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang} 22578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 22608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiangstatic void acpi_set_pdc_bits(u32 *buf) 22708ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang{ 22808ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[0] = ACPI_PDC_REVISION_ID; 22908ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[1] = 1; 23008ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 23108ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang /* Enable coordination with firmware's _TSD info */ 23208ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[2] = ACPI_PDC_SMP_T_SWCOORD; 2336c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang 2346c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang /* Twiddle arch-specific bits needed for _PDC */ 2356c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang arch_acpi_set_pdc_bits(buf); 23608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang} 23708ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 2383b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiangstatic struct acpi_object_list *acpi_processor_alloc_pdc(void) 239407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang{ 240407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang struct acpi_object_list *obj_list; 241407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang union acpi_object *obj; 242407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang u32 *buf; 243407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 244407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang /* allocate and initialize pdc. It will be used later. */ 245407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); 246407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!obj_list) { 247407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 2483b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 249407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 250407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 251407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); 252407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!obj) { 253407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 254407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj_list); 2553b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 256407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 257407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 258407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang buf = kmalloc(12, GFP_KERNEL); 259407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!buf) { 260407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 261407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj); 262407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj_list); 2633b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 264407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 265407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 26608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang acpi_set_pdc_bits(buf); 26708ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 268407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->type = ACPI_TYPE_BUFFER; 269407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->buffer.length = 12; 270407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->buffer.pointer = (u8 *) buf; 271407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list->count = 1; 272407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list->pointer = obj; 273407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 2743b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return obj_list; 275407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang} 276407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 27778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang/* 27878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * _PDC is required for a BIOS-OS handshake for most of the newer 27978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * ACPI processor features. 28078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 281fa118564ed66f785f957d8230745b62e9244700dAlex Chiangstatic int 282fa118564ed66f785f957d8230745b62e9244700dAlex Chiangacpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) 28378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 28478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang acpi_status status = AE_OK; 28578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 286d18960494f65ca4fa0d67c865aaca99452070d15Thomas Renninger if (boot_option_idle_override == IDLE_NOMWAIT) { 28778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang /* 28878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * If mwait is disabled for CPU C-states, the C2C3_FFH access 28978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * mode will be disabled in the parameter of _PDC object. 29078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * Of course C1_FFH access mode will also be disabled. 29178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 29278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang union acpi_object *obj; 29378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang u32 *buffer = NULL; 29478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 29578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang obj = pdc_in->pointer; 29678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang buffer = (u32 *)(obj->buffer.pointer); 29778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); 29878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 29978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang } 300fa118564ed66f785f957d8230745b62e9244700dAlex Chiang status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); 30178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 30278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang if (ACPI_FAILURE(status)) 30378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang ACPI_DEBUG_PRINT((ACPI_DB_INFO, 30478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang "Could not evaluate _PDC, using legacy perf. control.\n")); 30578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 30678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return status; 30778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 30878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 30943bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiangvoid acpi_processor_set_pdc(acpi_handle handle) 31078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 3113b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang struct acpi_object_list *obj_list; 3123b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang 3131d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang if (arch_has_acpi_pdc() == false) 3141d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang return; 3151d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang 3163b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang obj_list = acpi_processor_alloc_pdc(); 3173b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang if (!obj_list) 3183b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return; 3193b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang 32043bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiang acpi_processor_eval_pdc(handle, obj_list); 321b9c2db783456bcbce31e2482214cd337528db295Alex Chiang 322b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list->pointer->buffer.pointer); 323b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list->pointer); 324b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list); 32578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 32678f1699659963fff97975df44db6d5dbe7218e55Alex ChiangEXPORT_SYMBOL_GPL(acpi_processor_set_pdc); 32778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 32878f1699659963fff97975df44db6d5dbe7218e55Alex Chiangstatic acpi_status 32978f1699659963fff97975df44db6d5dbe7218e55Alex Chiangearly_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv) 33078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 3315d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (processor_physically_present(handle) == false) 3325d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return AE_OK; 3335d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 33443bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiang acpi_processor_set_pdc(handle); 33578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return AE_OK; 33678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 33778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 3387a0b73a49ab56fb1e836675c00d6d0d2ba39a714Tony Luckvoid __init acpi_early_processor_set_pdc(void) 33978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 34078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang /* 34178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * Check whether the system is DMI table. If yes, OSPM 34278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * should not use mwait for CPU-states. 34378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 34478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang dmi_check_system(processor_idle_dmi_table); 34578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 34678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, 34778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang ACPI_UINT32_MAX, 34878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang early_init_pdc, NULL, NULL, NULL); 349c1e0ddbf0a97e1704d7f13b4934f9acca002402dYinghai Lu acpi_get_devices("ACPI0007", early_init_pdc, NULL, NULL); 35078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 351