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 */ 10214f2c90b970e098e75cf719c0c5b0f1fe69b716Paul Gortmaker#include <linux/export.h> 1178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <linux/dmi.h> 125a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 1378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <acpi/acpi_drivers.h> 1578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include <acpi/processor.h> 1678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#include "internal.h" 1878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 1978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#define PREFIX "ACPI: " 2078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang#define _COMPONENT ACPI_PROCESSOR_COMPONENT 214d5d4cd88c542ff56cf7feacd29cc907f2abbfbbAlex ChiangACPI_MODULE_NAME("processor_core"); 2278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 236430c9c12a7dbb8f60f0d8294b73b3c0bb03f64fJan Beulichstatic int __init set_no_mwait(const struct dmi_system_id *id) 2478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 2578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang printk(KERN_NOTICE PREFIX "%s detected - " 2678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang "disabling mwait for CPU C-states\n", id->ident); 27d18960494f65ca4fa0d67c865aaca99452070d15Thomas Renninger boot_option_idle_override = IDLE_NOMWAIT; 2878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return 0; 2978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 3078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 316430c9c12a7dbb8f60f0d8294b73b3c0bb03f64fJan Beulichstatic struct dmi_system_id __initdata processor_idle_dmi_table[] = { 3278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang { 3378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang set_no_mwait, "Extensa 5220", { 3478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), 3578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 3678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), 3778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, 3878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang {}, 3978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang}; 4078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 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{ 168932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming#ifdef CONFIG_SMP 16978ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int i; 170932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming#endif 17178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang int apic_id = -1; 17278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 17378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang apic_id = map_mat_entry(handle, type, acpi_id); 17478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (apic_id == -1) 17578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang apic_id = map_madt_entry(type, acpi_id); 176d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming if (apic_id == -1) { 177d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming /* 178d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * On UP processor, there is no _MAT or MADT table. 179d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * So above apic_id is always set to -1. 180d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * 181d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * BIOS may define multiple CPU handles even for UP processor. 182d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * For example, 183d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * 184d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Scope (_PR) 185d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * { 186d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Processor (CPU0, 0x00, 0x00000410, 0x06) {} 187d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Processor (CPU1, 0x01, 0x00000410, 0x06) {} 188d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Processor (CPU2, 0x02, 0x00000410, 0x06) {} 189d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Processor (CPU3, 0x03, 0x00000410, 0x06) {} 190d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * } 191d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * 192d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Ignores apic_id and always return 0 for CPU0's handle. 193d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming * Return -1 for other CPU's handle. 194d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming */ 195d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming if (acpi_id == 0) 196d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming return acpi_id; 197d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming else 198d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming return apic_id; 199d640113fe80e45ebd4a5b420b220d3f6bf37f682Lin Ming } 20078ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 201932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming#ifdef CONFIG_SMP 20278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang for_each_possible_cpu(i) { 20378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang if (cpu_physical_id(i) == apic_id) 20478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return i; 20578ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang } 206932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming#else 207932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming /* In UP kernel, only processor 0 is valid */ 208932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming if (apic_id == 0) 209932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming return apic_id; 210932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming#endif 21178ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang return -1; 21278ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang} 21378ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex ChiangEXPORT_SYMBOL_GPL(acpi_get_cpuid); 21478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 2156430c9c12a7dbb8f60f0d8294b73b3c0bb03f64fJan Beulichstatic bool __init processor_physically_present(acpi_handle handle) 2165d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang{ 2175d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang int cpuid, type; 2185d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang u32 acpi_id; 2195d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_status status; 2205d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_object_type acpi_type; 2215d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang unsigned long long tmp; 2225d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang union acpi_object object = { 0 }; 2235d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; 2245d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2255d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_get_type(handle, &acpi_type); 2265d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2275d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2285d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2295d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang switch (acpi_type) { 2305d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang case ACPI_TYPE_PROCESSOR: 2315d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_evaluate_object(handle, NULL, NULL, &buffer); 2325d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2335d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2345d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_id = object.processor.proc_id; 2355d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang break; 2365d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang case ACPI_TYPE_DEVICE: 2375d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp); 2385d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (ACPI_FAILURE(status)) 2395d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2405d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang acpi_id = tmp; 2415d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang break; 2425d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang default: 2435d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2445d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang } 2455d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2465d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0; 2475d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang cpuid = acpi_get_cpuid(handle, type, acpi_id); 2485d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 249932df7414336a00f45e5aec62724cf736b0bcfd4Lin Ming if (cpuid == -1) 2505d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return false; 2515d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 2525d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return true; 2535d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang} 25478ed8bd2944b6400f742306e5fe9d1b9b6bf18baAlex Chiang 255af10f941ab7807d8b0bb3c66e679d8a6bbbe7485Jan Beulichstatic void __cpuinit acpi_set_pdc_bits(u32 *buf) 25608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang{ 25708ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[0] = ACPI_PDC_REVISION_ID; 25808ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[1] = 1; 25908ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 26008ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang /* Enable coordination with firmware's _TSD info */ 26108ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang buf[2] = ACPI_PDC_SMP_T_SWCOORD; 2626c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang 2636c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang /* Twiddle arch-specific bits needed for _PDC */ 2646c5807d7bc7d051fce00863ffb98d36325501eb2Alex Chiang arch_acpi_set_pdc_bits(buf); 26508ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang} 26608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 267af10f941ab7807d8b0bb3c66e679d8a6bbbe7485Jan Beulichstatic struct acpi_object_list *__cpuinit acpi_processor_alloc_pdc(void) 268407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang{ 269407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang struct acpi_object_list *obj_list; 270407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang union acpi_object *obj; 271407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang u32 *buf; 272407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 273407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang /* allocate and initialize pdc. It will be used later. */ 274407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); 275407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!obj_list) { 276407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 2773b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 278407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 279407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 280407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); 281407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!obj) { 282407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 283407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj_list); 2843b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 285407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 286407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 287407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang buf = kmalloc(12, GFP_KERNEL); 288407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang if (!buf) { 289407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang printk(KERN_ERR "Memory allocation error\n"); 290407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj); 291407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang kfree(obj_list); 2923b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return NULL; 293407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang } 294407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 29508ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang acpi_set_pdc_bits(buf); 29608ea48a326d8030ef5b7fb02292faf5a53c95e0aAlex Chiang 297407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->type = ACPI_TYPE_BUFFER; 298407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->buffer.length = 12; 299407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj->buffer.pointer = (u8 *) buf; 300407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list->count = 1; 301407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang obj_list->pointer = obj; 302407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 3033b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return obj_list; 304407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang} 305407cd87c54e76c266245e8faef8dd4a84b7254feAlex Chiang 30678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang/* 30778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * _PDC is required for a BIOS-OS handshake for most of the newer 30878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * ACPI processor features. 30978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 310af10f941ab7807d8b0bb3c66e679d8a6bbbe7485Jan Beulichstatic int __cpuinit 311fa118564ed66f785f957d8230745b62e9244700dAlex Chiangacpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) 31278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 31378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang acpi_status status = AE_OK; 31478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 315d18960494f65ca4fa0d67c865aaca99452070d15Thomas Renninger if (boot_option_idle_override == IDLE_NOMWAIT) { 31678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang /* 31778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * If mwait is disabled for CPU C-states, the C2C3_FFH access 31878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * mode will be disabled in the parameter of _PDC object. 31978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * Of course C1_FFH access mode will also be disabled. 32078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 32178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang union acpi_object *obj; 32278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang u32 *buffer = NULL; 32378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 32478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang obj = pdc_in->pointer; 32578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang buffer = (u32 *)(obj->buffer.pointer); 32678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); 32778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 32878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang } 329fa118564ed66f785f957d8230745b62e9244700dAlex Chiang status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); 33078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 33178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang if (ACPI_FAILURE(status)) 33278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang ACPI_DEBUG_PRINT((ACPI_DB_INFO, 33378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang "Could not evaluate _PDC, using legacy perf. control.\n")); 33478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 33578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return status; 33678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 33778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 338af10f941ab7807d8b0bb3c66e679d8a6bbbe7485Jan Beulichvoid __cpuinit acpi_processor_set_pdc(acpi_handle handle) 33978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 3403b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang struct acpi_object_list *obj_list; 3413b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang 3421d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang if (arch_has_acpi_pdc() == false) 3431d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang return; 3441d9cb470a755409ce97c3376174b1e234bd20371Alex Chiang 3453b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang obj_list = acpi_processor_alloc_pdc(); 3463b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang if (!obj_list) 3473b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang return; 3483b407aef573b82139c3bc4dcaad2731fad56c054Alex Chiang 34943bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiang acpi_processor_eval_pdc(handle, obj_list); 350b9c2db783456bcbce31e2482214cd337528db295Alex Chiang 351b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list->pointer->buffer.pointer); 352b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list->pointer); 353b9c2db783456bcbce31e2482214cd337528db295Alex Chiang kfree(obj_list); 35478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 35578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 3566430c9c12a7dbb8f60f0d8294b73b3c0bb03f64fJan Beulichstatic acpi_status __init 35778f1699659963fff97975df44db6d5dbe7218e55Alex Chiangearly_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv) 35878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 3595d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang if (processor_physically_present(handle) == false) 3605d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang return AE_OK; 3615d554a7bb0643a6151a84319bfeba8270bf5269eAlex Chiang 36243bab25ced218385f7e6a076c2459ea008cfd2e1Alex Chiang acpi_processor_set_pdc(handle); 36378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang return AE_OK; 36478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 36578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 3667a0b73a49ab56fb1e836675c00d6d0d2ba39a714Tony Luckvoid __init acpi_early_processor_set_pdc(void) 36778f1699659963fff97975df44db6d5dbe7218e55Alex Chiang{ 36878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang /* 36978f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * Check whether the system is DMI table. If yes, OSPM 37078f1699659963fff97975df44db6d5dbe7218e55Alex Chiang * should not use mwait for CPU-states. 37178f1699659963fff97975df44db6d5dbe7218e55Alex Chiang */ 37278f1699659963fff97975df44db6d5dbe7218e55Alex Chiang dmi_check_system(processor_idle_dmi_table); 37378f1699659963fff97975df44db6d5dbe7218e55Alex Chiang 37478f1699659963fff97975df44db6d5dbe7218e55Alex Chiang acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, 37578f1699659963fff97975df44db6d5dbe7218e55Alex Chiang ACPI_UINT32_MAX, 37678f1699659963fff97975df44db6d5dbe7218e55Alex Chiang early_init_pdc, NULL, NULL, NULL); 377c1e0ddbf0a97e1704d7f13b4934f9acca002402dYinghai Lu acpi_get_devices("ACPI0007", early_init_pdc, NULL, NULL); 37878f1699659963fff97975df44db6d5dbe7218e55Alex Chiang} 379