^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2005 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * - Added _PDC for platforms with Intel CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) "ACPI: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <acpi/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define _COMPONENT ACPI_PROCESSOR_COMPONENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) ACPI_MODULE_NAME("processor_pdc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static bool __init processor_physically_present(acpi_handle handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int cpuid, type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u32 acpi_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) acpi_object_type acpi_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned long long tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) union acpi_object object = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) status = acpi_get_type(handle, &acpi_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) switch (acpi_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) case ACPI_TYPE_PROCESSOR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) acpi_id = object.processor.proc_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case ACPI_TYPE_DEVICE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) acpi_id = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) cpuid = acpi_get_cpuid(handle, type, acpi_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return !invalid_logical_cpuid(cpuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static void acpi_set_pdc_bits(u32 *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) buf[0] = ACPI_PDC_REVISION_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) buf[1] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* Enable coordination with firmware's _TSD info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) buf[2] = ACPI_PDC_SMP_T_SWCOORD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Twiddle arch-specific bits needed for _PDC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) arch_acpi_set_pdc_bits(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static struct acpi_object_list *acpi_processor_alloc_pdc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct acpi_object_list *obj_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) union acpi_object *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) u32 *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* allocate and initialize pdc. It will be used later. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!obj_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) kfree(obj_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) buf = kmalloc(12, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (!buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) kfree(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) kfree(obj_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) acpi_set_pdc_bits(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) obj->type = ACPI_TYPE_BUFFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) obj->buffer.length = 12;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) obj->buffer.pointer = (u8 *) buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) obj_list->count = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) obj_list->pointer = obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return obj_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) pr_err("Memory allocation error\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * _PDC is required for a BIOS-OS handshake for most of the newer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * ACPI processor features.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) acpi_status status = AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (boot_option_idle_override == IDLE_NOMWAIT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * If mwait is disabled for CPU C-states, the C2C3_FFH access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * mode will be disabled in the parameter of _PDC object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * Of course C1_FFH access mode will also be disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) union acpi_object *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) u32 *buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) obj = pdc_in->pointer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) buffer = (u32 *)(obj->buffer.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ACPI_DEBUG_PRINT((ACPI_DB_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) "Could not evaluate _PDC, using legacy perf. control.\n"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) void acpi_processor_set_pdc(acpi_handle handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct acpi_object_list *obj_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (arch_has_acpi_pdc() == false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) obj_list = acpi_processor_alloc_pdc();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (!obj_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) acpi_processor_eval_pdc(handle, obj_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) kfree(obj_list->pointer->buffer.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) kfree(obj_list->pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) kfree(obj_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static acpi_status __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (processor_physically_present(handle) == false)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) acpi_processor_set_pdc(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int __init set_no_mwait(const struct dmi_system_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) pr_notice("%s detected - disabling mwait for CPU C-states\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) id->ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) boot_option_idle_override = IDLE_NOMWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static const struct dmi_system_id processor_idle_dmi_table[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) set_no_mwait, "Extensa 5220", {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static void __init processor_dmi_check(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * Check whether the system is DMI table. If yes, OSPM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * should not use mwait for CPU-states.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) dmi_check_system(processor_idle_dmi_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) void __init acpi_early_processor_set_pdc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) processor_dmi_check();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ACPI_UINT32_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) early_init_pdc, NULL, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) acpi_get_devices(ACPI_PROCESSOR_DEVICE_HID, early_init_pdc, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags