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@@ -1,383 +1,62 @@
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/*
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- * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $)
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+ * Copyright (C) 2005 Intel Corporation
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+ * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
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*
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- * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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- * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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- * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de>
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- * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
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- * - Added processor hotplug support
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- *
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- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or (at
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- * your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- * General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License along
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- * with this program; if not, write to the Free Software Foundation, Inc.,
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- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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- *
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- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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- * TBD:
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- * 1. Make # power states dynamic.
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- * 2. Support duty_cycle values that span bit 4.
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- * 3. Optimize by having scheduler determine business instead of
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- * having us try to calculate it here.
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- * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this.
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+ * Alex Chiang <achiang@hp.com>
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+ * - Unified x86/ia64 implementations
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+ * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
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+ * - Added _PDC for platforms with Intel CPUs
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*/
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-
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-#include <linux/kernel.h>
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-#include <linux/module.h>
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-#include <linux/init.h>
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-#include <linux/types.h>
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-#include <linux/pci.h>
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-#include <linux/pm.h>
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-#include <linux/cpufreq.h>
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-#include <linux/cpu.h>
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-#include <linux/proc_fs.h>
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-#include <linux/seq_file.h>
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#include <linux/dmi.h>
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-#include <linux/moduleparam.h>
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-#include <linux/cpuidle.h>
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-#include <asm/io.h>
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-#include <asm/system.h>
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-#include <asm/cpu.h>
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-#include <asm/delay.h>
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-#include <asm/uaccess.h>
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-#include <asm/processor.h>
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-#include <asm/smp.h>
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-#include <asm/acpi.h>
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-
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-#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/processor.h>
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-#define PREFIX "ACPI: "
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-
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-#define ACPI_PROCESSOR_CLASS "processor"
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-#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
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-#define ACPI_PROCESSOR_FILE_INFO "info"
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-#define ACPI_PROCESSOR_FILE_THROTTLING "throttling"
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-#define ACPI_PROCESSOR_FILE_LIMIT "limit"
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-#define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
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-#define ACPI_PROCESSOR_NOTIFY_POWER 0x81
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-#define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
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-
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-#define ACPI_PROCESSOR_LIMIT_USER 0
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-#define ACPI_PROCESSOR_LIMIT_THERMAL 1
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+#include "internal.h"
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+#define PREFIX "ACPI: "
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#define _COMPONENT ACPI_PROCESSOR_COMPONENT
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ACPI_MODULE_NAME("processor_core");
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-MODULE_AUTHOR("Paul Diefenbaugh");
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-MODULE_DESCRIPTION("ACPI Processor Driver");
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-MODULE_LICENSE("GPL");
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-
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-static int acpi_processor_add(struct acpi_device *device);
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-static int acpi_processor_remove(struct acpi_device *device, int type);
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-#ifdef CONFIG_ACPI_PROCFS
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-static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
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-#endif
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-static void acpi_processor_notify(struct acpi_device *device, u32 event);
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-static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
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-static int acpi_processor_handle_eject(struct acpi_processor *pr);
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-
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-
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-static const struct acpi_device_id processor_device_ids[] = {
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- {ACPI_PROCESSOR_OBJECT_HID, 0},
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- {"ACPI0007", 0},
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- {"", 0},
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-};
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-MODULE_DEVICE_TABLE(acpi, processor_device_ids);
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-
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-static struct acpi_driver acpi_processor_driver = {
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- .name = "processor",
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- .class = ACPI_PROCESSOR_CLASS,
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- .ids = processor_device_ids,
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- .ops = {
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- .add = acpi_processor_add,
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- .remove = acpi_processor_remove,
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- .suspend = acpi_processor_suspend,
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- .resume = acpi_processor_resume,
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- .notify = acpi_processor_notify,
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- },
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-};
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-
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-#define INSTALL_NOTIFY_HANDLER 1
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-#define UNINSTALL_NOTIFY_HANDLER 2
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-#ifdef CONFIG_ACPI_PROCFS
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-static const struct file_operations acpi_processor_info_fops = {
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- .owner = THIS_MODULE,
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- .open = acpi_processor_info_open_fs,
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- .read = seq_read,
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- .llseek = seq_lseek,
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- .release = single_release,
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-};
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-#endif
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-
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-DEFINE_PER_CPU(struct acpi_processor *, processors);
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-EXPORT_PER_CPU_SYMBOL(processors);
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-
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-struct acpi_processor_errata errata __read_mostly;
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-
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-/* --------------------------------------------------------------------------
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- Errata Handling
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- -------------------------------------------------------------------------- */
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-
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-static int acpi_processor_errata_piix4(struct pci_dev *dev)
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+static int set_no_mwait(const struct dmi_system_id *id)
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{
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- u8 value1 = 0;
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- u8 value2 = 0;
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-
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-
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- if (!dev)
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- return -EINVAL;
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-
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- /*
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- * Note that 'dev' references the PIIX4 ACPI Controller.
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- */
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-
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- switch (dev->revision) {
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- case 0:
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n"));
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- break;
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- case 1:
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n"));
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- break;
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- case 2:
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n"));
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- break;
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- case 3:
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n"));
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- break;
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- default:
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n"));
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- break;
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- }
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-
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- switch (dev->revision) {
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-
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- case 0: /* PIIX4 A-step */
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- case 1: /* PIIX4 B-step */
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- /*
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- * See specification changes #13 ("Manual Throttle Duty Cycle")
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- * and #14 ("Enabling and Disabling Manual Throttle"), plus
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- * erratum #5 ("STPCLK# Deassertion Time") from the January
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- * 2002 PIIX4 specification update. Applies to only older
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- * PIIX4 models.
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- */
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- errata.piix4.throttle = 1;
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-
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- case 2: /* PIIX4E */
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- case 3: /* PIIX4M */
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- /*
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- * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA
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- * Livelock") from the January 2002 PIIX4 specification update.
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- * Applies to all PIIX4 models.
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- */
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-
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- /*
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- * BM-IDE
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- * ------
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- * Find the PIIX4 IDE Controller and get the Bus Master IDE
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- * Status register address. We'll use this later to read
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- * each IDE controller's DMA status to make sure we catch all
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- * DMA activity.
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- */
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- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
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- PCI_DEVICE_ID_INTEL_82371AB,
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- PCI_ANY_ID, PCI_ANY_ID, NULL);
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- if (dev) {
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- errata.piix4.bmisx = pci_resource_start(dev, 4);
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- pci_dev_put(dev);
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- }
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-
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- /*
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- * Type-F DMA
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- * ----------
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- * Find the PIIX4 ISA Controller and read the Motherboard
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- * DMA controller's status to see if Type-F (Fast) DMA mode
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- * is enabled (bit 7) on either channel. Note that we'll
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- * disable C3 support if this is enabled, as some legacy
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- * devices won't operate well if fast DMA is disabled.
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- */
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- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
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- PCI_DEVICE_ID_INTEL_82371AB_0,
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- PCI_ANY_ID, PCI_ANY_ID, NULL);
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- if (dev) {
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- pci_read_config_byte(dev, 0x76, &value1);
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- pci_read_config_byte(dev, 0x77, &value2);
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- if ((value1 & 0x80) || (value2 & 0x80))
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- errata.piix4.fdma = 1;
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- pci_dev_put(dev);
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- }
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-
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- break;
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- }
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-
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- if (errata.piix4.bmisx)
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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- "Bus master activity detection (BM-IDE) erratum enabled\n"));
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- if (errata.piix4.fdma)
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- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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- "Type-F DMA livelock erratum (C3 disabled)\n"));
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-
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+ printk(KERN_NOTICE PREFIX "%s detected - "
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+ "disabling mwait for CPU C-states\n", id->ident);
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+ idle_nomwait = 1;
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return 0;
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}
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-static int acpi_processor_errata(struct acpi_processor *pr)
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-{
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- int result = 0;
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- struct pci_dev *dev = NULL;
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-
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-
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- if (!pr)
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- return -EINVAL;
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-
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- /*
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- * PIIX4
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- */
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- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
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- PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID,
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- PCI_ANY_ID, NULL);
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- if (dev) {
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- result = acpi_processor_errata_piix4(dev);
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- pci_dev_put(dev);
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- }
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-
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- return result;
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-}
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-
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-/* --------------------------------------------------------------------------
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- FS Interface (/proc)
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- -------------------------------------------------------------------------- */
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-
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-#ifdef CONFIG_ACPI_PROCFS
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-static struct proc_dir_entry *acpi_processor_dir = NULL;
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-
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-static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset)
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-{
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- struct acpi_processor *pr = seq->private;
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-
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-
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- if (!pr)
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- goto end;
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-
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- seq_printf(seq, "processor id: %d\n"
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- "acpi id: %d\n"
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- "bus mastering control: %s\n"
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- "power management: %s\n"
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- "throttling control: %s\n"
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- "limit interface: %s\n",
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- pr->id,
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- pr->acpi_id,
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- pr->flags.bm_control ? "yes" : "no",
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- pr->flags.power ? "yes" : "no",
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- pr->flags.throttling ? "yes" : "no",
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- pr->flags.limit ? "yes" : "no");
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-
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- end:
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- return 0;
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-}
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-
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-static int acpi_processor_info_open_fs(struct inode *inode, struct file *file)
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-{
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- return single_open(file, acpi_processor_info_seq_show,
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- PDE(inode)->data);
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-}
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-
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-static int __cpuinit acpi_processor_add_fs(struct acpi_device *device)
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-{
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- struct proc_dir_entry *entry = NULL;
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-
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-
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- if (!acpi_device_dir(device)) {
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- acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
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- acpi_processor_dir);
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- if (!acpi_device_dir(device))
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- return -ENODEV;
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- }
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-
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- /* 'info' [R] */
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- entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO,
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- S_IRUGO, acpi_device_dir(device),
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- &acpi_processor_info_fops,
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- acpi_driver_data(device));
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- if (!entry)
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- return -EIO;
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-
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- /* 'throttling' [R/W] */
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- entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING,
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- S_IFREG | S_IRUGO | S_IWUSR,
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- acpi_device_dir(device),
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- &acpi_processor_throttling_fops,
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- acpi_driver_data(device));
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- if (!entry)
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- return -EIO;
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-
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- /* 'limit' [R/W] */
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- entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT,
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- S_IFREG | S_IRUGO | S_IWUSR,
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- acpi_device_dir(device),
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- &acpi_processor_limit_fops,
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- acpi_driver_data(device));
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- if (!entry)
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- return -EIO;
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- return 0;
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-}
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-static int acpi_processor_remove_fs(struct acpi_device *device)
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-{
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-
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- if (acpi_device_dir(device)) {
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- remove_proc_entry(ACPI_PROCESSOR_FILE_INFO,
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- acpi_device_dir(device));
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- remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING,
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- acpi_device_dir(device));
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- remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT,
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- acpi_device_dir(device));
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- remove_proc_entry(acpi_device_bid(device), acpi_processor_dir);
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- acpi_device_dir(device) = NULL;
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- }
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-
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- return 0;
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-}
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-#else
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-static inline int acpi_processor_add_fs(struct acpi_device *device)
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-{
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- return 0;
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-}
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-static inline int acpi_processor_remove_fs(struct acpi_device *device)
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-{
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- return 0;
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-}
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-#endif
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-
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-/* Use the acpiid in MADT to map cpus in case of SMP */
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-
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-#ifndef CONFIG_SMP
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-static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; }
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-#else
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-
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-static struct acpi_table_madt *madt;
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+static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
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+ {
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+ set_no_mwait, "IFL91 board", {
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+ DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
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+ DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"),
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+ DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL},
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+ {
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+ set_no_mwait, "Extensa 5220", {
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+ DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
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+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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|
|
+ 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) &&
|
|
|
- lapic->processor_id == acpi_id) {
|
|
|
- *apic_id = lapic->id;
|
|
|
- return 1;
|
|
|
- }
|
|
|
- return 0;
|
|
|
+
|
|
|
+ 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,
|
|
|
@@ -385,22 +64,16 @@ static int map_x2apic_id(struct acpi_subtable_header *entry,
|
|
|
{
|
|
|
struct acpi_madt_local_x2apic *apic =
|
|
|
(struct acpi_madt_local_x2apic *)entry;
|
|
|
- u32 tmp = apic->local_apic_id;
|
|
|
|
|
|
- /* Only check enabled APICs*/
|
|
|
if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
|
|
|
return 0;
|
|
|
|
|
|
- /* Device statement declaration type */
|
|
|
- if (device_declaration) {
|
|
|
- if (apic->uid == acpi_id)
|
|
|
- goto found;
|
|
|
+ if (device_declaration && (apic->uid == acpi_id)) {
|
|
|
+ *apic_id = apic->local_apic_id;
|
|
|
+ return 1;
|
|
|
}
|
|
|
|
|
|
return 0;
|
|
|
-found:
|
|
|
- *apic_id = tmp;
|
|
|
- return 1;
|
|
|
}
|
|
|
|
|
|
static int map_lsapic_id(struct acpi_subtable_header *entry,
|
|
|
@@ -408,35 +81,34 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
|
|
|
{
|
|
|
struct acpi_madt_local_sapic *lsapic =
|
|
|
(struct acpi_madt_local_sapic *)entry;
|
|
|
- u32 tmp = (lsapic->id << 8) | lsapic->eid;
|
|
|
|
|
|
- /* Only check enabled APICs*/
|
|
|
if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
|
|
|
return 0;
|
|
|
|
|
|
- /* Device statement declaration type */
|
|
|
if (device_declaration) {
|
|
|
- if (entry->length < 16)
|
|
|
- printk(KERN_ERR PREFIX
|
|
|
- "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
|
|
|
- tmp);
|
|
|
- else if (lsapic->uid == acpi_id)
|
|
|
- goto found;
|
|
|
- /* Processor statement declaration type */
|
|
|
- } else if (lsapic->processor_id == acpi_id)
|
|
|
- goto found;
|
|
|
+ if ((entry->length < 16) || (lsapic->uid != acpi_id))
|
|
|
+ return 0;
|
|
|
+ } else if (lsapic->processor_id != acpi_id)
|
|
|
+ return 0;
|
|
|
|
|
|
- return 0;
|
|
|
-found:
|
|
|
- *apic_id = tmp;
|
|
|
+ *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;
|
|
|
|
|
|
@@ -496,7 +168,7 @@ exit:
|
|
|
return apic_id;
|
|
|
}
|
|
|
|
|
|
-static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id)
|
|
|
+int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
|
|
|
{
|
|
|
int i;
|
|
|
int apic_id = -1;
|
|
|
@@ -513,630 +185,170 @@ static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id)
|
|
|
}
|
|
|
return -1;
|
|
|
}
|
|
|
+EXPORT_SYMBOL_GPL(acpi_get_cpuid);
|
|
|
#endif
|
|
|
|
|
|
-/* --------------------------------------------------------------------------
|
|
|
- Driver Interface
|
|
|
- -------------------------------------------------------------------------- */
|
|
|
-
|
|
|
-static int acpi_processor_get_info(struct acpi_device *device)
|
|
|
+static bool processor_physically_present(acpi_handle handle)
|
|
|
{
|
|
|
- acpi_status status = 0;
|
|
|
+ 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 };
|
|
|
- struct acpi_processor *pr;
|
|
|
- int cpu_index, device_declaration = 0;
|
|
|
- static int cpu0_initialized;
|
|
|
-
|
|
|
- pr = acpi_driver_data(device);
|
|
|
- if (!pr)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- if (num_online_cpus() > 1)
|
|
|
- errata.smp = TRUE;
|
|
|
-
|
|
|
- acpi_processor_errata(pr);
|
|
|
-
|
|
|
- /*
|
|
|
- * Check to see if we have bus mastering arbitration control. This
|
|
|
- * is required for proper C3 usage (to maintain cache coherency).
|
|
|
- */
|
|
|
- if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) {
|
|
|
- pr->flags.bm_control = 1;
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "Bus mastering arbitration control present\n"));
|
|
|
- } else
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "No bus mastering arbitration control\n"));
|
|
|
-
|
|
|
- if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) {
|
|
|
- /* Declared with "Processor" statement; match ProcessorID */
|
|
|
- status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
|
|
|
- if (ACPI_FAILURE(status)) {
|
|
|
- printk(KERN_ERR PREFIX "Evaluating processor object\n");
|
|
|
- return -ENODEV;
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
|
|
|
- * >>> 'acpi_get_processor_id(acpi_id, &id)' in
|
|
|
- * arch/xxx/acpi.c
|
|
|
- */
|
|
|
- pr->acpi_id = object.processor.proc_id;
|
|
|
- } else {
|
|
|
- /*
|
|
|
- * Declared with "Device" statement; match _UID.
|
|
|
- * Note that we don't handle string _UIDs yet.
|
|
|
- */
|
|
|
- unsigned long long value;
|
|
|
- status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
|
|
|
- NULL, &value);
|
|
|
- if (ACPI_FAILURE(status)) {
|
|
|
- printk(KERN_ERR PREFIX
|
|
|
- "Evaluating processor _UID [%#x]\n", status);
|
|
|
- return -ENODEV;
|
|
|
- }
|
|
|
- device_declaration = 1;
|
|
|
- pr->acpi_id = value;
|
|
|
- }
|
|
|
- cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id);
|
|
|
-
|
|
|
- /* Handle UP system running SMP kernel, with no LAPIC in MADT */
|
|
|
- if (!cpu0_initialized && (cpu_index == -1) &&
|
|
|
- (num_online_cpus() == 1)) {
|
|
|
- cpu_index = 0;
|
|
|
- }
|
|
|
-
|
|
|
- cpu0_initialized = 1;
|
|
|
-
|
|
|
- pr->id = cpu_index;
|
|
|
-
|
|
|
- /*
|
|
|
- * Extra Processor objects may be enumerated on MP systems with
|
|
|
- * less than the max # of CPUs. They should be ignored _iff
|
|
|
- * they are physically not present.
|
|
|
- */
|
|
|
- if (pr->id == -1) {
|
|
|
- if (ACPI_FAILURE
|
|
|
- (acpi_processor_hotadd_init(pr->handle, &pr->id))) {
|
|
|
- return -ENODEV;
|
|
|
- }
|
|
|
- }
|
|
|
- /*
|
|
|
- * On some boxes several processors use the same processor bus id.
|
|
|
- * But they are located in different scope. For example:
|
|
|
- * \_SB.SCK0.CPU0
|
|
|
- * \_SB.SCK1.CPU0
|
|
|
- * Rename the processor device bus id. And the new bus id will be
|
|
|
- * generated as the following format:
|
|
|
- * CPU+CPU ID.
|
|
|
- */
|
|
|
- sprintf(acpi_device_bid(device), "CPU%X", pr->id);
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id,
|
|
|
- pr->acpi_id));
|
|
|
-
|
|
|
- if (!object.processor.pblk_address)
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n"));
|
|
|
- else if (object.processor.pblk_length != 6)
|
|
|
- printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n",
|
|
|
- object.processor.pblk_length);
|
|
|
- else {
|
|
|
- pr->throttling.address = object.processor.pblk_address;
|
|
|
- pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset;
|
|
|
- pr->throttling.duty_width = acpi_gbl_FADT.duty_width;
|
|
|
-
|
|
|
- pr->pblk = object.processor.pblk_address;
|
|
|
-
|
|
|
- /*
|
|
|
- * We don't care about error returns - we just try to mark
|
|
|
- * these reserved so that nobody else is confused into thinking
|
|
|
- * that this region might be unused..
|
|
|
- *
|
|
|
- * (In particular, allocating the IO range for Cardbus)
|
|
|
- */
|
|
|
- request_region(pr->throttling.address, 6, "ACPI CPU throttle");
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- * If ACPI describes a slot number for this CPU, we can use it
|
|
|
- * ensure we get the right value in the "physical id" field
|
|
|
- * of /proc/cpuinfo
|
|
|
- */
|
|
|
- status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer);
|
|
|
- if (ACPI_SUCCESS(status))
|
|
|
- arch_fix_phys_package_id(pr->id, object.integer.value);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static DEFINE_PER_CPU(void *, processor_device_array);
|
|
|
-
|
|
|
-static void acpi_processor_notify(struct acpi_device *device, u32 event)
|
|
|
-{
|
|
|
- struct acpi_processor *pr = acpi_driver_data(device);
|
|
|
- int saved;
|
|
|
-
|
|
|
- if (!pr)
|
|
|
- return;
|
|
|
|
|
|
- switch (event) {
|
|
|
- case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
|
|
|
- saved = pr->performance_platform_limit;
|
|
|
- acpi_processor_ppc_has_changed(pr, 1);
|
|
|
- if (saved == pr->performance_platform_limit)
|
|
|
- break;
|
|
|
- acpi_bus_generate_proc_event(device, event,
|
|
|
- pr->performance_platform_limit);
|
|
|
- acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
|
- dev_name(&device->dev), event,
|
|
|
- pr->performance_platform_limit);
|
|
|
+ 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_PROCESSOR_NOTIFY_POWER:
|
|
|
- acpi_processor_cst_has_changed(pr);
|
|
|
- acpi_bus_generate_proc_event(device, event, 0);
|
|
|
- acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
|
- dev_name(&device->dev), event, 0);
|
|
|
+ case ACPI_TYPE_DEVICE:
|
|
|
+ status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
|
|
|
+ if (ACPI_FAILURE(status))
|
|
|
+ return false;
|
|
|
+ acpi_id = tmp;
|
|
|
break;
|
|
|
- case ACPI_PROCESSOR_NOTIFY_THROTTLING:
|
|
|
- acpi_processor_tstate_has_changed(pr);
|
|
|
- acpi_bus_generate_proc_event(device, event, 0);
|
|
|
- acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
|
- dev_name(&device->dev), event, 0);
|
|
|
default:
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "Unsupported event [0x%x]\n", event));
|
|
|
- break;
|
|
|
+ return false;
|
|
|
}
|
|
|
|
|
|
- return;
|
|
|
-}
|
|
|
+ type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
|
|
|
+ cpuid = acpi_get_cpuid(handle, type, acpi_id);
|
|
|
|
|
|
-static int acpi_cpu_soft_notify(struct notifier_block *nfb,
|
|
|
- unsigned long action, void *hcpu)
|
|
|
-{
|
|
|
- unsigned int cpu = (unsigned long)hcpu;
|
|
|
- struct acpi_processor *pr = per_cpu(processors, cpu);
|
|
|
+ if (cpuid == -1)
|
|
|
+ return false;
|
|
|
|
|
|
- if (action == CPU_ONLINE && pr) {
|
|
|
- acpi_processor_ppc_has_changed(pr, 0);
|
|
|
- acpi_processor_cst_has_changed(pr);
|
|
|
- acpi_processor_tstate_has_changed(pr);
|
|
|
- }
|
|
|
- return NOTIFY_OK;
|
|
|
+ return true;
|
|
|
}
|
|
|
|
|
|
-static struct notifier_block acpi_cpu_notifier =
|
|
|
+static void acpi_set_pdc_bits(u32 *buf)
|
|
|
{
|
|
|
- .notifier_call = acpi_cpu_soft_notify,
|
|
|
-};
|
|
|
-
|
|
|
-static int __cpuinit acpi_processor_add(struct acpi_device *device)
|
|
|
-{
|
|
|
- struct acpi_processor *pr = NULL;
|
|
|
- int result = 0;
|
|
|
- struct sys_device *sysdev;
|
|
|
-
|
|
|
- pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
|
|
|
- if (!pr)
|
|
|
- return -ENOMEM;
|
|
|
-
|
|
|
- if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) {
|
|
|
- kfree(pr);
|
|
|
- return -ENOMEM;
|
|
|
- }
|
|
|
-
|
|
|
- pr->handle = device->handle;
|
|
|
- strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
|
|
|
- strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
|
|
|
- device->driver_data = pr;
|
|
|
-
|
|
|
- result = acpi_processor_get_info(device);
|
|
|
- if (result) {
|
|
|
- /* Processor is physically not present */
|
|
|
- return 0;
|
|
|
- }
|
|
|
-
|
|
|
- BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0));
|
|
|
-
|
|
|
- /*
|
|
|
- * Buggy BIOS check
|
|
|
- * ACPI id of processors can be reported wrongly by the BIOS.
|
|
|
- * Don't trust it blindly
|
|
|
- */
|
|
|
- if (per_cpu(processor_device_array, pr->id) != NULL &&
|
|
|
- per_cpu(processor_device_array, pr->id) != device) {
|
|
|
- printk(KERN_WARNING "BIOS reported wrong ACPI id "
|
|
|
- "for the processor\n");
|
|
|
- result = -ENODEV;
|
|
|
- goto err_free_cpumask;
|
|
|
- }
|
|
|
- per_cpu(processor_device_array, pr->id) = device;
|
|
|
+ buf[0] = ACPI_PDC_REVISION_ID;
|
|
|
+ buf[1] = 1;
|
|
|
|
|
|
- per_cpu(processors, pr->id) = pr;
|
|
|
+ /* Enable coordination with firmware's _TSD info */
|
|
|
+ buf[2] = ACPI_PDC_SMP_T_SWCOORD;
|
|
|
|
|
|
- result = acpi_processor_add_fs(device);
|
|
|
- if (result)
|
|
|
- goto err_free_cpumask;
|
|
|
-
|
|
|
- sysdev = get_cpu_sysdev(pr->id);
|
|
|
- if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) {
|
|
|
- result = -EFAULT;
|
|
|
- goto err_remove_fs;
|
|
|
- }
|
|
|
-
|
|
|
- /* _PDC call should be done before doing anything else (if reqd.). */
|
|
|
- acpi_processor_set_pdc(pr->handle);
|
|
|
-
|
|
|
-#ifdef CONFIG_CPU_FREQ
|
|
|
- acpi_processor_ppc_has_changed(pr, 0);
|
|
|
-#endif
|
|
|
- acpi_processor_get_throttling_info(pr);
|
|
|
- acpi_processor_get_limit_info(pr);
|
|
|
-
|
|
|
-
|
|
|
- acpi_processor_power_init(pr, device);
|
|
|
-
|
|
|
- pr->cdev = thermal_cooling_device_register("Processor", device,
|
|
|
- &processor_cooling_ops);
|
|
|
- if (IS_ERR(pr->cdev)) {
|
|
|
- result = PTR_ERR(pr->cdev);
|
|
|
- goto err_power_exit;
|
|
|
- }
|
|
|
-
|
|
|
- dev_dbg(&device->dev, "registered as cooling_device%d\n",
|
|
|
- pr->cdev->id);
|
|
|
-
|
|
|
- result = sysfs_create_link(&device->dev.kobj,
|
|
|
- &pr->cdev->device.kobj,
|
|
|
- "thermal_cooling");
|
|
|
- if (result) {
|
|
|
- printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
|
- goto err_thermal_unregister;
|
|
|
- }
|
|
|
- result = sysfs_create_link(&pr->cdev->device.kobj,
|
|
|
- &device->dev.kobj,
|
|
|
- "device");
|
|
|
- if (result) {
|
|
|
- printk(KERN_ERR PREFIX "Create sysfs link\n");
|
|
|
- goto err_remove_sysfs;
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-
|
|
|
-err_remove_sysfs:
|
|
|
- sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
|
|
|
-err_thermal_unregister:
|
|
|
- thermal_cooling_device_unregister(pr->cdev);
|
|
|
-err_power_exit:
|
|
|
- acpi_processor_power_exit(pr, device);
|
|
|
-err_remove_fs:
|
|
|
- acpi_processor_remove_fs(device);
|
|
|
-err_free_cpumask:
|
|
|
- free_cpumask_var(pr->throttling.shared_cpu_map);
|
|
|
-
|
|
|
- return result;
|
|
|
+ /* Twiddle arch-specific bits needed for _PDC */
|
|
|
+ arch_acpi_set_pdc_bits(buf);
|
|
|
}
|
|
|
|
|
|
-static int acpi_processor_remove(struct acpi_device *device, int type)
|
|
|
+static struct acpi_object_list *acpi_processor_alloc_pdc(void)
|
|
|
{
|
|
|
- struct acpi_processor *pr = NULL;
|
|
|
-
|
|
|
-
|
|
|
- if (!device || !acpi_driver_data(device))
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- pr = acpi_driver_data(device);
|
|
|
-
|
|
|
- if (pr->id >= nr_cpu_ids)
|
|
|
- goto free;
|
|
|
+ struct acpi_object_list *obj_list;
|
|
|
+ union acpi_object *obj;
|
|
|
+ u32 *buf;
|
|
|
|
|
|
- if (type == ACPI_BUS_REMOVAL_EJECT) {
|
|
|
- if (acpi_processor_handle_eject(pr))
|
|
|
- return -EINVAL;
|
|
|
+ /* 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;
|
|
|
}
|
|
|
|
|
|
- acpi_processor_power_exit(pr, device);
|
|
|
-
|
|
|
- sysfs_remove_link(&device->dev.kobj, "sysdev");
|
|
|
-
|
|
|
- acpi_processor_remove_fs(device);
|
|
|
-
|
|
|
- if (pr->cdev) {
|
|
|
- sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
|
|
|
- sysfs_remove_link(&pr->cdev->device.kobj, "device");
|
|
|
- thermal_cooling_device_unregister(pr->cdev);
|
|
|
- pr->cdev = NULL;
|
|
|
+ obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
|
|
|
+ if (!obj) {
|
|
|
+ printk(KERN_ERR "Memory allocation error\n");
|
|
|
+ kfree(obj_list);
|
|
|
+ return NULL;
|
|
|
}
|
|
|
|
|
|
- per_cpu(processors, pr->id) = NULL;
|
|
|
- per_cpu(processor_device_array, pr->id) = NULL;
|
|
|
-
|
|
|
-free:
|
|
|
- free_cpumask_var(pr->throttling.shared_cpu_map);
|
|
|
- kfree(pr);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
|
|
|
-/****************************************************************************
|
|
|
- * Acpi processor hotplug support *
|
|
|
- ****************************************************************************/
|
|
|
-
|
|
|
-static int is_processor_present(acpi_handle handle)
|
|
|
-{
|
|
|
- acpi_status status;
|
|
|
- unsigned long long sta = 0;
|
|
|
-
|
|
|
-
|
|
|
- status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
|
|
|
-
|
|
|
- if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT))
|
|
|
- return 1;
|
|
|
-
|
|
|
- /*
|
|
|
- * _STA is mandatory for a processor that supports hot plug
|
|
|
- */
|
|
|
- if (status == AE_NOT_FOUND)
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "Processor does not support hot plug\n"));
|
|
|
- else
|
|
|
- ACPI_EXCEPTION((AE_INFO, status,
|
|
|
- "Processor Device is not present"));
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static
|
|
|
-int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
|
|
|
-{
|
|
|
- acpi_handle phandle;
|
|
|
- struct acpi_device *pdev;
|
|
|
-
|
|
|
-
|
|
|
- if (acpi_get_parent(handle, &phandle)) {
|
|
|
- return -ENODEV;
|
|
|
+ buf = kmalloc(12, GFP_KERNEL);
|
|
|
+ if (!buf) {
|
|
|
+ printk(KERN_ERR "Memory allocation error\n");
|
|
|
+ kfree(obj);
|
|
|
+ kfree(obj_list);
|
|
|
+ return NULL;
|
|
|
}
|
|
|
|
|
|
- if (acpi_bus_get_device(phandle, &pdev)) {
|
|
|
- return -ENODEV;
|
|
|
- }
|
|
|
+ acpi_set_pdc_bits(buf);
|
|
|
|
|
|
- if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) {
|
|
|
- return -ENODEV;
|
|
|
- }
|
|
|
+ obj->type = ACPI_TYPE_BUFFER;
|
|
|
+ obj->buffer.length = 12;
|
|
|
+ obj->buffer.pointer = (u8 *) buf;
|
|
|
+ obj_list->count = 1;
|
|
|
+ obj_list->pointer = obj;
|
|
|
|
|
|
- return 0;
|
|
|
+ return obj_list;
|
|
|
}
|
|
|
|
|
|
-static void __ref acpi_processor_hotplug_notify(acpi_handle handle,
|
|
|
- u32 event, void *data)
|
|
|
+/*
|
|
|
+ * _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)
|
|
|
{
|
|
|
- struct acpi_processor *pr;
|
|
|
- struct acpi_device *device = NULL;
|
|
|
- int result;
|
|
|
-
|
|
|
+ acpi_status status = AE_OK;
|
|
|
|
|
|
- switch (event) {
|
|
|
- case ACPI_NOTIFY_BUS_CHECK:
|
|
|
- case ACPI_NOTIFY_DEVICE_CHECK:
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "Processor driver received %s event\n",
|
|
|
- (event == ACPI_NOTIFY_BUS_CHECK) ?
|
|
|
- "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
|
|
|
-
|
|
|
- if (!is_processor_present(handle))
|
|
|
- break;
|
|
|
+ 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;
|
|
|
|
|
|
- if (acpi_bus_get_device(handle, &device)) {
|
|
|
- result = acpi_processor_device_add(handle, &device);
|
|
|
- if (result)
|
|
|
- printk(KERN_ERR PREFIX
|
|
|
- "Unable to add the device\n");
|
|
|
- break;
|
|
|
- }
|
|
|
- break;
|
|
|
- case ACPI_NOTIFY_EJECT_REQUEST:
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "received ACPI_NOTIFY_EJECT_REQUEST\n"));
|
|
|
+ obj = pdc_in->pointer;
|
|
|
+ buffer = (u32 *)(obj->buffer.pointer);
|
|
|
+ buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
|
|
|
|
|
|
- if (acpi_bus_get_device(handle, &device)) {
|
|
|
- printk(KERN_ERR PREFIX
|
|
|
- "Device don't exist, dropping EJECT\n");
|
|
|
- break;
|
|
|
- }
|
|
|
- pr = acpi_driver_data(device);
|
|
|
- if (!pr) {
|
|
|
- printk(KERN_ERR PREFIX
|
|
|
- "Driver data is NULL, dropping EJECT\n");
|
|
|
- return;
|
|
|
- }
|
|
|
- break;
|
|
|
- default:
|
|
|
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
- "Unsupported event [0x%x]\n", event));
|
|
|
- break;
|
|
|
}
|
|
|
+ status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
|
|
|
|
|
|
- return;
|
|
|
-}
|
|
|
-
|
|
|
-static acpi_status
|
|
|
-processor_walk_namespace_cb(acpi_handle handle,
|
|
|
- u32 lvl, void *context, void **rv)
|
|
|
-{
|
|
|
- acpi_status status;
|
|
|
- int *action = context;
|
|
|
- acpi_object_type type = 0;
|
|
|
-
|
|
|
- status = acpi_get_type(handle, &type);
|
|
|
if (ACPI_FAILURE(status))
|
|
|
- return (AE_OK);
|
|
|
-
|
|
|
- if (type != ACPI_TYPE_PROCESSOR)
|
|
|
- return (AE_OK);
|
|
|
-
|
|
|
- switch (*action) {
|
|
|
- case INSTALL_NOTIFY_HANDLER:
|
|
|
- acpi_install_notify_handler(handle,
|
|
|
- ACPI_SYSTEM_NOTIFY,
|
|
|
- acpi_processor_hotplug_notify,
|
|
|
- NULL);
|
|
|
- break;
|
|
|
- case UNINSTALL_NOTIFY_HANDLER:
|
|
|
- acpi_remove_notify_handler(handle,
|
|
|
- ACPI_SYSTEM_NOTIFY,
|
|
|
- acpi_processor_hotplug_notify);
|
|
|
- break;
|
|
|
- default:
|
|
|
- break;
|
|
|
- }
|
|
|
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
|
+ "Could not evaluate _PDC, using legacy perf. control.\n"));
|
|
|
|
|
|
- return (AE_OK);
|
|
|
+ return status;
|
|
|
}
|
|
|
|
|
|
-static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
|
|
|
+void acpi_processor_set_pdc(acpi_handle handle)
|
|
|
{
|
|
|
+ struct acpi_object_list *obj_list;
|
|
|
|
|
|
- if (!is_processor_present(handle)) {
|
|
|
- return AE_ERROR;
|
|
|
- }
|
|
|
+ if (arch_has_acpi_pdc() == false)
|
|
|
+ return;
|
|
|
|
|
|
- if (acpi_map_lsapic(handle, p_cpu))
|
|
|
- return AE_ERROR;
|
|
|
+ obj_list = acpi_processor_alloc_pdc();
|
|
|
+ if (!obj_list)
|
|
|
+ return;
|
|
|
|
|
|
- if (arch_register_cpu(*p_cpu)) {
|
|
|
- acpi_unmap_lsapic(*p_cpu);
|
|
|
- return AE_ERROR;
|
|
|
- }
|
|
|
+ acpi_processor_eval_pdc(handle, obj_list);
|
|
|
|
|
|
- return AE_OK;
|
|
|
+ kfree(obj_list->pointer->buffer.pointer);
|
|
|
+ kfree(obj_list->pointer);
|
|
|
+ kfree(obj_list);
|
|
|
}
|
|
|
+EXPORT_SYMBOL_GPL(acpi_processor_set_pdc);
|
|
|
|
|
|
-static int acpi_processor_handle_eject(struct acpi_processor *pr)
|
|
|
+static acpi_status
|
|
|
+early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
|
|
|
{
|
|
|
- if (cpu_online(pr->id))
|
|
|
- cpu_down(pr->id);
|
|
|
+ if (processor_physically_present(handle) == false)
|
|
|
+ return AE_OK;
|
|
|
|
|
|
- arch_unregister_cpu(pr->id);
|
|
|
- acpi_unmap_lsapic(pr->id);
|
|
|
- return (0);
|
|
|
-}
|
|
|
-#else
|
|
|
-static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
|
|
|
-{
|
|
|
- return AE_ERROR;
|
|
|
-}
|
|
|
-static int acpi_processor_handle_eject(struct acpi_processor *pr)
|
|
|
-{
|
|
|
- return (-EINVAL);
|
|
|
+ acpi_processor_set_pdc(handle);
|
|
|
+ return AE_OK;
|
|
|
}
|
|
|
-#endif
|
|
|
|
|
|
-static
|
|
|
-void acpi_processor_install_hotplug_notify(void)
|
|
|
+void __init acpi_early_processor_set_pdc(void)
|
|
|
{
|
|
|
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
|
|
|
- int action = INSTALL_NOTIFY_HANDLER;
|
|
|
- acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
|
|
|
- ACPI_ROOT_OBJECT,
|
|
|
- ACPI_UINT32_MAX,
|
|
|
- processor_walk_namespace_cb, NULL, &action, NULL);
|
|
|
-#endif
|
|
|
- register_hotcpu_notifier(&acpi_cpu_notifier);
|
|
|
-}
|
|
|
+ /*
|
|
|
+ * Check whether the system is DMI table. If yes, OSPM
|
|
|
+ * should not use mwait for CPU-states.
|
|
|
+ */
|
|
|
+ dmi_check_system(processor_idle_dmi_table);
|
|
|
|
|
|
-static
|
|
|
-void acpi_processor_uninstall_hotplug_notify(void)
|
|
|
-{
|
|
|
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
|
|
|
- int action = UNINSTALL_NOTIFY_HANDLER;
|
|
|
- acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
|
|
|
- ACPI_ROOT_OBJECT,
|
|
|
+ acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
|
|
|
ACPI_UINT32_MAX,
|
|
|
- processor_walk_namespace_cb, NULL, &action, NULL);
|
|
|
-#endif
|
|
|
- unregister_hotcpu_notifier(&acpi_cpu_notifier);
|
|
|
+ early_init_pdc, NULL, NULL, NULL);
|
|
|
}
|
|
|
-
|
|
|
-/*
|
|
|
- * We keep the driver loaded even when ACPI is not running.
|
|
|
- * This is needed for the powernow-k8 driver, that works even without
|
|
|
- * ACPI, but needs symbols from this driver
|
|
|
- */
|
|
|
-
|
|
|
-static int __init acpi_processor_init(void)
|
|
|
-{
|
|
|
- int result = 0;
|
|
|
-
|
|
|
- if (acpi_disabled)
|
|
|
- return 0;
|
|
|
-
|
|
|
- memset(&errata, 0, sizeof(errata));
|
|
|
-
|
|
|
-#ifdef CONFIG_SMP
|
|
|
- if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
|
|
|
- (struct acpi_table_header **)&madt)))
|
|
|
- madt = NULL;
|
|
|
-#endif
|
|
|
-#ifdef CONFIG_ACPI_PROCFS
|
|
|
- acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir);
|
|
|
- if (!acpi_processor_dir)
|
|
|
- return -ENOMEM;
|
|
|
-#endif
|
|
|
- result = cpuidle_register_driver(&acpi_idle_driver);
|
|
|
- if (result < 0)
|
|
|
- goto out_proc;
|
|
|
-
|
|
|
- result = acpi_bus_register_driver(&acpi_processor_driver);
|
|
|
- if (result < 0)
|
|
|
- goto out_cpuidle;
|
|
|
-
|
|
|
- acpi_processor_install_hotplug_notify();
|
|
|
-
|
|
|
- acpi_thermal_cpufreq_init();
|
|
|
-
|
|
|
- acpi_processor_ppc_init();
|
|
|
-
|
|
|
- acpi_processor_throttling_init();
|
|
|
-
|
|
|
- return 0;
|
|
|
-
|
|
|
-out_cpuidle:
|
|
|
- cpuidle_unregister_driver(&acpi_idle_driver);
|
|
|
-
|
|
|
-out_proc:
|
|
|
-#ifdef CONFIG_ACPI_PROCFS
|
|
|
- remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
|
|
|
-#endif
|
|
|
-
|
|
|
- return result;
|
|
|
-}
|
|
|
-
|
|
|
-static void __exit acpi_processor_exit(void)
|
|
|
-{
|
|
|
- if (acpi_disabled)
|
|
|
- return;
|
|
|
-
|
|
|
- acpi_processor_ppc_exit();
|
|
|
-
|
|
|
- acpi_thermal_cpufreq_exit();
|
|
|
-
|
|
|
- acpi_processor_uninstall_hotplug_notify();
|
|
|
-
|
|
|
- acpi_bus_unregister_driver(&acpi_processor_driver);
|
|
|
-
|
|
|
- cpuidle_unregister_driver(&acpi_idle_driver);
|
|
|
-
|
|
|
-#ifdef CONFIG_ACPI_PROCFS
|
|
|
- remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
|
|
|
-#endif
|
|
|
-
|
|
|
- return;
|
|
|
-}
|
|
|
-
|
|
|
-module_init(acpi_processor_init);
|
|
|
-module_exit(acpi_processor_exit);
|
|
|
-
|
|
|
-EXPORT_SYMBOL(acpi_processor_set_thermal_limit);
|
|
|
-
|
|
|
-MODULE_ALIAS("processor");
|
Linus Torvalds