[ACPI] enable SMP C-states on x86_64
http://bugzilla.kernel.org/show_bug.cgi?id=5653 Signed-off-by: David Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -4,5 +4,6 @@ obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup.o
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ifneq ($(CONFIG_ACPI_PROCESSOR),)
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obj-y += processor.o
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processor-y := ../../../i386/kernel/acpi/processor.o ../../../i386/kernel/acpi/cstate.o
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endif
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@ -1,72 +0,0 @@
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/*
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* arch/x86_64/kernel/acpi/processor.c
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*
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* Copyright (C) 2005 Intel Corporation
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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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#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/acpi.h>
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#include <acpi/processor.h>
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#include <asm/acpi.h>
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static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c)
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{
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struct acpi_object_list *obj_list;
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union acpi_object *obj;
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u32 *buf;
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/* allocate and initialize pdc. It will be used later. */
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obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
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if (!obj_list) {
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printk(KERN_ERR "Memory allocation error\n");
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return;
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}
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obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
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if (!obj) {
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printk(KERN_ERR "Memory allocation error\n");
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kfree(obj_list);
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return;
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}
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buf = kmalloc(12, GFP_KERNEL);
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if (!buf) {
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printk(KERN_ERR "Memory allocation error\n");
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kfree(obj);
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kfree(obj_list);
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return;
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}
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buf[0] = ACPI_PDC_REVISION_ID;
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buf[1] = 1;
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buf[2] = ACPI_PDC_EST_CAPABILITY_SMP;
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obj->type = ACPI_TYPE_BUFFER;
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obj->buffer.length = 12;
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obj->buffer.pointer = (u8 *) buf;
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obj_list->count = 1;
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obj_list->pointer = obj;
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pr->pdc = obj_list;
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return;
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}
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/* Initialize _PDC data based on the CPU vendor */
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void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
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{
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unsigned int cpu = pr->id;
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struct cpuinfo_x86 *c = cpu_data + cpu;
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pr->pdc = NULL;
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if (c->x86_vendor == X86_VENDOR_INTEL && cpu_has(c, X86_FEATURE_EST))
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init_intel_pdc(pr, c);
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return;
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}
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EXPORT_SYMBOL(arch_acpi_processor_init_pdc);
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@ -162,6 +162,8 @@ extern int acpi_pci_disabled;
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extern u8 x86_acpiid_to_apicid[];
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#define ARCH_HAS_POWER_INIT 1
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extern int acpi_skip_timer_override;
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#endif /*__KERNEL__*/
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