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![Sean Christopherson](/assets/img/avatar_default.png)
Convert acpi_wakeup_address from a raw variable into a function so that x86 can wrap its dereference of the real mode boot header in a function instead of broadcasting it to the world via a #define. This sets the stage for a future patch to move x86's definition of the new function, acpi_get_wakeup_address(), out of asm/acpi.h and thus break acpi.h's dependency on asm/realmode.h. No functional change intended. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Link: https://lkml.kernel.org/r/20191126165417.22423-12-sean.j.christopherson@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
908 lines
22 KiB
C
908 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* acpi.c - Architecture-Specific Low-Level ACPI Support
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Copyright (C) 2000 Intel Corp.
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* Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
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* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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* Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
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* Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
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* Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
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* Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/irq.h>
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/mmzone.h>
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#include <linux/nodemask.h>
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#include <linux/slab.h>
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#include <acpi/processor.h>
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#include <asm/io.h>
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#include <asm/iosapic.h>
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#include <asm/page.h>
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#include <asm/numa.h>
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#include <asm/sal.h>
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#include <asm/cyclone.h>
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#define PREFIX "ACPI: "
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int acpi_lapic;
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unsigned int acpi_cpei_override;
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unsigned int acpi_cpei_phys_cpuid;
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#define ACPI_MAX_PLATFORM_INTERRUPTS 256
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/* Array to record platform interrupt vectors for generic interrupt routing. */
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int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
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[0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
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};
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enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
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/*
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* Interrupt routing API for device drivers. Provides interrupt vector for
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* a generic platform event. Currently only CPEI is implemented.
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*/
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int acpi_request_vector(u32 int_type)
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{
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int vector = -1;
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if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
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/* corrected platform error interrupt */
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vector = platform_intr_list[int_type];
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} else
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printk(KERN_ERR
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"acpi_request_vector(): invalid interrupt type\n");
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return vector;
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}
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void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
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{
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return __va(phys);
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}
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void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
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{
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}
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/* --------------------------------------------------------------------------
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Boot-time Table Parsing
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-------------------------------------------------------------------------- */
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static int available_cpus __initdata;
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struct acpi_table_madt *acpi_madt __initdata;
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static u8 has_8259;
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static int __init
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acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
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const unsigned long end)
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{
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struct acpi_madt_local_apic_override *lapic;
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lapic = (struct acpi_madt_local_apic_override *)header;
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if (BAD_MADT_ENTRY(lapic, end))
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return -EINVAL;
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if (lapic->address) {
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iounmap(ipi_base_addr);
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ipi_base_addr = ioremap(lapic->address, 0);
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}
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return 0;
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}
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static int __init
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acpi_parse_lsapic(union acpi_subtable_headers *header, const unsigned long end)
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{
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struct acpi_madt_local_sapic *lsapic;
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lsapic = (struct acpi_madt_local_sapic *)header;
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/*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
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if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
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#ifdef CONFIG_SMP
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smp_boot_data.cpu_phys_id[available_cpus] =
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(lsapic->id << 8) | lsapic->eid;
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#endif
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++available_cpus;
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}
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total_cpus++;
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return 0;
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}
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static int __init
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acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
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{
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struct acpi_madt_local_apic_nmi *lacpi_nmi;
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lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
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if (BAD_MADT_ENTRY(lacpi_nmi, end))
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return -EINVAL;
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/* TBD: Support lapic_nmi entries */
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return 0;
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}
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static int __init
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acpi_parse_iosapic(union acpi_subtable_headers * header, const unsigned long end)
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{
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struct acpi_madt_io_sapic *iosapic;
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iosapic = (struct acpi_madt_io_sapic *)header;
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if (BAD_MADT_ENTRY(iosapic, end))
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return -EINVAL;
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return iosapic_init(iosapic->address, iosapic->global_irq_base);
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}
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static unsigned int __initdata acpi_madt_rev;
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static int __init
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acpi_parse_plat_int_src(union acpi_subtable_headers * header,
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const unsigned long end)
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{
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struct acpi_madt_interrupt_source *plintsrc;
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int vector;
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plintsrc = (struct acpi_madt_interrupt_source *)header;
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if (BAD_MADT_ENTRY(plintsrc, end))
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return -EINVAL;
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/*
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* Get vector assignment for this interrupt, set attributes,
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* and program the IOSAPIC routing table.
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*/
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vector = iosapic_register_platform_intr(plintsrc->type,
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plintsrc->global_irq,
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plintsrc->io_sapic_vector,
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plintsrc->eid,
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plintsrc->id,
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((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
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ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
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IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
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((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
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ACPI_MADT_TRIGGER_EDGE) ?
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IOSAPIC_EDGE : IOSAPIC_LEVEL);
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platform_intr_list[plintsrc->type] = vector;
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if (acpi_madt_rev > 1) {
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acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
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}
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/*
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* Save the physical id, so we can check when its being removed
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*/
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acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
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return 0;
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}
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#ifdef CONFIG_HOTPLUG_CPU
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unsigned int can_cpei_retarget(void)
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{
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extern int cpe_vector;
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extern unsigned int force_cpei_retarget;
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/*
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* Only if CPEI is supported and the override flag
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* is present, otherwise return that its re-targettable
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* if we are in polling mode.
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*/
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if (cpe_vector > 0) {
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if (acpi_cpei_override || force_cpei_retarget)
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return 1;
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else
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return 0;
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}
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return 1;
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}
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unsigned int is_cpu_cpei_target(unsigned int cpu)
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{
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unsigned int logical_id;
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logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
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if (logical_id == cpu)
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return 1;
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else
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return 0;
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}
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void set_cpei_target_cpu(unsigned int cpu)
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{
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acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
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}
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#endif
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unsigned int get_cpei_target_cpu(void)
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{
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return acpi_cpei_phys_cpuid;
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}
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static int __init
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acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
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const unsigned long end)
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{
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struct acpi_madt_interrupt_override *p;
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p = (struct acpi_madt_interrupt_override *)header;
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if (BAD_MADT_ENTRY(p, end))
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return -EINVAL;
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iosapic_override_isa_irq(p->source_irq, p->global_irq,
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((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
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ACPI_MADT_POLARITY_ACTIVE_LOW) ?
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IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
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((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
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ACPI_MADT_TRIGGER_LEVEL) ?
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IOSAPIC_LEVEL : IOSAPIC_EDGE);
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return 0;
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}
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static int __init
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acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
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{
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struct acpi_madt_nmi_source *nmi_src;
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nmi_src = (struct acpi_madt_nmi_source *)header;
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if (BAD_MADT_ENTRY(nmi_src, end))
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return -EINVAL;
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/* TBD: Support nimsrc entries */
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return 0;
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}
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static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
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/*
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* Unfortunately ITC_DRIFT is not yet part of the
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* official SAL spec, so the ITC_DRIFT bit is not
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* set by the BIOS on this hardware.
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*/
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sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
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cyclone_setup();
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}
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}
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static int __init acpi_parse_madt(struct acpi_table_header *table)
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{
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acpi_madt = (struct acpi_table_madt *)table;
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acpi_madt_rev = acpi_madt->header.revision;
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/* remember the value for reference after free_initmem() */
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#ifdef CONFIG_ITANIUM
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has_8259 = 1; /* Firmware on old Itanium systems is broken */
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#else
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has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
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#endif
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iosapic_system_init(has_8259);
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/* Get base address of IPI Message Block */
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if (acpi_madt->address)
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ipi_base_addr = ioremap(acpi_madt->address, 0);
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printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
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acpi_madt_oem_check(acpi_madt->header.oem_id,
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acpi_madt->header.oem_table_id);
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return 0;
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}
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#ifdef CONFIG_ACPI_NUMA
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#undef SLIT_DEBUG
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#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
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static int __initdata srat_num_cpus; /* number of cpus */
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static u32 pxm_flag[PXM_FLAG_LEN];
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#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
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#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
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static struct acpi_table_slit __initdata *slit_table;
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cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
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static int __init
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get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
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{
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int pxm;
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pxm = pa->proximity_domain_lo;
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if (acpi_srat_revision >= 2)
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pxm += pa->proximity_domain_hi[0] << 8;
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return pxm;
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}
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static int __init
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get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
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{
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int pxm;
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pxm = ma->proximity_domain;
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if (acpi_srat_revision <= 1)
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pxm &= 0xff;
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return pxm;
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}
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/*
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* ACPI 2.0 SLIT (System Locality Information Table)
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* http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
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*/
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void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
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{
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u32 len;
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len = sizeof(struct acpi_table_header) + 8
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+ slit->locality_count * slit->locality_count;
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if (slit->header.length != len) {
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printk(KERN_ERR
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"ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
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len, slit->header.length);
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return;
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}
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slit_table = slit;
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}
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void __init
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acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
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{
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int pxm;
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if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
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return;
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if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
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printk_once(KERN_WARNING
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"node_cpuid[%ld] is too small, may not be able to use all cpus\n",
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ARRAY_SIZE(node_cpuid));
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return;
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}
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pxm = get_processor_proximity_domain(pa);
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/* record this node in proximity bitmap */
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pxm_bit_set(pxm);
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node_cpuid[srat_num_cpus].phys_id =
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(pa->apic_id << 8) | (pa->local_sapic_eid);
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/* nid should be overridden as logical node id later */
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node_cpuid[srat_num_cpus].nid = pxm;
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cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map);
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srat_num_cpus++;
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}
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int __init
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acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
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{
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unsigned long paddr, size;
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int pxm;
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struct node_memblk_s *p, *q, *pend;
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pxm = get_memory_proximity_domain(ma);
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/* fill node memory chunk structure */
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paddr = ma->base_address;
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size = ma->length;
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/* Ignore disabled entries */
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if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
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return -1;
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if (num_node_memblks >= NR_NODE_MEMBLKS) {
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pr_err("NUMA: too many memblk ranges\n");
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return -EINVAL;
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}
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/* record this node in proximity bitmap */
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pxm_bit_set(pxm);
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/* Insertion sort based on base address */
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pend = &node_memblk[num_node_memblks];
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for (p = &node_memblk[0]; p < pend; p++) {
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if (paddr < p->start_paddr)
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break;
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}
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if (p < pend) {
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for (q = pend - 1; q >= p; q--)
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*(q + 1) = *q;
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}
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p->start_paddr = paddr;
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p->size = size;
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p->nid = pxm;
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num_node_memblks++;
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return 0;
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}
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void __init acpi_numa_fixup(void)
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{
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int i, j, node_from, node_to;
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/* If there's no SRAT, fix the phys_id and mark node 0 online */
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if (srat_num_cpus == 0) {
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node_set_online(0);
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node_cpuid[0].phys_id = hard_smp_processor_id();
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return;
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}
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/*
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* MCD - This can probably be dropped now. No need for pxm ID to node ID
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* mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
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*/
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nodes_clear(node_online_map);
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for (i = 0; i < MAX_PXM_DOMAINS; i++) {
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if (pxm_bit_test(i)) {
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int nid = acpi_map_pxm_to_node(i);
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node_set_online(nid);
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}
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}
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/* set logical node id in memory chunk structure */
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for (i = 0; i < num_node_memblks; i++)
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node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
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/* assign memory bank numbers for each chunk on each node */
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for_each_online_node(i) {
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int bank;
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bank = 0;
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for (j = 0; j < num_node_memblks; j++)
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if (node_memblk[j].nid == i)
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node_memblk[j].bank = bank++;
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}
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/* set logical node id in cpu structure */
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for_each_possible_early_cpu(i)
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node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
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printk(KERN_INFO "Number of logical nodes in system = %d\n",
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num_online_nodes());
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printk(KERN_INFO "Number of memory chunks in system = %d\n",
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num_node_memblks);
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if (!slit_table) {
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for (i = 0; i < MAX_NUMNODES; i++)
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for (j = 0; j < MAX_NUMNODES; j++)
|
|
slit_distance(i, j) = i == j ?
|
|
LOCAL_DISTANCE : REMOTE_DISTANCE;
|
|
return;
|
|
}
|
|
|
|
memset(numa_slit, -1, sizeof(numa_slit));
|
|
for (i = 0; i < slit_table->locality_count; i++) {
|
|
if (!pxm_bit_test(i))
|
|
continue;
|
|
node_from = pxm_to_node(i);
|
|
for (j = 0; j < slit_table->locality_count; j++) {
|
|
if (!pxm_bit_test(j))
|
|
continue;
|
|
node_to = pxm_to_node(j);
|
|
slit_distance(node_from, node_to) =
|
|
slit_table->entry[i * slit_table->locality_count + j];
|
|
}
|
|
}
|
|
|
|
#ifdef SLIT_DEBUG
|
|
printk("ACPI 2.0 SLIT locality table:\n");
|
|
for_each_online_node(i) {
|
|
for_each_online_node(j)
|
|
printk("%03d ", node_distance(i, j));
|
|
printk("\n");
|
|
}
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_ACPI_NUMA */
|
|
|
|
/*
|
|
* success: return IRQ number (>=0)
|
|
* failure: return < 0
|
|
*/
|
|
int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
|
|
{
|
|
if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
|
|
return gsi;
|
|
|
|
if (has_8259 && gsi < 16)
|
|
return isa_irq_to_vector(gsi);
|
|
|
|
return iosapic_register_intr(gsi,
|
|
(polarity ==
|
|
ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
|
|
IOSAPIC_POL_LOW,
|
|
(triggering ==
|
|
ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
|
|
IOSAPIC_LEVEL);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_register_gsi);
|
|
|
|
void acpi_unregister_gsi(u32 gsi)
|
|
{
|
|
if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
|
|
return;
|
|
|
|
if (has_8259 && gsi < 16)
|
|
return;
|
|
|
|
iosapic_unregister_intr(gsi);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
|
|
|
|
static int __init acpi_parse_fadt(struct acpi_table_header *table)
|
|
{
|
|
struct acpi_table_header *fadt_header;
|
|
struct acpi_table_fadt *fadt;
|
|
|
|
fadt_header = (struct acpi_table_header *)table;
|
|
if (fadt_header->revision != 3)
|
|
return -ENODEV; /* Only deal with ACPI 2.0 FADT */
|
|
|
|
fadt = (struct acpi_table_fadt *)fadt_header;
|
|
|
|
acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
|
|
ACPI_ACTIVE_LOW);
|
|
return 0;
|
|
}
|
|
|
|
int __init early_acpi_boot_init(void)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* do a partial walk of MADT to determine how many CPUs
|
|
* we have including offline CPUs
|
|
*/
|
|
if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
|
|
printk(KERN_ERR PREFIX "Can't find MADT\n");
|
|
return 0;
|
|
}
|
|
|
|
ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
|
|
acpi_parse_lsapic, NR_CPUS);
|
|
if (ret < 1)
|
|
printk(KERN_ERR PREFIX
|
|
"Error parsing MADT - no LAPIC entries\n");
|
|
else
|
|
acpi_lapic = 1;
|
|
|
|
#ifdef CONFIG_SMP
|
|
if (available_cpus == 0) {
|
|
printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
|
|
printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
|
|
smp_boot_data.cpu_phys_id[available_cpus] =
|
|
hard_smp_processor_id();
|
|
available_cpus = 1; /* We've got at least one of these, no? */
|
|
}
|
|
smp_boot_data.cpu_count = available_cpus;
|
|
#endif
|
|
/* Make boot-up look pretty */
|
|
printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
|
|
total_cpus);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init acpi_boot_init(void)
|
|
{
|
|
|
|
/*
|
|
* MADT
|
|
* ----
|
|
* Parse the Multiple APIC Description Table (MADT), if exists.
|
|
* Note that this table provides platform SMP configuration
|
|
* information -- the successor to MPS tables.
|
|
*/
|
|
|
|
if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
|
|
printk(KERN_ERR PREFIX "Can't find MADT\n");
|
|
goto skip_madt;
|
|
}
|
|
|
|
/* Local APIC */
|
|
|
|
if (acpi_table_parse_madt
|
|
(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
|
|
printk(KERN_ERR PREFIX
|
|
"Error parsing LAPIC address override entry\n");
|
|
|
|
if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
|
|
< 0)
|
|
printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
|
|
|
|
/* I/O APIC */
|
|
|
|
if (acpi_table_parse_madt
|
|
(ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
|
|
printk(KERN_ERR PREFIX
|
|
"Error parsing MADT - no IOSAPIC entries\n");
|
|
}
|
|
|
|
/* System-Level Interrupt Routing */
|
|
|
|
if (acpi_table_parse_madt
|
|
(ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
|
|
ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
|
|
printk(KERN_ERR PREFIX
|
|
"Error parsing platform interrupt source entry\n");
|
|
|
|
if (acpi_table_parse_madt
|
|
(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
|
|
printk(KERN_ERR PREFIX
|
|
"Error parsing interrupt source overrides entry\n");
|
|
|
|
if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
|
|
printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
|
|
skip_madt:
|
|
|
|
/*
|
|
* FADT says whether a legacy keyboard controller is present.
|
|
* The FADT also contains an SCI_INT line, by which the system
|
|
* gets interrupts such as power and sleep buttons. If it's not
|
|
* on a Legacy interrupt, it needs to be setup.
|
|
*/
|
|
if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
|
|
printk(KERN_ERR PREFIX "Can't find FADT\n");
|
|
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
#ifdef CONFIG_SMP
|
|
if (srat_num_cpus == 0) {
|
|
int cpu, i = 1;
|
|
for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
|
|
if (smp_boot_data.cpu_phys_id[cpu] !=
|
|
hard_smp_processor_id())
|
|
node_cpuid[i++].phys_id =
|
|
smp_boot_data.cpu_phys_id[cpu];
|
|
}
|
|
#endif
|
|
build_cpu_to_node_map();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
|
|
{
|
|
int tmp;
|
|
|
|
if (has_8259 && gsi < 16)
|
|
*irq = isa_irq_to_vector(gsi);
|
|
else {
|
|
tmp = gsi_to_irq(gsi);
|
|
if (tmp == -1)
|
|
return -1;
|
|
*irq = tmp;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
|
|
{
|
|
if (isa_irq >= 16)
|
|
return -1;
|
|
*gsi = isa_irq;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ACPI based hotplug CPU support
|
|
*/
|
|
#ifdef CONFIG_ACPI_HOTPLUG_CPU
|
|
int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
|
|
{
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
/*
|
|
* We don't have cpu-only-node hotadd. But if the system equips
|
|
* SRAT table, pxm is already found and node is ready.
|
|
* So, just pxm_to_nid(pxm) is OK.
|
|
* This code here is for the system which doesn't have full SRAT
|
|
* table for possible cpus.
|
|
*/
|
|
node_cpuid[cpu].phys_id = physid;
|
|
node_cpuid[cpu].nid = acpi_get_node(handle);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int additional_cpus __initdata = -1;
|
|
|
|
static __init int setup_additional_cpus(char *s)
|
|
{
|
|
if (s)
|
|
additional_cpus = simple_strtol(s, NULL, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
early_param("additional_cpus", setup_additional_cpus);
|
|
|
|
/*
|
|
* cpu_possible_mask should be static, it cannot change as CPUs
|
|
* are onlined, or offlined. The reason is per-cpu data-structures
|
|
* are allocated by some modules at init time, and dont expect to
|
|
* do this dynamically on cpu arrival/departure.
|
|
* cpu_present_mask on the other hand can change dynamically.
|
|
* In case when cpu_hotplug is not compiled, then we resort to current
|
|
* behaviour, which is cpu_possible == cpu_present.
|
|
* - Ashok Raj
|
|
*
|
|
* Three ways to find out the number of additional hotplug CPUs:
|
|
* - If the BIOS specified disabled CPUs in ACPI/mptables use that.
|
|
* - The user can overwrite it with additional_cpus=NUM
|
|
* - Otherwise don't reserve additional CPUs.
|
|
*/
|
|
__init void prefill_possible_map(void)
|
|
{
|
|
int i;
|
|
int possible, disabled_cpus;
|
|
|
|
disabled_cpus = total_cpus - available_cpus;
|
|
|
|
if (additional_cpus == -1) {
|
|
if (disabled_cpus > 0)
|
|
additional_cpus = disabled_cpus;
|
|
else
|
|
additional_cpus = 0;
|
|
}
|
|
|
|
possible = available_cpus + additional_cpus;
|
|
|
|
if (possible > nr_cpu_ids)
|
|
possible = nr_cpu_ids;
|
|
|
|
printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
|
|
possible, max((possible - available_cpus), 0));
|
|
|
|
for (i = 0; i < possible; i++)
|
|
set_cpu_possible(i, true);
|
|
}
|
|
|
|
static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
|
|
{
|
|
cpumask_t tmp_map;
|
|
int cpu;
|
|
|
|
cpumask_complement(&tmp_map, cpu_present_mask);
|
|
cpu = cpumask_first(&tmp_map);
|
|
if (cpu >= nr_cpu_ids)
|
|
return -EINVAL;
|
|
|
|
acpi_map_cpu2node(handle, cpu, physid);
|
|
|
|
set_cpu_present(cpu, true);
|
|
ia64_cpu_to_sapicid[cpu] = physid;
|
|
|
|
acpi_processor_set_pdc(handle);
|
|
|
|
*pcpu = cpu;
|
|
return (0);
|
|
}
|
|
|
|
/* wrapper to silence section mismatch warning */
|
|
int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
|
|
int *pcpu)
|
|
{
|
|
return _acpi_map_lsapic(handle, physid, pcpu);
|
|
}
|
|
EXPORT_SYMBOL(acpi_map_cpu);
|
|
|
|
int acpi_unmap_cpu(int cpu)
|
|
{
|
|
ia64_cpu_to_sapicid[cpu] = -1;
|
|
set_cpu_present(cpu, false);
|
|
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
/* NUMA specific cleanup's */
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
EXPORT_SYMBOL(acpi_unmap_cpu);
|
|
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
|
|
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
|
|
void *context, void **ret)
|
|
{
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
struct acpi_madt_io_sapic *iosapic;
|
|
unsigned int gsi_base;
|
|
int node;
|
|
|
|
/* Only care about objects w/ a method that returns the MADT */
|
|
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
|
|
return AE_OK;
|
|
|
|
if (!buffer.length || !buffer.pointer)
|
|
return AE_OK;
|
|
|
|
obj = buffer.pointer;
|
|
if (obj->type != ACPI_TYPE_BUFFER ||
|
|
obj->buffer.length < sizeof(*iosapic)) {
|
|
kfree(buffer.pointer);
|
|
return AE_OK;
|
|
}
|
|
|
|
iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
|
|
|
|
if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
|
|
kfree(buffer.pointer);
|
|
return AE_OK;
|
|
}
|
|
|
|
gsi_base = iosapic->global_irq_base;
|
|
|
|
kfree(buffer.pointer);
|
|
|
|
/* OK, it's an IOSAPIC MADT entry; associate it with a node */
|
|
node = acpi_get_node(handle);
|
|
if (node == NUMA_NO_NODE || !node_online(node) ||
|
|
cpumask_empty(cpumask_of_node(node)))
|
|
return AE_OK;
|
|
|
|
/* We know a gsi to node mapping! */
|
|
map_iosapic_to_node(gsi_base, node);
|
|
return AE_OK;
|
|
}
|
|
|
|
static int __init
|
|
acpi_map_iosapics (void)
|
|
{
|
|
acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
|
|
return 0;
|
|
}
|
|
|
|
fs_initcall(acpi_map_iosapics);
|
|
#endif /* CONFIG_ACPI_NUMA */
|
|
|
|
int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
|
|
{
|
|
int err;
|
|
|
|
if ((err = iosapic_init(phys_addr, gsi_base)))
|
|
return err;
|
|
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
acpi_map_iosapic(handle, 0, NULL, NULL);
|
|
#endif /* CONFIG_ACPI_NUMA */
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_register_ioapic);
|
|
|
|
int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
|
|
{
|
|
return iosapic_remove(gsi_base);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_unregister_ioapic);
|
|
|
|
/*
|
|
* acpi_suspend_lowlevel() - save kernel state and suspend.
|
|
*
|
|
* TBD when when IA64 starts to support suspend...
|
|
*/
|
|
int acpi_suspend_lowlevel(void) { return 0; }
|