2005-04-16 16:20:36 -06:00
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/*
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* ACPI 3.0 based NUMA setup
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* Copyright 2004 Andi Kleen, SuSE Labs.
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*
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* Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
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*
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* Called from acpi_numa_init while reading the SRAT and SLIT tables.
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* Assumes all memory regions belonging to a single proximity domain
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* are in one chunk. Holes between them will be included in the node.
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*/
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/mmzone.h>
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#include <linux/bitmap.h>
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2016-07-13 18:18:55 -06:00
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#include <linux/init.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/topology.h>
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2006-04-07 11:49:18 -06:00
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#include <linux/mm.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/proto.h>
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#include <asm/numa.h>
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2006-01-11 14:44:39 -07:00
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#include <asm/e820.h>
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2009-02-17 05:58:15 -07:00
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#include <asm/apic.h>
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2009-01-21 02:24:27 -07:00
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#include <asm/uv/uv.h>
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2005-04-16 16:20:36 -06:00
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2009-03-30 15:55:30 -06:00
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/* Callback for Proximity Domain -> x2APIC mapping */
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void __init
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acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
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{
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int pxm, node;
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int apic_id;
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if (srat_disabled())
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return;
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if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
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bad_srat();
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return;
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}
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
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return;
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pxm = pa->proximity_domain;
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2011-12-21 18:45:16 -07:00
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apic_id = pa->apic_id;
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2012-03-16 13:25:35 -06:00
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if (!apic->apic_id_valid(apic_id)) {
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2011-12-21 18:45:16 -07:00
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printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
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pxm, apic_id);
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return;
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}
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2016-05-24 16:35:38 -06:00
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node = acpi_map_pxm_to_node(pxm);
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2009-03-30 15:55:30 -06:00
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if (node < 0) {
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printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
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bad_srat();
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return;
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}
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2010-12-16 20:09:58 -07:00
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if (apic_id >= MAX_LOCAL_APIC) {
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
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return;
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}
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2011-01-23 06:37:39 -07:00
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set_apicid_to_node(apic_id, node);
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2011-02-16 09:11:09 -07:00
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node_set(node, numa_nodes_parsed);
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2009-11-21 01:23:37 -07:00
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
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2009-03-30 15:55:30 -06:00
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pxm, apic_id, node);
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}
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2005-04-16 16:20:36 -06:00
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/* Callback for Proximity Domain -> LAPIC mapping */
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void __init
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2007-02-02 09:48:22 -07:00
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acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
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2005-04-16 16:20:36 -06:00
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{
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int pxm, node;
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2008-01-30 05:33:10 -07:00
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int apic_id;
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2006-02-03 13:51:26 -07:00
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if (srat_disabled())
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return;
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2007-02-02 09:48:22 -07:00
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if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
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2006-05-15 10:19:44 -06:00
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bad_srat();
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2006-02-03 13:51:26 -07:00
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return;
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}
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2007-02-02 09:48:22 -07:00
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
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2005-04-16 16:20:36 -06:00
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return;
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2007-02-02 09:48:22 -07:00
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pxm = pa->proximity_domain_lo;
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2012-01-17 02:20:31 -07:00
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if (acpi_srat_revision >= 2)
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pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
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2016-05-24 16:35:38 -06:00
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node = acpi_map_pxm_to_node(pxm);
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2005-04-16 16:20:36 -06:00
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if (node < 0) {
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printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
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bad_srat();
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return;
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}
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2008-02-17 00:00:22 -07:00
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2008-09-23 14:37:13 -06:00
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if (get_uv_system_type() >= UV_X2APIC)
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2008-03-28 13:12:08 -06:00
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apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
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else
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apic_id = pa->apic_id;
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2010-12-16 20:09:58 -07:00
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if (apic_id >= MAX_LOCAL_APIC) {
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
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return;
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}
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2011-01-23 06:37:39 -07:00
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set_apicid_to_node(apic_id, node);
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2011-02-16 09:11:09 -07:00
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node_set(node, numa_nodes_parsed);
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2009-11-21 01:23:37 -07:00
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printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
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2008-01-30 05:33:10 -07:00
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pxm, apic_id, node);
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2005-04-16 16:20:36 -06:00
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}
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2011-02-16 04:13:06 -07:00
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int __init x86_acpi_numa_init(void)
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{
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int ret;
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ret = acpi_numa_init();
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if (ret < 0)
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return ret;
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return srat_disabled() ? -EINVAL : 0;
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}
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