[linux-2.6-block.git] / arch / x86 / mm / srat.c

/*
 * ACPI 3.0 based NUMA setup
 * Copyright 2004 Andi Kleen, SuSE Labs.
 *
 * Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
 *
 * Called from acpi_numa_init while reading the SRAT and SLIT tables.
 * Assumes all memory regions belonging to a single proximity domain
 * are in one chunk. Holes between them will be included in the node.
 */

#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/mmzone.h>
#include <linux/bitmap.h>
#include <linux/module.h>
#include <linux/topology.h>
#include <linux/mm.h>
#include <asm/proto.h>
#include <asm/numa.h>
#include <asm/e820.h>
#include <asm/apic.h>
#include <asm/uv/uv.h>

/* Callback for Proximity Domain -> x2APIC mapping */
void __init
acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
{
	int pxm, node;
	int apic_id;

	if (srat_disabled())
		return;
	if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
		bad_srat();
		return;
	}
	if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
		return;
	pxm = pa->proximity_domain;
	apic_id = pa->apic_id;
	if (!apic->apic_id_valid(apic_id)) {
		printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
			 pxm, apic_id);
		return;
	}
	node = acpi_map_pxm_to_node(pxm);
	if (node < 0) {
		printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
		bad_srat();
		return;
	}

	if (apic_id >= MAX_LOCAL_APIC) {
		printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
		return;
	}
	set_apicid_to_node(apic_id, node);
	node_set(node, numa_nodes_parsed);
	printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
	       pxm, apic_id, node);
}

/* Callback for Proximity Domain -> LAPIC mapping */
void __init
acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
{
	int pxm, node;
	int apic_id;

	if (srat_disabled())
		return;
	if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
		bad_srat();
		return;
	}
	if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
		return;
	pxm = pa->proximity_domain_lo;
	if (acpi_srat_revision >= 2)
		pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
	node = acpi_map_pxm_to_node(pxm);
	if (node < 0) {
		printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
		bad_srat();
		return;
	}

	if (get_uv_system_type() >= UV_X2APIC)
		apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
	else
		apic_id = pa->apic_id;

	if (apic_id >= MAX_LOCAL_APIC) {
		printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
		return;
	}

	set_apicid_to_node(apic_id, node);
	node_set(node, numa_nodes_parsed);
	printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
	       pxm, apic_id, node);
}

int __init x86_acpi_numa_init(void)
{
	int ret;

	ret = acpi_numa_init();
	if (ret < 0)
		return ret;
	return srat_disabled() ? -EINVAL : 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ACPI 3.0 based NUMA setup
	3	* Copyright 2004 Andi Kleen, SuSE Labs.
	4	*
	5	* Reads the ACPI SRAT table to figure out what memory belongs to which CPUs.
	6	*
	7	* Called from acpi_numa_init while reading the SRAT and SLIT tables.
	8	* Assumes all memory regions belonging to a single proximity domain
	9	* are in one chunk. Holes between them will be included in the node.
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/acpi.h>
	14	#include <linux/mmzone.h>
	15	#include <linux/bitmap.h>
	16	#include <linux/module.h>
	17	#include <linux/topology.h>
68a3a7fe	18	#include <linux/mm.h>
1da177e4 LT	19	#include <asm/proto.h>
1da177e4 LT	20	#include <asm/numa.h>
8a6fdd3e	21	#include <asm/e820.h>
7b6aa335	22	#include <asm/apic.h>
4ec71fa2	23	#include <asm/uv/uv.h>
1da177e4	24
7237d3de SS	25	/* Callback for Proximity Domain -> x2APIC mapping */
	26	void __init
	27	acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
	28	{
	29	int pxm, node;
	30	int apic_id;
	31
	32	if (srat_disabled())
	33	return;
	34	if (pa->header.length < sizeof(struct acpi_srat_x2apic_cpu_affinity)) {
	35	bad_srat();
	36	return;
	37	}
	38	if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
	39	return;
	40	pxm = pa->proximity_domain;
a35fd282	41	apic_id = pa->apic_id;
b7157acf	42	if (!apic->apic_id_valid(apic_id)) {
a35fd282 YL	43	printk(KERN_INFO "SRAT: PXM %u -> X2APIC 0x%04x ignored\n",
	44	pxm, apic_id);
	45	return;
	46	}
2faeff1d	47	node = acpi_map_pxm_to_node(pxm);
7237d3de SS	48	if (node < 0) {
	49	printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
	50	bad_srat();
	51	return;
	52	}
	53
d3bd0588 YL	54	if (apic_id >= MAX_LOCAL_APIC) {
	55	printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
	56	return;
	57	}
bbc9e2f4	58	set_apicid_to_node(apic_id, node);
92d4a437	59	node_set(node, numa_nodes_parsed);
163d3866	60	printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n",
7237d3de SS	61	pxm, apic_id, node);
	62	}
	63
1da177e4 LT	64	/* Callback for Proximity Domain -> LAPIC mapping */
1da177e4 LT	65	void __init
15a58ed1	66	acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
1da177e4 LT	67	{
1da177e4 LT	68	int pxm, node;
ef97001f	69	int apic_id;
ef97001f	70
d22fe808 AK	71	if (srat_disabled())
d22fe808 AK	72	return;
15a58ed1	73	if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
fad7906d	74	bad_srat();
d22fe808 AK	75	return;
d22fe808 AK	76	}
15a58ed1	77	if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
1da177e4	78	return;
15a58ed1	79	pxm = pa->proximity_domain_lo;
cd298f60 KG	80	if (acpi_srat_revision >= 2)
cd298f60 KG	81	pxm \|= ((unsigned int)pa->proximity_domain_hi) << 8;
2faeff1d	82	node = acpi_map_pxm_to_node(pxm);
1da177e4 LT	83	if (node < 0) {
	84	printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
	85	bad_srat();
	86	return;
	87	}
beafe91f	88
2e42060c	89	if (get_uv_system_type() >= UV_X2APIC)
a65d1d64 JS	90	apic_id = (pa->apic_id << 8) \| pa->local_sapic_eid;
	91	else
	92	apic_id = pa->apic_id;
d3bd0588 YL	93
	94	if (apic_id >= MAX_LOCAL_APIC) {
	95	printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node);
	96	return;
	97	}
	98
bbc9e2f4	99	set_apicid_to_node(apic_id, node);
92d4a437	100	node_set(node, numa_nodes_parsed);
163d3866	101	printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
ef97001f	102	pxm, apic_id, node);
1da177e4 LT	103	}
1da177e4 LT	104
a9aec56a TH	105	int __init x86_acpi_numa_init(void)
	106	{
	107	int ret;
	108
	109	ret = acpi_numa_init();
	110	if (ret < 0)
	111	return ret;
	112	return srat_disabled() ? -EINVAL : 0;
	113	}