261 lines
6.1 KiB
C
261 lines
6.1 KiB
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/bootmem.h>
|
|
#include <linux/memblock.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>
|
|
|
|
int acpi_numa __initdata;
|
|
|
|
static struct bootnode nodes_add[MAX_NUMNODES];
|
|
|
|
static __init int setup_node(int pxm)
|
|
{
|
|
return acpi_map_pxm_to_node(pxm);
|
|
}
|
|
|
|
static __init void bad_srat(void)
|
|
{
|
|
printk(KERN_ERR "SRAT: SRAT not used.\n");
|
|
acpi_numa = -1;
|
|
memset(nodes_add, 0, sizeof(nodes_add));
|
|
}
|
|
|
|
static __init inline int srat_disabled(void)
|
|
{
|
|
return acpi_numa < 0;
|
|
}
|
|
|
|
/* Callback for SLIT parsing */
|
|
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < slit->locality_count; i++)
|
|
for (j = 0; j < slit->locality_count; j++)
|
|
numa_set_distance(pxm_to_node(i), pxm_to_node(j),
|
|
slit->entry[slit->locality_count * i + j]);
|
|
}
|
|
|
|
/* 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;
|
|
node = setup_node(pxm);
|
|
if (node < 0) {
|
|
printk(KERN_ERR "SRAT: Too many proximity domains %x\n", pxm);
|
|
bad_srat();
|
|
return;
|
|
}
|
|
|
|
apic_id = pa->apic_id;
|
|
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);
|
|
acpi_numa = 1;
|
|
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;
|
|
node = setup_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);
|
|
acpi_numa = 1;
|
|
printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n",
|
|
pxm, apic_id, node);
|
|
}
|
|
|
|
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
|
|
static inline int save_add_info(void) {return 1;}
|
|
#else
|
|
static inline int save_add_info(void) {return 0;}
|
|
#endif
|
|
/*
|
|
* Update nodes_add[]
|
|
* This code supports one contiguous hot add area per node
|
|
*/
|
|
static void __init
|
|
update_nodes_add(int node, unsigned long start, unsigned long end)
|
|
{
|
|
unsigned long s_pfn = start >> PAGE_SHIFT;
|
|
unsigned long e_pfn = end >> PAGE_SHIFT;
|
|
int changed = 0;
|
|
struct bootnode *nd = &nodes_add[node];
|
|
|
|
/* I had some trouble with strange memory hotadd regions breaking
|
|
the boot. Be very strict here and reject anything unexpected.
|
|
If you want working memory hotadd write correct SRATs.
|
|
|
|
The node size check is a basic sanity check to guard against
|
|
mistakes */
|
|
if ((signed long)(end - start) < NODE_MIN_SIZE) {
|
|
printk(KERN_ERR "SRAT: Hotplug area too small\n");
|
|
return;
|
|
}
|
|
|
|
/* This check might be a bit too strict, but I'm keeping it for now. */
|
|
if (absent_pages_in_range(s_pfn, e_pfn) != e_pfn - s_pfn) {
|
|
printk(KERN_ERR
|
|
"SRAT: Hotplug area %lu -> %lu has existing memory\n",
|
|
s_pfn, e_pfn);
|
|
return;
|
|
}
|
|
|
|
/* Looks good */
|
|
|
|
if (nd->start == nd->end) {
|
|
nd->start = start;
|
|
nd->end = end;
|
|
changed = 1;
|
|
} else {
|
|
if (nd->start == end) {
|
|
nd->start = start;
|
|
changed = 1;
|
|
}
|
|
if (nd->end == start) {
|
|
nd->end = end;
|
|
changed = 1;
|
|
}
|
|
if (!changed)
|
|
printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n");
|
|
}
|
|
|
|
if (changed) {
|
|
node_set(node, numa_nodes_parsed);
|
|
printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n",
|
|
nd->start, nd->end);
|
|
}
|
|
}
|
|
|
|
/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
|
|
void __init
|
|
acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
|
|
{
|
|
unsigned long start, end;
|
|
int node, pxm;
|
|
|
|
if (srat_disabled())
|
|
return;
|
|
if (ma->header.length != sizeof(struct acpi_srat_mem_affinity)) {
|
|
bad_srat();
|
|
return;
|
|
}
|
|
if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
|
|
return;
|
|
|
|
if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) && !save_add_info())
|
|
return;
|
|
start = ma->base_address;
|
|
end = start + ma->length;
|
|
pxm = ma->proximity_domain;
|
|
node = setup_node(pxm);
|
|
if (node < 0) {
|
|
printk(KERN_ERR "SRAT: Too many proximity domains.\n");
|
|
bad_srat();
|
|
return;
|
|
}
|
|
|
|
if (numa_add_memblk(node, start, end) < 0) {
|
|
bad_srat();
|
|
return;
|
|
}
|
|
|
|
printk(KERN_INFO "SRAT: Node %u PXM %u %lx-%lx\n", node, pxm,
|
|
start, end);
|
|
|
|
if (ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE)
|
|
update_nodes_add(node, start, end);
|
|
}
|
|
|
|
void __init acpi_numa_arch_fixup(void) {}
|
|
|
|
int __init x86_acpi_numa_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = acpi_numa_init();
|
|
if (ret < 0)
|
|
return ret;
|
|
return srat_disabled() ? -EINVAL : 0;
|
|
}
|
|
|
|
#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) || defined(CONFIG_ACPI_HOTPLUG_MEMORY)
|
|
int memory_add_physaddr_to_nid(u64 start)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
for_each_node(i)
|
|
if (nodes_add[i].start <= start && nodes_add[i].end > start)
|
|
ret = i;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
|
|
#endif
|