mirror of
https://github.com/torvalds/linux.git
synced 2024-12-15 23:51:46 +00:00
ba6a328f7d
In slit init code, too many pxm_to_node() function calls are done. We can store from_node/to_node instead of keep calling pxm_to_node(). - Before this patch: pxm_to_node() is called n*(1+n*3) times. - After this patch: pxm_to_node() is called n*(1+n) times. for 8 sockets, it will be 72 instead of 200. for 32 sockets, it will be 1056 instead of 3104. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Toshi Kani <toshi.kani@hp.com> Cc: David Rientjes <rientjes@google.com> Link: http://lkml.kernel.org/r/1390770102-4007-1-git-send-email-yinghai@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
223 lines
5.3 KiB
C
223 lines
5.3 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 __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;
|
|
}
|
|
|
|
static __init inline int srat_disabled(void)
|
|
{
|
|
return acpi_numa < 0;
|
|
}
|
|
|
|
/*
|
|
* Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
|
|
* I/O localities since SRAT does not list them. I/O localities are
|
|
* not supported at this point.
|
|
*/
|
|
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < slit->locality_count; i++) {
|
|
const int from_node = pxm_to_node(i);
|
|
|
|
if (from_node == NUMA_NO_NODE)
|
|
continue;
|
|
|
|
for (j = 0; j < slit->locality_count; j++) {
|
|
const int to_node = pxm_to_node(j);
|
|
|
|
if (to_node == NUMA_NO_NODE)
|
|
continue;
|
|
|
|
numa_set_distance(from_node, to_node,
|
|
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;
|
|
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 = setup_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);
|
|
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;
|
|
if (acpi_srat_revision >= 2)
|
|
pxm |= *((unsigned int*)pa->proximity_domain_hi) << 8;
|
|
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
|
|
static inline int save_add_info(void) {return 1;}
|
|
#else
|
|
static inline int save_add_info(void) {return 0;}
|
|
#endif
|
|
|
|
/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */
|
|
int __init
|
|
acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
|
|
{
|
|
u64 start, end;
|
|
u32 hotpluggable;
|
|
int node, pxm;
|
|
|
|
if (srat_disabled())
|
|
goto out_err;
|
|
if (ma->header.length != sizeof(struct acpi_srat_mem_affinity))
|
|
goto out_err_bad_srat;
|
|
if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
|
|
goto out_err;
|
|
hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
|
|
if (hotpluggable && !save_add_info())
|
|
goto out_err;
|
|
|
|
start = ma->base_address;
|
|
end = start + ma->length;
|
|
pxm = ma->proximity_domain;
|
|
if (acpi_srat_revision <= 1)
|
|
pxm &= 0xff;
|
|
|
|
node = setup_node(pxm);
|
|
if (node < 0) {
|
|
printk(KERN_ERR "SRAT: Too many proximity domains.\n");
|
|
goto out_err_bad_srat;
|
|
}
|
|
|
|
if (numa_add_memblk(node, start, end) < 0)
|
|
goto out_err_bad_srat;
|
|
|
|
node_set(node, numa_nodes_parsed);
|
|
|
|
pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s\n",
|
|
node, pxm,
|
|
(unsigned long long) start, (unsigned long long) end - 1,
|
|
hotpluggable ? " hotplug" : "");
|
|
|
|
/* Mark hotplug range in memblock. */
|
|
if (hotpluggable && memblock_mark_hotplug(start, ma->length))
|
|
pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
|
|
(unsigned long long)start, (unsigned long long)end - 1);
|
|
|
|
return 0;
|
|
out_err_bad_srat:
|
|
bad_srat();
|
|
out_err:
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
}
|