diff options
Diffstat (limited to 'arch/x86_64/mm/srat.c')
| -rw-r--r-- | arch/x86_64/mm/srat.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c deleted file mode 100644 index 8e3d097a9dd..00000000000 --- a/arch/x86_64/mm/srat.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * 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 <asm/proto.h> -#include <asm/numa.h> - -static struct acpi_table_slit *acpi_slit; - -/* Internal processor count */ -static unsigned int __initdata num_processors = 0; - -static nodemask_t nodes_parsed __initdata; -static nodemask_t nodes_found __initdata; -static struct node nodes[MAX_NUMNODES] __initdata; -static __u8 pxm2node[256] = { [0 ... 255] = 0xff }; - -static __init int setup_node(int pxm) -{ - unsigned node = pxm2node[pxm]; - if (node == 0xff) { - if (nodes_weight(nodes_found) >= MAX_NUMNODES) - return -1; - node = first_unset_node(nodes_found); - node_set(node, nodes_found); - pxm2node[pxm] = node; - } - return pxm2node[pxm]; -} - -static __init int conflicting_nodes(unsigned long start, unsigned long end) -{ - int i; - for_each_online_node(i) { - struct node *nd = &nodes[i]; - if (nd->start == nd->end) - continue; - if (nd->end > start && nd->start < end) - return 1; - if (nd->end == end && nd->start == start) - return 1; - } - return -1; -} - -static __init void cutoff_node(int i, unsigned long start, unsigned long end) -{ - struct node *nd = &nodes[i]; - if (nd->start < start) { - nd->start = start; - if (nd->end < nd->start) - nd->start = nd->end; - } - if (nd->end > end) { - if (!(end & 0xfff)) - end--; - nd->end = end; - if (nd->start > nd->end) - nd->start = nd->end; - } -} - -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 numa_off || acpi_numa < 0; -} - -/* Callback for SLIT parsing */ -void __init acpi_numa_slit_init(struct acpi_table_slit *slit) -{ - acpi_slit = slit; -} - -/* Callback for Proximity Domain -> LAPIC mapping */ -void __init -acpi_numa_processor_affinity_init(struct acpi_table_processor_affinity *pa) -{ - int pxm, node; - if (srat_disabled() || pa->flags.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; - } - if (num_processors >= NR_CPUS) { - printk(KERN_ERR "SRAT: Processor #%d (lapic %u) INVALID. (Max ID: %d).\n", - num_processors, pa->apic_id, NR_CPUS); - bad_srat(); - return; - } - cpu_to_node[num_processors] = node; - acpi_numa = 1; - printk(KERN_INFO "SRAT: PXM %u -> APIC %u -> CPU %u -> Node %u\n", - pxm, pa->apic_id, num_processors, node); - - num_processors++; -} - -/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */ -void __init -acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma) -{ - struct node *nd; - unsigned long start, end; - int node, pxm; - int i; - - if (srat_disabled() || ma->flags.enabled == 0) - return; - pxm = ma->proximity_domain; - node = setup_node(pxm); - if (node < 0) { - printk(KERN_ERR "SRAT: Too many proximity domains.\n"); - bad_srat(); - return; - } - start = ma->base_addr_lo | ((u64)ma->base_addr_hi << 32); - end = start + (ma->length_lo | ((u64)ma->length_hi << 32)); - /* It is fine to add this area to the nodes data it will be used later*/ - if (ma->flags.hot_pluggable == 1) - printk(KERN_INFO "SRAT: hot plug zone found %lx - %lx \n", - start, end); - i = conflicting_nodes(start, end); - if (i >= 0) { - printk(KERN_ERR - "SRAT: pxm %d overlap %lx-%lx with node %d(%Lx-%Lx)\n", - pxm, start, end, i, nodes[i].start, nodes[i].end); - bad_srat(); - return; - } - nd = &nodes[node]; - if (!node_test_and_set(node, nodes_parsed)) { - nd->start = start; - nd->end = end; - } else { - if (start < nd->start) - nd->start = start; - if (nd->end < end) - nd->end = end; - } - if (!(nd->end & 0xfff)) - nd->end--; - printk(KERN_INFO "SRAT: Node %u PXM %u %Lx-%Lx\n", node, pxm, - nd->start, nd->end); -} - -void __init acpi_numa_arch_fixup(void) {} - -/* Use the information discovered above to actually set up the nodes. */ -int __init acpi_scan_nodes(unsigned long start, unsigned long end) -{ - int i; - if (acpi_numa <= 0) - return -1; - memnode_shift = compute_hash_shift(nodes, nodes_weight(nodes_parsed)); - if (memnode_shift < 0) { - printk(KERN_ERR - "SRAT: No NUMA node hash function found. Contact maintainer\n"); - bad_srat(); - return -1; - } - for (i = 0; i < MAX_NUMNODES; i++) { - if (!node_isset(i, nodes_parsed)) - continue; - cutoff_node(i, start, end); - if (nodes[i].start == nodes[i].end) { - node_clear(i, nodes_parsed); - continue; - } - setup_node_bootmem(i, nodes[i].start, nodes[i].end); - } - for (i = 0; i < NR_CPUS; i++) { - if (cpu_to_node[i] == NUMA_NO_NODE) - continue; - if (!node_isset(cpu_to_node[i], nodes_parsed)) - cpu_to_node[i] = NUMA_NO_NODE; - } - numa_init_array(); - return 0; -} - -int node_to_pxm(int n) -{ - int i; - if (pxm2node[n] == n) - return n; - for (i = 0; i < 256; i++) - if (pxm2node[i] == n) - return i; - return 0; -} - -int __node_distance(int a, int b) -{ - int index; - - if (!acpi_slit) - return a == b ? 10 : 20; - index = acpi_slit->localities * node_to_pxm(a); - return acpi_slit->entry[index + node_to_pxm(b)]; -} - -EXPORT_SYMBOL(__node_distance); |