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Diffstat (limited to 'arch/x86/mm/numa_64.c')
-rw-r--r--arch/x86/mm/numa_64.c632
1 files changed, 3 insertions, 629 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 16b82ad34b9..9405ffc9150 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -2,637 +2,11 @@
* Generic VM initialization for x86-64 NUMA setups.
* Copyright 2002,2003 Andi Kleen, SuSE Labs.
*/
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/init.h>
#include <linux/bootmem.h>
-#include <linux/mmzone.h>
-#include <linux/ctype.h>
-#include <linux/module.h>
-#include <linux/nodemask.h>
-#include <linux/sched.h>
-#include <asm/e820.h>
-#include <asm/proto.h>
-#include <asm/dma.h>
-#include <asm/numa.h>
-#include <asm/acpi.h>
-#include <asm/k8.h>
+#include "numa_internal.h"
-#ifndef Dprintk
-#define Dprintk(x...)
-#endif
-
-struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_data);
-
-bootmem_data_t plat_node_bdata[MAX_NUMNODES];
-
-struct memnode memnode;
-
-int x86_cpu_to_node_map_init[NR_CPUS] = {
- [0 ... NR_CPUS-1] = NUMA_NO_NODE
-};
-void *x86_cpu_to_node_map_early_ptr;
-DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
-EXPORT_PER_CPU_SYMBOL(x86_cpu_to_node_map);
-EXPORT_SYMBOL(x86_cpu_to_node_map_early_ptr);
-
-s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
- [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
-};
-
-cpumask_t node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_to_cpumask_map);
-
-int numa_off __initdata;
-unsigned long __initdata nodemap_addr;
-unsigned long __initdata nodemap_size;
-
-/*
- * Given a shift value, try to populate memnodemap[]
- * Returns :
- * 1 if OK
- * 0 if memnodmap[] too small (of shift too small)
- * -1 if node overlap or lost ram (shift too big)
- */
-static int __init populate_memnodemap(const struct bootnode *nodes,
- int numnodes, int shift)
-{
- unsigned long addr, end;
- int i, res = -1;
-
- memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize);
- for (i = 0; i < numnodes; i++) {
- addr = nodes[i].start;
- end = nodes[i].end;
- if (addr >= end)
- continue;
- if ((end >> shift) >= memnodemapsize)
- return 0;
- do {
- if (memnodemap[addr >> shift] != NUMA_NO_NODE)
- return -1;
- memnodemap[addr >> shift] = i;
- addr += (1UL << shift);
- } while (addr < end);
- res = 1;
- }
- return res;
-}
-
-static int __init allocate_cachealigned_memnodemap(void)
-{
- unsigned long addr;
-
- memnodemap = memnode.embedded_map;
- if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map))
- return 0;
-
- addr = 0x8000;
- nodemap_size = round_up(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES);
- nodemap_addr = find_e820_area(addr, end_pfn<<PAGE_SHIFT,
- nodemap_size, L1_CACHE_BYTES);
- if (nodemap_addr == -1UL) {
- printk(KERN_ERR
- "NUMA: Unable to allocate Memory to Node hash map\n");
- nodemap_addr = nodemap_size = 0;
- return -1;
- }
- memnodemap = phys_to_virt(nodemap_addr);
- reserve_early(nodemap_addr, nodemap_addr + nodemap_size, "MEMNODEMAP");
-
- printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n",
- nodemap_addr, nodemap_addr + nodemap_size);
- return 0;
-}
-
-/*
- * The LSB of all start and end addresses in the node map is the value of the
- * maximum possible shift.
- */
-static int __init extract_lsb_from_nodes(const struct bootnode *nodes,
- int numnodes)
-{
- int i, nodes_used = 0;
- unsigned long start, end;
- unsigned long bitfield = 0, memtop = 0;
-
- for (i = 0; i < numnodes; i++) {
- start = nodes[i].start;
- end = nodes[i].end;
- if (start >= end)
- continue;
- bitfield |= start;
- nodes_used++;
- if (end > memtop)
- memtop = end;
- }
- if (nodes_used <= 1)
- i = 63;
- else
- i = find_first_bit(&bitfield, sizeof(unsigned long)*8);
- memnodemapsize = (memtop >> i)+1;
- return i;
-}
-
-int __init compute_hash_shift(struct bootnode *nodes, int numnodes)
-{
- int shift;
-
- shift = extract_lsb_from_nodes(nodes, numnodes);
- if (allocate_cachealigned_memnodemap())
- return -1;
- printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n",
- shift);
-
- if (populate_memnodemap(nodes, numnodes, shift) != 1) {
- printk(KERN_INFO "Your memory is not aligned you need to "
- "rebuild your kernel with a bigger NODEMAPSIZE "
- "shift=%d\n", shift);
- return -1;
- }
- return shift;
-}
-
-int early_pfn_to_nid(unsigned long pfn)
-{
- return phys_to_nid(pfn << PAGE_SHIFT);
-}
-
-static void * __init early_node_mem(int nodeid, unsigned long start,
- unsigned long end, unsigned long size,
- unsigned long align)
-{
- unsigned long mem = find_e820_area(start, end, size, align);
- void *ptr;
-
- if (mem != -1L)
- return __va(mem);
-
- ptr = __alloc_bootmem_nopanic(size, align, __pa(MAX_DMA_ADDRESS));
- if (ptr == NULL) {
- printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
- size, nodeid);
- return NULL;
- }
- return ptr;
-}
-
-/* Initialize bootmem allocator for a node */
-void __init setup_node_bootmem(int nodeid, unsigned long start,
- unsigned long end)
-{
- unsigned long start_pfn, end_pfn, bootmap_pages, bootmap_size;
- unsigned long bootmap_start, nodedata_phys;
- void *bootmap;
- const int pgdat_size = round_up(sizeof(pg_data_t), PAGE_SIZE);
-
- start = round_up(start, ZONE_ALIGN);
-
- printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid,
- start, end);
-
- start_pfn = start >> PAGE_SHIFT;
- end_pfn = end >> PAGE_SHIFT;
-
- node_data[nodeid] = early_node_mem(nodeid, start, end, pgdat_size,
- SMP_CACHE_BYTES);
- if (node_data[nodeid] == NULL)
- return;
- nodedata_phys = __pa(node_data[nodeid]);
- printk(KERN_INFO " NODE_DATA [%016lx - %016lx]\n", nodedata_phys,
- nodedata_phys + pgdat_size - 1);
-
- memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t));
- NODE_DATA(nodeid)->bdata = &plat_node_bdata[nodeid];
- NODE_DATA(nodeid)->node_start_pfn = start_pfn;
- NODE_DATA(nodeid)->node_spanned_pages = end_pfn - start_pfn;
-
- /* Find a place for the bootmem map */
- bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn);
- bootmap_start = round_up(nodedata_phys + pgdat_size, PAGE_SIZE);
- /*
- * SMP_CAHCE_BYTES could be enough, but init_bootmem_node like
- * to use that to align to PAGE_SIZE
- */
- bootmap = early_node_mem(nodeid, bootmap_start, end,
- bootmap_pages<<PAGE_SHIFT, PAGE_SIZE);
- if (bootmap == NULL) {
- if (nodedata_phys < start || nodedata_phys >= end)
- free_bootmem(nodedata_phys, pgdat_size);
- node_data[nodeid] = NULL;
- return;
- }
- bootmap_start = __pa(bootmap);
-
- bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
- bootmap_start >> PAGE_SHIFT,
- start_pfn, end_pfn);
-
- printk(KERN_INFO " bootmap [%016lx - %016lx] pages %lx\n",
- bootmap_start, bootmap_start + bootmap_size - 1,
- bootmap_pages);
-
- free_bootmem_with_active_regions(nodeid, end);
-
- reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size,
- BOOTMEM_DEFAULT);
- reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start,
- bootmap_pages<<PAGE_SHIFT, BOOTMEM_DEFAULT);
-#ifdef CONFIG_ACPI_NUMA
- srat_reserve_add_area(nodeid);
-#endif
- node_set_online(nodeid);
-}
-
-/*
- * There are unfortunately some poorly designed mainboards around that
- * only connect memory to a single CPU. This breaks the 1:1 cpu->node
- * mapping. To avoid this fill in the mapping for all possible CPUs,
- * as the number of CPUs is not known yet. We round robin the existing
- * nodes.
- */
-void __init numa_init_array(void)
-{
- int rr, i;
-
- rr = first_node(node_online_map);
- for (i = 0; i < NR_CPUS; i++) {
- if (early_cpu_to_node(i) != NUMA_NO_NODE)
- continue;
- numa_set_node(i, rr);
- rr = next_node(rr, node_online_map);
- if (rr == MAX_NUMNODES)
- rr = first_node(node_online_map);
- }
-}
-
-#ifdef CONFIG_NUMA_EMU
-/* Numa emulation */
-char *cmdline __initdata;
-
-/*
- * Setups up nid to range from addr to addr + size. If the end
- * boundary is greater than max_addr, then max_addr is used instead.
- * The return value is 0 if there is additional memory left for
- * allocation past addr and -1 otherwise. addr is adjusted to be at
- * the end of the node.
- */
-static int __init setup_node_range(int nid, struct bootnode *nodes, u64 *addr,
- u64 size, u64 max_addr)
-{
- int ret = 0;
-
- nodes[nid].start = *addr;
- *addr += size;
- if (*addr >= max_addr) {
- *addr = max_addr;
- ret = -1;
- }
- nodes[nid].end = *addr;
- node_set(nid, node_possible_map);
- printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid,
- nodes[nid].start, nodes[nid].end,
- (nodes[nid].end - nodes[nid].start) >> 20);
- return ret;
-}
-
-/*
- * Splits num_nodes nodes up equally starting at node_start. The return value
- * is the number of nodes split up and addr is adjusted to be at the end of the
- * last node allocated.
- */
-static int __init split_nodes_equally(struct bootnode *nodes, u64 *addr,
- u64 max_addr, int node_start,
- int num_nodes)
-{
- unsigned int big;
- u64 size;
- int i;
-
- if (num_nodes <= 0)
- return -1;
- if (num_nodes > MAX_NUMNODES)
- num_nodes = MAX_NUMNODES;
- size = (max_addr - *addr - e820_hole_size(*addr, max_addr)) /
- num_nodes;
- /*
- * Calculate the number of big nodes that can be allocated as a result
- * of consolidating the leftovers.
- */
- big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * num_nodes) /
- FAKE_NODE_MIN_SIZE;
-
- /* Round down to nearest FAKE_NODE_MIN_SIZE. */
- size &= FAKE_NODE_MIN_HASH_MASK;
- if (!size) {
- printk(KERN_ERR "Not enough memory for each node. "
- "NUMA emulation disabled.\n");
- return -1;
- }
-
- for (i = node_start; i < num_nodes + node_start; i++) {
- u64 end = *addr + size;
-
- if (i < big)
- end += FAKE_NODE_MIN_SIZE;
- /*
- * The final node can have the remaining system RAM. Other
- * nodes receive roughly the same amount of available pages.
- */
- if (i == num_nodes + node_start - 1)
- end = max_addr;
- else
- while (end - *addr - e820_hole_size(*addr, end) <
- size) {
- end += FAKE_NODE_MIN_SIZE;
- if (end > max_addr) {
- end = max_addr;
- break;
- }
- }
- if (setup_node_range(i, nodes, addr, end - *addr, max_addr) < 0)
- break;
- }
- return i - node_start + 1;
-}
-
-/*
- * Splits the remaining system RAM into chunks of size. The remaining memory is
- * always assigned to a final node and can be asymmetric. Returns the number of
- * nodes split.
- */
-static int __init split_nodes_by_size(struct bootnode *nodes, u64 *addr,
- u64 max_addr, int node_start, u64 size)
-{
- int i = node_start;
- size = (size << 20) & FAKE_NODE_MIN_HASH_MASK;
- while (!setup_node_range(i++, nodes, addr, size, max_addr))
- ;
- return i - node_start;
-}
-
-/*
- * Sets up the system RAM area from start_pfn to end_pfn according to the
- * numa=fake command-line option.
- */
-static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
-{
- struct bootnode nodes[MAX_NUMNODES];
- u64 size, addr = start_pfn << PAGE_SHIFT;
- u64 max_addr = end_pfn << PAGE_SHIFT;
- int num_nodes = 0, num = 0, coeff_flag, coeff = -1, i;
-
- memset(&nodes, 0, sizeof(nodes));
- /*
- * If the numa=fake command-line is just a single number N, split the
- * system RAM into N fake nodes.
- */
- if (!strchr(cmdline, '*') && !strchr(cmdline, ',')) {
- long n = simple_strtol(cmdline, NULL, 0);
-
- num_nodes = split_nodes_equally(nodes, &addr, max_addr, 0, n);
- if (num_nodes < 0)
- return num_nodes;
- goto out;
- }
-
- /* Parse the command line. */
- for (coeff_flag = 0; ; cmdline++) {
- if (*cmdline && isdigit(*cmdline)) {
- num = num * 10 + *cmdline - '0';
- continue;
- }
- if (*cmdline == '*') {
- if (num > 0)
- coeff = num;
- coeff_flag = 1;
- }
- if (!*cmdline || *cmdline == ',') {
- if (!coeff_flag)
- coeff = 1;
- /*
- * Round down to the nearest FAKE_NODE_MIN_SIZE.
- * Command-line coefficients are in megabytes.
- */
- size = ((u64)num << 20) & FAKE_NODE_MIN_HASH_MASK;
- if (size)
- for (i = 0; i < coeff; i++, num_nodes++)
- if (setup_node_range(num_nodes, nodes,
- &addr, size, max_addr) < 0)
- goto done;
- if (!*cmdline)
- break;
- coeff_flag = 0;
- coeff = -1;
- }
- num = 0;
- }
-done:
- if (!num_nodes)
- return -1;
- /* Fill remainder of system RAM, if appropriate. */
- if (addr < max_addr) {
- if (coeff_flag && coeff < 0) {
- /* Split remaining nodes into num-sized chunks */
- num_nodes += split_nodes_by_size(nodes, &addr, max_addr,
- num_nodes, num);
- goto out;
- }
- switch (*(cmdline - 1)) {
- case '*':
- /* Split remaining nodes into coeff chunks */
- if (coeff <= 0)
- break;
- num_nodes += split_nodes_equally(nodes, &addr, max_addr,
- num_nodes, coeff);
- break;
- case ',':
- /* Do not allocate remaining system RAM */
- break;
- default:
- /* Give one final node */
- setup_node_range(num_nodes, nodes, &addr,
- max_addr - addr, max_addr);
- num_nodes++;
- }
- }
-out:
- memnode_shift = compute_hash_shift(nodes, num_nodes);
- if (memnode_shift < 0) {
- memnode_shift = 0;
- printk(KERN_ERR "No NUMA hash function found. NUMA emulation "
- "disabled.\n");
- return -1;
- }
-
- /*
- * We need to vacate all active ranges that may have been registered by
- * SRAT and set acpi_numa to -1 so that srat_disabled() always returns
- * true. NUMA emulation has succeeded so we will not scan ACPI nodes.
- */
- remove_all_active_ranges();
-#ifdef CONFIG_ACPI_NUMA
- acpi_numa = -1;
-#endif
- for_each_node_mask(i, node_possible_map) {
- e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
- nodes[i].end >> PAGE_SHIFT);
- setup_node_bootmem(i, nodes[i].start, nodes[i].end);
- }
- acpi_fake_nodes(nodes, num_nodes);
- numa_init_array();
- return 0;
-}
-#endif /* CONFIG_NUMA_EMU */
-
-void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
-{
- int i;
-
- nodes_clear(node_possible_map);
- nodes_clear(node_online_map);
-
-#ifdef CONFIG_NUMA_EMU
- if (cmdline && !numa_emulation(start_pfn, end_pfn))
- return;
- nodes_clear(node_possible_map);
- nodes_clear(node_online_map);
-#endif
-
-#ifdef CONFIG_ACPI_NUMA
- if (!numa_off && !acpi_scan_nodes(start_pfn << PAGE_SHIFT,
- end_pfn << PAGE_SHIFT))
- return;
- nodes_clear(node_possible_map);
- nodes_clear(node_online_map);
-#endif
-
-#ifdef CONFIG_K8_NUMA
- if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT,
- end_pfn<<PAGE_SHIFT))
- return;
- nodes_clear(node_possible_map);
- nodes_clear(node_online_map);
-#endif
- printk(KERN_INFO "%s\n",
- numa_off ? "NUMA turned off" : "No NUMA configuration found");
-
- printk(KERN_INFO "Faking a node at %016lx-%016lx\n",
- start_pfn << PAGE_SHIFT,
- end_pfn << PAGE_SHIFT);
- /* setup dummy node covering all memory */
- memnode_shift = 63;
- memnodemap = memnode.embedded_map;
- memnodemap[0] = 0;
- node_set_online(0);
- node_set(0, node_possible_map);
- for (i = 0; i < NR_CPUS; i++)
- numa_set_node(i, 0);
- /* cpumask_of_cpu() may not be available during early startup */
- memset(&node_to_cpumask_map[0], 0, sizeof(node_to_cpumask_map[0]));
- cpu_set(0, node_to_cpumask_map[0]);
- e820_register_active_regions(0, start_pfn, end_pfn);
- setup_node_bootmem(0, start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT);
-}
-
-__cpuinit void numa_add_cpu(int cpu)
-{
- set_bit(cpu,
- (unsigned long *)&node_to_cpumask_map[early_cpu_to_node(cpu)]);
-}
-
-void __cpuinit numa_set_node(int cpu, int node)
-{
- int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
-
- cpu_pda(cpu)->nodenumber = node;
-
- if(cpu_to_node_map)
- cpu_to_node_map[cpu] = node;
- else if(per_cpu_offset(cpu))
- per_cpu(x86_cpu_to_node_map, cpu) = node;
- else
- Dprintk(KERN_INFO "Setting node for non-present cpu %d\n", cpu);
-}
-
-unsigned long __init numa_free_all_bootmem(void)
+void __init initmem_init(void)
{
- unsigned long pages = 0;
- int i;
-
- for_each_online_node(i)
- pages += free_all_bootmem_node(NODE_DATA(i));
-
- return pages;
+ x86_numa_init();
}
-
-void __init paging_init(void)
-{
- unsigned long max_zone_pfns[MAX_NR_ZONES];
-
- memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
- max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
- max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
- max_zone_pfns[ZONE_NORMAL] = end_pfn;
-
- sparse_memory_present_with_active_regions(MAX_NUMNODES);
- sparse_init();
-
- free_area_init_nodes(max_zone_pfns);
-}
-
-static __init int numa_setup(char *opt)
-{
- if (!opt)
- return -EINVAL;
- if (!strncmp(opt, "off", 3))
- numa_off = 1;
-#ifdef CONFIG_NUMA_EMU
- if (!strncmp(opt, "fake=", 5))
- cmdline = opt + 5;
-#endif
-#ifdef CONFIG_ACPI_NUMA
- if (!strncmp(opt, "noacpi", 6))
- acpi_numa = -1;
- if (!strncmp(opt, "hotadd=", 7))
- hotadd_percent = simple_strtoul(opt+7, NULL, 10);
-#endif
- return 0;
-}
-early_param("numa", numa_setup);
-
-/*
- * Setup early cpu_to_node.
- *
- * Populate cpu_to_node[] only if x86_cpu_to_apicid[],
- * and apicid_to_node[] tables have valid entries for a CPU.
- * This means we skip cpu_to_node[] initialisation for NUMA
- * emulation and faking node case (when running a kernel compiled
- * for NUMA on a non NUMA box), which is OK as cpu_to_node[]
- * is already initialized in a round robin manner at numa_init_array,
- * prior to this call, and this initialization is good enough
- * for the fake NUMA cases.
- */
-void __init init_cpu_to_node(void)
-{
- int i;
-
- for (i = 0; i < NR_CPUS; i++) {
- int node;
- u16 apicid = x86_cpu_to_apicid_init[i];
-
- if (apicid == BAD_APICID)
- continue;
- node = apicid_to_node[apicid];
- if (node == NUMA_NO_NODE)
- continue;
- if (!node_online(node))
- continue;
- numa_set_node(i, node);
- }
-}
-
-
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