summaryrefslogtreecommitdiffstats
path: root/arch/x86/mm/numa_64.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/mm/numa_64.c')
-rw-r--r--arch/x86/mm/numa_64.c644
1 files changed, 1 insertions, 643 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index e8c00cc7203..dd27f401f0a 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -2,646 +2,13 @@
* 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/memblock.h>
-#include <linux/mmzone.h>
-#include <linux/ctype.h>
-#include <linux/module.h>
-#include <linux/nodemask.h>
-#include <linux/sched.h>
-#include <linux/acpi.h>
-
-#include <asm/e820.h>
-#include <asm/proto.h>
-#include <asm/dma.h>
-#include <asm/acpi.h>
-#include <asm/amd_nb.h>
#include "numa_internal.h"
-struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_data);
-
-nodemask_t numa_nodes_parsed __initdata;
-
-struct memnode memnode;
-
-static unsigned long __initdata nodemap_addr;
-static unsigned long __initdata nodemap_size;
-
-static struct numa_meminfo numa_meminfo __initdata;
-
-static int numa_distance_cnt;
-static u8 *numa_distance;
-
-/*
- * 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 numa_meminfo *mi, int shift)
-{
- unsigned long addr, end;
- int i, res = -1;
-
- memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize);
- for (i = 0; i < mi->nr_blks; i++) {
- addr = mi->blk[i].start;
- end = mi->blk[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] = mi->blk[i].nid;
- 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 = roundup(sizeof(s16) * memnodemapsize, L1_CACHE_BYTES);
- nodemap_addr = memblock_find_in_range(addr, get_max_mapped(),
- nodemap_size, L1_CACHE_BYTES);
- if (nodemap_addr == MEMBLOCK_ERROR) {
- 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);
- memblock_x86_reserve_range(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 numa_meminfo *mi)
-{
- int i, nodes_used = 0;
- unsigned long start, end;
- unsigned long bitfield = 0, memtop = 0;
-
- for (i = 0; i < mi->nr_blks; i++) {
- start = mi->blk[i].start;
- end = mi->blk[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;
-}
-
-static int __init compute_hash_shift(const struct numa_meminfo *mi)
-{
- int shift;
-
- shift = extract_lsb_from_nodes(mi);
- if (allocate_cachealigned_memnodemap())
- return -1;
- printk(KERN_DEBUG "NUMA: Using %d for the hash shift.\n",
- shift);
-
- if (populate_memnodemap(mi, 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 __meminit __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;
-
- /*
- * put it on high as possible
- * something will go with NODE_DATA
- */
- if (start < (MAX_DMA_PFN<<PAGE_SHIFT))
- start = MAX_DMA_PFN<<PAGE_SHIFT;
- if (start < (MAX_DMA32_PFN<<PAGE_SHIFT) &&
- end > (MAX_DMA32_PFN<<PAGE_SHIFT))
- start = MAX_DMA32_PFN<<PAGE_SHIFT;
- mem = memblock_x86_find_in_range_node(nodeid, start, end, size, align);
- if (mem != MEMBLOCK_ERROR)
- return __va(mem);
-
- /* extend the search scope */
- end = max_pfn_mapped << PAGE_SHIFT;
- start = MAX_DMA_PFN << PAGE_SHIFT;
- mem = memblock_find_in_range(start, end, size, align);
- if (mem != MEMBLOCK_ERROR)
- return __va(mem);
-
- printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
- size, nodeid);
-
- return NULL;
-}
-
-static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
- struct numa_meminfo *mi)
-{
- /* ignore zero length blks */
- if (start == end)
- return 0;
-
- /* whine about and ignore invalid blks */
- if (start > end || nid < 0 || nid >= MAX_NUMNODES) {
- pr_warning("NUMA: Warning: invalid memblk node %d (%Lx-%Lx)\n",
- nid, start, end);
- return 0;
- }
-
- if (mi->nr_blks >= NR_NODE_MEMBLKS) {
- pr_err("NUMA: too many memblk ranges\n");
- return -EINVAL;
- }
-
- mi->blk[mi->nr_blks].start = start;
- mi->blk[mi->nr_blks].end = end;
- mi->blk[mi->nr_blks].nid = nid;
- mi->nr_blks++;
- return 0;
-}
-
-/**
- * numa_remove_memblk_from - Remove one numa_memblk from a numa_meminfo
- * @idx: Index of memblk to remove
- * @mi: numa_meminfo to remove memblk from
- *
- * Remove @idx'th numa_memblk from @mi by shifting @mi->blk[] and
- * decrementing @mi->nr_blks.
- */
-void __init numa_remove_memblk_from(int idx, struct numa_meminfo *mi)
-{
- mi->nr_blks--;
- memmove(&mi->blk[idx], &mi->blk[idx + 1],
- (mi->nr_blks - idx) * sizeof(mi->blk[0]));
-}
-
-/**
- * numa_add_memblk - Add one numa_memblk to numa_meminfo
- * @nid: NUMA node ID of the new memblk
- * @start: Start address of the new memblk
- * @end: End address of the new memblk
- *
- * Add a new memblk to the default numa_meminfo.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int __init numa_add_memblk(int nid, u64 start, u64 end)
-{
- return numa_add_memblk_to(nid, start, end, &numa_meminfo);
-}
-
-/* Initialize bootmem allocator for a node */
-void __init
-setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
-{
- unsigned long start_pfn, last_pfn, nodedata_phys;
- const int pgdat_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
- int nid;
-
- if (!end)
- return;
-
- /*
- * Don't confuse VM with a node that doesn't have the
- * minimum amount of memory:
- */
- if (end && (end - start) < NODE_MIN_SIZE)
- return;
-
- start = roundup(start, ZONE_ALIGN);
-
- printk(KERN_INFO "Initmem setup node %d %016lx-%016lx\n", nodeid,
- start, end);
-
- start_pfn = start >> PAGE_SHIFT;
- last_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]);
- memblock_x86_reserve_range(nodedata_phys, nodedata_phys + pgdat_size, "NODE_DATA");
- printk(KERN_INFO " NODE_DATA [%016lx - %016lx]\n", nodedata_phys,
- nodedata_phys + pgdat_size - 1);
- nid = phys_to_nid(nodedata_phys);
- if (nid != nodeid)
- printk(KERN_INFO " NODE_DATA(%d) on node %d\n", nodeid, nid);
-
- memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t));
- NODE_DATA(nodeid)->node_id = nodeid;
- NODE_DATA(nodeid)->node_start_pfn = start_pfn;
- NODE_DATA(nodeid)->node_spanned_pages = last_pfn - start_pfn;
-
- node_set_online(nodeid);
-}
-
-/**
- * numa_cleanup_meminfo - Cleanup a numa_meminfo
- * @mi: numa_meminfo to clean up
- *
- * Sanitize @mi by merging and removing unncessary memblks. Also check for
- * conflicts and clear unused memblks.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int __init numa_cleanup_meminfo(struct numa_meminfo *mi)
-{
- const u64 low = 0;
- const u64 high = (u64)max_pfn << PAGE_SHIFT;
- int i, j, k;
-
- for (i = 0; i < mi->nr_blks; i++) {
- struct numa_memblk *bi = &mi->blk[i];
-
- /* make sure all blocks are inside the limits */
- bi->start = max(bi->start, low);
- bi->end = min(bi->end, high);
-
- /* and there's no empty block */
- if (bi->start == bi->end) {
- numa_remove_memblk_from(i--, mi);
- continue;
- }
-
- for (j = i + 1; j < mi->nr_blks; j++) {
- struct numa_memblk *bj = &mi->blk[j];
- unsigned long start, end;
-
- /*
- * See whether there are overlapping blocks. Whine
- * about but allow overlaps of the same nid. They
- * will be merged below.
- */
- if (bi->end > bj->start && bi->start < bj->end) {
- if (bi->nid != bj->nid) {
- pr_err("NUMA: node %d (%Lx-%Lx) overlaps with node %d (%Lx-%Lx)\n",
- bi->nid, bi->start, bi->end,
- bj->nid, bj->start, bj->end);
- return -EINVAL;
- }
- pr_warning("NUMA: Warning: node %d (%Lx-%Lx) overlaps with itself (%Lx-%Lx)\n",
- bi->nid, bi->start, bi->end,
- bj->start, bj->end);
- }
-
- /*
- * Join together blocks on the same node, holes
- * between which don't overlap with memory on other
- * nodes.
- */
- if (bi->nid != bj->nid)
- continue;
- start = max(min(bi->start, bj->start), low);
- end = min(max(bi->end, bj->end), high);
- for (k = 0; k < mi->nr_blks; k++) {
- struct numa_memblk *bk = &mi->blk[k];
-
- if (bi->nid == bk->nid)
- continue;
- if (start < bk->end && end > bk->start)
- break;
- }
- if (k < mi->nr_blks)
- continue;
- printk(KERN_INFO "NUMA: Node %d [%Lx,%Lx) + [%Lx,%Lx) -> [%lx,%lx)\n",
- bi->nid, bi->start, bi->end, bj->start, bj->end,
- start, end);
- bi->start = start;
- bi->end = end;
- numa_remove_memblk_from(j--, mi);
- }
- }
-
- for (i = mi->nr_blks; i < ARRAY_SIZE(mi->blk); i++) {
- mi->blk[i].start = mi->blk[i].end = 0;
- mi->blk[i].nid = NUMA_NO_NODE;
- }
-
- return 0;
-}
-
-/*
- * Set nodes, which have memory in @mi, in *@nodemask.
- */
-static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask,
- const struct numa_meminfo *mi)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(mi->blk); i++)
- if (mi->blk[i].start != mi->blk[i].end &&
- mi->blk[i].nid != NUMA_NO_NODE)
- node_set(mi->blk[i].nid, *nodemask);
-}
-
-/**
- * numa_reset_distance - Reset NUMA distance table
- *
- * The current table is freed. The next numa_set_distance() call will
- * create a new one.
- */
-void __init numa_reset_distance(void)
-{
- size_t size = numa_distance_cnt * numa_distance_cnt * sizeof(numa_distance[0]);
-
- /* numa_distance could be 1LU marking allocation failure, test cnt */
- if (numa_distance_cnt)
- memblock_x86_free_range(__pa(numa_distance),
- __pa(numa_distance) + size);
- numa_distance_cnt = 0;
- numa_distance = NULL; /* enable table creation */
-}
-
-static int __init numa_alloc_distance(void)
-{
- nodemask_t nodes_parsed;
- size_t size;
- int i, j, cnt = 0;
- u64 phys;
-
- /* size the new table and allocate it */
- nodes_parsed = numa_nodes_parsed;
- numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo);
-
- for_each_node_mask(i, nodes_parsed)
- cnt = i;
- cnt++;
- size = cnt * cnt * sizeof(numa_distance[0]);
-
- phys = memblock_find_in_range(0, (u64)max_pfn_mapped << PAGE_SHIFT,
- size, PAGE_SIZE);
- if (phys == MEMBLOCK_ERROR) {
- pr_warning("NUMA: Warning: can't allocate distance table!\n");
- /* don't retry until explicitly reset */
- numa_distance = (void *)1LU;
- return -ENOMEM;
- }
- memblock_x86_reserve_range(phys, phys + size, "NUMA DIST");
-
- numa_distance = __va(phys);
- numa_distance_cnt = cnt;
-
- /* fill with the default distances */
- for (i = 0; i < cnt; i++)
- for (j = 0; j < cnt; j++)
- numa_distance[i * cnt + j] = i == j ?
- LOCAL_DISTANCE : REMOTE_DISTANCE;
- printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt);
-
- return 0;
-}
-
-/**
- * numa_set_distance - Set NUMA distance from one NUMA to another
- * @from: the 'from' node to set distance
- * @to: the 'to' node to set distance
- * @distance: NUMA distance
- *
- * Set the distance from node @from to @to to @distance. If distance table
- * doesn't exist, one which is large enough to accommodate all the currently
- * known nodes will be created.
- *
- * If such table cannot be allocated, a warning is printed and further
- * calls are ignored until the distance table is reset with
- * numa_reset_distance().
- *
- * If @from or @to is higher than the highest known node at the time of
- * table creation or @distance doesn't make sense, the call is ignored.
- * This is to allow simplification of specific NUMA config implementations.
- */
-void __init numa_set_distance(int from, int to, int distance)
-{
- if (!numa_distance && numa_alloc_distance() < 0)
- return;
-
- if (from >= numa_distance_cnt || to >= numa_distance_cnt) {
- printk_once(KERN_DEBUG "NUMA: Debug: distance out of bound, from=%d to=%d distance=%d\n",
- from, to, distance);
- return;
- }
-
- if ((u8)distance != distance ||
- (from == to && distance != LOCAL_DISTANCE)) {
- pr_warn_once("NUMA: Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
- from, to, distance);
- return;
- }
-
- numa_distance[from * numa_distance_cnt + to] = distance;
-}
-
-int __node_distance(int from, int to)
-{
- if (from >= numa_distance_cnt || to >= numa_distance_cnt)
- return from == to ? LOCAL_DISTANCE : REMOTE_DISTANCE;
- return numa_distance[from * numa_distance_cnt + to];
-}
-EXPORT_SYMBOL(__node_distance);
-
-/*
- * Sanity check to catch more bad NUMA configurations (they are amazingly
- * common). Make sure the nodes cover all memory.
- */
-static bool __init numa_meminfo_cover_memory(const struct numa_meminfo *mi)
-{
- unsigned long numaram, e820ram;
- int i;
-
- numaram = 0;
- for (i = 0; i < mi->nr_blks; i++) {
- unsigned long s = mi->blk[i].start >> PAGE_SHIFT;
- unsigned long e = mi->blk[i].end >> PAGE_SHIFT;
- numaram += e - s;
- numaram -= __absent_pages_in_range(mi->blk[i].nid, s, e);
- if ((long)numaram < 0)
- numaram = 0;
- }
-
- e820ram = max_pfn - (memblock_x86_hole_size(0,
- max_pfn << PAGE_SHIFT) >> PAGE_SHIFT);
- /* We seem to lose 3 pages somewhere. Allow 1M of slack. */
- if ((long)(e820ram - numaram) >= (1 << (20 - PAGE_SHIFT))) {
- printk(KERN_ERR "NUMA: nodes only cover %luMB of your %luMB e820 RAM. Not used.\n",
- (numaram << PAGE_SHIFT) >> 20,
- (e820ram << PAGE_SHIFT) >> 20);
- return false;
- }
- return true;
-}
-
-static int __init numa_register_memblks(struct numa_meminfo *mi)
-{
- int i, nid;
-
- /* Account for nodes with cpus and no memory */
- node_possible_map = numa_nodes_parsed;
- numa_nodemask_from_meminfo(&node_possible_map, mi);
- if (WARN_ON(nodes_empty(node_possible_map)))
- return -EINVAL;
-
- memnode_shift = compute_hash_shift(mi);
- if (memnode_shift < 0) {
- printk(KERN_ERR "NUMA: No NUMA node hash function found. Contact maintainer\n");
- return -EINVAL;
- }
-
- for (i = 0; i < mi->nr_blks; i++)
- memblock_x86_register_active_regions(mi->blk[i].nid,
- mi->blk[i].start >> PAGE_SHIFT,
- mi->blk[i].end >> PAGE_SHIFT);
-
- /* for out of order entries */
- sort_node_map();
- if (!numa_meminfo_cover_memory(mi))
- return -EINVAL;
-
- /* Finally register nodes. */
- for_each_node_mask(nid, node_possible_map) {
- u64 start = (u64)max_pfn << PAGE_SHIFT;
- u64 end = 0;
-
- for (i = 0; i < mi->nr_blks; i++) {
- if (nid != mi->blk[i].nid)
- continue;
- start = min(mi->blk[i].start, start);
- end = max(mi->blk[i].end, end);
- }
-
- if (start < end)
- setup_node_bootmem(nid, start, end);
- }
-
- return 0;
-}
-
-/**
- * dummy_numma_init - Fallback dummy NUMA init
- *
- * Used if there's no underlying NUMA architecture, NUMA initialization
- * fails, or NUMA is disabled on the command line.
- *
- * Must online at least one node and add memory blocks that cover all
- * allowed memory. This function must not fail.
- */
-static int __init dummy_numa_init(void)
-{
- printk(KERN_INFO "%s\n",
- numa_off ? "NUMA turned off" : "No NUMA configuration found");
- printk(KERN_INFO "Faking a node at %016lx-%016lx\n",
- 0LU, max_pfn << PAGE_SHIFT);
-
- node_set(0, numa_nodes_parsed);
- numa_add_memblk(0, 0, (u64)max_pfn << PAGE_SHIFT);
-
- return 0;
-}
-
-static int __init numa_init(int (*init_func)(void))
-{
- int i;
- int ret;
-
- for (i = 0; i < MAX_LOCAL_APIC; i++)
- set_apicid_to_node(i, NUMA_NO_NODE);
-
- nodes_clear(numa_nodes_parsed);
- nodes_clear(node_possible_map);
- nodes_clear(node_online_map);
- memset(&numa_meminfo, 0, sizeof(numa_meminfo));
- remove_all_active_ranges();
- numa_reset_distance();
-
- ret = init_func();
- if (ret < 0)
- return ret;
- ret = numa_cleanup_meminfo(&numa_meminfo);
- if (ret < 0)
- return ret;
-
- numa_emulation(&numa_meminfo, numa_distance_cnt);
-
- ret = numa_register_memblks(&numa_meminfo);
- if (ret < 0)
- return ret;
-
- for (i = 0; i < nr_cpu_ids; i++) {
- int nid = early_cpu_to_node(i);
-
- if (nid == NUMA_NO_NODE)
- continue;
- if (!node_online(nid))
- numa_clear_node(i);
- }
- numa_init_array();
- return 0;
-}
-
void __init initmem_init(void)
{
- int ret;
-
- if (!numa_off) {
-#ifdef CONFIG_ACPI_NUMA
- ret = numa_init(x86_acpi_numa_init);
- if (!ret)
- return;
-#endif
-#ifdef CONFIG_AMD_NUMA
- ret = numa_init(amd_numa_init);
- if (!ret)
- return;
-#endif
- }
-
- numa_init(dummy_numa_init);
+ x86_numa_init();
}
unsigned long __init numa_free_all_bootmem(void)
@@ -656,12 +23,3 @@ unsigned long __init numa_free_all_bootmem(void)
return pages;
}
-
-int __cpuinit numa_cpu_node(int cpu)
-{
- int apicid = early_per_cpu(x86_cpu_to_apicid, cpu);
-
- if (apicid != BAD_APICID)
- return __apicid_to_node[apicid];
- return NUMA_NO_NODE;
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 21:32:52 +0000