#include <asm/e820.h>
#include <asm/proto.h>
#include <asm/dma.h>
-#include <asm/numa.h>
#include <asm/acpi.h>
#include <asm/amd_nb.h>
-struct numa_memblk {
- u64 start;
- u64 end;
- int nid;
-};
-
-struct numa_meminfo {
- int nr_blks;
- struct numa_memblk blk[NR_NODE_MEMBLKS];
-};
+#include "numa_internal.h"
struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_data);
static int numa_distance_cnt;
static u8 *numa_distance;
-#ifdef CONFIG_NUMA_EMU
-static bool numa_emu_dist;
-#endif
-
/*
* Given a shift value, try to populate memnodemap[]
* Returns :
return 0;
}
-static void __init numa_remove_memblk_from(int idx, struct numa_meminfo *mi)
+/**
+ * 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);
node_set_online(nodeid);
}
-static int __init numa_cleanup_meminfo(struct numa_meminfo *mi)
+/**
+ * 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;
node_set(mi->blk[i].nid, *nodemask);
}
-/*
- * Reset distance table. The current table is freed. The next
- * numa_set_distance() call will create a new one.
+/**
+ * numa_reset_distance - Reset NUMA distance table
+ *
+ * The current table is freed. The next numa_set_distance() call will
+ * create a new one.
*/
-static void __init numa_reset_distance(void)
+void __init numa_reset_distance(void)
{
- size_t size;
+ size_t size = numa_distance_cnt * numa_distance_cnt * sizeof(numa_distance[0]);
- size = numa_distance_cnt * sizeof(numa_distance[0]);
- memblock_x86_free_range(__pa(numa_distance),
- __pa(numa_distance) + size);
- numa_distance = NULL;
+ /* 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 */
}
-/*
- * Set the distance between node @from to @to to @distance. If distance
- * table doesn't exist, one which is large enough to accomodate all the
- * currently known nodes will be created.
- */
-void __init numa_set_distance(int from, int to, int distance)
+static int __init numa_alloc_distance(void)
{
- if (!numa_distance) {
- 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;
- size = ++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;
- }
- memblock_x86_reserve_range(phys, phys + size, "NUMA DIST");
+ 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;
+ 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);
- }
+ /* 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",
int __node_distance(int from, int to)
{
-#if defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA_EMU)
- if (numa_emu_dist)
- return acpi_emu_node_distance(from, to);
-#endif
if (from >= numa_distance_cnt || to >= numa_distance_cnt)
return from == to ? LOCAL_DISTANCE : REMOTE_DISTANCE;
return numa_distance[from * numa_distance_cnt + to];
static int __init numa_register_memblks(struct numa_meminfo *mi)
{
- int i, j, nid;
+ int i, nid;
/* Account for nodes with cpus and no memory */
node_possible_map = numa_nodes_parsed;
if (!numa_meminfo_cover_memory(mi))
return -EINVAL;
- init_memory_mapping_high();
-
- /*
- * Finally register nodes. Do it twice in case setup_node_bootmem
- * missed one due to missing bootmem.
- */
- for (i = 0; i < 2; i++) {
- for_each_node_mask(nid, node_possible_map) {
- u64 start = (u64)max_pfn << PAGE_SHIFT;
- u64 end = 0;
+ /* Finally register nodes. */
+ for_each_node_mask(nid, node_possible_map) {
+ u64 start = (u64)max_pfn << PAGE_SHIFT;
+ u64 end = 0;
- if (node_online(nid))
+ for (i = 0; i < mi->nr_blks; i++) {
+ if (nid != mi->blk[i].nid)
continue;
-
- for (j = 0; j < mi->nr_blks; j++) {
- if (nid != mi->blk[j].nid)
- continue;
- start = min(mi->blk[j].start, start);
- end = max(mi->blk[j].end, end);
- }
-
- if (start < end)
- setup_node_bootmem(nid, start, end);
- }
- }
-
- return 0;
-}
-
-#ifdef CONFIG_NUMA_EMU
-/* Numa emulation */
-static int emu_nid_to_phys[MAX_NUMNODES] __cpuinitdata;
-static char *emu_cmdline __initdata;
-
-void __init numa_emu_cmdline(char *str)
-{
- emu_cmdline = str;
-}
-
-static int __init emu_find_memblk_by_nid(int nid, const struct numa_meminfo *mi)
-{
- int i;
-
- for (i = 0; i < mi->nr_blks; i++)
- if (mi->blk[i].nid == nid)
- return i;
- return -ENOENT;
-}
-
-int __init find_node_by_addr(unsigned long addr)
-{
- const struct numa_meminfo *mi = &numa_meminfo;
- int i;
-
- for (i = 0; i < mi->nr_blks; i++) {
- /*
- * Find the real node that this emulated node appears on. For
- * the sake of simplicity, we only use a real node's starting
- * address to determine which emulated node it appears on.
- */
- if (addr >= mi->blk[i].start && addr < mi->blk[i].end)
- return mi->blk[i].nid;
- }
- return NUMA_NO_NODE;
-}
-
-static void __init fake_physnodes(int acpi, int amd,
- const struct numa_meminfo *ei)
-{
- static struct bootnode nodes[MAX_NUMNODES] __initdata;
- int i, nr_nodes = 0;
-
- for (i = 0; i < ei->nr_blks; i++) {
- int nid = ei->blk[i].nid;
-
- if (nodes[nid].start == nodes[nid].end) {
- nodes[nid].start = ei->blk[i].start;
- nodes[nid].end = ei->blk[i].end;
- nr_nodes++;
- } else {
- nodes[nid].start = min(ei->blk[i].start, nodes[nid].start);
- nodes[nid].end = max(ei->blk[i].end, nodes[nid].end);
+ start = min(mi->blk[i].start, start);
+ end = max(mi->blk[i].end, end);
}
- }
-
- BUG_ON(acpi && amd);
-#ifdef CONFIG_ACPI_NUMA
- if (acpi)
- acpi_fake_nodes(nodes, nr_nodes);
-#endif
-#ifdef CONFIG_AMD_NUMA
- if (amd)
- amd_fake_nodes(nodes, nr_nodes);
-#endif
- if (!acpi && !amd)
- for (i = 0; i < nr_cpu_ids; i++)
- numa_set_node(i, 0);
-}
-
-/*
- * Sets up nid to range from @start to @end. The return value is -errno if
- * something went wrong, 0 otherwise.
- */
-static int __init emu_setup_memblk(struct numa_meminfo *ei,
- struct numa_meminfo *pi,
- int nid, int phys_blk, u64 size)
-{
- struct numa_memblk *eb = &ei->blk[ei->nr_blks];
- struct numa_memblk *pb = &pi->blk[phys_blk];
-
- if (ei->nr_blks >= NR_NODE_MEMBLKS) {
- pr_err("NUMA: Too many emulated memblks, failing emulation\n");
- return -EINVAL;
- }
-
- ei->nr_blks++;
- eb->start = pb->start;
- eb->end = pb->start + size;
- eb->nid = nid;
-
- if (emu_nid_to_phys[nid] == NUMA_NO_NODE)
- emu_nid_to_phys[nid] = pb->nid;
-
- pb->start += size;
- if (pb->start >= pb->end) {
- WARN_ON_ONCE(pb->start > pb->end);
- numa_remove_memblk_from(phys_blk, pi);
- }
-
- printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid,
- eb->start, eb->end, (eb->end - eb->start) >> 20);
- return 0;
-}
-/*
- * Sets up nr_nodes fake nodes interleaved over physical nodes ranging from addr
- * to max_addr. The return value is the number of nodes allocated.
- */
-static int __init split_nodes_interleave(struct numa_meminfo *ei,
- struct numa_meminfo *pi,
- u64 addr, u64 max_addr, int nr_nodes)
-{
- nodemask_t physnode_mask = NODE_MASK_NONE;
- u64 size;
- int big;
- int nid = 0;
- int i, ret;
-
- if (nr_nodes <= 0)
- return -1;
- if (nr_nodes > MAX_NUMNODES) {
- pr_info("numa=fake=%d too large, reducing to %d\n",
- nr_nodes, MAX_NUMNODES);
- nr_nodes = MAX_NUMNODES;
+ if (start < end)
+ setup_node_bootmem(nid, start, end);
}
- size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) / nr_nodes;
- /*
- * Calculate the number of big nodes that can be allocated as a result
- * of consolidating the remainder.
- */
- big = ((size & ~FAKE_NODE_MIN_HASH_MASK) * nr_nodes) /
- FAKE_NODE_MIN_SIZE;
-
- size &= FAKE_NODE_MIN_HASH_MASK;
- if (!size) {
- pr_err("Not enough memory for each node. "
- "NUMA emulation disabled.\n");
- return -1;
- }
-
- for (i = 0; i < pi->nr_blks; i++)
- node_set(pi->blk[i].nid, physnode_mask);
-
- /*
- * Continue to fill physical nodes with fake nodes until there is no
- * memory left on any of them.
- */
- while (nodes_weight(physnode_mask)) {
- for_each_node_mask(i, physnode_mask) {
- u64 dma32_end = PFN_PHYS(MAX_DMA32_PFN);
- u64 start, limit, end;
- int phys_blk;
-
- phys_blk = emu_find_memblk_by_nid(i, pi);
- if (phys_blk < 0) {
- node_clear(i, physnode_mask);
- continue;
- }
- start = pi->blk[phys_blk].start;
- limit = pi->blk[phys_blk].end;
- end = start + size;
-
- if (nid < big)
- end += FAKE_NODE_MIN_SIZE;
-
- /*
- * Continue to add memory to this fake node if its
- * non-reserved memory is less than the per-node size.
- */
- while (end - start -
- memblock_x86_hole_size(start, end) < size) {
- end += FAKE_NODE_MIN_SIZE;
- if (end > limit) {
- end = limit;
- break;
- }
- }
-
- /*
- * If there won't be at least FAKE_NODE_MIN_SIZE of
- * non-reserved memory in ZONE_DMA32 for the next node,
- * this one must extend to the boundary.
- */
- if (end < dma32_end && dma32_end - end -
- memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
- end = dma32_end;
-
- /*
- * If there won't be enough non-reserved memory for the
- * next node, this one must extend to the end of the
- * physical node.
- */
- if (limit - end -
- memblock_x86_hole_size(end, limit) < size)
- end = limit;
-
- ret = emu_setup_memblk(ei, pi, nid++ % nr_nodes,
- phys_blk,
- min(end, limit) - start);
- if (ret < 0)
- return ret;
- }
- }
return 0;
}
-/*
- * Returns the end address of a node so that there is at least `size' amount of
- * non-reserved memory or `max_addr' is reached.
- */
-static u64 __init find_end_of_node(u64 start, u64 max_addr, u64 size)
-{
- u64 end = start + size;
-
- while (end - start - memblock_x86_hole_size(start, end) < size) {
- end += FAKE_NODE_MIN_SIZE;
- if (end > max_addr) {
- end = max_addr;
- break;
- }
- }
- return end;
-}
-
-/*
- * Sets up fake nodes of `size' interleaved over physical nodes ranging from
- * `addr' to `max_addr'. The return value is the number of nodes allocated.
+/**
+ * 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 split_nodes_size_interleave(struct numa_meminfo *ei,
- struct numa_meminfo *pi,
- u64 addr, u64 max_addr, u64 size)
+static int __init dummy_numa_init(void)
{
- nodemask_t physnode_mask = NODE_MASK_NONE;
- u64 min_size;
- int nid = 0;
- int i, ret;
-
- if (!size)
- return -1;
- /*
- * The limit on emulated nodes is MAX_NUMNODES, so the size per node is
- * increased accordingly if the requested size is too small. This
- * creates a uniform distribution of node sizes across the entire
- * machine (but not necessarily over physical nodes).
- */
- min_size = (max_addr - addr - memblock_x86_hole_size(addr, max_addr)) /
- MAX_NUMNODES;
- min_size = max(min_size, FAKE_NODE_MIN_SIZE);
- if ((min_size & FAKE_NODE_MIN_HASH_MASK) < min_size)
- min_size = (min_size + FAKE_NODE_MIN_SIZE) &
- FAKE_NODE_MIN_HASH_MASK;
- if (size < min_size) {
- pr_err("Fake node size %LuMB too small, increasing to %LuMB\n",
- size >> 20, min_size >> 20);
- size = min_size;
- }
- size &= FAKE_NODE_MIN_HASH_MASK;
-
- for (i = 0; i < pi->nr_blks; i++)
- node_set(pi->blk[i].nid, physnode_mask);
-
- /*
- * Fill physical nodes with fake nodes of size until there is no memory
- * left on any of them.
- */
- while (nodes_weight(physnode_mask)) {
- for_each_node_mask(i, physnode_mask) {
- u64 dma32_end = MAX_DMA32_PFN << PAGE_SHIFT;
- u64 start, limit, end;
- int phys_blk;
-
- phys_blk = emu_find_memblk_by_nid(i, pi);
- if (phys_blk < 0) {
- node_clear(i, physnode_mask);
- continue;
- }
- start = pi->blk[phys_blk].start;
- limit = pi->blk[phys_blk].end;
+ 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);
- end = find_end_of_node(start, limit, size);
- /*
- * If there won't be at least FAKE_NODE_MIN_SIZE of
- * non-reserved memory in ZONE_DMA32 for the next node,
- * this one must extend to the boundary.
- */
- if (end < dma32_end && dma32_end - end -
- memblock_x86_hole_size(end, dma32_end) < FAKE_NODE_MIN_SIZE)
- end = dma32_end;
+ node_set(0, numa_nodes_parsed);
+ numa_add_memblk(0, 0, (u64)max_pfn << PAGE_SHIFT);
- /*
- * If there won't be enough non-reserved memory for the
- * next node, this one must extend to the end of the
- * physical node.
- */
- if (limit - end -
- memblock_x86_hole_size(end, limit) < size)
- end = limit;
-
- ret = emu_setup_memblk(ei, pi, nid++ % MAX_NUMNODES,
- phys_blk,
- min(end, limit) - start);
- if (ret < 0)
- return ret;
- }
- }
return 0;
}
-/*
- * Sets up the system RAM area from start_pfn to last_pfn according to the
- * numa=fake command-line option.
- */
-static bool __init numa_emulation(int acpi, int amd)
+static int __init numa_init(int (*init_func)(void))
{
- static struct numa_meminfo ei __initdata;
- static struct numa_meminfo pi __initdata;
- const u64 max_addr = max_pfn << PAGE_SHIFT;
- int i, ret;
+ int i;
+ int ret;
- memset(&ei, 0, sizeof(ei));
- pi = numa_meminfo;
+ for (i = 0; i < MAX_LOCAL_APIC; i++)
+ set_apicid_to_node(i, NUMA_NO_NODE);
- for (i = 0; i < MAX_NUMNODES; i++)
- emu_nid_to_phys[i] = NUMA_NO_NODE;
-
- /*
- * If the numa=fake command-line contains a 'M' or 'G', it represents
- * the fixed node size. Otherwise, if it is just a single number N,
- * split the system RAM into N fake nodes.
- */
- if (strchr(emu_cmdline, 'M') || strchr(emu_cmdline, 'G')) {
- u64 size;
-
- size = memparse(emu_cmdline, &emu_cmdline);
- ret = split_nodes_size_interleave(&ei, &pi, 0, max_addr, size);
- } else {
- unsigned long n;
-
- n = simple_strtoul(emu_cmdline, NULL, 0);
- ret = split_nodes_interleave(&ei, &pi, 0, max_addr, n);
- }
+ 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 false;
-
- if (numa_cleanup_meminfo(&ei) < 0) {
- pr_warning("NUMA: Warning: constructed meminfo invalid, disabling emulation\n");
- return false;
- }
-
- /* commit */
- numa_meminfo = ei;
-
- /* make sure all emulated nodes are mapped to a physical node */
- for (i = 0; i < ARRAY_SIZE(emu_nid_to_phys); i++)
- if (emu_nid_to_phys[i] == NUMA_NO_NODE)
- emu_nid_to_phys[i] = 0;
+ return ret;
+ ret = numa_cleanup_meminfo(&numa_meminfo);
+ if (ret < 0)
+ return ret;
- fake_physnodes(acpi, amd, &ei);
- numa_emu_dist = true;
- return true;
-}
-#endif /* CONFIG_NUMA_EMU */
+ numa_emulation(&numa_meminfo, numa_distance_cnt);
-static int 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);
+ ret = numa_register_memblks(&numa_meminfo);
+ if (ret < 0)
+ return ret;
- node_set(0, numa_nodes_parsed);
- numa_add_memblk(0, 0, (u64)max_pfn << PAGE_SHIFT);
+ 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 (*numa_init[])(void) = { [2] = dummy_numa_init };
- int i, j;
+ int ret;
if (!numa_off) {
#ifdef CONFIG_ACPI_NUMA
- numa_init[0] = x86_acpi_numa_init;
+ ret = numa_init(x86_acpi_numa_init);
+ if (!ret)
+ return;
#endif
#ifdef CONFIG_AMD_NUMA
- numa_init[1] = amd_numa_init;
+ ret = numa_init(amd_numa_init);
+ if (!ret)
+ return;
#endif
}
- for (i = 0; i < ARRAY_SIZE(numa_init); i++) {
- if (!numa_init[i])
- continue;
-
- for (j = 0; j < MAX_LOCAL_APIC; j++)
- set_apicid_to_node(j, 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();
-
- if (numa_init[i]() < 0)
- continue;
-
- if (numa_cleanup_meminfo(&numa_meminfo) < 0)
- continue;
-#ifdef CONFIG_NUMA_EMU
- /*
- * If requested, try emulation. If emulation is not used,
- * build identity emu_nid_to_phys[] for numa_add_cpu()
- */
- if (!emu_cmdline || !numa_emulation(i == 0, i == 1))
- for (j = 0; j < ARRAY_SIZE(emu_nid_to_phys); j++)
- emu_nid_to_phys[j] = j;
-#endif
- if (numa_register_memblks(&numa_meminfo) < 0)
- continue;
-
- for (j = 0; j < nr_cpu_ids; j++) {
- int nid = early_cpu_to_node(j);
-
- if (nid == NUMA_NO_NODE)
- continue;
- if (!node_online(nid))
- numa_clear_node(j);
- }
- numa_init_array();
- return;
- }
- BUG();
+ numa_init(dummy_numa_init);
}
unsigned long __init numa_free_all_bootmem(void)
return __apicid_to_node[apicid];
return NUMA_NO_NODE;
}
-
-/*
- * UGLINESS AHEAD: Currently, CONFIG_NUMA_EMU is 64bit only and makes use
- * of 64bit specific data structures. The distinction is artificial and
- * should be removed. numa_{add|remove}_cpu() are implemented in numa.c
- * for both 32 and 64bit when CONFIG_NUMA_EMU is disabled but here when
- * enabled.
- *
- * NUMA emulation is planned to be made generic and the following and other
- * related code should be moved to numa.c.
- */
-#ifdef CONFIG_NUMA_EMU
-# ifndef CONFIG_DEBUG_PER_CPU_MAPS
-void __cpuinit numa_add_cpu(int cpu)
-{
- int physnid, nid;
-
- nid = numa_cpu_node(cpu);
- if (nid == NUMA_NO_NODE)
- nid = early_cpu_to_node(cpu);
- BUG_ON(nid == NUMA_NO_NODE || !node_online(nid));
-
- physnid = emu_nid_to_phys[nid];
-
- /*
- * Map the cpu to each emulated node that is allocated on the physical
- * node of the cpu's apic id.
- */
- for_each_online_node(nid)
- if (emu_nid_to_phys[nid] == physnid)
- cpumask_set_cpu(cpu, node_to_cpumask_map[nid]);
-}
-
-void __cpuinit numa_remove_cpu(int cpu)
-{
- int i;
-
- for_each_online_node(i)
- cpumask_clear_cpu(cpu, node_to_cpumask_map[i]);
-}
-# else /* !CONFIG_DEBUG_PER_CPU_MAPS */
-static void __cpuinit numa_set_cpumask(int cpu, int enable)
-{
- struct cpumask *mask;
- int nid, physnid, i;
-
- nid = early_cpu_to_node(cpu);
- if (nid == NUMA_NO_NODE) {
- /* early_cpu_to_node() already emits a warning and trace */
- return;
- }
-
- physnid = emu_nid_to_phys[nid];
-
- for_each_online_node(i) {
- if (emu_nid_to_phys[nid] != physnid)
- continue;
-
- mask = debug_cpumask_set_cpu(cpu, enable);
- if (!mask)
- return;
-
- if (enable)
- cpumask_set_cpu(cpu, mask);
- else
- cpumask_clear_cpu(cpu, mask);
- }
-}
-
-void __cpuinit numa_add_cpu(int cpu)
-{
- numa_set_cpumask(cpu, 1);
-}
-
-void __cpuinit numa_remove_cpu(int cpu)
-{
- numa_set_cpumask(cpu, 0);
-}
-# endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
-#endif /* CONFIG_NUMA_EMU */
git.openpandora.org / pandora-kernel.git / blobdiff