diff options
Diffstat (limited to 'arch/x86_64/mm/numa.c')
| -rw-r--r-- | arch/x86_64/mm/numa.c | 647 |
1 files changed, 0 insertions, 647 deletions
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c deleted file mode 100644 index 51548947ad3..00000000000 --- a/arch/x86_64/mm/numa.c +++ /dev/null @@ -1,647 +0,0 @@ -/* - * 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 <asm/e820.h> -#include <asm/proto.h> -#include <asm/dma.h> -#include <asm/numa.h> -#include <asm/acpi.h> - -#ifndef Dprintk -#define Dprintk(x...) -#endif - -struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; -bootmem_data_t plat_node_bdata[MAX_NUMNODES]; - -struct memnode memnode; - -unsigned char cpu_to_node[NR_CPUS] __read_mostly = { - [0 ... NR_CPUS-1] = NUMA_NO_NODE -}; -unsigned char apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = { - [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE -}; -cpumask_t node_to_cpumask[MAX_NUMNODES] __read_mostly; - -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) -{ - int i; - int res = -1; - unsigned long addr, end; - - memset(memnodemap, 0xff, 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] != 0xff) - 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 pad, pad_addr; - - memnodemap = memnode.embedded_map; - if (memnodemapsize <= 48) - return 0; - - pad = L1_CACHE_BYTES - 1; - pad_addr = 0x8000; - nodemap_size = pad + memnodemapsize; - nodemap_addr = find_e820_area(pad_addr, end_pfn<<PAGE_SHIFT, - nodemap_size); - if (nodemap_addr == -1UL) { - printk(KERN_ERR - "NUMA: Unable to allocate Memory to Node hash map\n"); - nodemap_addr = nodemap_size = 0; - return -1; - } - pad_addr = (nodemap_addr + pad) & ~pad; - memnodemap = phys_to_virt(pad_addr); - - 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; -} - -#ifdef CONFIG_SPARSEMEM -int early_pfn_to_nid(unsigned long pfn) -{ - return phys_to_nid(pfn << PAGE_SHIFT); -} -#endif - -static void * __init -early_node_mem(int nodeid, unsigned long start, unsigned long end, - unsigned long size) -{ - unsigned long mem = find_e820_area(start, end, size); - void *ptr; - if (mem != -1L) - return __va(mem); - ptr = __alloc_bootmem_nopanic(size, - SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)); - if (ptr == 0) { - 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, bootmap_start; - unsigned long 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); - if (node_data[nodeid] == NULL) - return; - nodedata_phys = __pa(node_data[nodeid]); - - 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); - bootmap = early_node_mem(nodeid, bootmap_start, end, - bootmap_pages<<PAGE_SHIFT); - if (bootmap == NULL) { - if (nodedata_phys < start || nodedata_phys >= end) - free_bootmem((unsigned long)node_data[nodeid],pgdat_size); - node_data[nodeid] = NULL; - return; - } - bootmap_start = __pa(bootmap); - Dprintk("bootmap start %lu pages %lu\n", bootmap_start, bootmap_pages); - - bootmap_size = init_bootmem_node(NODE_DATA(nodeid), - bootmap_start >> PAGE_SHIFT, - start_pfn, end_pfn); - - free_bootmem_with_active_regions(nodeid, end); - - reserve_bootmem_node(NODE_DATA(nodeid), nodedata_phys, pgdat_size); - reserve_bootmem_node(NODE_DATA(nodeid), bootmap_start, bootmap_pages<<PAGE_SHIFT); -#ifdef CONFIG_ACPI_NUMA - srat_reserve_add_area(nodeid); -#endif - node_set_online(nodeid); -} - -/* Initialize final allocator for a zone */ -void __init setup_node_zones(int nodeid) -{ - unsigned long start_pfn, end_pfn, memmapsize, limit; - - start_pfn = node_start_pfn(nodeid); - end_pfn = node_end_pfn(nodeid); - - Dprintk(KERN_INFO "Setting up memmap for node %d %lx-%lx\n", - nodeid, start_pfn, end_pfn); - - /* Try to allocate mem_map at end to not fill up precious <4GB - memory. */ - memmapsize = sizeof(struct page) * (end_pfn-start_pfn); - limit = end_pfn << PAGE_SHIFT; -#ifdef CONFIG_FLAT_NODE_MEM_MAP - NODE_DATA(nodeid)->node_mem_map = - __alloc_bootmem_core(NODE_DATA(nodeid)->bdata, - memmapsize, SMP_CACHE_BYTES, - round_down(limit - memmapsize, PAGE_SIZE), - limit); -#endif -} - -void __init numa_init_array(void) -{ - int rr, i; - /* 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. */ - rr = first_node(node_online_map); - for (i = 0; i < NR_CPUS; i++) { - if (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 */ -#define E820_ADDR_HOLE_SIZE(start, end) \ - (e820_hole_size((start) >> PAGE_SHIFT, (end) >> PAGE_SHIFT) << \ - PAGE_SHIFT) -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_ADDR_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_ADDR_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 addr = start_pfn << PAGE_SHIFT; - u64 max_addr = end_pfn << PAGE_SHIFT; - int num_nodes = 0; - int coeff_flag; - int coeff = -1; - int num = 0; - u64 size; - int 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, ',')) { - num_nodes = split_nodes_equally(nodes, &addr, max_addr, 0, - simple_strtol(cmdline, NULL, 0)); - 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. - */ - remove_all_active_ranges(); - 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); - } - numa_init_array(); - return 0; -} -#undef E820_ADDR_HOLE_SIZE -#endif /* CONFIG_NUMA_EMU */ - -void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn) -{ - int i; - - nodes_clear(node_possible_map); - -#ifdef CONFIG_NUMA_EMU - if (cmdline && !numa_emulation(start_pfn, end_pfn)) - return; - nodes_clear(node_possible_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); -#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); -#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; - nodes_clear(node_online_map); - node_set_online(0); - node_set(0, node_possible_map); - for (i = 0; i < NR_CPUS; i++) - numa_set_node(i, 0); - node_to_cpumask[0] = cpumask_of_cpu(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, &node_to_cpumask[cpu_to_node(cpu)]); -} - -void __cpuinit numa_set_node(int cpu, int node) -{ - cpu_pda(cpu)->nodenumber = node; - cpu_to_node[cpu] = node; -} - -unsigned long __init numa_free_all_bootmem(void) -{ - int i; - unsigned long pages = 0; - for_each_online_node(i) { - pages += free_all_bootmem_node(NODE_DATA(i)); - } - return pages; -} - -void __init paging_init(void) -{ - int i; - 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(); - - for_each_online_node(i) { - setup_node_zones(i); - } - - 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++) { - u8 apicid = x86_cpu_to_apicid[i]; - if (apicid == BAD_APICID) - continue; - if (apicid_to_node[apicid] == NUMA_NO_NODE) - continue; - numa_set_node(i,apicid_to_node[apicid]); - } -} - -EXPORT_SYMBOL(cpu_to_node); -EXPORT_SYMBOL(node_to_cpumask); -EXPORT_SYMBOL(memnode); -EXPORT_SYMBOL(node_data); - -#ifdef CONFIG_DISCONTIGMEM -/* - * Functions to convert PFNs from/to per node page addresses. - * These are out of line because they are quite big. - * They could be all tuned by pre caching more state. - * Should do that. - */ - -int pfn_valid(unsigned long pfn) -{ - unsigned nid; - if (pfn >= num_physpages) - return 0; - nid = pfn_to_nid(pfn); - if (nid == 0xff) - return 0; - return pfn >= node_start_pfn(nid) && (pfn) < node_end_pfn(nid); -} -EXPORT_SYMBOL(pfn_valid); -#endif |