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-rw-r--r--arch/x86/mm/numa_64.c274
1 files changed, 124 insertions, 150 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 3d6926ba8995..dc3b1f7e1451 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -1,7 +1,7 @@
-/*
+/*
* 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>
@@ -11,35 +11,45 @@
#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>
#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;
-unsigned char cpu_to_node[NR_CPUS] __read_mostly = {
+int x86_cpu_to_node_map_init[NR_CPUS] = {
[0 ... NR_CPUS-1] = NUMA_NO_NODE
};
-unsigned char apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
- [0 ... MAX_LOCAL_APIC-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[MAX_NUMNODES] __read_mostly;
+
+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 :
@@ -47,14 +57,13 @@ unsigned long __initdata nodemap_size;
* 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)
+static int __init populate_memnodemap(const struct bootnode *nodes,
+ int numnodes, int shift)
{
- int i;
- int res = -1;
unsigned long addr, end;
+ int i, res = -1;
- memset(memnodemap, 0xff, memnodemapsize);
+ memset(memnodemap, 0xff, sizeof(s16)*memnodemapsize);
for (i = 0; i < numnodes; i++) {
addr = nodes[i].start;
end = nodes[i].end;
@@ -63,13 +72,13 @@ populate_memnodemap(const struct bootnode *nodes, int numnodes, int shift)
if ((end >> shift) >= memnodemapsize)
return 0;
do {
- if (memnodemap[addr >> shift] != 0xff)
+ if (memnodemap[addr >> shift] != NUMA_NO_NODE)
return -1;
memnodemap[addr >> shift] = i;
addr += (1UL << shift);
} while (addr < end);
res = 1;
- }
+ }
return res;
}
@@ -78,12 +87,12 @@ static int __init allocate_cachealigned_memnodemap(void)
unsigned long pad, pad_addr;
memnodemap = memnode.embedded_map;
- if (memnodemapsize <= 48)
+ if (memnodemapsize <= ARRAY_SIZE(memnode.embedded_map))
return 0;
pad = L1_CACHE_BYTES - 1;
pad_addr = 0x8000;
- nodemap_size = pad + memnodemapsize;
+ nodemap_size = pad + sizeof(s16) * memnodemapsize;
nodemap_addr = find_e820_area(pad_addr, end_pfn<<PAGE_SHIFT,
nodemap_size);
if (nodemap_addr == -1UL) {
@@ -94,6 +103,7 @@ static int __init allocate_cachealigned_memnodemap(void)
}
pad_addr = (nodemap_addr + pad) & ~pad;
memnodemap = phys_to_virt(pad_addr);
+ reserve_early(nodemap_addr, nodemap_addr + nodemap_size);
printk(KERN_DEBUG "NUMA: Allocated memnodemap from %lx - %lx\n",
nodemap_addr, nodemap_addr + nodemap_size);
@@ -104,8 +114,8 @@ static int __init allocate_cachealigned_memnodemap(void)
* 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)
+static int __init extract_lsb_from_nodes(const struct bootnode *nodes,
+ int numnodes)
{
int i, nodes_used = 0;
unsigned long start, end;
@@ -140,51 +150,50 @@ int __init compute_hash_shift(struct bootnode *nodes, int numnodes)
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);
+ 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)
+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 == NULL) {
printk(KERN_ERR "Cannot find %lu bytes in node %d\n",
- size, nodeid);
+ 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 __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);
+ start = round_up(start, ZONE_ALIGN);
- printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid, start, end);
+ printk(KERN_INFO "Bootmem setup node %d %016lx-%016lx\n", nodeid,
+ start, end);
start_pfn = start >> PAGE_SHIFT;
end_pfn = end >> PAGE_SHIFT;
@@ -200,75 +209,55 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
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_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);
+ 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);
-
+ 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);
+ 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);
+ 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
-}
+}
+/*
+ * 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;
- /* 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)
+ if (early_cpu_to_node(i) != NUMA_NO_NODE)
continue;
- numa_set_node(i, rr);
+ 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
@@ -276,15 +265,17 @@ void __init numa_init_array(void)
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.
+ * 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) {
@@ -335,6 +326,7 @@ static int __init split_nodes_equally(struct bootnode *nodes, u64 *addr,
for (i = node_start; i < num_nodes + node_start; i++) {
u64 end = *addr + size;
+
if (i < big)
end += FAKE_NODE_MIN_SIZE;
/*
@@ -380,14 +372,9 @@ static int __init split_nodes_by_size(struct bootnode *nodes, u64 *addr,
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 size, 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;
+ int num_nodes = 0, num = 0, coeff_flag, coeff = -1, i;
memset(&nodes, 0, sizeof(nodes));
/*
@@ -395,8 +382,9 @@ static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
* 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));
+ 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;
@@ -483,46 +471,47 @@ out:
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);
+ setup_node_bootmem(i, nodes[i].start, nodes[i].end);
}
acpi_fake_nodes(nodes, num_nodes);
- numa_init_array();
- return 0;
+ 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);
#ifdef CONFIG_NUMA_EMU
if (cmdline && !numa_emulation(start_pfn, end_pfn))
- return;
+ 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;
+ 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))
+ 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",
+ 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;
+ 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);
@@ -530,36 +519,48 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
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);
+ /* 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, &node_to_cpumask[cpu_to_node(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;
- cpu_to_node(cpu) = 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)
-{
- int i;
+unsigned long __init numa_free_all_bootmem(void)
+{
unsigned long pages = 0;
- for_each_online_node(i) {
+ int i;
+
+ 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;
@@ -568,32 +569,27 @@ void __init paging_init(void)
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))
+ 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))
+ 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);
/*
@@ -611,38 +607,16 @@ early_param("numa", numa_setup);
void __init init_cpu_to_node(void)
{
int i;
- for (i = 0; i < NR_CPUS; i++) {
- u8 apicid = x86_cpu_to_apicid_init[i];
+
+ for (i = 0; i < NR_CPUS; i++) {
+ u16 apicid = x86_cpu_to_apicid_init[i];
+
if (apicid == BAD_APICID)
continue;
if (apicid_to_node[apicid] == NUMA_NO_NODE)
continue;
- numa_set_node(i,apicid_to_node[apicid]);
+ 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
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.