#include <linux/percpu.h>
#include <linux/kexec.h>
#include <linux/crash_dump.h>
-#include <asm/smp.h>
-#include <asm/percpu.h>
+#include <linux/smp.h>
+#include <linux/topology.h>
#include <asm/sections.h>
#include <asm/processor.h>
#include <asm/setup.h>
-#include <asm/topology.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/highmem.h>
+#include <asm/proto.h>
+#include <asm/cpumask.h>
+
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+# define DBG(x...) printk(KERN_DEBUG x)
+#else
+# define DBG(x...)
+#endif
+
+/*
+ * Could be inside CONFIG_HAVE_SETUP_PER_CPU_AREA with other stuff but
+ * voyager wants cpu_number too.
+ */
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(int, cpu_number);
+EXPORT_PER_CPU_SYMBOL(cpu_number);
+#endif
#ifdef CONFIG_X86_LOCAL_APIC
unsigned int num_processors;
unsigned disabled_cpus __cpuinitdata;
/* Processor that is doing the boot up */
unsigned int boot_cpu_physical_apicid = -1U;
-unsigned int max_physical_apicid;
EXPORT_SYMBOL(boot_cpu_physical_apicid);
+unsigned int max_physical_apicid;
/* Bitmask of physically existing CPUs */
physid_mask_t phys_cpu_present_map;
#endif
-/* map cpu index to physical APIC ID */
+/*
+ * Map cpu index to physical APIC ID
+ */
DEFINE_EARLY_PER_CPU(u16, x86_cpu_to_apicid, BAD_APICID);
DEFINE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid, BAD_APICID);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
-#define X86_64_NUMA 1
+#define X86_64_NUMA 1 /* (used later) */
+DEFINE_PER_CPU(int, node_number) = 0;
+EXPORT_PER_CPU_SYMBOL(node_number);
-/* map cpu index to node index */
+/*
+ * Map cpu index to node index
+ */
DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
-/* which logical CPUs are on which nodes */
+/*
+ * Which logical CPUs are on which nodes
+ */
cpumask_t *node_to_cpumask_map;
EXPORT_SYMBOL(node_to_cpumask_map);
-/* setup node_to_cpumask_map */
+/*
+ * Setup node_to_cpumask_map
+ */
static void __init setup_node_to_cpumask_map(void);
#else
static inline void setup_node_to_cpumask_map(void) { }
#endif
-#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP)
-/*
- * Copy data used in early init routines from the initial arrays to the
- * per cpu data areas. These arrays then become expendable and the
- * *_early_ptr's are zeroed indicating that the static arrays are gone.
- */
-static void __init setup_per_cpu_maps(void)
-{
- int cpu;
-
- for_each_possible_cpu(cpu) {
- per_cpu(x86_cpu_to_apicid, cpu) =
- early_per_cpu_map(x86_cpu_to_apicid, cpu);
- per_cpu(x86_bios_cpu_apicid, cpu) =
- early_per_cpu_map(x86_bios_cpu_apicid, cpu);
-#ifdef X86_64_NUMA
- per_cpu(x86_cpu_to_node_map, cpu) =
- early_per_cpu_map(x86_cpu_to_node_map, cpu);
-#endif
- }
+#ifdef CONFIG_X86_64
- /* indicate the early static arrays will soon be gone */
- early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
- early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
-#ifdef X86_64_NUMA
- early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
-#endif
+/* correctly size the local cpu masks */
+static void setup_cpu_local_masks(void)
+{
+ alloc_bootmem_cpumask_var(&cpu_initialized_mask);
+ alloc_bootmem_cpumask_var(&cpu_callin_mask);
+ alloc_bootmem_cpumask_var(&cpu_callout_mask);
+ alloc_bootmem_cpumask_var(&cpu_sibling_setup_mask);
}
-#ifdef CONFIG_X86_32
-/*
- * Great future not-so-futuristic plan: make i386 and x86_64 do it
- * the same way
- */
-unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
-EXPORT_SYMBOL(__per_cpu_offset);
-static inline void setup_cpu_pda_map(void) { }
-
-#elif !defined(CONFIG_SMP)
-static inline void setup_cpu_pda_map(void) { }
+#else /* CONFIG_X86_32 */
-#else /* CONFIG_SMP && CONFIG_X86_64 */
-
-/*
- * Allocate cpu_pda pointer table and array via alloc_bootmem.
- */
-static void __init setup_cpu_pda_map(void)
+static inline void setup_cpu_local_masks(void)
{
- char *pda;
- struct x8664_pda **new_cpu_pda;
- unsigned long size;
- int cpu;
-
- size = roundup(sizeof(struct x8664_pda), cache_line_size());
-
- /* allocate cpu_pda array and pointer table */
- {
- unsigned long tsize = nr_cpu_ids * sizeof(void *);
- unsigned long asize = size * (nr_cpu_ids - 1);
+}
- tsize = roundup(tsize, cache_line_size());
- new_cpu_pda = alloc_bootmem(tsize + asize);
- pda = (char *)new_cpu_pda + tsize;
- }
+#endif /* CONFIG_X86_32 */
- /* initialize pointer table to static pda's */
- for_each_possible_cpu(cpu) {
- if (cpu == 0) {
- /* leave boot cpu pda in place */
- new_cpu_pda[0] = cpu_pda(0);
- continue;
- }
- new_cpu_pda[cpu] = (struct x8664_pda *)pda;
- new_cpu_pda[cpu]->in_bootmem = 1;
- pda += size;
- }
+#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
- /* point to new pointer table */
- _cpu_pda = new_cpu_pda;
-}
+#ifdef CONFIG_X86_64
+unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
+ [0] = (unsigned long)__per_cpu_load,
+};
+#else
+unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
#endif
+EXPORT_SYMBOL(__per_cpu_offset);
/*
* Great future plan:
int cpu;
unsigned long align = 1;
- /* Setup cpu_pda map */
- setup_cpu_pda_map();
-
/* Copy section for each CPU (we discard the original) */
old_size = PERCPU_ENOUGH_ROOM;
align = max_t(unsigned long, PAGE_SIZE, align);
size = roundup(old_size, align);
- printk(KERN_INFO
- "NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
+ pr_info("NR_CPUS:%d nr_cpumask_bits:%d nr_cpu_ids:%d nr_node_ids:%d\n",
NR_CPUS, nr_cpumask_bits, nr_cpu_ids, nr_node_ids);
- printk(KERN_INFO "PERCPU: Allocating %zd bytes of per cpu data\n",
- size);
+ pr_info("PERCPU: Allocating %zd bytes of per cpu data\n", size);
for_each_possible_cpu(cpu) {
#ifndef CONFIG_NEED_MULTIPLE_NODES
if (!node_online(node) || !NODE_DATA(node)) {
ptr = __alloc_bootmem(size, align,
__pa(MAX_DMA_ADDRESS));
- printk(KERN_INFO
- "cpu %d has no node %d or node-local memory\n",
+ pr_info("cpu %d has no node %d or node-local memory\n",
cpu, node);
- if (ptr)
- printk(KERN_DEBUG
- "per cpu data for cpu%d at %016lx\n",
- cpu, __pa(ptr));
- }
- else {
+ pr_debug("per cpu data for cpu%d at %016lx\n",
+ cpu, __pa(ptr));
+ } else {
ptr = __alloc_bootmem_node(NODE_DATA(node), size, align,
__pa(MAX_DMA_ADDRESS));
- if (ptr)
- printk(KERN_DEBUG
- "per cpu data for cpu%d on node%d "
- "at %016lx\n",
- cpu, node, __pa(ptr));
+ pr_debug("per cpu data for cpu%d on node%d at %016lx\n",
+ cpu, node, __pa(ptr));
}
#endif
+
+ memcpy(ptr, __per_cpu_load, __per_cpu_end - __per_cpu_start);
per_cpu_offset(cpu) = ptr - __per_cpu_start;
- memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+ per_cpu(this_cpu_off, cpu) = per_cpu_offset(cpu);
+ per_cpu(cpu_number, cpu) = cpu;
+ /*
+ * Copy data used in early init routines from the initial arrays to the
+ * per cpu data areas. These arrays then become expendable and the
+ * *_early_ptr's are zeroed indicating that the static arrays are gone.
+ */
+ per_cpu(x86_cpu_to_apicid, cpu) =
+ early_per_cpu_map(x86_cpu_to_apicid, cpu);
+ per_cpu(x86_bios_cpu_apicid, cpu) =
+ early_per_cpu_map(x86_bios_cpu_apicid, cpu);
+#ifdef X86_64_NUMA
+ per_cpu(x86_cpu_to_node_map, cpu) =
+ early_per_cpu_map(x86_cpu_to_node_map, cpu);
+#endif
+#ifdef CONFIG_X86_64
+ per_cpu(irq_stack_ptr, cpu) =
+ per_cpu(irq_stack_union.irq_stack, cpu) + IRQ_STACK_SIZE - 64;
+ /*
+ * Up to this point, CPU0 has been using .data.init
+ * area. Reload %gs offset for CPU0.
+ */
+ if (cpu == 0)
+ load_gs_base(cpu);
+#endif
+
+ DBG("PERCPU: cpu %4d %p\n", cpu, ptr);
}
- /* Setup percpu data maps */
- setup_per_cpu_maps();
+ /* indicate the early static arrays will soon be gone */
+ early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
+ early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
+#ifdef X86_64_NUMA
+ early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
+#endif
/* Setup node to cpumask map */
setup_node_to_cpumask_map();
+
+ /* Setup cpu initialized, callin, callout masks */
+ setup_cpu_local_masks();
}
#endif
* Requires node_possible_map to be valid.
*
* Note: node_to_cpumask() is not valid until after this is done.
+ * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
*/
static void __init setup_node_to_cpumask_map(void)
{
/* allocate the map */
map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t));
+ DBG("node_to_cpumask_map at %p for %d nodes\n", map, nr_node_ids);
pr_debug("Node to cpumask map at %p for %d nodes\n",
map, nr_node_ids);
{
int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
- if (cpu_pda(cpu) && node != NUMA_NO_NODE)
- cpu_pda(cpu)->nodenumber = node;
-
- if (cpu_to_node_map)
+ /* early setting, no percpu area yet */
+ if (cpu_to_node_map) {
cpu_to_node_map[cpu] = node;
+ return;
+ }
- else if (per_cpu_offset(cpu))
- per_cpu(x86_cpu_to_node_map, cpu) = node;
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+ if (cpu >= nr_cpu_ids || !per_cpu_offset(cpu)) {
+ printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
+ dump_stack();
+ return;
+ }
+#endif
+ per_cpu(x86_cpu_to_node_map, cpu) = node;
- else
- pr_debug("Setting node for non-present cpu %d\n", cpu);
+ if (node != NUMA_NO_NODE)
+ per_cpu(node_number, cpu) = node;
}
void __cpuinit numa_clear_node(int cpu)
void __cpuinit numa_remove_cpu(int cpu)
{
- cpu_clear(cpu, node_to_cpumask_map[cpu_to_node(cpu)]);
+ cpu_clear(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
}
#else /* CONFIG_DEBUG_PER_CPU_MAPS */
*/
static void __cpuinit numa_set_cpumask(int cpu, int enable)
{
- int node = cpu_to_node(cpu);
+ int node = early_cpu_to_node(cpu);
cpumask_t *mask;
char buf[64];
cpulist_scnprintf(buf, sizeof(buf), mask);
printk(KERN_DEBUG "%s cpu %d node %d: mask now %s\n",
- enable? "numa_add_cpu":"numa_remove_cpu", cpu, node, buf);
- }
+ enable ? "numa_add_cpu" : "numa_remove_cpu", cpu, node, buf);
+}
void __cpuinit numa_add_cpu(int cpu)
{
projects / ~andy / linux / blobdiff