1 files changed, 74 insertions, 338 deletions

diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 01161077a49c..0d1e7ac439f4 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -13,145 +13,46 @@
 #include <asm/mpspec.h>
 #include <asm/apicdef.h>
 #include <asm/highmem.h>
+#include <asm/proto.h>
+#include <asm/cpumask.h>
+#include <asm/cpu.h>
 
-#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;
-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 */
-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
-
-/* 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 */
-cpumask_t *node_to_cpumask_map;
-EXPORT_SYMBOL(node_to_cpumask_map);
-
-/* setup node_to_cpumask_map */
-static void __init setup_node_to_cpumask_map(void);
-
+#ifdef CONFIG_DEBUG_PER_CPU_MAPS
+# define DBG(x...) printk(KERN_DEBUG x)
 #else
-static inline void setup_node_to_cpumask_map(void) { }
+# define DBG(x...)
 #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;
+DEFINE_PER_CPU(int, cpu_number);
+EXPORT_PER_CPU_SYMBOL(cpu_number);
 
-        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);
+#ifdef CONFIG_X86_64
+#define BOOT_PERCPU_OFFSET ((unsigned long)__per_cpu_load)
+#else
+#define BOOT_PERCPU_OFFSET 0
 #endif
-        }
 
-        /* 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
-}
+DEFINE_PER_CPU(unsigned long, this_cpu_off) = BOOT_PERCPU_OFFSET;
+EXPORT_PER_CPU_SYMBOL(this_cpu_off);
 
-#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;
+unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
+        [0 ... NR_CPUS-1] = BOOT_PERCPU_OFFSET,
+};
 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_SMP && CONFIG_X86_64 */
-
-/*
- * Allocate cpu_pda pointer table and array via alloc_bootmem.
- */
-static void __init setup_cpu_pda_map(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;
-        }
-
-        /* 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;
-        }
-
-        /* point to new pointer table */
-        _cpu_pda = new_cpu_pda;
-}
-
-#endif /* CONFIG_SMP && CONFIG_X86_64 */
-
-#ifdef CONFIG_X86_64
-
-/* correctly size the local cpu masks */
-static void __init setup_cpu_local_masks(void)
+static inline void setup_percpu_segment(int cpu)
 {
-        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);
-}
-
-#else /* CONFIG_X86_32 */
+#ifdef CONFIG_X86_32
+        struct desc_struct gdt;
 
-static inline void setup_cpu_local_masks(void)
-{
+        pack_descriptor(&gdt, per_cpu_offset(cpu), 0xFFFFF,
+                        0x2 | DESCTYPE_S, 0x8);
+        gdt.s = 1;
+        write_gdt_entry(get_cpu_gdt_table(cpu),
+                        GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S);
+#endif
 }
 
-#endif /* CONFIG_X86_32 */
-
 /*
  * Great future plan:
  * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data.
@@ -159,18 +60,12 @@ static inline void setup_cpu_local_masks(void)
  */
 void __init setup_per_cpu_areas(void)
 {
-        ssize_t size, old_size;
+        ssize_t size;
         char *ptr;
         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);
+        size = roundup(PERCPU_ENOUGH_ROOM, PAGE_SIZE);
 
         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);
@@ -179,30 +74,67 @@ void __init setup_per_cpu_areas(void)
 
         for_each_possible_cpu(cpu) {
 #ifndef CONFIG_NEED_MULTIPLE_NODES
-                ptr = __alloc_bootmem(size, align,
-                                 __pa(MAX_DMA_ADDRESS));
+                ptr = alloc_bootmem_pages(size);
 #else
                 int node = early_cpu_to_node(cpu);
                 if (!node_online(node) || !NODE_DATA(node)) {
-                        ptr = __alloc_bootmem(size, align,
-                                         __pa(MAX_DMA_ADDRESS));
+                        ptr = alloc_bootmem_pages(size);
                         pr_info("cpu %d has no node %d or node-local memory\n",
                                 cpu, node);
                         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));
+                        ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
                         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;
+                setup_percpu_segment(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.
+                 */
+#ifdef CONFIG_X86_LOCAL_APIC
+                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);
+#endif
+#ifdef CONFIG_X86_64
+                per_cpu(irq_stack_ptr, cpu) =
+                        per_cpu(irq_stack_union.irq_stack, cpu) +
+                        IRQ_STACK_SIZE - 64;
+#ifdef CONFIG_NUMA
+                per_cpu(x86_cpu_to_node_map, cpu) =
+                        early_per_cpu_map(x86_cpu_to_node_map, cpu);
+#endif
+#endif
+                /*
+                 * Up to this point, the boot CPU has been using .data.init
+                 * area.  Reload any changed state for the boot CPU.
+                 */
+                if (cpu == boot_cpu_id)
+                        switch_to_new_gdt();
+
+                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 */
+#ifdef CONFIG_X86_LOCAL_APIC
+        early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
+        early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
+#endif
+#if defined(CONFIG_X86_64) && defined(CONFIG_NUMA)
+        early_per_cpu_ptr(x86_cpu_to_node_map) = NULL;
+#endif
 
         /* Setup node to cpumask map */
         setup_node_to_cpumask_map();
@@ -210,199 +142,3 @@ void __init setup_per_cpu_areas(void)
         /* Setup cpu initialized, callin, callout masks */
         setup_cpu_local_masks();
 }
-
-#endif
-
-#ifdef X86_64_NUMA
-
-/*
- * Allocate node_to_cpumask_map based on number of available nodes
- * Requires node_possible_map to be valid.
- *
- * Note: node_to_cpumask() is not valid until after this is done.
- */
-static void __init setup_node_to_cpumask_map(void)
-{
-        unsigned int node, num = 0;
-        cpumask_t *map;
-
-        /* setup nr_node_ids if not done yet */
-        if (nr_node_ids == MAX_NUMNODES) {
-                for_each_node_mask(node, node_possible_map)
-                        num = node;
-                nr_node_ids = num + 1;
-        }
-
-        /* allocate the map */
-        map = alloc_bootmem_low(nr_node_ids * sizeof(cpumask_t));
-
-        pr_debug("Node to cpumask map at %p for %d nodes\n",
-                 map, nr_node_ids);
-
-        /* node_to_cpumask() will now work */
-        node_to_cpumask_map = map;
-}
-
-void __cpuinit numa_set_node(int cpu, int node)
-{
-        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)
-                cpu_to_node_map[cpu] = node;
-
-        else if (per_cpu_offset(cpu))
-                per_cpu(x86_cpu_to_node_map, cpu) = node;
-
-        else
-                pr_debug("Setting node for non-present cpu %d\n", cpu);
-}
-
-void __cpuinit numa_clear_node(int cpu)
-{
-        numa_set_node(cpu, NUMA_NO_NODE);
-}
-
-#ifndef CONFIG_DEBUG_PER_CPU_MAPS
-
-void __cpuinit numa_add_cpu(int cpu)
-{
-        cpu_set(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
-}
-
-void __cpuinit numa_remove_cpu(int cpu)
-{
-        cpu_clear(cpu, node_to_cpumask_map[cpu_to_node(cpu)]);
-}
-
-#else /* CONFIG_DEBUG_PER_CPU_MAPS */
-
-/*
- * --------- debug versions of the numa functions ---------
- */
-static void __cpuinit numa_set_cpumask(int cpu, int enable)
-{
-        int node = cpu_to_node(cpu);
-        cpumask_t *mask;
-        char buf[64];
-
-        if (node_to_cpumask_map == NULL) {
-                printk(KERN_ERR "node_to_cpumask_map NULL\n");
-                dump_stack();
-                return;
-        }
-
-        mask = &node_to_cpumask_map[node];
-        if (enable)
-                cpu_set(cpu, *mask);
-        else
-                cpu_clear(cpu, *mask);
-
-        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);
-}
-
-void __cpuinit numa_add_cpu(int cpu)
-{
-        numa_set_cpumask(cpu, 1);
-}
-
-void __cpuinit numa_remove_cpu(int cpu)
-{
-        numa_set_cpumask(cpu, 0);
-}
-
-int cpu_to_node(int cpu)
-{
-        if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
-                printk(KERN_WARNING
-                        "cpu_to_node(%d): usage too early!\n", cpu);
-                dump_stack();
-                return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
-        }
-        return per_cpu(x86_cpu_to_node_map, cpu);
-}
-EXPORT_SYMBOL(cpu_to_node);
-
-/*
- * Same function as cpu_to_node() but used if called before the
- * per_cpu areas are setup.
- */
-int early_cpu_to_node(int cpu)
-{
-        if (early_per_cpu_ptr(x86_cpu_to_node_map))
-                return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
-
-        if (!per_cpu_offset(cpu)) {
-                printk(KERN_WARNING
-                        "early_cpu_to_node(%d): no per_cpu area!\n", cpu);
-                dump_stack();
-                return NUMA_NO_NODE;
-        }
-        return per_cpu(x86_cpu_to_node_map, cpu);
-}
-
-
-/* empty cpumask */
-static const cpumask_t cpu_mask_none;
-
-/*
- * Returns a pointer to the bitmask of CPUs on Node 'node'.
- */
-const cpumask_t *cpumask_of_node(int node)
-{
-        if (node_to_cpumask_map == NULL) {
-                printk(KERN_WARNING
-                        "cpumask_of_node(%d): no node_to_cpumask_map!\n",
-                        node);
-                dump_stack();
-                return (const cpumask_t *)&cpu_online_map;
-        }
-        if (node >= nr_node_ids) {
-                printk(KERN_WARNING
-                        "cpumask_of_node(%d): node > nr_node_ids(%d)\n",
-                        node, nr_node_ids);
-                dump_stack();
-                return &cpu_mask_none;
-        }
-        return &node_to_cpumask_map[node];
-}
-EXPORT_SYMBOL(cpumask_of_node);
-
-/*
- * Returns a bitmask of CPUs on Node 'node'.
- *
- * Side note: this function creates the returned cpumask on the stack
- * so with a high NR_CPUS count, excessive stack space is used.  The
- * node_to_cpumask_ptr function should be used whenever possible.
- */
-cpumask_t node_to_cpumask(int node)
-{
-        if (node_to_cpumask_map == NULL) {
-                printk(KERN_WARNING
-                        "node_to_cpumask(%d): no node_to_cpumask_map!\n", node);
-                dump_stack();
-                return cpu_online_map;
-        }
-        if (node >= nr_node_ids) {
-                printk(KERN_WARNING
-                        "node_to_cpumask(%d): node > nr_node_ids(%d)\n",
-                        node, nr_node_ids);
-                dump_stack();
-                return cpu_mask_none;
-        }
-        return node_to_cpumask_map[node];
-}
-EXPORT_SYMBOL(node_to_cpumask);
-
-/*
- * --------- end of debug versions of the numa functions ---------
- */
-
-#endif /* CONFIG_DEBUG_PER_CPU_MAPS */
-
-#endif /* X86_64_NUMA */
-