Merge branch 'linus' into x86/xen

Conflicts:
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/process_64.c
	arch/x86/xen/enlighten.c

1 files changed, 684 insertions, 289 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 9983bc3f5d1..fb789dd9e69 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1,28 +1,62 @@
 #include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
 #include <linux/string.h>
+#include <linux/bootmem.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/kgdb.h>
+#include <linux/topology.h>
 #include <linux/delay.h>
 #include <linux/smp.h>
-#include <linux/module.h>
 #include <linux/percpu.h>
-#include <linux/bootmem.h>
-#include <asm/processor.h>
 #include <asm/i387.h>
 #include <asm/msr.h>
 #include <asm/io.h>
+#include <asm/linkage.h>
 #include <asm/mmu_context.h>
 #include <asm/mtrr.h>
 #include <asm/mce.h>
 #include <asm/pat.h>
 #include <asm/asm.h>
+#include <asm/numa.h>
 #ifdef CONFIG_X86_LOCAL_APIC
 #include <asm/mpspec.h>
 #include <asm/apic.h>
 #include <mach_apic.h>
+#include <asm/genapic.h>
 #endif
 
+#include <asm/pda.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/desc.h>
+#include <asm/atomic.h>
+#include <asm/proto.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+
 #include "cpu.h"
 
+static struct cpu_dev *this_cpu __cpuinitdata;
+
+#ifdef CONFIG_X86_64
+/* We need valid kernel segments for data and code in long mode too
+ * IRET will check the segment types  kkeil 2000/10/28
+ * Also sysret mandates a special GDT layout
+ */
+/* The TLS descriptors are currently at a different place compared to i386.
+   Hopefully nobody expects them at a fixed place (Wine?) */
 DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
+	[GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
+	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
+	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
+	[GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
+	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
+	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
+} };
+#else
+DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
 	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
 	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
 	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
@@ -56,17 +90,150 @@ DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
 	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
 	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
 } };
+#endif
 EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
 
-__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
-
+#ifdef CONFIG_X86_32
 static int cachesize_override __cpuinitdata = -1;
 static int disable_x86_serial_nr __cpuinitdata = 1;
 
-struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
+static int __init cachesize_setup(char *str)
+{
+	get_option(&str, &cachesize_override);
+	return 1;
+}
+__setup("cachesize=", cachesize_setup);
+
+static int __init x86_fxsr_setup(char *s)
+{
+	setup_clear_cpu_cap(X86_FEATURE_FXSR);
+	setup_clear_cpu_cap(X86_FEATURE_XMM);
+	return 1;
+}
+__setup("nofxsr", x86_fxsr_setup);
+
+static int __init x86_sep_setup(char *s)
+{
+	setup_clear_cpu_cap(X86_FEATURE_SEP);
+	return 1;
+}
+__setup("nosep", x86_sep_setup);
+
+/* Standard macro to see if a specific flag is changeable */
+static inline int flag_is_changeable_p(u32 flag)
+{
+	u32 f1, f2;
+
+	asm("pushfl\n\t"
+	    "pushfl\n\t"
+	    "popl %0\n\t"
+	    "movl %0,%1\n\t"
+	    "xorl %2,%0\n\t"
+	    "pushl %0\n\t"
+	    "popfl\n\t"
+	    "pushfl\n\t"
+	    "popl %0\n\t"
+	    "popfl\n\t"
+	    : "=&r" (f1), "=&r" (f2)
+	    : "ir" (flag));
+
+	return ((f1^f2) & flag) != 0;
+}
+
+/* Probe for the CPUID instruction */
+static int __cpuinit have_cpuid_p(void)
+{
+	return flag_is_changeable_p(X86_EFLAGS_ID);
+}
+
+static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
+{
+	if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr) {
+		/* Disable processor serial number */
+		unsigned long lo, hi;
+		rdmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
+		lo |= 0x200000;
+		wrmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
+		printk(KERN_NOTICE "CPU serial number disabled.\n");
+		clear_cpu_cap(c, X86_FEATURE_PN);
+
+		/* Disabling the serial number may affect the cpuid level */
+		c->cpuid_level = cpuid_eax(0);
+	}
+}
+
+static int __init x86_serial_nr_setup(char *s)
+{
+	disable_x86_serial_nr = 0;
+	return 1;
+}
+__setup("serialnumber", x86_serial_nr_setup);
+#else
+static inline int flag_is_changeable_p(u32 flag)
+{
+	return 1;
+}
+/* Probe for the CPUID instruction */
+static inline int have_cpuid_p(void)
+{
+	return 1;
+}
+static inline void squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
+{
+}
+#endif
+
+/*
+ * Naming convention should be: <Name> [(<Codename>)]
+ * This table only is used unless init_<vendor>() below doesn't set it;
+ * in particular, if CPUID levels 0x80000002..4 are supported, this isn't used
+ *
+ */
+
+/* Look up CPU names by table lookup. */
+static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
+{
+	struct cpu_model_info *info;
+
+	if (c->x86_model >= 16)
+		return NULL;	/* Range check */
+
+	if (!this_cpu)
+		return NULL;
+
+	info = this_cpu->c_models;
+
+	while (info && info->family) {
+		if (info->family == c->x86)
+			return info->model_names[c->x86_model];
+		info++;
+	}
+	return NULL;		/* Not found */
+}
+
+__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
+
+/* Current gdt points %fs at the "master" per-cpu area: after this,
+ * it's on the real one. */
+void switch_to_new_gdt(void)
+{
+	struct desc_ptr gdt_descr;
+
+	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
+	gdt_descr.size = GDT_SIZE - 1;
+	load_gdt(&gdt_descr);
+#ifdef CONFIG_X86_32
+	asm("mov %0, %%fs" : : "r" (__KERNEL_PERCPU) : "memory");
+#endif
+}
+
+static struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
 
 static void __cpuinit default_init(struct cpuinfo_x86 *c)
 {
+#ifdef CONFIG_X86_64
+	display_cacheinfo(c);
+#else
 	/* Not much we can do here... */
 	/* Check if at least it has cpuid */
 	if (c->cpuid_level == -1) {
@@ -76,28 +243,22 @@ static void __cpuinit default_init(struct cpuinfo_x86 *c)
 		else if (c->x86 == 3)
 			strcpy(c->x86_model_id, "386");
 	}
+#endif
 }
 
 static struct cpu_dev __cpuinitdata default_cpu = {
 	.c_init	= default_init,
 	.c_vendor = "Unknown",
+	.c_x86_vendor = X86_VENDOR_UNKNOWN,
 };
-static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
 
-static int __init cachesize_setup(char *str)
-{
-	get_option(&str, &cachesize_override);
-	return 1;
-}
-__setup("cachesize=", cachesize_setup);
-
-int __cpuinit get_model_name(struct cpuinfo_x86 *c)
+static void __cpuinit get_model_name(struct cpuinfo_x86 *c)
 {
 	unsigned int *v;
 	char *p, *q;
 
-	if (cpuid_eax(0x80000000) < 0x80000004)
-		return 0;
+	if (c->extended_cpuid_level < 0x80000004)
+		return;
 
 	v = (unsigned int *) c->x86_model_id;
 	cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
@@ -116,30 +277,34 @@ int __cpuinit get_model_name(struct cpuinfo_x86 *c)
 	     while (q <= &c->x86_model_id[48])
 		  *q++ = '\0';	/* Zero-pad the rest */
 	}
-
-	return 1;
 }
 
-
 void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 {
-	unsigned int n, dummy, ecx, edx, l2size;
+	unsigned int n, dummy, ebx, ecx, edx, l2size;
 
-	n = cpuid_eax(0x80000000);
+	n = c->extended_cpuid_level;
 
 	if (n >= 0x80000005) {
-		cpuid(0x80000005, &dummy, &dummy, &ecx, &edx);
+		cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
 		printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
-			edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
-		c->x86_cache_size = (ecx>>24)+(edx>>24);
+				edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
+		c->x86_cache_size = (ecx>>24) + (edx>>24);
+#ifdef CONFIG_X86_64
+		/* On K8 L1 TLB is inclusive, so don't count it */
+		c->x86_tlbsize = 0;
+#endif
 	}
 
 	if (n < 0x80000006)	/* Some chips just has a large L1. */
 		return;
 
-	ecx = cpuid_ecx(0x80000006);
+	cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 	l2size = ecx >> 16;
 
+#ifdef CONFIG_X86_64
+	c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
+#else
 	/* do processor-specific cache resizing */
 	if (this_cpu->c_size_cache)
 		l2size = this_cpu->c_size_cache(c, l2size);
@@ -150,116 +315,106 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 
 	if (l2size == 0)
 		return;		/* Again, no L2 cache is possible */
+#endif
 
 	c->x86_cache_size = l2size;
 
 	printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
-	       l2size, ecx & 0xFF);
+			l2size, ecx & 0xFF);
 }
 
-/*
- * Naming convention should be: <Name> [(<Codename>)]
- * This table only is used unless init_<vendor>() below doesn't set it;
- * in particular, if CPUID levels 0x80000002..4 are supported, this isn't used
- *
- */
-
-/* Look up CPU names by table lookup. */
-static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
+void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 {
-	struct cpu_model_info *info;
+#ifdef CONFIG_X86_HT
+	u32 eax, ebx, ecx, edx;
+	int index_msb, core_bits;
 
-	if (c->x86_model >= 16)
-		return NULL;	/* Range check */
+	if (!cpu_has(c, X86_FEATURE_HT))
+		return;
 
-	if (!this_cpu)
-		return NULL;
+	if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
+		goto out;
 
-	info = this_cpu->c_models;
+	if (cpu_has(c, X86_FEATURE_XTOPOLOGY))
+		return;
 
-	while (info && info->family) {
-		if (info->family == c->x86)
-			return info->model_names[c->x86_model];
-		info++;
+	cpuid(1, &eax, &ebx, &ecx, &edx);
+
+	smp_num_siblings = (ebx & 0xff0000) >> 16;
+
+	if (smp_num_siblings == 1) {
+		printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
+	} else if (smp_num_siblings > 1) {
+
+		if (smp_num_siblings > NR_CPUS) {
+			printk(KERN_WARNING "CPU: Unsupported number of siblings %d",
+					smp_num_siblings);
+			smp_num_siblings = 1;
+			return;
+		}
+
+		index_msb = get_count_order(smp_num_siblings);
+#ifdef CONFIG_X86_64
+		c->phys_proc_id = phys_pkg_id(index_msb);
+#else
+		c->phys_proc_id = phys_pkg_id(c->initial_apicid, index_msb);
+#endif
+
+		smp_num_siblings = smp_num_siblings / c->x86_max_cores;
+
+		index_msb = get_count_order(smp_num_siblings);
+
+		core_bits = get_count_order(c->x86_max_cores);
+
+#ifdef CONFIG_X86_64
+		c->cpu_core_id = phys_pkg_id(index_msb) &
+					       ((1 << core_bits) - 1);
+#else
+		c->cpu_core_id = phys_pkg_id(c->initial_apicid, index_msb) &
+					       ((1 << core_bits) - 1);
+#endif
 	}
-	return NULL;		/* Not found */
-}
 
+out:
+	if ((c->x86_max_cores * smp_num_siblings) > 1) {
+		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
+		       c->phys_proc_id);
+		printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
+		       c->cpu_core_id);
+	}
+#endif
+}
 
-static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early)
+static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
 {
 	char *v = c->x86_vendor_id;
 	int i;
 	static int printed;
 
 	for (i = 0; i < X86_VENDOR_NUM; i++) {
-		if (cpu_devs[i]) {
-			if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
-			    (cpu_devs[i]->c_ident[1] &&
-			     !strcmp(v, cpu_devs[i]->c_ident[1]))) {
-				c->x86_vendor = i;
-				if (!early)
-					this_cpu = cpu_devs[i];
-				return;
-			}
+		if (!cpu_devs[i])
+			break;
+
+		if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
+		    (cpu_devs[i]->c_ident[1] &&
+		     !strcmp(v, cpu_devs[i]->c_ident[1]))) {
+			this_cpu = cpu_devs[i];
+			c->x86_vendor = this_cpu->c_x86_vendor;
+			return;
 		}
 	}
+
 	if (!printed) {
 		printed++;
-		printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
+		printk(KERN_ERR "CPU: vendor_id '%s' unknown, using generic init.\n", v);
 		printk(KERN_ERR "CPU: Your system may be unstable.\n");
 	}
+
 	c->x86_vendor = X86_VENDOR_UNKNOWN;
 	this_cpu = &default_cpu;
 }
 
-
-static int __init x86_fxsr_setup(char *s)
-{
-	setup_clear_cpu_cap(X86_FEATURE_FXSR);
-	setup_clear_cpu_cap(X86_FEATURE_XMM);
-	return 1;
-}
-__setup("nofxsr", x86_fxsr_setup);
-
-
-static int __init x86_sep_setup(char *s)
-{
-	setup_clear_cpu_cap(X86_FEATURE_SEP);
-	return 1;
-}
-__setup("nosep", x86_sep_setup);
-
-
-/* Standard macro to see if a specific flag is changeable */
-static inline int flag_is_changeable_p(u32 flag)
-{
-	u32 f1, f2;
-
-	asm("pushfl\n\t"
-	    "pushfl\n\t"
-	    "popl %0\n\t"
-	    "movl %0,%1\n\t"
-	    "xorl %2,%0\n\t"
-	    "pushl %0\n\t"
-	    "popfl\n\t"
-	    "pushfl\n\t"
-	    "popl %0\n\t"
-	    "popfl\n\t"
-	    : "=&r" (f1), "=&r" (f2)
-	    : "ir" (flag));
-
-	return ((f1^f2) & flag) != 0;
-}
-
-
-/* Probe for the CPUID instruction */
-static int __cpuinit have_cpuid_p(void)
-{
-	return flag_is_changeable_p(X86_EFLAGS_ID);
-}
-
-void __init cpu_detect(struct cpuinfo_x86 *c)
+void __cpuinit cpu_detect(struct cpuinfo_x86 *c)
 {
 	/* Get vendor name */
 	cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
@@ -268,50 +423,87 @@ void __init cpu_detect(struct cpuinfo_x86 *c)
 	      (unsigned int *)&c->x86_vendor_id[4]);
 
 	c->x86 = 4;
+	/* Intel-defined flags: level 0x00000001 */
 	if (c->cpuid_level >= 0x00000001) {
 		u32 junk, tfms, cap0, misc;
 		cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
-		c->x86 = (tfms >> 8) & 15;
-		c->x86_model = (tfms >> 4) & 15;
+		c->x86 = (tfms >> 8) & 0xf;
+		c->x86_model = (tfms >> 4) & 0xf;
+		c->x86_mask = tfms & 0xf;
 		if (c->x86 == 0xf)
 			c->x86 += (tfms >> 20) & 0xff;
 		if (c->x86 >= 0x6)
-			c->x86_model += ((tfms >> 16) & 0xF) << 4;
-		c->x86_mask = tfms & 15;
+			c->x86_model += ((tfms >> 16) & 0xf) << 4;
 		if (cap0 & (1<<19)) {
-			c->x86_cache_alignment = ((misc >> 8) & 0xff) * 8;
 			c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
+			c->x86_cache_alignment = c->x86_clflush_size;
 		}
 	}
 }
-static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
+
+static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
 {
 	u32 tfms, xlvl;
-	unsigned int ebx;
+	u32 ebx;
 
-	memset(&c->x86_capability, 0, sizeof c->x86_capability);
-	if (have_cpuid_p()) {
-		/* Intel-defined flags: level 0x00000001 */
-		if (c->cpuid_level >= 0x00000001) {
-			u32 capability, excap;
-			cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
-			c->x86_capability[0] = capability;
-			c->x86_capability[4] = excap;
-		}
+	/* Intel-defined flags: level 0x00000001 */
+	if (c->cpuid_level >= 0x00000001) {
+		u32 capability, excap;
+		cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
+		c->x86_capability[0] = capability;
+		c->x86_capability[4] = excap;
+	}
 
-		/* AMD-defined flags: level 0x80000001 */
-		xlvl = cpuid_eax(0x80000000);
-		if ((xlvl & 0xffff0000) == 0x80000000) {
-			if (xlvl >= 0x80000001) {
-				c->x86_capability[1] = cpuid_edx(0x80000001);
-				c->x86_capability[6] = cpuid_ecx(0x80000001);
-			}
+	/* AMD-defined flags: level 0x80000001 */
+	xlvl = cpuid_eax(0x80000000);
+	c->extended_cpuid_level = xlvl;
+	if ((xlvl & 0xffff0000) == 0x80000000) {
+		if (xlvl >= 0x80000001) {
+			c->x86_capability[1] = cpuid_edx(0x80000001);
+			c->x86_capability[6] = cpuid_ecx(0x80000001);
 		}
+	}
 
+#ifdef CONFIG_X86_64
+	if (c->extended_cpuid_level >= 0x80000008) {
+		u32 eax = cpuid_eax(0x80000008);
+
+		c->x86_virt_bits = (eax >> 8) & 0xff;
+		c->x86_phys_bits = eax & 0xff;
 	}
+#endif
+
+	if (c->extended_cpuid_level >= 0x80000007)
+		c->x86_power = cpuid_edx(0x80000007);
 
 }
 
+static void __cpuinit identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
+{
+#ifdef CONFIG_X86_32
+	int i;
+
+	/*
+	 * First of all, decide if this is a 486 or higher
+	 * It's a 486 if we can modify the AC flag
+	 */
+	if (flag_is_changeable_p(X86_EFLAGS_AC))
+		c->x86 = 4;
+	else
+		c->x86 = 3;
+
+	for (i = 0; i < X86_VENDOR_NUM; i++)
+		if (cpu_devs[i] && cpu_devs[i]->c_identify) {
+			c->x86_vendor_id[0] = 0;
+			cpu_devs[i]->c_identify(c);
+			if (c->x86_vendor_id[0]) {
+				get_cpu_vendor(c);
+				break;
+			}
+		}
+#endif
+}
+
 /*
  * Do minimum CPU detection early.
  * Fields really needed: vendor, cpuid_level, family, model, mask,
@@ -321,25 +513,61 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
  * WARNING: this function is only called on the BP.  Don't add code here
  * that is supposed to run on all CPUs.
  */
-static void __init early_cpu_detect(void)
+static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 {
-	struct cpuinfo_x86 *c = &boot_cpu_data;
-
-	c->x86_cache_alignment = 32;
+#ifdef CONFIG_X86_64
+	c->x86_clflush_size = 64;
+#else
 	c->x86_clflush_size = 32;
+#endif
+	c->x86_cache_alignment = c->x86_clflush_size;
+
+	memset(&c->x86_capability, 0, sizeof c->x86_capability);
+	c->extended_cpuid_level = 0;
 
 	if (!have_cpuid_p())
+		identify_cpu_without_cpuid(c);
+
+	/* cyrix could have cpuid enabled via c_identify()*/
+	if (!have_cpuid_p())
 		return;
 
 	cpu_detect(c);
 
-	get_cpu_vendor(c, 1);
+	get_cpu_vendor(c);
 
-	early_get_cap(c);
+	get_cpu_cap(c);
 
-	if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
-	    cpu_devs[c->x86_vendor]->c_early_init)
-		cpu_devs[c->x86_vendor]->c_early_init(c);
+	if (this_cpu->c_early_init)
+		this_cpu->c_early_init(c);
+
+	validate_pat_support(c);
+}
+
+void __init early_cpu_init(void)
+{
+	struct cpu_dev **cdev;
+	int count = 0;
+
+	printk("KERNEL supported cpus:\n");
+	for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {
+		struct cpu_dev *cpudev = *cdev;
+		unsigned int j;
+
+		if (count >= X86_VENDOR_NUM)
+			break;
+		cpu_devs[count] = cpudev;
+		count++;
+
+		for (j = 0; j < 2; j++) {
+			if (!cpudev->c_ident[j])
+				continue;
+			printk("  %s %s\n", cpudev->c_vendor,
+				cpudev->c_ident[j]);
+		}
+	}
+
+	early_identify_cpu(&boot_cpu_data);
 }
 
 /*
@@ -357,86 +585,41 @@ static void __cpuinit detect_nopl(struct cpuinfo_x86 *c)
 
 static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
 {
-	u32 tfms, xlvl;
-	unsigned int ebx;
-
-	if (have_cpuid_p()) {
-		/* Get vendor name */
-		cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
-		      (unsigned int *)&c->x86_vendor_id[0],
-		      (unsigned int *)&c->x86_vendor_id[8],
-		      (unsigned int *)&c->x86_vendor_id[4]);
-
-		get_cpu_vendor(c, 0);
-		/* Initialize the standard set of capabilities */
-		/* Note that the vendor-specific code below might override */
-		/* Intel-defined flags: level 0x00000001 */
-		if (c->cpuid_level >= 0x00000001) {
-			u32 capability, excap;
-			cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
-			c->x86_capability[0] = capability;
-			c->x86_capability[4] = excap;
-			c->x86 = (tfms >> 8) & 15;
-			c->x86_model = (tfms >> 4) & 15;
-			if (c->x86 == 0xf)
-				c->x86 += (tfms >> 20) & 0xff;
-			if (c->x86 >= 0x6)
-				c->x86_model += ((tfms >> 16) & 0xF) << 4;
-			c->x86_mask = tfms & 15;
-			c->initial_apicid = (ebx >> 24) & 0xFF;
-#ifdef CONFIG_X86_HT
-			c->apicid = phys_pkg_id(c->initial_apicid, 0);
-			c->phys_proc_id = c->initial_apicid;
-#else
-			c->apicid = c->initial_apicid;
-#endif
-			if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
-				c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
-		} else {
-			/* Have CPUID level 0 only - unheard of */
-			c->x86 = 4;
-		}
+	c->extended_cpuid_level = 0;
 
-		/* AMD-defined flags: level 0x80000001 */
-		xlvl = cpuid_eax(0x80000000);
-		if ((xlvl & 0xffff0000) == 0x80000000) {
-			if (xlvl >= 0x80000001) {
-				c->x86_capability[1] = cpuid_edx(0x80000001);
-				c->x86_capability[6] = cpuid_ecx(0x80000001);
-			}
-			if (xlvl >= 0x80000004)
-				get_model_name(c); /* Default name */
-		}
+	if (!have_cpuid_p())
+		identify_cpu_without_cpuid(c);
 
-		init_scattered_cpuid_features(c);
-		detect_nopl(c);
-	}
-}
+	/* cyrix could have cpuid enabled via c_identify()*/
+	if (!have_cpuid_p())
+		return;
 
-static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
-{
-	if (cpu_has(c, X86_FEATURE_PN) && disable_x86_serial_nr) {
-		/* Disable processor serial number */
-		unsigned long lo, hi;
-		rdmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
-		lo |= 0x200000;
-		wrmsr(MSR_IA32_BBL_CR_CTL, lo, hi);
-		printk(KERN_NOTICE "CPU serial number disabled.\n");
-		clear_cpu_cap(c, X86_FEATURE_PN);
+	cpu_detect(c);
 
-		/* Disabling the serial number may affect the cpuid level */
-		c->cpuid_level = cpuid_eax(0);
-	}
-}
+	get_cpu_vendor(c);
 
-static int __init x86_serial_nr_setup(char *s)
-{
-	disable_x86_serial_nr = 0;
-	return 1;
-}
-__setup("serialnumber", x86_serial_nr_setup);
+	get_cpu_cap(c);
 
+	if (c->cpuid_level >= 0x00000001) {
+		c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xFF;
+#ifdef CONFIG_X86_32
+# ifdef CONFIG_X86_HT
+		c->apicid = phys_pkg_id(c->initial_apicid, 0);
+# else
+		c->apicid = c->initial_apicid;
+# endif
+#endif
 
+#ifdef CONFIG_X86_HT
+		c->phys_proc_id = c->initial_apicid;
+#endif
+	}
+
+	get_model_name(c); /* Default name */
+
+	init_scattered_cpuid_features(c);
+	detect_nopl(c);
+}
 
 /*
  * This does the hard work of actually picking apart the CPU stuff...
@@ -448,30 +631,29 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 	c->loops_per_jiffy = loops_per_jiffy;
 	c->x86_cache_size = -1;
 	c->x86_vendor = X86_VENDOR_UNKNOWN;
-	c->cpuid_level = -1;	/* CPUID not detected */
 	c->x86_model = c->x86_mask = 0;	/* So far unknown... */
 	c->x86_vendor_id[0] = '\0'; /* Unset */
 	c->x86_model_id[0] = '\0';  /* Unset */
 	c->x86_max_cores = 1;
+	c->x86_coreid_bits = 0;
+#ifdef CONFIG_X86_64
+	c->x86_clflush_size = 64;
+#else
+	c->cpuid_level = -1;	/* CPUID not detected */
 	c->x86_clflush_size = 32;
+#endif
+	c->x86_cache_alignment = c->x86_clflush_size;
 	memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
-	if (!have_cpuid_p()) {
-		/*
-		 * First of all, decide if this is a 486 or higher
-		 * It's a 486 if we can modify the AC flag
-		 */
-		if (flag_is_changeable_p(X86_EFLAGS_AC))
-			c->x86 = 4;
-		else
-			c->x86 = 3;
-	}
-
 	generic_identify(c);
 
 	if (this_cpu->c_identify)
 		this_cpu->c_identify(c);
 
+#ifdef CONFIG_X86_64
+	c->apicid = phys_pkg_id(0);
+#endif
+
 	/*
 	 * Vendor-specific initialization.  In this section we
 	 * canonicalize the feature flags, meaning if there are
@@ -505,6 +687,10 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 				c->x86, c->x86_model);
 	}
 
+#ifdef CONFIG_X86_64
+	detect_ht(c);
+#endif
+
 	/*
 	 * On SMP, boot_cpu_data holds the common feature set between
 	 * all CPUs; so make sure that we indicate which features are
@@ -513,7 +699,7 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 	 */
 	if (c != &boot_cpu_data) {
 		/* AND the already accumulated flags with these */
-		for (i = 0 ; i < NCAPINTS ; i++)
+		for (i = 0; i < NCAPINTS; i++)
 			boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
 	}
 
@@ -521,72 +707,79 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 	for (i = 0; i < NCAPINTS; i++)
 		c->x86_capability[i] &= ~cleared_cpu_caps[i];
 
+#ifdef CONFIG_X86_MCE
 	/* Init Machine Check Exception if available. */
 	mcheck_init(c);
+#endif
 
 	select_idle_routine(c);
+
+#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
+	numa_add_cpu(smp_processor_id());
+#endif
 }
 
 void __init identify_boot_cpu(void)
 {
 	identify_cpu(&boot_cpu_data);
+#ifdef CONFIG_X86_32
 	sysenter_setup();
 	enable_sep_cpu();
+#endif
 }
 
 void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
 {
 	BUG_ON(c == &boot_cpu_data);
 	identify_cpu(c);
+#ifdef CONFIG_X86_32
 	enable_sep_cpu();
+#endif
 	mtrr_ap_init();
 }
 
-#ifdef CONFIG_X86_HT
-void __cpuinit detect_ht(struct cpuinfo_x86 *c)
-{
-	u32 	eax, ebx, ecx, edx;
-	int 	index_msb, core_bits;
-
-	cpuid(1, &eax, &ebx, &ecx, &edx);
-
-	if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
-		return;
-
-	smp_num_siblings = (ebx & 0xff0000) >> 16;
+struct msr_range {
+	unsigned min;
+	unsigned max;
+};
 
-	if (smp_num_siblings == 1) {
-		printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
-	} else if (smp_num_siblings > 1) {
+static struct msr_range msr_range_array[] __cpuinitdata = {
+	{ 0x00000000, 0x00000418},
+	{ 0xc0000000, 0xc000040b},
+	{ 0xc0010000, 0xc0010142},
+	{ 0xc0011000, 0xc001103b},
+};
 
-		if (smp_num_siblings > NR_CPUS) {
-			printk(KERN_WARNING "CPU: Unsupported number of the "
-					"siblings %d", smp_num_siblings);
-			smp_num_siblings = 1;
-			return;
+static void __cpuinit print_cpu_msr(void)
+{
+	unsigned index;
+	u64 val;
+	int i;
+	unsigned index_min, index_max;
+
+	for (i = 0; i < ARRAY_SIZE(msr_range_array); i++) {
+		index_min = msr_range_array[i].min;
+		index_max = msr_range_array[i].max;
+		for (index = index_min; index < index_max; index++) {
+			if (rdmsrl_amd_safe(index, &val))
+				continue;
+			printk(KERN_INFO " MSR%08x: %016llx\n", index, val);
 		}
+	}
+}
 
-		index_msb = get_count_order(smp_num_siblings);
-		c->phys_proc_id = phys_pkg_id(c->initial_apicid, index_msb);
-
-		printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
-		       c->phys_proc_id);
-
-		smp_num_siblings = smp_num_siblings / c->x86_max_cores;
-
-		index_msb = get_count_order(smp_num_siblings) ;
+static int show_msr __cpuinitdata;
+static __init int setup_show_msr(char *arg)
+{
+	int num;
 
-		core_bits = get_count_order(c->x86_max_cores);
+	get_option(&arg, &num);
 
-		c->cpu_core_id = phys_pkg_id(c->initial_apicid, index_msb) &
-					       ((1 << core_bits) - 1);
-
-		if (c->x86_max_cores > 1)
-			printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
-			       c->cpu_core_id);
-	}
+	if (num > 0)
+		show_msr = num;
+	return 1;
 }
-#endif
+__setup("show_msr=", setup_show_msr);
 
 static __init int setup_noclflush(char *arg)
 {
@@ -605,17 +798,25 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
 		vendor = c->x86_vendor_id;
 
 	if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor)))
-		printk("%s ", vendor);
+		printk(KERN_CONT "%s ", vendor);
 
-	if (!c->x86_model_id[0])
-		printk("%d86", c->x86);
+	if (c->x86_model_id[0])
+		printk(KERN_CONT "%s", c->x86_model_id);
 	else
-		printk("%s", c->x86_model_id);
+		printk(KERN_CONT "%d86", c->x86);
 
 	if (c->x86_mask || c->cpuid_level >= 0)
-		printk(" stepping %02x\n", c->x86_mask);
+		printk(KERN_CONT " stepping %02x\n", c->x86_mask);
 	else
-		printk("\n");
+		printk(KERN_CONT "\n");
+
+#ifdef CONFIG_SMP
+	if (c->cpu_index < show_msr)
+		print_cpu_msr();
+#else
+	if (show_msr)
+		print_cpu_msr();
+#endif
 }
 
 static __init int setup_disablecpuid(char *arg)
@@ -631,19 +832,89 @@ __setup("clearcpuid=", setup_disablecpuid);
 
 cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE;
 
-void __init early_cpu_init(void)
+#ifdef CONFIG_X86_64
+struct x8664_pda **_cpu_pda __read_mostly;
+EXPORT_SYMBOL(_cpu_pda);
+
+struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
+
+char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
+
+void __cpuinit pda_init(int cpu)
+{
+	struct x8664_pda *pda = cpu_pda(cpu);
+
+	/* Setup up data that may be needed in __get_free_pages early */
+	loadsegment(fs, 0);
+	loadsegment(gs, 0);
+	/* Memory clobbers used to order PDA accessed */
+	mb();
+	wrmsrl(MSR_GS_BASE, pda);
+	mb();
+
+	pda->cpunumber = cpu;
+	pda->irqcount = -1;
+	pda->kernelstack = (unsigned long)stack_thread_info() -
+				 PDA_STACKOFFSET + THREAD_SIZE;
+	pda->active_mm = &init_mm;
+	pda->mmu_state = 0;
+
+	if (cpu == 0) {
+		/* others are initialized in smpboot.c */
+		pda->pcurrent = &init_task;
+		pda->irqstackptr = boot_cpu_stack;
+		pda->irqstackptr += IRQSTACKSIZE - 64;
+	} else {
+		if (!pda->irqstackptr) {
+			pda->irqstackptr = (char *)
+				__get_free_pages(GFP_ATOMIC, IRQSTACK_ORDER);
+			if (!pda->irqstackptr)
+				panic("cannot allocate irqstack for cpu %d",
+				      cpu);
+			pda->irqstackptr += IRQSTACKSIZE - 64;
+		}
+
+		if (pda->nodenumber == 0 && cpu_to_node(cpu) != NUMA_NO_NODE)
+			pda->nodenumber = cpu_to_node(cpu);
+	}
+}
+
+char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ +
+			   DEBUG_STKSZ] __page_aligned_bss;
+
+extern asmlinkage void ignore_sysret(void);
+
+/* May not be marked __init: used by software suspend */
+void syscall_init(void)
 {
-	struct cpu_vendor_dev *cvdev;
+	/*
+	 * LSTAR and STAR live in a bit strange symbiosis.
+	 * They both write to the same internal register. STAR allows to
+	 * set CS/DS but only a 32bit target. LSTAR sets the 64bit rip.
+	 */
+	wrmsrl(MSR_STAR,  ((u64)__USER32_CS)<<48  | ((u64)__KERNEL_CS)<<32);
+	wrmsrl(MSR_LSTAR, system_call);
+	wrmsrl(MSR_CSTAR, ignore_sysret);
 
-	for (cvdev = __x86cpuvendor_start ;
-	     cvdev < __x86cpuvendor_end   ;
-	     cvdev++)
-		cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
+#ifdef CONFIG_IA32_EMULATION
+	syscall32_cpu_init();
+#endif
 
-	early_cpu_detect();
-	validate_pat_support(&boot_cpu_data);
+	/* Flags to clear on syscall */
+	wrmsrl(MSR_SYSCALL_MASK,
+	       X86_EFLAGS_TF|X86_EFLAGS_DF|X86_EFLAGS_IF|X86_EFLAGS_IOPL);
 }
 
+unsigned long kernel_eflags;
+
+/*
+ * Copies of the original ist values from the tss are only accessed during
+ * debugging, no special alignment required.
+ */
+DEFINE_PER_CPU(struct orig_ist, orig_ist);
+
+#else
+
 /* Make sure %fs is initialized properly in idle threads */
 struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
 {
@@ -651,25 +922,136 @@ struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
 	regs->fs = __KERNEL_PERCPU;
 	return regs;
 }
-
-/* Current gdt points %fs at the "master" per-cpu area: after this,
- * it's on the real one. */
-void switch_to_new_gdt(void)
-{
-	struct desc_ptr gdt_descr;
-
-	gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
-	gdt_descr.size = GDT_SIZE - 1;
-	load_gdt(&gdt_descr);
-	asm("mov %0, %%fs" : : "r" (__KERNEL_PERCPU) : "memory");
-}
+#endif
 
 /*
  * cpu_init() initializes state that is per-CPU. Some data is already
  * initialized (naturally) in the bootstrap process, such as the GDT
  * and IDT. We reload them nevertheless, this function acts as a
  * 'CPU state barrier', nothing should get across.
+ * A lot of state is already set up in PDA init for 64 bit
  */
+#ifdef CONFIG_X86_64
+void __cpuinit cpu_init(void)
+{
+	int cpu = stack_smp_processor_id();
+	struct tss_struct *t = &per_cpu(init_tss, cpu);
+	struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu);
+	unsigned long v;
+	char *estacks = NULL;
+	struct task_struct *me;
+	int i;
+
+	/* CPU 0 is initialised in head64.c */
+	if (cpu != 0)
+		pda_init(cpu);
+	else
+		estacks = boot_exception_stacks;
+
+	me = current;
+
+	if (cpu_test_and_set(cpu, cpu_initialized))
+		panic("CPU#%d already initialized!\n", cpu);
+
+	printk(KERN_INFO "Initializing CPU#%d\n", cpu);
+
+	clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE);
+
+	/*
+	 * Initialize the per-CPU GDT with the boot GDT,
+	 * and set up the GDT descriptor:
+	 */
+
+	switch_to_new_gdt();
+	load_idt((const struct desc_ptr *)&idt_descr);
+
+	memset(me->thread.tls_array, 0, GDT_ENTRY_TLS_ENTRIES * 8);
+	syscall_init();
+
+	wrmsrl(MSR_FS_BASE, 0);
+	wrmsrl(MSR_KERNEL_GS_BASE, 0);
+	barrier();
+
+	check_efer();
+	if (cpu != 0 && x2apic)
+		enable_x2apic();
+
+	/*
+	 * set up and load the per-CPU TSS
+	 */
+	if (!orig_ist->ist[0]) {
+		static const unsigned int order[N_EXCEPTION_STACKS] = {
+		  [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER,
+		  [DEBUG_STACK - 1] = DEBUG_STACK_ORDER
+		};
+		for (v = 0; v < N_EXCEPTION_STACKS; v++) {
+			if (cpu) {
+				estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]);
+				if (!estacks)
+					panic("Cannot allocate exception "
+					      "stack %ld %d\n", v, cpu);
+			}
+			estacks += PAGE_SIZE << order[v];
+			orig_ist->ist[v] = t->x86_tss.ist[v] =
+					(unsigned long)estacks;
+		}
+	}
+
+	t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+	/*
+	 * <= is required because the CPU will access up to
+	 * 8 bits beyond the end of the IO permission bitmap.
+	 */
+	for (i = 0; i <= IO_BITMAP_LONGS; i++)
+		t->io_bitmap[i] = ~0UL;
+
+	atomic_inc(&init_mm.mm_count);
+	me->active_mm = &init_mm;
+	if (me->mm)
+		BUG();
+	enter_lazy_tlb(&init_mm, me);
+
+	load_sp0(t, &current->thread);
+	set_tss_desc(cpu, t);
+	load_TR_desc();
+	load_LDT(&init_mm.context);
+
+#ifdef CONFIG_KGDB
+	/*
+	 * If the kgdb is connected no debug regs should be altered.  This
+	 * is only applicable when KGDB and a KGDB I/O module are built
+	 * into the kernel and you are using early debugging with
+	 * kgdbwait. KGDB will control the kernel HW breakpoint registers.
+	 */
+	if (kgdb_connected && arch_kgdb_ops.correct_hw_break)
+		arch_kgdb_ops.correct_hw_break();
+	else {
+#endif
+	/*
+	 * Clear all 6 debug registers:
+	 */
+
+	set_debugreg(0UL, 0);
+	set_debugreg(0UL, 1);
+	set_debugreg(0UL, 2);
+	set_debugreg(0UL, 3);
+	set_debugreg(0UL, 6);
+	set_debugreg(0UL, 7);
+#ifdef CONFIG_KGDB
+	/* If the kgdb is connected no debug regs should be altered. */
+	}
+#endif
+
+	fpu_init();
+
+	raw_local_save_flags(kernel_eflags);
+
+	if (is_uv_system())
+		uv_cpu_init();
+}
+
+#else
+
 void __cpuinit cpu_init(void)
 {
 	int cpu = smp_processor_id();
@@ -723,8 +1105,21 @@ void __cpuinit cpu_init(void)
 	/*
 	 * Force FPU initialization:
 	 */
-	current_thread_info()->status = 0;
+	if (cpu_has_xsave)
+		current_thread_info()->status = TS_XSAVE;
+	else
+		current_thread_info()->status = 0;
 	clear_used_math();
 	mxcsr_feature_mask_init();
+
+	/*
+	 * Boot processor to setup the FP and extended state context info.
+	 */
+	if (!smp_processor_id())
+		init_thread_xstate();
+
+	xsave_init();
 }
 
+
+#endif