9 files changed, 142 insertions, 96 deletions

diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 9ad43be9a01f..74145a33cb0f 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -573,6 +573,7 @@ void __devinit cpu_init(void)
         int cpu = smp_processor_id();
         struct tss_struct * t = &per_cpu(init_tss, cpu);
         struct thread_struct *thread = &current->thread;
+        struct desc_struct *gdt = get_cpu_gdt_table(cpu);
         __u32 stk16_off = (__u32)&per_cpu(cpu_16bit_stack, cpu);
 
         if (cpu_test_and_set(cpu, cpu_initialized)) {
@@ -594,24 +595,16 @@ void __devinit cpu_init(void)
          * Initialize the per-CPU GDT with the boot GDT,
          * and set up the GDT descriptor:
          */
-        memcpy(&per_cpu(cpu_gdt_table, cpu), cpu_gdt_table,
-               GDT_SIZE);
+        memcpy(gdt, cpu_gdt_table, GDT_SIZE);
 
         /* Set up GDT entry for 16bit stack */
-        *(__u64 *)&(per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_ESPFIX_SS]) |=
+        *(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |=
                 ((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) |
                 ((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) |
                 (CPU_16BIT_STACK_SIZE - 1);
 
         cpu_gdt_descr[cpu].size = GDT_SIZE - 1;
-        cpu_gdt_descr[cpu].address =
-            (unsigned long)&per_cpu(cpu_gdt_table, cpu);
-
-        /*
-         * Set up the per-thread TLS descriptor cache:
-         */
-        memcpy(thread->tls_array, &per_cpu(cpu_gdt_table, cpu),
-                GDT_ENTRY_TLS_ENTRIES * 8);
+        cpu_gdt_descr[cpu].address = (unsigned long)gdt;
 
         load_gdt(&cpu_gdt_descr[cpu]);
         load_idt(&idt_descr);
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 822c8ce9d1f1..caa9f7711343 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -32,6 +32,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/compiler.h>
+#include <linux/sched.h>        /* current */
 #include <asm/io.h>
 #include <asm/delay.h>
 #include <asm/uaccess.h>
diff --git a/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c b/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
index aa622d52c6e5..270f2188d68b 100644
--- a/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
@@ -28,6 +28,7 @@
 #include <linux/cpufreq.h>
 #include <linux/slab.h>
 #include <linux/cpumask.h>
+#include <linux/sched.h>        /* current / set_cpus_allowed() */
 
 #include <asm/processor.h> 
 #include <asm/msr.h>
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
index 58ca98fdc2ca..2d5c9adba0cd 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
@@ -32,6 +32,7 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/cpumask.h>
+#include <linux/sched.h>        /* for current / set_cpus_allowed() */
 
 #include <asm/msr.h>
 #include <asm/io.h>
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
index c397b6220430..1465974256c9 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -22,6 +22,7 @@
 #include <linux/init.h>
 #include <linux/cpufreq.h>
 #include <linux/config.h>
+#include <linux/sched.h>        /* current */
 #include <linux/delay.h>
 #include <linux/compiler.h>
 
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c
index 9e0d5f83cb9f..4dc42a189ae5 100644
--- a/arch/i386/kernel/cpu/intel_cacheinfo.c
+++ b/arch/i386/kernel/cpu/intel_cacheinfo.c
@@ -3,6 +3,7 @@
  *
  *      Changes:
  *      Venkatesh Pallipadi     : Adding cache identification through cpuid(4)
+ *              Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure.
  */
 
 #include <linux/init.h>
@@ -10,6 +11,7 @@
 #include <linux/device.h>
 #include <linux/compiler.h>
 #include <linux/cpu.h>
+#include <linux/sched.h>
 
 #include <asm/processor.h>
 #include <asm/smp.h>
@@ -28,7 +30,7 @@ struct _cache_table
 };
 
 /* all the cache descriptor types we care about (no TLB or trace cache entries) */
-static struct _cache_table cache_table[] __devinitdata =
+static struct _cache_table cache_table[] __cpuinitdata =
 {
         { 0x06, LVL_1_INST, 8 },        /* 4-way set assoc, 32 byte line size */
         { 0x08, LVL_1_INST, 16 },       /* 4-way set assoc, 32 byte line size */
@@ -117,10 +119,9 @@ struct _cpuid4_info {
         cpumask_t shared_cpu_map;
 };
 
-#define MAX_CACHE_LEAVES                4
 static unsigned short                   num_cache_leaves;
 
-static int __devinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf)
+static int __cpuinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf)
 {
         unsigned int            eax, ebx, ecx, edx;
         union _cpuid4_leaf_eax  cache_eax;
@@ -144,23 +145,18 @@ static int __init find_num_cache_leaves(void)
 {
         unsigned int            eax, ebx, ecx, edx;
         union _cpuid4_leaf_eax  cache_eax;
-        int                     i;
-        int                     retval;
+        int                     i = -1;
 
-        retval = MAX_CACHE_LEAVES;
-        /* Do cpuid(4) loop to find out num_cache_leaves */
-        for (i = 0; i < MAX_CACHE_LEAVES; i++) {
+        do {
+                ++i;
+                /* Do cpuid(4) loop to find out num_cache_leaves */
                 cpuid_count(4, i, &eax, &ebx, &ecx, &edx);
                 cache_eax.full = eax;
-                if (cache_eax.split.type == CACHE_TYPE_NULL) {
-                        retval = i;
-                        break;
-                }
-        }
-        return retval;
+        } while (cache_eax.split.type != CACHE_TYPE_NULL);
+        return i;
 }
 
-unsigned int __devinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
+unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
 {
         unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; /* Cache sizes */
         unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */
@@ -284,13 +280,7 @@ unsigned int __devinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
                 if ( l3 )
                         printk(KERN_INFO "CPU: L3 cache: %dK\n", l3);
 
-                /*
-                 * This assumes the L3 cache is shared; it typically lives in
-                 * the northbridge.  The L1 caches are included by the L2
-                 * cache, and so should not be included for the purpose of
-                 * SMP switching weights.
-                 */
-                c->x86_cache_size = l2 ? l2 : (l1i+l1d);
+                c->x86_cache_size = l3 ? l3 : (l2 ? l2 : (l1i+l1d));
         }
 
         return l2;
@@ -301,7 +291,7 @@ static struct _cpuid4_info *cpuid4_info[NR_CPUS];
 #define CPUID4_INFO_IDX(x,y)    (&((cpuid4_info[x])[y]))
 
 #ifdef CONFIG_SMP
-static void __devinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
+static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
 {
         struct _cpuid4_info     *this_leaf;
         unsigned long num_threads_sharing;
@@ -334,7 +324,7 @@ static void free_cache_attributes(unsigned int cpu)
         cpuid4_info[cpu] = NULL;
 }
 
-static int __devinit detect_cache_attributes(unsigned int cpu)
+static int __cpuinit detect_cache_attributes(unsigned int cpu)
 {
         struct _cpuid4_info     *this_leaf;
         unsigned long           j;
@@ -511,7 +501,7 @@ static void cpuid4_cache_sysfs_exit(unsigned int cpu)
         free_cache_attributes(cpu);
 }
 
-static int __devinit cpuid4_cache_sysfs_init(unsigned int cpu)
+static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu)
 {
 
         if (num_cache_leaves == 0)
@@ -542,7 +532,7 @@ err_out:
 }
 
 /* Add/Remove cache interface for CPU device */
-static int __devinit cache_add_dev(struct sys_device * sys_dev)
+static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
 {
         unsigned int cpu = sys_dev->id;
         unsigned long i, j;
@@ -579,7 +569,7 @@ static int __devinit cache_add_dev(struct sys_device * sys_dev)
         return retval;
 }
 
-static int __devexit cache_remove_dev(struct sys_device * sys_dev)
+static void __cpuexit cache_remove_dev(struct sys_device * sys_dev)
 {
         unsigned int cpu = sys_dev->id;
         unsigned long i;
@@ -588,24 +578,49 @@ static int __devexit cache_remove_dev(struct sys_device * sys_dev)
                 kobject_unregister(&(INDEX_KOBJECT_PTR(cpu,i)->kobj));
         kobject_unregister(cache_kobject[cpu]);
         cpuid4_cache_sysfs_exit(cpu);
-        return 0;
+        return;
+}
+
+static int __cpuinit cacheinfo_cpu_callback(struct notifier_block *nfb,
+                                        unsigned long action, void *hcpu)
+{
+        unsigned int cpu = (unsigned long)hcpu;
+        struct sys_device *sys_dev;
+
+        sys_dev = get_cpu_sysdev(cpu);
+        switch (action) {
+        case CPU_ONLINE:
+                cache_add_dev(sys_dev);
+                break;
+        case CPU_DEAD:
+                cache_remove_dev(sys_dev);
+                break;
+        }
+        return NOTIFY_OK;
 }
 
-static struct sysdev_driver cache_sysdev_driver = {
-        .add = cache_add_dev,
-        .remove = __devexit_p(cache_remove_dev),
+static struct notifier_block cacheinfo_cpu_notifier =
+{
+    .notifier_call = cacheinfo_cpu_callback,
 };
 
-/* Register/Unregister the cpu_cache driver */
-static int __devinit cache_register_driver(void)
+static int __cpuinit cache_sysfs_init(void)
 {
+        int i;
+
         if (num_cache_leaves == 0)
                 return 0;
 
-        return sysdev_driver_register(&cpu_sysdev_class,&cache_sysdev_driver);
+        register_cpu_notifier(&cacheinfo_cpu_notifier);
+
+        for_each_online_cpu(i) {
+                cacheinfo_cpu_callback(&cacheinfo_cpu_notifier, CPU_ONLINE,
+                        (void *)(long)i);
+        }
+
+        return 0;
 }
 
-device_initcall(cache_register_driver);
+device_initcall(cache_sysfs_init);
 
 #endif
-
diff --git a/arch/i386/kernel/cpu/mcheck/p6.c b/arch/i386/kernel/cpu/mcheck/p6.c
index 3c035b8fa3d9..979b18bc95c1 100644
--- a/arch/i386/kernel/cpu/mcheck/p6.c
+++ b/arch/i386/kernel/cpu/mcheck/p6.c
@@ -102,11 +102,16 @@ void __devinit intel_p6_mcheck_init(struct cpuinfo_x86 *c)
                 wrmsr(MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff);
         nr_mce_banks = l & 0xff;
 
-        /* Don't enable bank 0 on intel P6 cores, it goes bang quickly. */
-        for (i=1; i<nr_mce_banks; i++) {
+        /*
+         * Following the example in IA-32 SDM Vol 3:
+         * - MC0_CTL should not be written
+         * - Status registers on all banks should be cleared on reset
+         */
+        for (i=1; i<nr_mce_banks; i++)
                 wrmsr (MSR_IA32_MC0_CTL+4*i, 0xffffffff, 0xffffffff);
+
+        for (i=0; i<nr_mce_banks; i++)
                 wrmsr (MSR_IA32_MC0_STATUS+4*i, 0x0, 0x0);
-        }
 
         set_in_cr4 (X86_CR4_MCE);
         printk (KERN_INFO "Intel machine check reporting enabled on CPU#%d.\n",
diff --git a/arch/i386/kernel/cpu/mtrr/if.c b/arch/i386/kernel/cpu/mtrr/if.c
index 1923e0aed26a..cf39e205d33c 100644
--- a/arch/i386/kernel/cpu/mtrr/if.c
+++ b/arch/i386/kernel/cpu/mtrr/if.c
@@ -149,60 +149,89 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)
         return -EINVAL;
 }
 
-static int
-mtrr_ioctl(struct inode *inode, struct file *file,
-           unsigned int cmd, unsigned long __arg)
+static long
+mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg)
 {
-        int err;
+        int err = 0;
         mtrr_type type;
         struct mtrr_sentry sentry;
         struct mtrr_gentry gentry;
         void __user *arg = (void __user *) __arg;
 
         switch (cmd) {
+        case MTRRIOC_ADD_ENTRY:
+        case MTRRIOC_SET_ENTRY:
+        case MTRRIOC_DEL_ENTRY:
+        case MTRRIOC_KILL_ENTRY:
+        case MTRRIOC_ADD_PAGE_ENTRY:
+        case MTRRIOC_SET_PAGE_ENTRY:
+        case MTRRIOC_DEL_PAGE_ENTRY:
+        case MTRRIOC_KILL_PAGE_ENTRY:
+                if (copy_from_user(&sentry, arg, sizeof sentry))
+                        return -EFAULT;
+                break;
+        case MTRRIOC_GET_ENTRY:
+        case MTRRIOC_GET_PAGE_ENTRY:
+                if (copy_from_user(&gentry, arg, sizeof gentry))
+                        return -EFAULT;
+                break;
+#ifdef CONFIG_COMPAT
+        case MTRRIOC32_ADD_ENTRY:
+        case MTRRIOC32_SET_ENTRY:
+        case MTRRIOC32_DEL_ENTRY:
+        case MTRRIOC32_KILL_ENTRY:
+        case MTRRIOC32_ADD_PAGE_ENTRY:
+        case MTRRIOC32_SET_PAGE_ENTRY:
+        case MTRRIOC32_DEL_PAGE_ENTRY:
+        case MTRRIOC32_KILL_PAGE_ENTRY: {
+                struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)__arg;
+                err = get_user(sentry.base, &s32->base);
+                err |= get_user(sentry.size, &s32->size);
+                err |= get_user(sentry.type, &s32->type);
+                if (err)
+                        return err;
+                break;
+        }
+        case MTRRIOC32_GET_ENTRY:
+        case MTRRIOC32_GET_PAGE_ENTRY: {
+                struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg;
+                err = get_user(gentry.regnum, &g32->regnum);
+                err |= get_user(gentry.base, &g32->base);
+                err |= get_user(gentry.size, &g32->size);
+                err |= get_user(gentry.type, &g32->type);
+                if (err)
+                        return err;
+                break;
+        }
+#endif
+        }
+
+        switch (cmd) {
         default:
                 return -ENOTTY;
         case MTRRIOC_ADD_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err =
                     mtrr_file_add(sentry.base, sentry.size, sentry.type, 1,
                                   file, 0);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_SET_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err = mtrr_add(sentry.base, sentry.size, sentry.type, 0);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_DEL_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err = mtrr_file_del(sentry.base, sentry.size, file, 0);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_KILL_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err = mtrr_del(-1, sentry.base, sentry.size);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_GET_ENTRY:
-                if (copy_from_user(&gentry, arg, sizeof gentry))
-                        return -EFAULT;
                 if (gentry.regnum >= num_var_ranges)
                         return -EINVAL;
                 mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
@@ -217,60 +246,59 @@ mtrr_ioctl(struct inode *inode, struct file *file,
                         gentry.type = type;
                 }
 
-                if (copy_to_user(arg, &gentry, sizeof gentry))
-                        return -EFAULT;
                 break;
         case MTRRIOC_ADD_PAGE_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err =
                     mtrr_file_add(sentry.base, sentry.size, sentry.type, 1,
                                   file, 1);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_SET_PAGE_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err = mtrr_add_page(sentry.base, sentry.size, sentry.type, 0);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_DEL_PAGE_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err = mtrr_file_del(sentry.base, sentry.size, file, 1);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_KILL_PAGE_ENTRY:
                 if (!capable(CAP_SYS_ADMIN))
                         return -EPERM;
-                if (copy_from_user(&sentry, arg, sizeof sentry))
-                        return -EFAULT;
                 err = mtrr_del_page(-1, sentry.base, sentry.size);
-                if (err < 0)
-                        return err;
                 break;
         case MTRRIOC_GET_PAGE_ENTRY:
-                if (copy_from_user(&gentry, arg, sizeof gentry))
-                        return -EFAULT;
                 if (gentry.regnum >= num_var_ranges)
                         return -EINVAL;
                 mtrr_if->get(gentry.regnum, &gentry.base, &gentry.size, &type);
                 gentry.type = type;
+                break;
+        }
+
+        if (err)
+                return err;
 
+        switch(cmd) {
+        case MTRRIOC_GET_ENTRY:
+        case MTRRIOC_GET_PAGE_ENTRY:
                 if (copy_to_user(arg, &gentry, sizeof gentry))
-                        return -EFAULT;
+                        err = -EFAULT;
+                break;
+#ifdef CONFIG_COMPAT
+        case MTRRIOC32_GET_ENTRY:
+        case MTRRIOC32_GET_PAGE_ENTRY: {
+                struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg;
+                err = put_user(gentry.base, &g32->base);
+                err |= put_user(gentry.size, &g32->size);
+                err |= put_user(gentry.regnum, &g32->regnum);
+                err |= put_user(gentry.type, &g32->type);
                 break;
         }
-        return 0;
+#endif
+        }
+        return err;
 }
 
 static int
@@ -310,7 +338,8 @@ static struct file_operations mtrr_fops = {
         .read    = seq_read,
         .llseek  = seq_lseek,
         .write   = mtrr_write,
-        .ioctl   = mtrr_ioctl,
+        .unlocked_ioctl = mtrr_ioctl,
+        .compat_ioctl = mtrr_ioctl,
         .release = mtrr_close,
 };
 
diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index 8bd77d948a84..41b871ecf4b3 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -44,7 +44,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 
                 /* Intel-defined (#2) */
-                "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "est",
+                "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", NULL, "est",
                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,