27 files changed, 203 insertions, 72 deletions

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index c63822816249..1f84794f0759 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -738,5 +738,5 @@ void __kprobes text_poke_smp_batch(struct text_poke_param *params, int n)
 
         atomic_set(&stop_machine_first, 1);
         wrote_text = 0;
-        __stop_machine(stop_machine_text_poke, (void *)&tpp, NULL);
+        __stop_machine(stop_machine_text_poke, (void *)&tpp, cpu_online_mask);
 }
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index a2fd72e0ab35..f98d84caf94c 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -186,7 +186,7 @@ static struct resource lapic_resource = {
         .flags = IORESOURCE_MEM | IORESOURCE_BUSY,
 };
 
-static unsigned int calibration_result;
+unsigned int lapic_timer_frequency = 0;
 
 static void apic_pm_activate(void);
 
@@ -454,7 +454,7 @@ static void lapic_timer_setup(enum clock_event_mode mode,
         switch (mode) {
         case CLOCK_EVT_MODE_PERIODIC:
         case CLOCK_EVT_MODE_ONESHOT:
-                __setup_APIC_LVTT(calibration_result,
+                __setup_APIC_LVTT(lapic_timer_frequency,
                                   mode != CLOCK_EVT_MODE_PERIODIC, 1);
                 break;
         case CLOCK_EVT_MODE_UNUSED:
@@ -638,6 +638,25 @@ static int __init calibrate_APIC_clock(void)
         long delta, deltatsc;
         int pm_referenced = 0;
 
+        /**
+         * check if lapic timer has already been calibrated by platform
+         * specific routine, such as tsc calibration code. if so, we just fill
+         * in the clockevent structure and return.
+         */
+
+        if (lapic_timer_frequency) {
+                apic_printk(APIC_VERBOSE, "lapic timer already calibrated %d\n",
+                                lapic_timer_frequency);
+                lapic_clockevent.mult = div_sc(lapic_timer_frequency/APIC_DIVISOR,
+                                        TICK_NSEC, lapic_clockevent.shift);
+                lapic_clockevent.max_delta_ns =
+                        clockevent_delta2ns(0x7FFFFF, &lapic_clockevent);
+                lapic_clockevent.min_delta_ns =
+                        clockevent_delta2ns(0xF, &lapic_clockevent);
+                lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
+                return 0;
+        }
+
         local_irq_disable();
 
         /* Replace the global interrupt handler */
@@ -679,12 +698,12 @@ static int __init calibrate_APIC_clock(void)
         lapic_clockevent.min_delta_ns =
                 clockevent_delta2ns(0xF, &lapic_clockevent);
 
-        calibration_result = (delta * APIC_DIVISOR) / LAPIC_CAL_LOOPS;
+        lapic_timer_frequency = (delta * APIC_DIVISOR) / LAPIC_CAL_LOOPS;
 
         apic_printk(APIC_VERBOSE, "..... delta %ld\n", delta);
         apic_printk(APIC_VERBOSE, "..... mult: %u\n", lapic_clockevent.mult);
         apic_printk(APIC_VERBOSE, "..... calibration result: %u\n",
-                    calibration_result);
+                    lapic_timer_frequency);
 
         if (cpu_has_tsc) {
                 apic_printk(APIC_VERBOSE, "..... CPU clock speed is "
@@ -695,13 +714,13 @@ static int __init calibrate_APIC_clock(void)
 
         apic_printk(APIC_VERBOSE, "..... host bus clock speed is "
                     "%u.%04u MHz.\n",
-                    calibration_result / (1000000 / HZ),
-                    calibration_result % (1000000 / HZ));
+                    lapic_timer_frequency / (1000000 / HZ),
+                    lapic_timer_frequency % (1000000 / HZ));
 
         /*
          * Do a sanity check on the APIC calibration result
          */
-        if (calibration_result < (1000000 / HZ)) {
+        if (lapic_timer_frequency < (1000000 / HZ)) {
                 local_irq_enable();
                 pr_warning("APIC frequency too slow, disabling apic timer\n");
                 return -1;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 3c31fa98af6d..6d939d7847e2 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -193,10 +193,8 @@ int __init arch_early_irq_init(void)
         struct irq_cfg *cfg;
         int count, node, i;
 
-        if (!legacy_pic->nr_legacy_irqs) {
-                nr_irqs_gsi = 0;
+        if (!legacy_pic->nr_legacy_irqs)
                 io_apic_irqs = ~0UL;
-        }
 
         for (i = 0; i < nr_ioapics; i++) {
                 ioapics[i].saved_registers =
@@ -1696,6 +1694,7 @@ __apicdebuginit(void) print_IO_APICs(void)
         int ioapic_idx;
         struct irq_cfg *cfg;
         unsigned int irq;
+        struct irq_chip *chip;
 
         printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
         for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
@@ -1716,6 +1715,10 @@ __apicdebuginit(void) print_IO_APICs(void)
         for_each_active_irq(irq) {
                 struct irq_pin_list *entry;
 
+                chip = irq_get_chip(irq);
+                if (chip != &ioapic_chip)
+                        continue;
+
                 cfg = irq_get_chip_data(irq);
                 if (!cfg)
                         continue;
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 62ae3001ae02..9d59bbacd4e3 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -93,6 +93,8 @@ static int __init early_get_pnodeid(void)
 
         if (node_id.s.part_number == UV2_HUB_PART_NUMBER)
                 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
+        if (node_id.s.part_number == UV2_HUB_PART_NUMBER_X)
+                uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
 
         uv_hub_info->hub_revision = uv_min_hub_revision_id;
         pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index c7e46cb35327..0bab2b18bb20 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -442,8 +442,6 @@ static void __cpuinit bsp_init_amd(struct cpuinfo_x86 *c)
 
 static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 {
-        u32 dummy;
-
         early_init_amd_mc(c);
 
         /*
@@ -473,12 +471,12 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
                         set_cpu_cap(c, X86_FEATURE_EXTD_APICID);
         }
 #endif
-
-        rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
 }
 
 static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 {
+        u32 dummy;
+
 #ifdef CONFIG_SMP
         unsigned long long value;
 
@@ -657,6 +655,8 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
                         checking_wrmsrl(MSR_AMD64_MCx_MASK(4), mask);
                 }
         }
+
+        rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
 }
 
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c
index 6199232161cf..319882ef848d 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -208,7 +208,7 @@ static int inject_init(void)
         if (!alloc_cpumask_var(&mce_inject_cpumask, GFP_KERNEL))
                 return -ENOMEM;
         printk(KERN_INFO "Machine check injector initialized\n");
-        mce_chrdev_ops.write = mce_write;
+        register_mce_write_callback(mce_write);
         register_nmi_handler(NMI_LOCAL, mce_raise_notify, 0,
                                 "mce_notify");
         return 0;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 362056aefeb4..2af127d4c3d1 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1634,16 +1634,35 @@ static long mce_chrdev_ioctl(struct file *f, unsigned int cmd,
         }
 }
 
-/* Modified in mce-inject.c, so not static or const */
-struct file_operations mce_chrdev_ops = {
+static ssize_t (*mce_write)(struct file *filp, const char __user *ubuf,
+                            size_t usize, loff_t *off);
+
+void register_mce_write_callback(ssize_t (*fn)(struct file *filp,
+                             const char __user *ubuf,
+                             size_t usize, loff_t *off))
+{
+        mce_write = fn;
+}
+EXPORT_SYMBOL_GPL(register_mce_write_callback);
+
+ssize_t mce_chrdev_write(struct file *filp, const char __user *ubuf,
+                         size_t usize, loff_t *off)
+{
+        if (mce_write)
+                return mce_write(filp, ubuf, usize, off);
+        else
+                return -EINVAL;
+}
+
+static const struct file_operations mce_chrdev_ops = {
         .open                   = mce_chrdev_open,
         .release                = mce_chrdev_release,
         .read                   = mce_chrdev_read,
+        .write                  = mce_chrdev_write,
         .poll                   = mce_chrdev_poll,
         .unlocked_ioctl         = mce_chrdev_ioctl,
         .llseek                 = no_llseek,
 };
-EXPORT_SYMBOL_GPL(mce_chrdev_ops);
 
 static struct miscdevice mce_chrdev_device = {
         MISC_MCELOG_MINOR,
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index a71efcdbb092..97b26356e9ee 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -547,6 +547,7 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
 
                 if (tmp != mask_lo) {
                         printk(KERN_WARNING "mtrr: your BIOS has configured an incorrect mask, fixing it.\n");
+                        add_taint(TAINT_FIRMWARE_WORKAROUND);
                         mask_lo = tmp;
                 }
         }
@@ -693,6 +694,7 @@ static void prepare_set(void) __acquires(set_atomicity_lock)
 
         /* Disable MTRRs, and set the default type to uncached */
         mtrr_wrmsr(MSR_MTRRdefType, deftype_lo & ~0xcff, deftype_hi);
+        wbinvd();
 }
 
 static void post_set(void) __releases(set_atomicity_lock)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 640891014b2a..2bda212a0010 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -312,12 +312,8 @@ int x86_setup_perfctr(struct perf_event *event)
                         return -EOPNOTSUPP;
         }
 
-        /*
-         * Do not allow config1 (extended registers) to propagate,
-         * there's no sane user-space generalization yet:
-         */
         if (attr->type == PERF_TYPE_RAW)
-                return 0;
+                return x86_pmu_extra_regs(event->attr.config, event);
 
         if (attr->type == PERF_TYPE_HW_CACHE)
                 return set_ext_hw_attr(hwc, event);
@@ -588,7 +584,7 @@ done:
                                 x86_pmu.put_event_constraints(cpuc, cpuc->event_list[i]);
                 }
         }
-        return num ? -ENOSPC : 0;
+        return num ? -EINVAL : 0;
 }
 
 /*
@@ -607,7 +603,7 @@ static int collect_events(struct cpu_hw_events *cpuc, struct perf_event *leader,
 
         if (is_x86_event(leader)) {
                 if (n >= max_count)
-                        return -ENOSPC;
+                        return -EINVAL;
                 cpuc->event_list[n] = leader;
                 n++;
         }
@@ -620,7 +616,7 @@ static int collect_events(struct cpu_hw_events *cpuc, struct perf_event *leader,
                         continue;
 
                 if (n >= max_count)
-                        return -ENOSPC;
+                        return -EINVAL;
 
                 cpuc->event_list[n] = event;
                 n++;
@@ -1316,7 +1312,7 @@ static int validate_event(struct perf_event *event)
         c = x86_pmu.get_event_constraints(fake_cpuc, event);
 
         if (!c || !c->weight)
-                ret = -ENOSPC;
+                ret = -EINVAL;
 
         if (x86_pmu.put_event_constraints)
                 x86_pmu.put_event_constraints(fake_cpuc, event);
@@ -1341,7 +1337,7 @@ static int validate_group(struct perf_event *event)
 {
         struct perf_event *leader = event->group_leader;
         struct cpu_hw_events *fake_cpuc;
-        int ret = -ENOSPC, n;
+        int ret = -EINVAL, n;
 
         fake_cpuc = allocate_fake_cpuc();
         if (IS_ERR(fake_cpuc))
diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
index ab6343d21825..3b8a2d30d14e 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c
@@ -199,8 +199,7 @@ static int force_ibs_eilvt_setup(void)
                 goto out;
         }
 
-        pr_err(FW_BUG "using offset %d for IBS interrupts\n", offset);
-        pr_err(FW_BUG "workaround enabled for IBS LVT offset\n");
+        pr_info("IBS: LVT offset %d assigned\n", offset);
 
         return 0;
 out:
@@ -265,19 +264,23 @@ perf_ibs_cpu_notifier(struct notifier_block *self, unsigned long action, void *h
 static __init int amd_ibs_init(void)
 {
         u32 caps;
-        int ret;
+        int ret = -EINVAL;
 
         caps = __get_ibs_caps();
         if (!caps)
                 return -ENODEV; /* ibs not supported by the cpu */
 
-        if (!ibs_eilvt_valid()) {
-                ret = force_ibs_eilvt_setup();
-                if (ret) {
-                        pr_err("Failed to setup IBS, %d\n", ret);
-                        return ret;
-                }
-        }
+        /*
+         * Force LVT offset assignment for family 10h: The offsets are
+         * not assigned by the BIOS for this family, so the OS is
+         * responsible for doing it. If the OS assignment fails, fall
+         * back to BIOS settings and try to setup this.
+         */
+        if (boot_cpu_data.x86 == 0x10)
+                force_ibs_eilvt_setup();
+
+        if (!ibs_eilvt_valid())
+                goto out;
 
         get_online_cpus();
         ibs_caps = caps;
@@ -287,7 +290,11 @@ static __init int amd_ibs_init(void)
         smp_call_function(setup_APIC_ibs, NULL, 1);
         put_online_cpus();
 
-        return perf_event_ibs_init();
+        ret = perf_event_ibs_init();
+out:
+        if (ret)
+                pr_err("Failed to setup IBS, %d\n", ret);
+        return ret;
 }
 
 /* Since we need the pci subsystem to init ibs we can't do this earlier: */
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 2be5ebe99872..8d601b18bf9f 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1545,6 +1545,13 @@ static void intel_clovertown_quirks(void)
         x86_pmu.pebs_constraints = NULL;
 }
 
+static void intel_sandybridge_quirks(void)
+{
+        printk(KERN_WARNING "PEBS disabled due to CPU errata.\n");
+        x86_pmu.pebs = 0;
+        x86_pmu.pebs_constraints = NULL;
+}
+
 __init int intel_pmu_init(void)
 {
         union cpuid10_edx edx;
@@ -1694,6 +1701,7 @@ __init int intel_pmu_init(void)
                 break;
 
         case 42: /* SandyBridge */
+                x86_pmu.quirks = intel_sandybridge_quirks;
         case 45: /* SandyBridge, "Romely-EP" */
                 memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
                        sizeof(hw_cache_event_ids));
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index c0d238f49db8..73da6b64f5b7 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -493,6 +493,7 @@ static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
         unsigned long from = cpuc->lbr_entries[0].from;
         unsigned long old_to, to = cpuc->lbr_entries[0].to;
         unsigned long ip = regs->ip;
+        int is_64bit = 0;
 
         /*
          * We don't need to fixup if the PEBS assist is fault like
@@ -544,7 +545,10 @@ static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
                 } else
                         kaddr = (void *)to;
 
-                kernel_insn_init(&insn, kaddr);
+#ifdef CONFIG_X86_64
+                is_64bit = kernel_ip(to) || !test_thread_flag(TIF_IA32);
+#endif
+                insn_init(&insn, kaddr, is_64bit);
                 insn_get_length(&insn);
                 to += insn.length;
         } while (to < ip);
diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index 492bf1358a7c..ef484d9d0a25 100644
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -1268,7 +1268,7 @@ reserve:
         }
 
 done:
-        return num ? -ENOSPC : 0;
+        return num ? -EINVAL : 0;
 }
 
 static __initconst const struct x86_pmu p4_pmu = {
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index 3b97a80ce329..c99f9ed013d5 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -116,16 +116,16 @@ void show_registers(struct pt_regs *regs)
                 for (i = 0; i < code_len; i++, ip++) {
                         if (ip < (u8 *)PAGE_OFFSET ||
                                         probe_kernel_address(ip, c)) {
-                                printk(" Bad EIP value.");
+                                printk(KERN_CONT " Bad EIP value.");
                                 break;
                         }
                         if (ip == (u8 *)regs->ip)
-                                printk("<%02x> ", c);
+                                printk(KERN_CONT "<%02x> ", c);
                         else
-                                printk("%02x ", c);
+                                printk(KERN_CONT "%02x ", c);
                 }
         }
-        printk("\n");
+        printk(KERN_CONT "\n");
 }
 
 int is_valid_bugaddr(unsigned long ip)
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 19853ad8afc5..6d728d9284bd 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -284,16 +284,16 @@ void show_registers(struct pt_regs *regs)
                 for (i = 0; i < code_len; i++, ip++) {
                         if (ip < (u8 *)PAGE_OFFSET ||
                                         probe_kernel_address(ip, c)) {
-                                printk(" Bad RIP value.");
+                                printk(KERN_CONT " Bad RIP value.");
                                 break;
                         }
                         if (ip == (u8 *)regs->ip)
-                                printk("<%02x> ", c);
+                                printk(KERN_CONT "<%02x> ", c);
                         else
-                                printk("%02x ", c);
+                                printk(KERN_CONT "%02x ", c);
                 }
         }
-        printk("\n");
+        printk(KERN_CONT "\n");
 }
 
 int is_valid_bugaddr(unsigned long ip)
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index b946a9eac7d9..1bb0bf4d92cd 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -1049,6 +1049,14 @@ int hpet_rtc_timer_init(void)
 }
 EXPORT_SYMBOL_GPL(hpet_rtc_timer_init);
 
+static void hpet_disable_rtc_channel(void)
+{
+        unsigned long cfg;
+        cfg = hpet_readl(HPET_T1_CFG);
+        cfg &= ~HPET_TN_ENABLE;
+        hpet_writel(cfg, HPET_T1_CFG);
+}
+
 /*
  * The functions below are called from rtc driver.
  * Return 0 if HPET is not being used.
@@ -1060,6 +1068,9 @@ int hpet_mask_rtc_irq_bit(unsigned long bit_mask)
                 return 0;
 
         hpet_rtc_flags &= ~bit_mask;
+        if (unlikely(!hpet_rtc_flags))
+                hpet_disable_rtc_channel();
+
         return 1;
 }
 EXPORT_SYMBOL_GPL(hpet_mask_rtc_irq_bit);
@@ -1125,15 +1136,11 @@ EXPORT_SYMBOL_GPL(hpet_rtc_dropped_irq);
 
 static void hpet_rtc_timer_reinit(void)
 {
-        unsigned int cfg, delta;
+        unsigned int delta;
         int lost_ints = -1;
 
-        if (unlikely(!hpet_rtc_flags)) {
-                cfg = hpet_readl(HPET_T1_CFG);
-                cfg &= ~HPET_TN_ENABLE;
-                hpet_writel(cfg, HPET_T1_CFG);
-                return;
-        }
+        if (unlikely(!hpet_rtc_flags))
+                hpet_disable_rtc_channel();
 
         if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
                 delta = hpet_default_delta;
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index acf8fbf8fbda..69bca468c47a 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -38,6 +38,9 @@ static inline void stack_overflow_check(struct pt_regs *regs)
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
         u64 curbase = (u64)task_stack_page(current);
 
+        if (user_mode_vm(regs))
+                return;
+
         WARN_ONCE(regs->sp >= curbase &&
                   regs->sp <= curbase + THREAD_SIZE &&
                   regs->sp <  curbase + sizeof(struct thread_info) +
diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index c1a0188e29ae..44842d756b29 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -74,9 +74,10 @@ static cycle_t kvm_clock_read(void)
         struct pvclock_vcpu_time_info *src;
         cycle_t ret;
 
-        src = &get_cpu_var(hv_clock);
+        preempt_disable_notrace();
+        src = &__get_cpu_var(hv_clock);
         ret = pvclock_clocksource_read(src);
-        put_cpu_var(hv_clock);
+        preempt_enable_notrace();
         return ret;
 }
 
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index f2d2a664e797..9d46f5e43b51 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -256,7 +256,7 @@ static int __init microcode_dev_init(void)
         return 0;
 }
 
-static void microcode_dev_exit(void)
+static void __exit microcode_dev_exit(void)
 {
         misc_deregister(&microcode_dev);
 }
@@ -519,10 +519,8 @@ static int __init microcode_init(void)
 
         microcode_pdev = platform_device_register_simple("microcode", -1,
                                                          NULL, 0);
-        if (IS_ERR(microcode_pdev)) {
-                microcode_dev_exit();
+        if (IS_ERR(microcode_pdev))
                 return PTR_ERR(microcode_pdev);
-        }
 
         get_online_cpus();
         mutex_lock(&microcode_mutex);
@@ -532,14 +530,12 @@ static int __init microcode_init(void)
         mutex_unlock(&microcode_mutex);
         put_online_cpus();
 
-        if (error) {
-                platform_device_unregister(microcode_pdev);
-                return error;
-        }
+        if (error)
+                goto out_pdev;
 
         error = microcode_dev_init();
         if (error)
-                return error;
+                goto out_sysdev_driver;
 
         register_syscore_ops(&mc_syscore_ops);
         register_hotcpu_notifier(&mc_cpu_notifier);
@@ -548,6 +544,20 @@ static int __init microcode_init(void)
                 " <tigran@aivazian.fsnet.co.uk>, Peter Oruba\n");
 
         return 0;
+
+out_sysdev_driver:
+        get_online_cpus();
+        mutex_lock(&microcode_mutex);
+
+        sysdev_driver_unregister(&cpu_sysdev_class, &mc_sysdev_driver);
+
+        mutex_unlock(&microcode_mutex);
+        put_online_cpus();
+
+out_pdev:
+        platform_device_unregister(microcode_pdev);
+        return error;
+
 }
 module_init(microcode_init);
 
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 9103b89c145a..0741b062a304 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -95,8 +95,8 @@ static void __init MP_bus_info(struct mpc_bus *m)
         }
 #endif
 
+        set_bit(m->busid, mp_bus_not_pci);
         if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
-                set_bit(m->busid, mp_bus_not_pci);
 #if defined(CONFIG_EISA) || defined(CONFIG_MCA)
                 mp_bus_id_to_type[m->busid] = MP_BUS_ISA;
 #endif
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index b9c8628974af..e88f37b58ddd 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -29,6 +29,7 @@
 #include <asm/traps.h>
 #include <asm/mach_traps.h>
 #include <asm/nmi.h>
+#include <asm/x86_init.h>
 
 #define NMI_MAX_NAMELEN 16
 struct nmiaction {
@@ -348,7 +349,7 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
 
         /* Non-CPU-specific NMI: NMI sources can be processed on any CPU */
         raw_spin_lock(&nmi_reason_lock);
-        reason = get_nmi_reason();
+        reason = x86_platform.get_nmi_reason();
 
         if (reason & NMI_REASON_MASK) {
                 if (reason & NMI_REASON_SERR)
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index b9b3b1a51643..ee5d4fbd53b4 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -403,6 +403,14 @@ void default_idle(void)
 EXPORT_SYMBOL(default_idle);
 #endif
 
+bool set_pm_idle_to_default(void)
+{
+        bool ret = !!pm_idle;
+
+        pm_idle = default_idle;
+
+        return ret;
+}
 void stop_this_cpu(void *dummy)
 {
         local_irq_disable();
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index b78643d0f9a5..03920a15a632 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -553,4 +553,17 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC,
                         quirk_amd_nb_node);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_LINK,
                         quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F0,
+                        quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F1,
+                        quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F2,
+                        quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F3,
+                        quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F4,
+                        quirk_amd_nb_node);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F5,
+                        quirk_amd_nb_node);
+
 #endif
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index e334be1182b9..37a458b521a6 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -124,7 +124,7 @@ __setup("reboot=", reboot_setup);
  */
 
 /*
- * Some machines require the "reboot=b"  commandline option,
+ * Some machines require the "reboot=b" or "reboot=k"  commandline options,
  * this quirk makes that automatic.
  */
 static int __init set_bios_reboot(const struct dmi_system_id *d)
@@ -136,6 +136,15 @@ static int __init set_bios_reboot(const struct dmi_system_id *d)
         return 0;
 }
 
+static int __init set_kbd_reboot(const struct dmi_system_id *d)
+{
+        if (reboot_type != BOOT_KBD) {
+                reboot_type = BOOT_KBD;
+                printk(KERN_INFO "%s series board detected. Selecting KBD-method for reboot.\n", d->ident);
+        }
+        return 0;
+}
+
 static struct dmi_system_id __initdata reboot_dmi_table[] = {
         {       /* Handle problems with rebooting on Dell E520's */
                 .callback = set_bios_reboot,
@@ -295,7 +304,7 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                 },
         },
         { /* Handle reboot issue on Acer Aspire one */
-                .callback = set_bios_reboot,
+                .callback = set_kbd_reboot,
                 .ident = "Acer Aspire One A110",
                 .matches = {
                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
@@ -443,6 +452,14 @@ static struct dmi_system_id __initdata pci_reboot_dmi_table[] = {
                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6420"),
                 },
         },
+        {       /* Handle problems with rebooting on the OptiPlex 990. */
+                .callback = set_pci_reboot,
+                .ident = "Dell OptiPlex 990",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 990"),
+                },
+        },
         { }
 };
 
diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index 348ce016a835..af6db6ec5b2a 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -12,6 +12,7 @@
 #include <asm/vsyscall.h>
 #include <asm/x86_init.h>
 #include <asm/time.h>
+#include <asm/mrst.h>
 
 #ifdef CONFIG_X86_32
 /*
@@ -242,6 +243,10 @@ static __init int add_rtc_cmos(void)
         if (of_have_populated_dt())
                 return 0;
 
+        /* Intel MID platforms don't have ioport rtc */
+        if (mrst_identify_cpu())
+                return -ENODEV;
+
         platform_device_register(&rtc_device);
         dev_info(&rtc_device.dev,
                  "registered platform RTC device (no PNP device found)\n");
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index afaf38447ef5..cf0ef986cb6d 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1045,6 +1045,8 @@ void __init setup_arch(char **cmdline_p)
 
         x86_init.timers.wallclock_init();
 
+        x86_platform.wallclock_init();
+
         mcheck_init();
 
         arch_init_ideal_nops();
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 6f164bd5e14d..c1d6cd549397 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -21,12 +21,14 @@
 #include <asm/pat.h>
 #include <asm/tsc.h>
 #include <asm/iommu.h>
+#include <asm/mach_traps.h>
 
 void __cpuinit x86_init_noop(void) { }
 void __init x86_init_uint_noop(unsigned int unused) { }
 void __init x86_init_pgd_noop(pgd_t *unused) { }
 int __init iommu_init_noop(void) { return 0; }
 void iommu_shutdown_noop(void) { }
+void wallclock_init_noop(void) { }
 
 /*
  * The platform setup functions are preset with the default functions
@@ -97,11 +99,13 @@ static int default_i8042_detect(void) { return 1; };
 
 struct x86_platform_ops x86_platform = {
         .calibrate_tsc                  = native_calibrate_tsc,
+        .wallclock_init                 = wallclock_init_noop,
         .get_wallclock                  = mach_get_cmos_time,
         .set_wallclock                  = mach_set_rtc_mmss,
         .iommu_shutdown                 = iommu_shutdown_noop,
         .is_untracked_pat_range         = is_ISA_range,
         .nmi_init                       = default_nmi_init,
+        .get_nmi_reason                 = default_get_nmi_reason,
         .i8042_detect                   = default_i8042_detect
 };