Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: add X86_FEATURE_XMM4_2 definitions
  x86: fix cpufreq + sched_clock() regression
  x86: fix HPET regression in 2.6.26 versus 2.6.25, check hpet against BAR, v3
  x86: do not enable TSC notifier if we don't need it
  x86 MCE: Fix CPU hotplug problem with multiple multicore AMD CPUs
  x86: fix: make PCI ECS for AMD CPUs hotplug capable
  x86: fix: do not run code in amd_bus.c on non-AMD CPUs

5 files changed, 139 insertions, 20 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 65a339678ece..726a5fcdf341 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -759,6 +759,7 @@ static struct sysdev_class mce_sysclass = {
 };
 
 DEFINE_PER_CPU(struct sys_device, device_mce);
+void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu) __cpuinitdata;
 
 /* Why are there no generic functions for this? */
 #define ACCESSOR(name, var, start) \
@@ -883,9 +884,13 @@ static int __cpuinit mce_cpu_callback(struct notifier_block *nfb,
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
                 mce_create_device(cpu);
+                if (threshold_cpu_callback)
+                        threshold_cpu_callback(action, cpu);
                 break;
         case CPU_DEAD:
         case CPU_DEAD_FROZEN:
+                if (threshold_cpu_callback)
+                        threshold_cpu_callback(action, cpu);
                 mce_remove_device(cpu);
                 break;
         }
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
index 88736cadbaa6..5eb390a4b2e9 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
@@ -628,6 +628,7 @@ static void threshold_remove_bank(unsigned int cpu, int bank)
         deallocate_threshold_block(cpu, bank);
 
 free_out:
+        kobject_del(b->kobj);
         kobject_put(b->kobj);
         kfree(b);
         per_cpu(threshold_banks, cpu)[bank] = NULL;
@@ -645,14 +646,11 @@ static void threshold_remove_device(unsigned int cpu)
 }
 
 /* get notified when a cpu comes on/off */
-static int __cpuinit threshold_cpu_callback(struct notifier_block *nfb,
-                                            unsigned long action, void *hcpu)
+static void __cpuinit amd_64_threshold_cpu_callback(unsigned long action,
+                                                     unsigned int cpu)
 {
-        /* cpu was unsigned int to begin with */
-        unsigned int cpu = (unsigned long)hcpu;
-
         if (cpu >= NR_CPUS)
-                goto out;
+                return;
 
         switch (action) {
         case CPU_ONLINE:
@@ -666,14 +664,8 @@ static int __cpuinit threshold_cpu_callback(struct notifier_block *nfb,
         default:
                 break;
         }
-      out:
-        return NOTIFY_OK;
 }
 
-static struct notifier_block threshold_cpu_notifier __cpuinitdata = {
-        .notifier_call = threshold_cpu_callback,
-};
-
 static __init int threshold_init_device(void)
 {
         unsigned lcpu = 0;
@@ -684,7 +676,7 @@ static __init int threshold_init_device(void)
                 if (err)
                         return err;
         }
-        register_hotcpu_notifier(&threshold_cpu_notifier);
+        threshold_cpu_callback = amd_64_threshold_cpu_callback;
         return 0;
 }
 
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 46af71676738..8e786b0d665a 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -314,7 +314,7 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
                         mark_tsc_unstable("cpufreq changes");
         }
 
-        set_cyc2ns_scale(tsc_khz_ref, freq->cpu);
+        set_cyc2ns_scale(tsc_khz, freq->cpu);
 
         return 0;
 }
@@ -325,6 +325,10 @@ static struct notifier_block time_cpufreq_notifier_block = {
 
 static int __init cpufreq_tsc(void)
 {
+        if (!cpu_has_tsc)
+                return 0;
+        if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
+                return 0;
         cpufreq_register_notifier(&time_cpufreq_notifier_block,
                                 CPUFREQ_TRANSITION_NOTIFIER);
         return 0;
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index dbf532369711..6a0fca78c362 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -1,6 +1,7 @@
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/topology.h>
+#include <linux/cpu.h>
 #include "pci.h"
 
 #ifdef CONFIG_X86_64
@@ -555,15 +556,17 @@ static int __init early_fill_mp_bus_info(void)
         return 0;
 }
 
-postcore_initcall(early_fill_mp_bus_info);
+#else  /* !CONFIG_X86_64 */
 
-#endif
+static int __init early_fill_mp_bus_info(void) { return 0; }
+
+#endif /* !CONFIG_X86_64 */
 
 /* common 32/64 bit code */
 
 #define ENABLE_CF8_EXT_CFG      (1ULL << 46)
 
-static void enable_pci_io_ecs_per_cpu(void *unused)
+static void enable_pci_io_ecs(void *unused)
 {
         u64 reg;
         rdmsrl(MSR_AMD64_NB_CFG, reg);
@@ -573,14 +576,51 @@ static void enable_pci_io_ecs_per_cpu(void *unused)
         }
 }
 
-static int __init enable_pci_io_ecs(void)
+static int __cpuinit amd_cpu_notify(struct notifier_block *self,
+                                    unsigned long action, void *hcpu)
 {
+        int cpu = (long)hcpu;
+        switch(action) {
+        case CPU_ONLINE:
+        case CPU_ONLINE_FROZEN:
+                smp_call_function_single(cpu, enable_pci_io_ecs, NULL, 0);
+                break;
+        default:
+                break;
+        }
+        return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata amd_cpu_notifier = {
+        .notifier_call  = amd_cpu_notify,
+};
+
+static int __init pci_io_ecs_init(void)
+{
+        int cpu;
+
         /* assume all cpus from fam10h have IO ECS */
         if (boot_cpu_data.x86 < 0x10)
                 return 0;
-        on_each_cpu(enable_pci_io_ecs_per_cpu, NULL, 1);
+
+        register_cpu_notifier(&amd_cpu_notifier);
+        for_each_online_cpu(cpu)
+                amd_cpu_notify(&amd_cpu_notifier, (unsigned long)CPU_ONLINE,
+                               (void *)(long)cpu);
         pci_probe |= PCI_HAS_IO_ECS;
+
+        return 0;
+}
+
+static int __init amd_postcore_init(void)
+{
+        if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+                return 0;
+
+        early_fill_mp_bus_info();
+        pci_io_ecs_init();
+
         return 0;
 }
 
-postcore_initcall(enable_pci_io_ecs);
+postcore_initcall(amd_postcore_init);
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 5807d1bc73f7..d765da913842 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -31,8 +31,11 @@
 #include <linux/ioport.h>
 #include <linux/errno.h>
 #include <linux/bootmem.h>
+#include <linux/acpi.h>
 
 #include <asm/pat.h>
+#include <asm/hpet.h>
+#include <asm/io_apic.h>
 
 #include "pci.h"
 
@@ -77,6 +80,77 @@ pcibios_align_resource(void *data, struct resource *res,
 }
 EXPORT_SYMBOL(pcibios_align_resource);
 
+static int check_res_with_valid(struct pci_dev *dev, struct resource *res)
+{
+        unsigned long base;
+        unsigned long size;
+        int i;
+
+        base = res->start;
+        size = (res->start == 0 && res->end == res->start) ? 0 :
+                 (res->end - res->start + 1);
+
+        if (!base || !size)
+                return 0;
+
+#ifdef CONFIG_HPET_TIMER
+        /* for hpet */
+        if (base == hpet_address && (res->flags & IORESOURCE_MEM)) {
+                dev_info(&dev->dev, "BAR has HPET at %08lx-%08lx\n",
+                                 base, base + size - 1);
+                return 1;
+        }
+#endif
+
+#ifdef CONFIG_X86_IO_APIC
+        for (i = 0; i < nr_ioapics; i++) {
+                unsigned long ioapic_phys = mp_ioapics[i].mp_apicaddr;
+
+                if (base == ioapic_phys && (res->flags & IORESOURCE_MEM)) {
+                        dev_info(&dev->dev, "BAR has ioapic at %08lx-%08lx\n",
+                                         base, base + size - 1);
+                        return 1;
+                }
+        }
+#endif
+
+#ifdef CONFIG_PCI_MMCONFIG
+        for (i = 0; i < pci_mmcfg_config_num; i++) {
+                unsigned long addr;
+
+                addr = pci_mmcfg_config[i].address;
+                if (base == addr && (res->flags & IORESOURCE_MEM)) {
+                        dev_info(&dev->dev, "BAR has MMCONFIG at %08lx-%08lx\n",
+                                         base, base + size - 1);
+                        return 1;
+                }
+        }
+#endif
+
+        return 0;
+}
+
+static int check_platform(struct pci_dev *dev, struct resource *res)
+{
+        struct resource *root = NULL;
+
+        /*
+         * forcibly insert it into the
+         * resource tree
+         */
+        if (res->flags & IORESOURCE_MEM)
+                root = &iomem_resource;
+        else if (res->flags & IORESOURCE_IO)
+                root = &ioport_resource;
+
+        if (root && check_res_with_valid(dev, res)) {
+                insert_resource(root, res);
+
+                return 1;
+        }
+
+        return 0;
+}
 /*
  *  Handle resources of PCI devices.  If the world were perfect, we could
  *  just allocate all the resource regions and do nothing more.  It isn't.
@@ -128,6 +202,8 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
                                 pr = pci_find_parent_resource(dev, r);
                                 if (!r->start || !pr ||
                                     request_resource(pr, r) < 0) {
+                                        if (check_platform(dev, r))
+                                                continue;
                                         dev_err(&dev->dev, "BAR %d: can't "
                                                 "allocate resource\n", idx);
                                         /*
@@ -171,6 +247,8 @@ static void __init pcibios_allocate_resources(int pass)
                                         r->flags, disabled, pass);
                                 pr = pci_find_parent_resource(dev, r);
                                 if (!pr || request_resource(pr, r) < 0) {
+                                        if (check_platform(dev, r))
+                                                continue;
                                         dev_err(&dev->dev, "BAR %d: can't "
                                                 "allocate resource\n", idx);
                                         /* We'll assign a new address later */