10 files changed, 75 insertions, 24 deletions

diff --git a/arch/x86/include/asm/amd_iommu_proto.h b/arch/x86/include/asm/amd_iommu_proto.h
index 4d817f9e6e77..d2544f1d705d 100644
--- a/arch/x86/include/asm/amd_iommu_proto.h
+++ b/arch/x86/include/asm/amd_iommu_proto.h
@@ -31,6 +31,7 @@ extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);
 extern int amd_iommu_init_devices(void);
 extern void amd_iommu_uninit_devices(void);
 extern void amd_iommu_init_notifier(void);
+extern void amd_iommu_init_api(void);
 #ifndef CONFIG_AMD_IOMMU_STATS
 
 static inline void amd_iommu_stats_init(void) { }
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 23824fef789c..adb0ba025702 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -980,7 +980,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
 {
         int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
         struct amd_iommu *iommu;
-        int i;
+        unsigned long i;
 
 #ifdef CONFIG_IOMMU_STRESS
         populate = false;
@@ -1489,11 +1489,14 @@ static void __detach_device(struct device *dev)
 {
         struct iommu_dev_data *dev_data = get_dev_data(dev);
         struct iommu_dev_data *alias_data;
+        struct protection_domain *domain;
         unsigned long flags;
 
         BUG_ON(!dev_data->domain);
 
-        spin_lock_irqsave(&dev_data->domain->lock, flags);
+        domain = dev_data->domain;
+
+        spin_lock_irqsave(&domain->lock, flags);
 
         if (dev_data->alias != dev) {
                 alias_data = get_dev_data(dev_data->alias);
@@ -1504,13 +1507,15 @@ static void __detach_device(struct device *dev)
         if (atomic_dec_and_test(&dev_data->bind))
                 do_detach(dev);
 
-        spin_unlock_irqrestore(&dev_data->domain->lock, flags);
+        spin_unlock_irqrestore(&domain->lock, flags);
 
         /*
          * If we run in passthrough mode the device must be assigned to the
-         * passthrough domain if it is detached from any other domain
+         * passthrough domain if it is detached from any other domain.
+         * Make sure we can deassign from the pt_domain itself.
          */
-        if (iommu_pass_through && dev_data->domain == NULL)
+        if (iommu_pass_through &&
+            (dev_data->domain == NULL && domain != pt_domain))
                 __attach_device(dev, pt_domain);
 }
 
@@ -2218,6 +2223,12 @@ static struct dma_map_ops amd_iommu_dma_ops = {
 /*
  * The function which clues the AMD IOMMU driver into dma_ops.
  */
+
+void __init amd_iommu_init_api(void)
+{
+        register_iommu(&amd_iommu_ops);
+}
+
 int __init amd_iommu_init_dma_ops(void)
 {
         struct amd_iommu *iommu;
@@ -2253,8 +2264,6 @@ int __init amd_iommu_init_dma_ops(void)
         /* Make the driver finally visible to the drivers */
         dma_ops = &amd_iommu_dma_ops;
 
-        register_iommu(&amd_iommu_ops);
-
         amd_iommu_stats_init();
 
         return 0;
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index fb490ce7dd55..9dc91b431470 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -1292,9 +1292,12 @@ static int __init amd_iommu_init(void)
                 ret = amd_iommu_init_passthrough();
         else
                 ret = amd_iommu_init_dma_ops();
+
         if (ret)
                 goto free;
 
+        amd_iommu_init_api();
+
         amd_iommu_init_notifier();
 
         enable_iommus();
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 1545bc0c9845..704bddcdf64d 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -203,6 +203,15 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                         DMI_MATCH(DMI_BOARD_NAME, "0T656F"),
                 },
         },
+        {       /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G*/
+                .callback = set_bios_reboot,
+                .ident = "Dell OptiPlex 760",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 760"),
+                        DMI_MATCH(DMI_BOARD_NAME, "0G919G"),
+                },
+        },
         {       /* Handle problems with rebooting on Dell 2400's */
                 .callback = set_bios_reboot,
                 .ident = "Dell PowerEdge 2400",
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f7b8b9894b22..5d9e40c58628 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -642,19 +642,27 @@ static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
                         DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix/MSC"),
                 },
         },
-        {
         /*
-         * AMI BIOS with low memory corruption was found on Intel DG45ID board.
-         * It hase different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
+         * AMI BIOS with low memory corruption was found on Intel DG45ID and
+         * DG45FC boards.
+         * It has a different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
          * match only DMI_BOARD_NAME and see if there is more bad products
          * with this vendor.
          */
+        {
                 .callback = dmi_low_memory_corruption,
                 .ident = "AMI BIOS",
                 .matches = {
                         DMI_MATCH(DMI_BOARD_NAME, "DG45ID"),
                 },
         },
+        {
+                .callback = dmi_low_memory_corruption,
+                .ident = "AMI BIOS",
+                .matches = {
+                        DMI_MATCH(DMI_BOARD_NAME, "DG45FC"),
+                },
+        },
 #endif
         {}
 };
diff --git a/arch/x86/kernel/uv_time.c b/arch/x86/kernel/uv_time.c
index 3c84aa001c11..2b75ef638dbc 100644
--- a/arch/x86/kernel/uv_time.c
+++ b/arch/x86/kernel/uv_time.c
@@ -282,10 +282,21 @@ static int uv_rtc_unset_timer(int cpu, int force)
 
 /*
  * Read the RTC.
+ *
+ * Starting with HUB rev 2.0, the UV RTC register is replicated across all
+ * cachelines of it's own page.  This allows faster simultaneous reads
+ * from a given socket.
  */
 static cycle_t uv_read_rtc(struct clocksource *cs)
 {
-        return (cycle_t)uv_read_local_mmr(UVH_RTC);
+        unsigned long offset;
+
+        if (uv_get_min_hub_revision_id() == 1)
+                offset = 0;
+        else
+                offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE;
+
+        return (cycle_t)uv_read_local_mmr(UVH_RTC | offset);
 }
 
 /*
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index cb88b1a0bd5f..3347f696edc7 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -222,7 +222,7 @@ static void nmi_cpu_switch(void *dummy)
 
         /* move to next set */
         si += model->num_counters;
-        if ((si > model->num_virt_counters) || (counter_config[si].count == 0))
+        if ((si >= model->num_virt_counters) || (counter_config[si].count == 0))
                 per_cpu(switch_index, cpu) = 0;
         else
                 per_cpu(switch_index, cpu) = si;
@@ -598,6 +598,7 @@ static int __init ppro_init(char **cpu_type)
         case 15: case 23:
                 *cpu_type = "i386/core_2";
                 break;
+        case 0x2e:
         case 26:
                 spec = &op_arch_perfmon_spec;
                 *cpu_type = "i386/core_i7";
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 1afb8968a342..34cf04e21795 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -729,9 +729,6 @@ int __init agp_amd64_init(void)
         if (agp_off)
                 return -EINVAL;
 
-        if (gart_iommu_aperture)
-                return agp_bridges_found ? 0 : -ENODEV;
-
         err = pci_register_driver(&agp_amd64_pci_driver);
         if (err < 0)
                 return err;
@@ -768,6 +765,14 @@ int __init agp_amd64_init(void)
         return err;
 }
 
+static int __init agp_amd64_mod_init(void)
+{
+        if (gart_iommu_aperture)
+                return agp_bridges_found ? 0 : -ENODEV;
+
+        return agp_amd64_init();
+}
+
 static void __exit agp_amd64_cleanup(void)
 {
         if (gart_iommu_aperture)
@@ -777,7 +782,7 @@ static void __exit agp_amd64_cleanup(void)
         pci_unregister_driver(&agp_amd64_pci_driver);
 }
 
-module_init(agp_amd64_init);
+module_init(agp_amd64_mod_init);
 module_exit(agp_amd64_cleanup);
 
 MODULE_AUTHOR("Dave Jones <davej@redhat.com>, Andi Kleen");
diff --git a/drivers/char/uv_mmtimer.c b/drivers/char/uv_mmtimer.c
index 867b67be9f0a..c7072ba14f48 100644
--- a/drivers/char/uv_mmtimer.c
+++ b/drivers/char/uv_mmtimer.c
@@ -89,13 +89,17 @@ static long uv_mmtimer_ioctl(struct file *file, unsigned int cmd,
         switch (cmd) {
         case MMTIMER_GETOFFSET: /* offset of the counter */
                 /*
-                 * UV RTC register is on its own page
+                 * Starting with HUB rev 2.0, the UV RTC register is
+                 * replicated across all cachelines of it's own page.
+                 * This allows faster simultaneous reads from a given socket.
+                 *
+                 * The offset returned is in 64 bit units.
                  */
-                if (PAGE_SIZE <= (1 << 16))
-                        ret = ((UV_LOCAL_MMR_BASE | UVH_RTC) & (PAGE_SIZE-1))
-                                / 8;
+                if (uv_get_min_hub_revision_id() == 1)
+                        ret = 0;
                 else
-                        ret = -ENOSYS;
+                        ret = ((uv_blade_processor_id() * L1_CACHE_BYTES) %
+                                        PAGE_SIZE) / 8;
                 break;
 
         case MMTIMER_GETRES: /* resolution of the clock in 10^-15 s */
@@ -115,8 +119,8 @@ static long uv_mmtimer_ioctl(struct file *file, unsigned int cmd,
                 ret = hweight64(UVH_RTC_REAL_TIME_CLOCK_MASK);
                 break;
 
-        case MMTIMER_MMAPAVAIL: /* can we mmap the clock into userspace? */
-                ret = (PAGE_SIZE <= (1 << 16)) ? 1 : 0;
+        case MMTIMER_MMAPAVAIL:
+                ret = 1;
                 break;
 
         case MMTIMER_GETCOUNTER:
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index 7d2f0b33e5a8..ba8b67039d13 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -587,7 +587,7 @@ out_unlock:
         return count;
 }
 
-const struct file_operations filter_fops = {
+static const struct file_operations filter_fops = {
         .read  = filter_read,
         .write = filter_write,
 };