Merge tag 'ib-mfd-regulator-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into regulator-tps65090

Immutable branch between MFD and Regulator due for v3.16 merge-window.

6 files changed, 94 insertions, 63 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index eeee23ff75ef..68317c80de7f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -598,7 +598,6 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 {
         struct mce m;
         int i;
-        unsigned long *v;
 
         this_cpu_inc(mce_poll_count);
 
@@ -618,8 +617,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
                 if (!(m.status & MCI_STATUS_VAL))
                         continue;
 
-                v = &get_cpu_var(mce_polled_error);
-                set_bit(0, v);
+                this_cpu_write(mce_polled_error, 1);
                 /*
                  * Uncorrected or signalled events are handled by the exception
                  * handler when it is enabled, so don't process those here.
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c
index 3bdb95ae8c43..9a316b21df8b 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -42,7 +42,7 @@ static DEFINE_PER_CPU(mce_banks_t, mce_banks_owned);
  * cmci_discover_lock protects against parallel discovery attempts
  * which could race against each other.
  */
-static DEFINE_RAW_SPINLOCK(cmci_discover_lock);
+static DEFINE_SPINLOCK(cmci_discover_lock);
 
 #define CMCI_THRESHOLD          1
 #define CMCI_POLL_INTERVAL      (30 * HZ)
@@ -144,14 +144,14 @@ static void cmci_storm_disable_banks(void)
         int bank;
         u64 val;
 
-        raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+        spin_lock_irqsave(&cmci_discover_lock, flags);
         owned = __get_cpu_var(mce_banks_owned);
         for_each_set_bit(bank, owned, MAX_NR_BANKS) {
                 rdmsrl(MSR_IA32_MCx_CTL2(bank), val);
                 val &= ~MCI_CTL2_CMCI_EN;
                 wrmsrl(MSR_IA32_MCx_CTL2(bank), val);
         }
-        raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+        spin_unlock_irqrestore(&cmci_discover_lock, flags);
 }
 
 static bool cmci_storm_detect(void)
@@ -211,7 +211,7 @@ static void cmci_discover(int banks)
         int i;
         int bios_wrong_thresh = 0;
 
-        raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+        spin_lock_irqsave(&cmci_discover_lock, flags);
         for (i = 0; i < banks; i++) {
                 u64 val;
                 int bios_zero_thresh = 0;
@@ -266,7 +266,7 @@ static void cmci_discover(int banks)
                         WARN_ON(!test_bit(i, __get_cpu_var(mce_poll_banks)));
                 }
         }
-        raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+        spin_unlock_irqrestore(&cmci_discover_lock, flags);
         if (mca_cfg.bios_cmci_threshold && bios_wrong_thresh) {
                 pr_info_once(
                         "bios_cmci_threshold: Some banks do not have valid thresholds set\n");
@@ -316,10 +316,10 @@ void cmci_clear(void)
 
         if (!cmci_supported(&banks))
                 return;
-        raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+        spin_lock_irqsave(&cmci_discover_lock, flags);
         for (i = 0; i < banks; i++)
                 __cmci_disable_bank(i);
-        raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+        spin_unlock_irqrestore(&cmci_discover_lock, flags);
 }
 
 static void cmci_rediscover_work_func(void *arg)
@@ -360,9 +360,9 @@ void cmci_disable_bank(int bank)
         if (!cmci_supported(&banks))
                 return;
 
-        raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+        spin_lock_irqsave(&cmci_discover_lock, flags);
         __cmci_disable_bank(bank);
-        raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+        spin_unlock_irqrestore(&cmci_discover_lock, flags);
 }
 
 static void intel_init_cmci(void)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_rapl.c b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
index 059218ed5208..7c87424d4140 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
@@ -59,7 +59,7 @@
 #define INTEL_RAPL_PKG          0x2     /* pseudo-encoding */
 #define RAPL_IDX_RAM_NRG_STAT   2       /* DRAM */
 #define INTEL_RAPL_RAM          0x3     /* pseudo-encoding */
-#define RAPL_IDX_PP1_NRG_STAT   3       /* DRAM */
+#define RAPL_IDX_PP1_NRG_STAT   3       /* gpu */
 #define INTEL_RAPL_PP1          0x4     /* pseudo-encoding */
 
 /* Clients have PP0, PKG */
@@ -72,6 +72,12 @@
                          1<<RAPL_IDX_PKG_NRG_STAT|\
                          1<<RAPL_IDX_RAM_NRG_STAT)
 
+/* Servers have PP0, PKG, RAM, PP1 */
+#define RAPL_IDX_HSW    (1<<RAPL_IDX_PP0_NRG_STAT|\
+                         1<<RAPL_IDX_PKG_NRG_STAT|\
+                         1<<RAPL_IDX_RAM_NRG_STAT|\
+                         1<<RAPL_IDX_PP1_NRG_STAT)
+
 /*
  * event code: LSB 8 bits, passed in attr->config
  * any other bit is reserved
@@ -425,6 +431,24 @@ static struct attribute *rapl_events_cln_attr[] = {
         NULL,
 };
 
+static struct attribute *rapl_events_hsw_attr[] = {
+        EVENT_PTR(rapl_cores),
+        EVENT_PTR(rapl_pkg),
+        EVENT_PTR(rapl_gpu),
+        EVENT_PTR(rapl_ram),
+
+        EVENT_PTR(rapl_cores_unit),
+        EVENT_PTR(rapl_pkg_unit),
+        EVENT_PTR(rapl_gpu_unit),
+        EVENT_PTR(rapl_ram_unit),
+
+        EVENT_PTR(rapl_cores_scale),
+        EVENT_PTR(rapl_pkg_scale),
+        EVENT_PTR(rapl_gpu_scale),
+        EVENT_PTR(rapl_ram_scale),
+        NULL,
+};
+
 static struct attribute_group rapl_pmu_events_group = {
         .name = "events",
         .attrs = NULL, /* patched at runtime */
@@ -511,6 +535,7 @@ static int rapl_cpu_prepare(int cpu)
         struct rapl_pmu *pmu = per_cpu(rapl_pmu, cpu);
         int phys_id = topology_physical_package_id(cpu);
         u64 ms;
+        u64 msr_rapl_power_unit_bits;
 
         if (pmu)
                 return 0;
@@ -518,6 +543,9 @@ static int rapl_cpu_prepare(int cpu)
         if (phys_id < 0)
                 return -1;
 
+        if (!rdmsrl_safe(MSR_RAPL_POWER_UNIT, &msr_rapl_power_unit_bits))
+                return -1;
+
         pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu));
         if (!pmu)
                 return -1;
@@ -531,8 +559,7 @@ static int rapl_cpu_prepare(int cpu)
          *
          * we cache in local PMU instance
          */
-        rdmsrl(MSR_RAPL_POWER_UNIT, pmu->hw_unit);
-        pmu->hw_unit = (pmu->hw_unit >> 8) & 0x1FULL;
+        pmu->hw_unit = (msr_rapl_power_unit_bits >> 8) & 0x1FULL;
         pmu->pmu = &rapl_pmu_class;
 
         /*
@@ -631,11 +658,14 @@ static int __init rapl_pmu_init(void)
         switch (boot_cpu_data.x86_model) {
         case 42: /* Sandy Bridge */
         case 58: /* Ivy Bridge */
-        case 60: /* Haswell */
-        case 69: /* Haswell-Celeron */
                 rapl_cntr_mask = RAPL_IDX_CLN;
                 rapl_pmu_events_group.attrs = rapl_events_cln_attr;
                 break;
+        case 60: /* Haswell */
+        case 69: /* Haswell-Celeron */
+                rapl_cntr_mask = RAPL_IDX_HSW;
+                rapl_pmu_events_group.attrs = rapl_events_hsw_attr;
+                break;
         case 45: /* Sandy Bridge-EP */
         case 62: /* IvyTown */
                 rapl_cntr_mask = RAPL_IDX_SRV;
@@ -650,7 +680,9 @@ static int __init rapl_pmu_init(void)
         cpu_notifier_register_begin();
 
         for_each_online_cpu(cpu) {
-                rapl_cpu_prepare(cpu);
+                ret = rapl_cpu_prepare(cpu);
+                if (ret)
+                        goto out;
                 rapl_cpu_init(cpu);
         }
 
@@ -673,6 +705,7 @@ static int __init rapl_pmu_init(void)
                 hweight32(rapl_cntr_mask),
                 ktime_to_ms(pmu->timer_interval));
 
+out:
         cpu_notifier_register_done();
 
         return 0;
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index b0cc3809723d..6e2537c32190 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -240,7 +240,7 @@ static u32 __init intel_stolen_base(int num, int slot, int func, size_t stolen_s
         return base;
 }
 
-#define KB(x)   ((x) * 1024)
+#define KB(x)   ((x) * 1024UL)
 #define MB(x)   (KB (KB (x)))
 #define GB(x)   (MB (KB (x)))
 
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index 79a3f9682871..61b17dc2c277 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -897,9 +897,10 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
         struct kprobe *cur = kprobe_running();
         struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
 
-        switch (kcb->kprobe_status) {
-        case KPROBE_HIT_SS:
-        case KPROBE_REENTER:
+        if (unlikely(regs->ip == (unsigned long)cur->ainsn.insn)) {
+                /* This must happen on single-stepping */
+                WARN_ON(kcb->kprobe_status != KPROBE_HIT_SS &&
+                        kcb->kprobe_status != KPROBE_REENTER);
                 /*
                  * We are here because the instruction being single
                  * stepped caused a page fault. We reset the current
@@ -914,9 +915,8 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                 else
                         reset_current_kprobe();
                 preempt_enable_no_resched();
-                break;
-        case KPROBE_HIT_ACTIVE:
-        case KPROBE_HIT_SSDONE:
+        } else if (kcb->kprobe_status == KPROBE_HIT_ACTIVE ||
+                   kcb->kprobe_status == KPROBE_HIT_SSDONE) {
                 /*
                  * We increment the nmissed count for accounting,
                  * we can also use npre/npostfault count for accounting
@@ -945,10 +945,8 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                  * fixup routine could not handle it,
                  * Let do_page_fault() fix it.
                  */
-                break;
-        default:
-                break;
         }
+
         return 0;
 }
 
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 654b46574b91..3399d3a99730 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -114,8 +114,8 @@ EXPORT_SYMBOL(machine_real_restart);
  */
 static int __init set_pci_reboot(const struct dmi_system_id *d)
 {
-        if (reboot_type != BOOT_CF9) {
-                reboot_type = BOOT_CF9;
+        if (reboot_type != BOOT_CF9_FORCE) {
+                reboot_type = BOOT_CF9_FORCE;
                 pr_info("%s series board detected. Selecting %s-method for reboots.\n",
                         d->ident, "PCI");
         }
@@ -458,20 +458,23 @@ void __attribute__((weak)) mach_reboot_fixups(void)
 }
 
 /*
- * Windows compatible x86 hardware expects the following on reboot:
+ * To the best of our knowledge Windows compatible x86 hardware expects
+ * the following on reboot:
  *
  * 1) If the FADT has the ACPI reboot register flag set, try it
  * 2) If still alive, write to the keyboard controller
  * 3) If still alive, write to the ACPI reboot register again
  * 4) If still alive, write to the keyboard controller again
  * 5) If still alive, call the EFI runtime service to reboot
- * 6) If still alive, write to the PCI IO port 0xCF9 to reboot
- * 7) If still alive, inform BIOS to do a proper reboot
+ * 6) If no EFI runtime service, call the BIOS to do a reboot
  *
- * If the machine is still alive at this stage, it gives up. We default to
- * following the same pattern, except that if we're still alive after (7) we'll
- * try to force a triple fault and then cycle between hitting the keyboard
- * controller and doing that
+ * We default to following the same pattern. We also have
+ * two other reboot methods: 'triple fault' and 'PCI', which
+ * can be triggered via the reboot= kernel boot option or
+ * via quirks.
+ *
+ * This means that this function can never return, it can misbehave
+ * by not rebooting properly and hanging.
  */
 static void native_machine_emergency_restart(void)
 {
@@ -492,6 +495,11 @@ static void native_machine_emergency_restart(void)
         for (;;) {
                 /* Could also try the reset bit in the Hammer NB */
                 switch (reboot_type) {
+                case BOOT_ACPI:
+                        acpi_reboot();
+                        reboot_type = BOOT_KBD;
+                        break;
+
                 case BOOT_KBD:
                         mach_reboot_fixups(); /* For board specific fixups */
 
@@ -509,43 +517,29 @@ static void native_machine_emergency_restart(void)
                         }
                         break;
 
-                case BOOT_TRIPLE:
-                        load_idt(&no_idt);
-                        __asm__ __volatile__("int3");
-
-                        /* We're probably dead after this, but... */
-                        reboot_type = BOOT_KBD;
-                        break;
-
-                case BOOT_BIOS:
-                        machine_real_restart(MRR_BIOS);
-
-                        /* We're probably dead after this, but... */
-                        reboot_type = BOOT_TRIPLE;
-                        break;
-
-                case BOOT_ACPI:
-                        acpi_reboot();
-                        reboot_type = BOOT_KBD;
-                        break;
-
                 case BOOT_EFI:
                         if (efi_enabled(EFI_RUNTIME_SERVICES))
                                 efi.reset_system(reboot_mode == REBOOT_WARM ?
                                                  EFI_RESET_WARM :
                                                  EFI_RESET_COLD,
                                                  EFI_SUCCESS, 0, NULL);
-                        reboot_type = BOOT_CF9_COND;
+                        reboot_type = BOOT_BIOS;
+                        break;
+
+                case BOOT_BIOS:
+                        machine_real_restart(MRR_BIOS);
+
+                        /* We're probably dead after this, but... */
+                        reboot_type = BOOT_CF9_SAFE;
                         break;
 
-                case BOOT_CF9:
+                case BOOT_CF9_FORCE:
                         port_cf9_safe = true;
                         /* Fall through */
 
-                case BOOT_CF9_COND:
+                case BOOT_CF9_SAFE:
                         if (port_cf9_safe) {
-                                u8 reboot_code = reboot_mode == REBOOT_WARM ?
-                                        0x06 : 0x0E;
+                                u8 reboot_code = reboot_mode == REBOOT_WARM ?  0x06 : 0x0E;
                                 u8 cf9 = inb(0xcf9) & ~reboot_code;
                                 outb(cf9|2, 0xcf9); /* Request hard reset */
                                 udelay(50);
@@ -553,7 +547,15 @@ static void native_machine_emergency_restart(void)
                                 outb(cf9|reboot_code, 0xcf9);
                                 udelay(50);
                         }
-                        reboot_type = BOOT_BIOS;
+                        reboot_type = BOOT_TRIPLE;
+                        break;
+
+                case BOOT_TRIPLE:
+                        load_idt(&no_idt);
+                        __asm__ __volatile__("int3");
+
+                        /* We're probably dead after this, but... */
+                        reboot_type = BOOT_KBD;
                         break;
                 }
         }