Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/powermac: Build fix with SMP and CPU hotplug
  powerpc/perf_event: Skip updating kernel counters if register value shrinks
  powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabled
  powerpc: Fix oops if scan_dispatch_log is called too early
  powerpc/pseries: Use a kmem cache for DTL buffers
  powerpc/kexec: Fix regression causing compile failure on UP
  powerpc/85xx: disable Suspend support if SMP enabled
  powerpc/e500mc: Remove CPU_FTR_MAYBE_CAN_NAP/CPU_FTR_MAYBE_CAN_DOZE
  powerpc/book3e: Fix CPU feature handling on 64-bit e5500
  powerpc: Check device status before adding serial device
  powerpc/85xx: Don't add disabled PCIe devices

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index b6ff882..8f4d50b 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -209,7 +209,7 @@ config ARCH_HIBERNATION_POSSIBLE
 config ARCH_SUSPEND_POSSIBLE
        def_bool y
        depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
-                  PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
+                  (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
 
 config PPC_DCR_NATIVE
        bool

diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index be3cdf9..1833d1a 100644 (file)
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -382,10 +382,12 @@ extern const char *powerpc_base_platform;
 #define CPU_FTRS_E500_2        (CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB | \
            CPU_FTR_SPE_COMP | CPU_FTR_MAYBE_CAN_NAP | \
            CPU_FTR_NODSISRALIGN | CPU_FTR_NOEXECUTE)
-#define CPU_FTRS_E500MC        (CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB | \
-           CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_NODSISRALIGN | \
+#define CPU_FTRS_E500MC        (CPU_FTR_USE_TB | CPU_FTR_NODSISRALIGN | \
            CPU_FTR_L2CSR | CPU_FTR_LWSYNC | CPU_FTR_NOEXECUTE | \
            CPU_FTR_DBELL)
+#define CPU_FTRS_E5500 (CPU_FTR_USE_TB | CPU_FTR_NODSISRALIGN | \
+           CPU_FTR_L2CSR | CPU_FTR_LWSYNC | CPU_FTR_NOEXECUTE | \
+           CPU_FTR_DBELL | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD)
 #define CPU_FTRS_GENERIC_32    (CPU_FTR_COMMON | CPU_FTR_NODSISRALIGN)
 
 /* 64-bit CPUs */
@@ -435,11 +437,15 @@ extern const char *powerpc_base_platform;
 #define CPU_FTRS_COMPATIBLE    (CPU_FTR_USE_TB | CPU_FTR_PPCAS_ARCH_V2)
 
 #ifdef __powerpc64__
+#ifdef CONFIG_PPC_BOOK3E
+#define CPU_FTRS_POSSIBLE      (CPU_FTRS_E5500)
+#else
 #define CPU_FTRS_POSSIBLE      \
            (CPU_FTRS_POWER3 | CPU_FTRS_RS64 | CPU_FTRS_POWER4 |        \
            CPU_FTRS_PPC970 | CPU_FTRS_POWER5 | CPU_FTRS_POWER6 |       \
            CPU_FTRS_POWER7 | CPU_FTRS_CELL | CPU_FTRS_PA6T |           \
            CPU_FTR_1T_SEGMENT | CPU_FTR_VSX)
+#endif
 #else
 enum {
        CPU_FTRS_POSSIBLE =
@@ -473,16 +479,21 @@ enum {
 #endif
 #ifdef CONFIG_E500
            CPU_FTRS_E500 | CPU_FTRS_E500_2 | CPU_FTRS_E500MC |
+           CPU_FTRS_E5500 |
 #endif
            0,
 };
 #endif /* __powerpc64__ */
 
 #ifdef __powerpc64__
+#ifdef CONFIG_PPC_BOOK3E
+#define CPU_FTRS_ALWAYS                (CPU_FTRS_E5500)
+#else
 #define CPU_FTRS_ALWAYS                \
            (CPU_FTRS_POWER3 & CPU_FTRS_RS64 & CPU_FTRS_POWER4 &        \
            CPU_FTRS_PPC970 & CPU_FTRS_POWER5 & CPU_FTRS_POWER6 &       \
            CPU_FTRS_POWER7 & CPU_FTRS_CELL & CPU_FTRS_PA6T & CPU_FTRS_POSSIBLE)
+#endif
 #else
 enum {
        CPU_FTRS_ALWAYS =
@@ -513,6 +524,7 @@ enum {
 #endif
 #ifdef CONFIG_E500
            CPU_FTRS_E500 & CPU_FTRS_E500_2 & CPU_FTRS_E500MC &
+           CPU_FTRS_E5500 &
 #endif
            CPU_FTRS_POSSIBLE,
 };

diff --git a/arch/powerpc/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h
index 811f04a..8d1569c 100644 (file)
--- a/arch/powerpc/include/asm/pte-common.h
+++ b/arch/powerpc/include/asm/pte-common.h
@@ -162,7 +162,7 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
  * on platforms where such control is possible.
  */
 #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\
-       defined(CONFIG_KPROBES)
+       defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
 #define PAGE_KERNEL_TEXT       PAGE_KERNEL_X
 #else
 #define PAGE_KERNEL_TEXT       PAGE_KERNEL_ROX

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index c9b68d0..b9602ee 100644 (file)
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1973,7 +1973,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                .pvr_mask               = 0xffff0000,
                .pvr_value              = 0x80240000,
                .cpu_name               = "e5500",
-               .cpu_features           = CPU_FTRS_E500MC,
+               .cpu_features           = CPU_FTRS_E5500,
                .cpu_user_features      = COMMON_USER_BOOKE,
                .mmu_features           = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS |
                        MMU_FTR_USE_TLBILX,

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 3d3d416..5b5e1f0 100644 (file)
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -163,7 +163,7 @@ static void crash_kexec_prepare_cpus(int cpu)
 }
 
 /* wait for all the CPUs to hit real mode but timeout if they don't come in */
-#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
+#ifdef CONFIG_PPC_STD_MMU_64
 static void crash_kexec_wait_realmode(int cpu)
 {
        unsigned int msecs;
@@ -188,9 +188,7 @@ static void crash_kexec_wait_realmode(int cpu)
        }
        mb();
 }
-#else
-static inline void crash_kexec_wait_realmode(int cpu) {}
-#endif
+#endif /* CONFIG_PPC_STD_MMU_64 */
 
 /*
  * This function will be called by secondary cpus or by kexec cpu
@@ -235,7 +233,9 @@ void crash_kexec_secondary(struct pt_regs *regs)
        crash_ipi_callback(regs);
 }
 
-#else
+#else  /* ! CONFIG_SMP */
+static inline void crash_kexec_wait_realmode(int cpu) {}
+
 static void crash_kexec_prepare_cpus(int cpu)
 {
        /*
@@ -255,7 +255,7 @@ void crash_kexec_secondary(struct pt_regs *regs)
 {
        cpus_in_sr = CPU_MASK_NONE;
 }
-#endif
+#endif /* CONFIG_SMP */
 
 /*
  * Register a function to be called on shutdown.  Only use this if you

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index c834757..2b97b80 100644 (file)
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -330,9 +330,11 @@ void __init find_legacy_serial_ports(void)
                if (!parent)
                        continue;
                if (of_match_node(legacy_serial_parents, parent) != NULL) {
-                       index = add_legacy_soc_port(np, np);
-                       if (index >= 0 && np == stdout)
-                               legacy_serial_console = index;
+                       if (of_device_is_available(np)) {
+                               index = add_legacy_soc_port(np, np);
+                               if (index >= 0 && np == stdout)
+                                       legacy_serial_console = index;
+                       }
                }
                of_node_put(parent);
        }

diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index c4063b7..822f630 100644 (file)
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -398,6 +398,25 @@ static int check_excludes(struct perf_event **ctrs, unsigned int cflags[],
        return 0;
 }
 
+static u64 check_and_compute_delta(u64 prev, u64 val)
+{
+       u64 delta = (val - prev) & 0xfffffffful;
+
+       /*
+        * POWER7 can roll back counter values, if the new value is smaller
+        * than the previous value it will cause the delta and the counter to
+        * have bogus values unless we rolled a counter over.  If a coutner is
+        * rolled back, it will be smaller, but within 256, which is the maximum
+        * number of events to rollback at once.  If we dectect a rollback
+        * return 0.  This can lead to a small lack of precision in the
+        * counters.
+        */
+       if (prev > val && (prev - val) < 256)
+               delta = 0;
+
+       return delta;
+}
+
 static void power_pmu_read(struct perf_event *event)
 {
        s64 val, delta, prev;
@@ -416,10 +435,11 @@ static void power_pmu_read(struct perf_event *event)
                prev = local64_read(&event->hw.prev_count);
                barrier();
                val = read_pmc(event->hw.idx);
+               delta = check_and_compute_delta(prev, val);
+               if (!delta)
+                       return;
        } while (local64_cmpxchg(&event->hw.prev_count, prev, val) != prev);
 
-       /* The counters are only 32 bits wide */
-       delta = (val - prev) & 0xfffffffful;
        local64_add(delta, &event->count);
        local64_sub(delta, &event->hw.period_left);
 }
@@ -449,8 +469,9 @@ static void freeze_limited_counters(struct cpu_hw_events *cpuhw,
                val = (event->hw.idx == 5) ? pmc5 : pmc6;
                prev = local64_read(&event->hw.prev_count);
                event->hw.idx = 0;
-               delta = (val - prev) & 0xfffffffful;
-               local64_add(delta, &event->count);
+               delta = check_and_compute_delta(prev, val);
+               if (delta)
+                       local64_add(delta, &event->count);
        }
 }
 
@@ -458,14 +479,16 @@ static void thaw_limited_counters(struct cpu_hw_events *cpuhw,
                                  unsigned long pmc5, unsigned long pmc6)
 {
        struct perf_event *event;
-       u64 val;
+       u64 val, prev;
        int i;
 
        for (i = 0; i < cpuhw->n_limited; ++i) {
                event = cpuhw->limited_counter[i];
                event->hw.idx = cpuhw->limited_hwidx[i];
                val = (event->hw.idx == 5) ? pmc5 : pmc6;
-               local64_set(&event->hw.prev_count, val);
+               prev = local64_read(&event->hw.prev_count);
+               if (check_and_compute_delta(prev, val))
+                       local64_set(&event->hw.prev_count, val);
                perf_event_update_userpage(event);
        }
 }
@@ -1197,7 +1220,7 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
 
        /* we don't have to worry about interrupts here */
        prev = local64_read(&event->hw.prev_count);
-       delta = (val - prev) & 0xfffffffful;
+       delta = check_and_compute_delta(prev, val);
        local64_add(delta, &event->count);
 
        /*

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 375480c..f33acfd 100644 (file)
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -229,6 +229,9 @@ static u64 scan_dispatch_log(u64 stop_tb)
        u64 stolen = 0;
        u64 dtb;
 
+       if (!dtl)
+               return 0;
+
        if (i == vpa->dtl_idx)
                return 0;
        while (i < vpa->dtl_idx) {

diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index a830c5e..bc5f0dc 100644 (file)
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -842,6 +842,7 @@ static void __devinit smp_core99_setup_cpu(int cpu_nr)
        mpic_setup_this_cpu();
 }
 
+#ifdef CONFIG_PPC64
 #ifdef CONFIG_HOTPLUG_CPU
 static int smp_core99_cpu_notify(struct notifier_block *self,
                                 unsigned long action, void *hcpu)
@@ -879,7 +880,6 @@ static struct notifier_block __cpuinitdata smp_core99_cpu_nb = {
 
 static void __init smp_core99_bringup_done(void)
 {
-#ifdef CONFIG_PPC64
        extern void g5_phy_disable_cpu1(void);
 
        /* Close i2c bus if it was used for tb sync */
@@ -894,14 +894,14 @@ static void __init smp_core99_bringup_done(void)
                set_cpu_present(1, false);
                g5_phy_disable_cpu1();
        }
-#endif /* CONFIG_PPC64 */
-
 #ifdef CONFIG_HOTPLUG_CPU
        register_cpu_notifier(&smp_core99_cpu_nb);
 #endif
+
        if (ppc_md.progress)
                ppc_md.progress("smp_core99_bringup_done", 0x349);
 }
+#endif /* CONFIG_PPC64 */
 
 #ifdef CONFIG_HOTPLUG_CPU
 
@@ -975,7 +975,9 @@ static void pmac_cpu_die(void)
 struct smp_ops_t core99_smp_ops = {
        .message_pass   = smp_mpic_message_pass,
        .probe          = smp_core99_probe,
+#ifdef CONFIG_PPC64
        .bringup_done   = smp_core99_bringup_done,
+#endif
        .kick_cpu       = smp_core99_kick_cpu,
        .setup_cpu      = smp_core99_setup_cpu,
        .give_timebase  = smp_core99_give_timebase,

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 0007241..6c42cfd 100644 (file)
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -287,14 +287,22 @@ static int alloc_dispatch_logs(void)
        int cpu, ret;
        struct paca_struct *pp;
        struct dtl_entry *dtl;
+       struct kmem_cache *dtl_cache;
 
        if (!firmware_has_feature(FW_FEATURE_SPLPAR))
                return 0;
 
+       dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
+                                               DISPATCH_LOG_BYTES, 0, NULL);
+       if (!dtl_cache) {
+               pr_warn("Failed to create dispatch trace log buffer cache\n");
+               pr_warn("Stolen time statistics will be unreliable\n");
+               return 0;
+       }
+
        for_each_possible_cpu(cpu) {
                pp = &paca[cpu];
-               dtl = kmalloc_node(DISPATCH_LOG_BYTES, GFP_KERNEL,
-                                  cpu_to_node(cpu));
+               dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
                if (!dtl) {
                        pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
                                cpu);

diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index f8f7f28..68ca929 100644 (file)
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -324,6 +324,11 @@ int __init fsl_add_bridge(struct device_node *dev, int is_primary)
        struct resource rsrc;
        const int *bus_range;
 
+       if (!of_device_is_available(dev)) {
+               pr_warning("%s: disabled\n", dev->full_name);
+               return -ENODEV;
+       }
+
        pr_debug("Adding PCI host bridge %s\n", dev->full_name);
 
        /* Fetch host bridge registers address */