Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [VIDEO] sunxvr500fb: Fix pseudo_palette array size
  [VIDEO] sunxvr2500fb: Fix pseudo_palette array size
  [VIDEO] ffb: The pseudo_palette is only 16 elements long
  [VIDEO]: Fix section mismatch warning in promcon.
  [ATA]: Back out bogus (SPARC64 && !PCI) Kconfig depends.
  [SPARC64]: Fill in gaps in non-PCI dma_*() NOP implementation.
  [SPARC64]: Fix {mc,smt}_capable().
  [SPARC64]: Make core and sibling groups equal on UltraSPARC-IV.
  [SPARC64]: Proper multi-core scheduling support.
  [SPARC64]: Provide mmu statistics via sysfs.
  [SPARC64]: Fix service channel hypervisor function names.
  [SPARC64]: Export basic cpu properties via sysfs.
  [SPARC64]: Move topology init code into new file, sysfs.c

7 files changed, 419 insertions, 42 deletions

diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index d8d19093d12..f964bf28d21 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -1,4 +1,4 @@
-# $Id: Makefile,v 1.70 2002/02/09 19:49:30 davem Exp $
+#
 # Makefile for the linux kernel.
 #
 
@@ -8,7 +8,7 @@ EXTRA_CFLAGS := -Werror
 extra-y		:= head.o init_task.o vmlinux.lds
 
 obj-y		:= process.o setup.o cpu.o idprom.o \
-		   traps.o auxio.o una_asm.o \
+		   traps.o auxio.o una_asm.o sysfs.o \
 		   irq.o ptrace.o time.o sys_sparc.o signal.o \
 		   unaligned.o central.o pci.o starfire.o semaphore.o \
 		   power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index ed712e0b337..7d1a11822a1 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -2514,9 +2514,9 @@ sun4v_ncs_request:
 	 nop
 	.size	sun4v_ncs_request, .-sun4v_ncs_request
 
-	.globl	sun4v_scv_send
-	.type	sun4v_scv_send,#function
-sun4v_scv_send:
+	.globl	sun4v_svc_send
+	.type	sun4v_svc_send,#function
+sun4v_svc_send:
 	save	%sp, -192, %sp
 	mov	%i0, %o0
 	mov	%i1, %o1
@@ -2526,11 +2526,11 @@ sun4v_scv_send:
 	stx	%o1, [%i3]
 	ret
 	restore
-	.size	sun4v_scv_send, .-sun4v_scv_send
+	.size	sun4v_svc_send, .-sun4v_svc_send
 
-	.globl	sun4v_scv_recv
-	.type	sun4v_scv_recv,#function
-sun4v_scv_recv:
+	.globl	sun4v_svc_recv
+	.type	sun4v_svc_recv,#function
+sun4v_svc_recv:
 	save	%sp, -192, %sp
 	mov	%i0, %o0
 	mov	%i1, %o1
@@ -2540,33 +2540,55 @@ sun4v_scv_recv:
 	stx	%o1, [%i3]
 	ret
 	restore
-	.size	sun4v_scv_recv, .-sun4v_scv_recv
+	.size	sun4v_svc_recv, .-sun4v_svc_recv
 
-	.globl	sun4v_scv_getstatus
-	.type	sun4v_scv_getstatus,#function
-sun4v_scv_getstatus:
+	.globl	sun4v_svc_getstatus
+	.type	sun4v_svc_getstatus,#function
+sun4v_svc_getstatus:
 	mov	HV_FAST_SVC_GETSTATUS, %o5
 	mov	%o1, %o4
 	ta	HV_FAST_TRAP
 	stx	%o1, [%o4]
 	retl
 	 nop
-	.size	sun4v_scv_getstatus, .-sun4v_scv_getstatus
+	.size	sun4v_svc_getstatus, .-sun4v_svc_getstatus
 
-	.globl	sun4v_scv_setstatus
-	.type	sun4v_scv_setstatus,#function
-sun4v_scv_setstatus:
+	.globl	sun4v_svc_setstatus
+	.type	sun4v_svc_setstatus,#function
+sun4v_svc_setstatus:
 	mov	HV_FAST_SVC_SETSTATUS, %o5
 	ta	HV_FAST_TRAP
 	retl
 	 nop
-	.size	sun4v_scv_setstatus, .-sun4v_scv_setstatus
+	.size	sun4v_svc_setstatus, .-sun4v_svc_setstatus
 
-	.globl	sun4v_scv_clrstatus
-	.type	sun4v_scv_clrstatus,#function
-sun4v_scv_clrstatus:
+	.globl	sun4v_svc_clrstatus
+	.type	sun4v_svc_clrstatus,#function
+sun4v_svc_clrstatus:
 	mov	HV_FAST_SVC_CLRSTATUS, %o5
 	ta	HV_FAST_TRAP
 	retl
 	 nop
-	.size	sun4v_scv_clrstatus, .-sun4v_scv_clrstatus
+	.size	sun4v_svc_clrstatus, .-sun4v_svc_clrstatus
+
+	.globl	sun4v_mmustat_conf
+	.type	sun4v_mmustat_conf,#function
+sun4v_mmustat_conf:
+	mov	%o1, %o4
+	mov	HV_FAST_MMUSTAT_CONF, %o5
+	ta	HV_FAST_TRAP
+	stx	%o1, [%o4]
+	retl
+	 nop
+	.size	sun4v_mmustat_conf, .-sun4v_mmustat_conf
+
+	.globl	sun4v_mmustat_info
+	.type	sun4v_mmustat_info,#function
+sun4v_mmustat_info:
+	mov	%o0, %o4
+	mov	HV_FAST_MMUSTAT_INFO, %o5
+	ta	HV_FAST_TRAP
+	stx	%o1, [%o4]
+	retl
+	 nop
+	.size	sun4v_mmustat_info, .-sun4v_mmustat_info
diff --git a/arch/sparc64/kernel/mdesc.c b/arch/sparc64/kernel/mdesc.c
index 9246c2cf957..f0e16045fb1 100644
--- a/arch/sparc64/kernel/mdesc.c
+++ b/arch/sparc64/kernel/mdesc.c
@@ -473,6 +473,53 @@ static void __init set_core_ids(void)
 	}
 }
 
+static void __init mark_proc_ids(struct mdesc_node *mp, int proc_id)
+{
+	int i;
+
+	for (i = 0; i < mp->num_arcs; i++) {
+		struct mdesc_node *t = mp->arcs[i].arc;
+		const u64 *id;
+
+		if (strcmp(mp->arcs[i].name, "back"))
+			continue;
+
+		if (strcmp(t->name, "cpu"))
+			continue;
+
+		id = md_get_property(t, "id", NULL);
+		if (*id < NR_CPUS)
+			cpu_data(*id).proc_id = proc_id;
+	}
+}
+
+static void __init __set_proc_ids(const char *exec_unit_name)
+{
+	struct mdesc_node *mp;
+	int idx;
+
+	idx = 0;
+	md_for_each_node_by_name(mp, exec_unit_name) {
+		const char *type;
+		int len;
+
+		type = md_get_property(mp, "type", &len);
+		if (!find_in_proplist(type, "int", len) &&
+		    !find_in_proplist(type, "integer", len))
+			continue;
+
+		mark_proc_ids(mp, idx);
+
+		idx++;
+	}
+}
+
+static void __init set_proc_ids(void)
+{
+	__set_proc_ids("exec_unit");
+	__set_proc_ids("exec-unit");
+}
+
 static void __init get_one_mondo_bits(const u64 *p, unsigned int *mask, unsigned char def)
 {
 	u64 val;
@@ -574,9 +621,15 @@ static void __init mdesc_fill_in_cpu_data(void)
 #endif
 
 		c->core_id = 0;
+		c->proc_id = -1;
 	}
 
+#ifdef CONFIG_SMP
+	sparc64_multi_core = 1;
+#endif
+
 	set_core_ids();
+	set_proc_ids();
 
 	smp_fill_in_sib_core_maps();
 }
diff --git a/arch/sparc64/kernel/prom.c b/arch/sparc64/kernel/prom.c
index dad4b3ba705..6f4a5284b0e 100644
--- a/arch/sparc64/kernel/prom.c
+++ b/arch/sparc64/kernel/prom.c
@@ -1781,6 +1781,10 @@ static void __init of_fill_in_cpu_data(void)
 			}
 
 			cpu_data(cpuid).core_id = portid + 1;
+			cpu_data(cpuid).proc_id = portid;
+#ifdef CONFIG_SMP
+			sparc64_multi_core = 1;
+#endif
 		} else {
 			cpu_data(cpuid).dcache_size =
 				of_getintprop_default(dp, "dcache-size", 16 * 1024);
@@ -1799,6 +1803,7 @@ static void __init of_fill_in_cpu_data(void)
 				of_getintprop_default(dp, "ecache-line-size", 64);
 
 			cpu_data(cpuid).core_id = 0;
+			cpu_data(cpuid).proc_id = -1;
 		}
 
 #ifdef CONFIG_SMP
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
index de9b4c13f1c..7490cc670a5 100644
--- a/arch/sparc64/kernel/setup.c
+++ b/arch/sparc64/kernel/setup.c
@@ -513,22 +513,3 @@ void sun_do_break(void)
 
 int serial_console = -1;
 int stop_a_enabled = 1;
-
-static int __init topology_init(void)
-{
-	int i, err;
-
-	err = -ENOMEM;
-
-	for_each_possible_cpu(i) {
-		struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
-		if (p) {
-			register_cpu(p, i);
-			err = 0;
-		}
-	}
-
-	return err;
-}
-
-subsys_initcall(topology_init);
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index c550bba3490..4dcd7d0b60f 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -44,6 +44,8 @@
 
 extern void calibrate_delay(void);
 
+int sparc64_multi_core __read_mostly;
+
 /* Please don't make this stuff initdata!!!  --DaveM */
 unsigned char boot_cpu_id;
 
@@ -51,6 +53,8 @@ cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE;
 cpumask_t phys_cpu_present_map __read_mostly = CPU_MASK_NONE;
 cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly =
 	{ [0 ... NR_CPUS-1] = CPU_MASK_NONE };
+cpumask_t cpu_core_map[NR_CPUS] __read_mostly =
+	{ [0 ... NR_CPUS-1] = CPU_MASK_NONE };
 static cpumask_t smp_commenced_mask;
 static cpumask_t cpu_callout_map;
 
@@ -1217,13 +1221,28 @@ void __devinit smp_fill_in_sib_core_maps(void)
 		unsigned int j;
 
 		if (cpu_data(i).core_id == 0) {
-			cpu_set(i, cpu_sibling_map[i]);
+			cpu_set(i, cpu_core_map[i]);
 			continue;
 		}
 
 		for_each_possible_cpu(j) {
 			if (cpu_data(i).core_id ==
 			    cpu_data(j).core_id)
+				cpu_set(j, cpu_core_map[i]);
+		}
+	}
+
+	for_each_possible_cpu(i) {
+		unsigned int j;
+
+		if (cpu_data(i).proc_id == -1) {
+			cpu_set(i, cpu_sibling_map[i]);
+			continue;
+		}
+
+		for_each_possible_cpu(j) {
+			if (cpu_data(i).proc_id ==
+			    cpu_data(j).proc_id)
 				cpu_set(j, cpu_sibling_map[i]);
 		}
 	}
diff --git a/arch/sparc64/kernel/sysfs.c b/arch/sparc64/kernel/sysfs.c
new file mode 100644
index 00000000000..cdb1477af89
--- /dev/null
+++ b/arch/sparc64/kernel/sysfs.c
@@ -0,0 +1,297 @@
+/* sysfs.c: Toplogy sysfs support code for sparc64.
+ *
+ * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
+ */
+#include <linux/sysdev.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#include <linux/percpu.h>
+#include <linux/init.h>
+
+#include <asm/hypervisor.h>
+#include <asm/spitfire.h>
+
+static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64)));
+
+#define SHOW_MMUSTAT_ULONG(NAME) \
+static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
+{ \
+	struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \
+	return sprintf(buf, "%lu\n", p->NAME); \
+} \
+static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL)
+
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte);
+
+static struct attribute *mmu_stat_attrs[] = {
+	&attr_immu_tsb_hits_ctx0_8k_tte.attr,
+	&attr_immu_tsb_ticks_ctx0_8k_tte.attr,
+	&attr_immu_tsb_hits_ctx0_64k_tte.attr,
+	&attr_immu_tsb_ticks_ctx0_64k_tte.attr,
+	&attr_immu_tsb_hits_ctx0_4mb_tte.attr,
+	&attr_immu_tsb_ticks_ctx0_4mb_tte.attr,
+	&attr_immu_tsb_hits_ctx0_256mb_tte.attr,
+	&attr_immu_tsb_ticks_ctx0_256mb_tte.attr,
+	&attr_immu_tsb_hits_ctxnon0_8k_tte.attr,
+	&attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,
+	&attr_immu_tsb_hits_ctxnon0_64k_tte.attr,
+	&attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,
+	&attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,
+	&attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,
+	&attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,
+	&attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,
+	&attr_dmmu_tsb_hits_ctx0_8k_tte.attr,
+	&attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,
+	&attr_dmmu_tsb_hits_ctx0_64k_tte.attr,
+	&attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,
+	&attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,
+	&attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,
+	&attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,
+	&attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,
+	&attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,
+	&attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,
+	&attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,
+	&attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,
+	&attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,
+	&attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,
+	&attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,
+	&attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,
+	NULL,
+};
+
+static struct attribute_group mmu_stat_group = {
+	.attrs = mmu_stat_attrs,
+	.name = "mmu_stats",
+};
+
+/* XXX convert to rusty's on_one_cpu */
+static unsigned long run_on_cpu(unsigned long cpu,
+			        unsigned long (*func)(unsigned long),
+				unsigned long arg)
+{
+	cpumask_t old_affinity = current->cpus_allowed;
+	unsigned long ret;
+
+	/* should return -EINVAL to userspace */
+	if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
+		return 0;
+
+	ret = func(arg);
+
+	set_cpus_allowed(current, old_affinity);
+
+	return ret;
+}
+
+static unsigned long read_mmustat_enable(unsigned long junk)
+{
+	unsigned long ra = 0;
+
+	sun4v_mmustat_info(&ra);
+
+	return ra != 0;
+}
+
+static unsigned long write_mmustat_enable(unsigned long val)
+{
+	unsigned long ra, orig_ra;
+
+	if (val)
+		ra = __pa(&per_cpu(mmu_stats, smp_processor_id()));
+	else
+		ra = 0UL;
+
+	return sun4v_mmustat_conf(ra, &orig_ra);
+}
+
+static ssize_t show_mmustat_enable(struct sys_device *s, char *buf)
+{
+	unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0);
+	return sprintf(buf, "%lx\n", val);
+}
+
+static ssize_t store_mmustat_enable(struct sys_device *s, const char *buf, size_t count)
+{
+	unsigned long val, err;
+	int ret = sscanf(buf, "%ld", &val);
+
+	if (ret != 1)
+		return -EINVAL;
+
+	err = run_on_cpu(s->id, write_mmustat_enable, val);
+	if (err)
+		return -EIO;
+
+	return count;
+}
+
+static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable);
+
+static int mmu_stats_supported;
+
+static int register_mmu_stats(struct sys_device *s)
+{
+	if (!mmu_stats_supported)
+		return 0;
+	sysdev_create_file(s, &attr_mmustat_enable);
+	return sysfs_create_group(&s->kobj, &mmu_stat_group);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void unregister_mmu_stats(struct sys_device *s)
+{
+	if (!mmu_stats_supported)
+		return;
+	sysfs_remove_group(&s->kobj, &mmu_stat_group);
+	sysdev_remove_file(s, &attr_mmustat_enable);
+}
+#endif
+
+#define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \
+static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
+{ \
+	cpuinfo_sparc *c = &cpu_data(dev->id); \
+	return sprintf(buf, "%lu\n", c->MEMBER); \
+}
+
+#define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \
+static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
+{ \
+	cpuinfo_sparc *c = &cpu_data(dev->id); \
+	return sprintf(buf, "%u\n", c->MEMBER); \
+}
+
+SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick);
+SHOW_CPUDATA_ULONG_NAME(udelay_val, udelay_val);
+SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size);
+SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size);
+SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size);
+SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size);
+SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size);
+SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size);
+
+static struct sysdev_attribute cpu_core_attrs[] = {
+	_SYSDEV_ATTR(clock_tick,          0444, show_clock_tick, NULL),
+	_SYSDEV_ATTR(udelay_val,          0444, show_udelay_val, NULL),
+	_SYSDEV_ATTR(l1_dcache_size,      0444, show_l1_dcache_size, NULL),
+	_SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
+	_SYSDEV_ATTR(l1_icache_size,      0444, show_l1_icache_size, NULL),
+	_SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
+	_SYSDEV_ATTR(l2_cache_size,       0444, show_l2_cache_size, NULL),
+	_SYSDEV_ATTR(l2_cache_line_size,  0444, show_l2_cache_line_size, NULL),
+};
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+static void register_cpu_online(unsigned int cpu)
+{
+	struct cpu *c = &per_cpu(cpu_devices, cpu);
+	struct sys_device *s = &c->sysdev;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
+		sysdev_create_file(s, &cpu_core_attrs[i]);
+
+	register_mmu_stats(s);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void unregister_cpu_online(unsigned int cpu)
+{
+	struct cpu *c = &per_cpu(cpu_devices, cpu);
+	struct sys_device *s = &c->sysdev;
+	int i;
+
+	unregister_mmu_stats(s);
+	for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
+		sysdev_remove_file(s, &cpu_core_attrs[i]);
+}
+#endif
+
+static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
+				      unsigned long action, void *hcpu)
+{
+	unsigned int cpu = (unsigned int)(long)hcpu;
+
+	switch (action) {
+	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
+		register_cpu_online(cpu);
+		break;
+#ifdef CONFIG_HOTPLUG_CPU
+	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
+		unregister_cpu_online(cpu);
+		break;
+#endif
+	}
+	return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
+	.notifier_call	= sysfs_cpu_notify,
+};
+
+static void __init check_mmu_stats(void)
+{
+	unsigned long dummy1, err;
+
+	if (tlb_type != hypervisor)
+		return;
+
+	err = sun4v_mmustat_info(&dummy1);
+	if (!err)
+		mmu_stats_supported = 1;
+}
+
+static int __init topology_init(void)
+{
+	int cpu;
+
+	check_mmu_stats();
+
+	register_cpu_notifier(&sysfs_cpu_nb);
+
+	for_each_possible_cpu(cpu) {
+		struct cpu *c = &per_cpu(cpu_devices, cpu);
+
+		register_cpu(c, cpu);
+		if (cpu_online(cpu))
+			register_cpu_online(cpu);
+	}
+
+	return 0;
+}
+
+subsys_initcall(topology_init);