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

Conflicts:
	drivers/mtd/mtd_blkdevs.c

Merge Grant's device-tree bits so that we can apply the subsequent fixes.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

10 files changed, 627 insertions, 73 deletions

diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index 046ace9c438..59eb8bdaa79 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -1,14 +1,9 @@
-ifeq ($(CONFIG_PPC64),y)
-EXTRA_CFLAGS		+= -mno-minimal-toc
-endif
-
-ifeq ($(CONFIG_PPC_PSERIES_DEBUG),y)
-EXTRA_CFLAGS		+= -DDEBUG
-endif
+ccflags-$(CONFIG_PPC64)			:= -mno-minimal-toc
+ccflags-$(CONFIG_PPC_PSERIES_DEBUG)	+= -DDEBUG
 
 obj-y			:= lpar.o hvCall.o nvram.o reconfig.o \
 			   setup.o iommu.o event_sources.o ras.o \
-			   firmware.o power.o dlpar.o
+			   firmware.o power.o dlpar.o mobility.o
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_XICS)	+= xics.o
 obj-$(CONFIG_SCANLOG)	+= scanlog.o
@@ -23,7 +18,7 @@ obj-$(CONFIG_MEMORY_HOTPLUG)	+= hotplug-memory.o
 obj-$(CONFIG_HVC_CONSOLE)	+= hvconsole.o
 obj-$(CONFIG_HVCS)		+= hvcserver.o
 obj-$(CONFIG_HCALL_STATS)	+= hvCall_inst.o
-obj-$(CONFIG_PHYP_DUMP)	+= phyp_dump.o
+obj-$(CONFIG_PHYP_DUMP)		+= phyp_dump.o
 obj-$(CONFIG_CMM)		+= cmm.o
 obj-$(CONFIG_DTL)		+= dtl.o
 
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index 72d8054fa73..b74a9230edc 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -33,7 +33,7 @@ struct cc_workarea {
 	u32	prop_offset;
 };
 
-static void dlpar_free_cc_property(struct property *prop)
+void dlpar_free_cc_property(struct property *prop)
 {
 	kfree(prop->name);
 	kfree(prop->value);
@@ -55,13 +55,12 @@ static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa)
 
 	prop->length = ccwa->prop_length;
 	value = (char *)ccwa + ccwa->prop_offset;
-	prop->value = kzalloc(prop->length, GFP_KERNEL);
+	prop->value = kmemdup(value, prop->length, GFP_KERNEL);
 	if (!prop->value) {
 		dlpar_free_cc_property(prop);
 		return NULL;
 	}
 
-	memcpy(prop->value, value, prop->length);
 	return prop;
 }
 
@@ -102,7 +101,7 @@ static void dlpar_free_one_cc_node(struct device_node *dn)
 	kfree(dn);
 }
 
-static void dlpar_free_cc_nodes(struct device_node *dn)
+void dlpar_free_cc_nodes(struct device_node *dn)
 {
 	if (dn->child)
 		dlpar_free_cc_nodes(dn->child);
diff --git a/arch/powerpc/platforms/pseries/dtl.c b/arch/powerpc/platforms/pseries/dtl.c
index a00addb5594..c371bc06434 100644
--- a/arch/powerpc/platforms/pseries/dtl.c
+++ b/arch/powerpc/platforms/pseries/dtl.c
@@ -23,37 +23,22 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/debugfs.h>
+#include <linux/spinlock.h>
 #include <asm/smp.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/firmware.h>
+#include <asm/lppaca.h>
 
 #include "plpar_wrappers.h"
 
-/*
- * Layout of entries in the hypervisor's DTL buffer. Although we don't
- * actually access the internals of an entry (we only need to know the size),
- * we might as well define it here for reference.
- */
-struct dtl_entry {
-	u8	dispatch_reason;
-	u8	preempt_reason;
-	u16	processor_id;
-	u32	enqueue_to_dispatch_time;
-	u32	ready_to_enqueue_time;
-	u32	waiting_to_ready_time;
-	u64	timebase;
-	u64	fault_addr;
-	u64	srr0;
-	u64	srr1;
-};
-
 struct dtl {
 	struct dtl_entry	*buf;
 	struct dentry		*file;
 	int			cpu;
 	int			buf_entries;
 	u64			last_idx;
+	spinlock_t		lock;
 };
 static DEFINE_PER_CPU(struct dtl, cpu_dtl);
 
@@ -72,25 +57,97 @@ static u8 dtl_event_mask = 0x7;
 static int dtl_buf_entries = (16 * 85);
 
 
-static int dtl_enable(struct dtl *dtl)
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+struct dtl_ring {
+	u64	write_index;
+	struct dtl_entry *write_ptr;
+	struct dtl_entry *buf;
+	struct dtl_entry *buf_end;
+	u8	saved_dtl_mask;
+};
+
+static DEFINE_PER_CPU(struct dtl_ring, dtl_rings);
+
+static atomic_t dtl_count;
+
+/*
+ * The cpu accounting code controls the DTL ring buffer, and we get
+ * given entries as they are processed.
+ */
+static void consume_dtle(struct dtl_entry *dtle, u64 index)
 {
-	unsigned long addr;
-	int ret, hwcpu;
+	struct dtl_ring *dtlr = &__get_cpu_var(dtl_rings);
+	struct dtl_entry *wp = dtlr->write_ptr;
+	struct lppaca *vpa = local_paca->lppaca_ptr;
 
-	/* only allow one reader */
-	if (dtl->buf)
-		return -EBUSY;
+	if (!wp)
+		return;
 
-	/* we need to store the original allocation size for use during read */
-	dtl->buf_entries = dtl_buf_entries;
+	*wp = *dtle;
+	barrier();
 
-	dtl->buf = kmalloc_node(dtl->buf_entries * sizeof(struct dtl_entry),
-			GFP_KERNEL, cpu_to_node(dtl->cpu));
-	if (!dtl->buf) {
-		printk(KERN_WARNING "%s: buffer alloc failed for cpu %d\n",
-				__func__, dtl->cpu);
-		return -ENOMEM;
-	}
+	/* check for hypervisor ring buffer overflow, ignore this entry if so */
+	if (index + N_DISPATCH_LOG < vpa->dtl_idx)
+		return;
+
+	++wp;
+	if (wp == dtlr->buf_end)
+		wp = dtlr->buf;
+	dtlr->write_ptr = wp;
+
+	/* incrementing write_index makes the new entry visible */
+	smp_wmb();
+	++dtlr->write_index;
+}
+
+static int dtl_start(struct dtl *dtl)
+{
+	struct dtl_ring *dtlr = &per_cpu(dtl_rings, dtl->cpu);
+
+	dtlr->buf = dtl->buf;
+	dtlr->buf_end = dtl->buf + dtl->buf_entries;
+	dtlr->write_index = 0;
+
+	/* setting write_ptr enables logging into our buffer */
+	smp_wmb();
+	dtlr->write_ptr = dtl->buf;
+
+	/* enable event logging */
+	dtlr->saved_dtl_mask = lppaca_of(dtl->cpu).dtl_enable_mask;
+	lppaca_of(dtl->cpu).dtl_enable_mask |= dtl_event_mask;
+
+	dtl_consumer = consume_dtle;
+	atomic_inc(&dtl_count);
+	return 0;
+}
+
+static void dtl_stop(struct dtl *dtl)
+{
+	struct dtl_ring *dtlr = &per_cpu(dtl_rings, dtl->cpu);
+
+	dtlr->write_ptr = NULL;
+	smp_wmb();
+
+	dtlr->buf = NULL;
+
+	/* restore dtl_enable_mask */
+	lppaca_of(dtl->cpu).dtl_enable_mask = dtlr->saved_dtl_mask;
+
+	if (atomic_dec_and_test(&dtl_count))
+		dtl_consumer = NULL;
+}
+
+static u64 dtl_current_index(struct dtl *dtl)
+{
+	return per_cpu(dtl_rings, dtl->cpu).write_index;
+}
+
+#else /* CONFIG_VIRT_CPU_ACCOUNTING */
+
+static int dtl_start(struct dtl *dtl)
+{
+	unsigned long addr;
+	int ret, hwcpu;
 
 	/* Register our dtl buffer with the hypervisor. The HV expects the
 	 * buffer size to be passed in the second word of the buffer */
@@ -102,34 +159,82 @@ static int dtl_enable(struct dtl *dtl)
 	if (ret) {
 		printk(KERN_WARNING "%s: DTL registration for cpu %d (hw %d) "
 		       "failed with %d\n", __func__, dtl->cpu, hwcpu, ret);
-		kfree(dtl->buf);
 		return -EIO;
 	}
 
 	/* set our initial buffer indices */
-	dtl->last_idx = lppaca[dtl->cpu].dtl_idx = 0;
+	lppaca_of(dtl->cpu).dtl_idx = 0;
 
 	/* ensure that our updates to the lppaca fields have occurred before
 	 * we actually enable the logging */
 	smp_wmb();
 
 	/* enable event logging */
-	lppaca[dtl->cpu].dtl_enable_mask = dtl_event_mask;
+	lppaca_of(dtl->cpu).dtl_enable_mask = dtl_event_mask;
 
 	return 0;
 }
 
-static void dtl_disable(struct dtl *dtl)
+static void dtl_stop(struct dtl *dtl)
 {
 	int hwcpu = get_hard_smp_processor_id(dtl->cpu);
 
-	lppaca[dtl->cpu].dtl_enable_mask = 0x0;
+	lppaca_of(dtl->cpu).dtl_enable_mask = 0x0;
 
 	unregister_dtl(hwcpu, __pa(dtl->buf));
+}
+
+static u64 dtl_current_index(struct dtl *dtl)
+{
+	return lppaca_of(dtl->cpu).dtl_idx;
+}
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
+
+static int dtl_enable(struct dtl *dtl)
+{
+	long int n_entries;
+	long int rc;
+	struct dtl_entry *buf = NULL;
 
+	/* only allow one reader */
+	if (dtl->buf)
+		return -EBUSY;
+
+	n_entries = dtl_buf_entries;
+	buf = kmalloc_node(n_entries * sizeof(struct dtl_entry),
+			GFP_KERNEL, cpu_to_node(dtl->cpu));
+	if (!buf) {
+		printk(KERN_WARNING "%s: buffer alloc failed for cpu %d\n",
+				__func__, dtl->cpu);
+		return -ENOMEM;
+	}
+
+	spin_lock(&dtl->lock);
+	rc = -EBUSY;
+	if (!dtl->buf) {
+		/* store the original allocation size for use during read */
+		dtl->buf_entries = n_entries;
+		dtl->buf = buf;
+		dtl->last_idx = 0;
+		rc = dtl_start(dtl);
+		if (rc)
+			dtl->buf = NULL;
+	}
+	spin_unlock(&dtl->lock);
+
+	if (rc)
+		kfree(buf);
+	return rc;
+}
+
+static void dtl_disable(struct dtl *dtl)
+{
+	spin_lock(&dtl->lock);
+	dtl_stop(dtl);
 	kfree(dtl->buf);
 	dtl->buf = NULL;
 	dtl->buf_entries = 0;
+	spin_unlock(&dtl->lock);
 }
 
 /* file interface */
@@ -157,8 +262,9 @@ static int dtl_file_release(struct inode *inode, struct file *filp)
 static ssize_t dtl_file_read(struct file *filp, char __user *buf, size_t len,
 		loff_t *pos)
 {
-	int rc, cur_idx, last_idx, n_read, n_req, read_size;
+	long int rc, n_read, n_req, read_size;
 	struct dtl *dtl;
+	u64 cur_idx, last_idx, i;
 
 	if ((len % sizeof(struct dtl_entry)) != 0)
 		return -EINVAL;
@@ -171,41 +277,48 @@ static ssize_t dtl_file_read(struct file *filp, char __user *buf, size_t len,
 	/* actual number of entries read */
 	n_read = 0;
 
-	cur_idx = lppaca[dtl->cpu].dtl_idx;
+	spin_lock(&dtl->lock);
+
+	cur_idx = dtl_current_index(dtl);
 	last_idx = dtl->last_idx;
 
-	if (cur_idx - last_idx > dtl->buf_entries) {
-		pr_debug("%s: hv buffer overflow for cpu %d, samples lost\n",
-				__func__, dtl->cpu);
-	}
+	if (last_idx + dtl->buf_entries <= cur_idx)
+		last_idx = cur_idx - dtl->buf_entries + 1;
+
+	if (last_idx + n_req > cur_idx)
+		n_req = cur_idx - last_idx;
+
+	if (n_req > 0)
+		dtl->last_idx = last_idx + n_req;
+
+	spin_unlock(&dtl->lock);
+
+	if (n_req <= 0)
+		return 0;
 
-	cur_idx  %= dtl->buf_entries;
-	last_idx %= dtl->buf_entries;
+	i = last_idx % dtl->buf_entries;
 
 	/* read the tail of the buffer if we've wrapped */
-	if (last_idx > cur_idx) {
-		read_size = min(n_req, dtl->buf_entries - last_idx);
+	if (i + n_req > dtl->buf_entries) {
+		read_size = dtl->buf_entries - i;
 
-		rc = copy_to_user(buf, &dtl->buf[last_idx],
+		rc = copy_to_user(buf, &dtl->buf[i],
 				read_size * sizeof(struct dtl_entry));
 		if (rc)
 			return -EFAULT;
 
-		last_idx = 0;
+		i = 0;
 		n_req -= read_size;
 		n_read += read_size;
 		buf += read_size * sizeof(struct dtl_entry);
 	}
 
 	/* .. and now the head */
-	read_size = min(n_req, cur_idx - last_idx);
-	rc = copy_to_user(buf, &dtl->buf[last_idx],
-			read_size * sizeof(struct dtl_entry));
+	rc = copy_to_user(buf, &dtl->buf[i], n_req * sizeof(struct dtl_entry));
 	if (rc)
 		return -EFAULT;
 
-	n_read += read_size;
-	dtl->last_idx += n_read;
+	n_read += n_req;
 
 	return n_read * sizeof(struct dtl_entry);
 }
@@ -263,6 +376,7 @@ static int dtl_init(void)
 	/* set up the per-cpu log structures */
 	for_each_possible_cpu(i) {
 		struct dtl *dtl = &per_cpu(cpu_dtl, i);
+		spin_lock_init(&dtl->lock);
 		dtl->cpu = i;
 
 		rc = dtl_setup_file(dtl);
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index cf79b46d8f8..f129040d974 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -248,11 +248,13 @@ void vpa_init(int cpu)
 	int hwcpu = get_hard_smp_processor_id(cpu);
 	unsigned long addr;
 	long ret;
+	struct paca_struct *pp;
+	struct dtl_entry *dtl;
 
 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
-		lppaca[cpu].vmxregs_in_use = 1;
+		lppaca_of(cpu).vmxregs_in_use = 1;
 
-	addr = __pa(&lppaca[cpu]);
+	addr = __pa(&lppaca_of(cpu));
 	ret = register_vpa(hwcpu, addr);
 
 	if (ret) {
@@ -274,6 +276,25 @@ void vpa_init(int cpu)
 			       "registration for cpu %d (hw %d) of area %lx "
 			       "returns %ld\n", cpu, hwcpu, addr, ret);
 	}
+
+	/*
+	 * Register dispatch trace log, if one has been allocated.
+	 */
+	pp = &paca[cpu];
+	dtl = pp->dispatch_log;
+	if (dtl) {
+		pp->dtl_ridx = 0;
+		pp->dtl_curr = dtl;
+		lppaca_of(cpu).dtl_idx = 0;
+
+		/* hypervisor reads buffer length from this field */
+		dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
+		ret = register_dtl(hwcpu, __pa(dtl));
+		if (ret)
+			pr_warn("DTL registration failed for cpu %d (%ld)\n",
+				cpu, ret);
+		lppaca_of(cpu).dtl_enable_mask = 2;
+	}
 }
 
 static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
new file mode 100644
index 00000000000..3e7f651e50a
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -0,0 +1,362 @@
+/*
+ * Support for Partition Mobility/Migration
+ *
+ * Copyright (C) 2010 Nathan Fontenot
+ * Copyright (C) 2010 IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/smp.h>
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <asm/rtas.h>
+#include "pseries.h"
+
+static struct kobject *mobility_kobj;
+
+struct update_props_workarea {
+	u32 phandle;
+	u32 state;
+	u64 reserved;
+	u32 nprops;
+};
+
+#define NODE_ACTION_MASK	0xff000000
+#define NODE_COUNT_MASK		0x00ffffff
+
+#define DELETE_DT_NODE	0x01000000
+#define UPDATE_DT_NODE	0x02000000
+#define ADD_DT_NODE	0x03000000
+
+static int mobility_rtas_call(int token, char *buf)
+{
+	int rc;
+
+	spin_lock(&rtas_data_buf_lock);
+
+	memcpy(rtas_data_buf, buf, RTAS_DATA_BUF_SIZE);
+	rc = rtas_call(token, 2, 1, NULL, rtas_data_buf, 1);
+	memcpy(buf, rtas_data_buf, RTAS_DATA_BUF_SIZE);
+
+	spin_unlock(&rtas_data_buf_lock);
+	return rc;
+}
+
+static int delete_dt_node(u32 phandle)
+{
+	struct device_node *dn;
+
+	dn = of_find_node_by_phandle(phandle);
+	if (!dn)
+		return -ENOENT;
+
+	dlpar_detach_node(dn);
+	return 0;
+}
+
+static int update_dt_property(struct device_node *dn, struct property **prop,
+			      const char *name, u32 vd, char *value)
+{
+	struct property *new_prop = *prop;
+	struct property *old_prop;
+	int more = 0;
+
+	/* A negative 'vd' value indicates that only part of the new property
+	 * value is contained in the buffer and we need to call
+	 * ibm,update-properties again to get the rest of the value.
+	 *
+	 * A negative value is also the two's compliment of the actual value.
+	 */
+	if (vd & 0x80000000) {
+		vd = ~vd + 1;
+		more = 1;
+	}
+
+	if (new_prop) {
+		/* partial property fixup */
+		char *new_data = kzalloc(new_prop->length + vd, GFP_KERNEL);
+		if (!new_data)
+			return -ENOMEM;
+
+		memcpy(new_data, new_prop->value, new_prop->length);
+		memcpy(new_data + new_prop->length, value, vd);
+
+		kfree(new_prop->value);
+		new_prop->value = new_data;
+		new_prop->length += vd;
+	} else {
+		new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
+		if (!new_prop)
+			return -ENOMEM;
+
+		new_prop->name = kstrdup(name, GFP_KERNEL);
+		if (!new_prop->name) {
+			kfree(new_prop);
+			return -ENOMEM;
+		}
+
+		new_prop->length = vd;
+		new_prop->value = kzalloc(new_prop->length, GFP_KERNEL);
+		if (!new_prop->value) {
+			kfree(new_prop->name);
+			kfree(new_prop);
+			return -ENOMEM;
+		}
+
+		memcpy(new_prop->value, value, vd);
+		*prop = new_prop;
+	}
+
+	if (!more) {
+		old_prop = of_find_property(dn, new_prop->name, NULL);
+		if (old_prop)
+			prom_update_property(dn, new_prop, old_prop);
+		else
+			prom_add_property(dn, new_prop);
+
+		new_prop = NULL;
+	}
+
+	return 0;
+}
+
+static int update_dt_node(u32 phandle)
+{
+	struct update_props_workarea *upwa;
+	struct device_node *dn;
+	struct property *prop = NULL;
+	int i, rc;
+	char *prop_data;
+	char *rtas_buf;
+	int update_properties_token;
+
+	update_properties_token = rtas_token("ibm,update-properties");
+	if (update_properties_token == RTAS_UNKNOWN_SERVICE)
+		return -EINVAL;
+
+	rtas_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
+	if (!rtas_buf)
+		return -ENOMEM;
+
+	dn = of_find_node_by_phandle(phandle);
+	if (!dn) {
+		kfree(rtas_buf);
+		return -ENOENT;
+	}
+
+	upwa = (struct update_props_workarea *)&rtas_buf[0];
+	upwa->phandle = phandle;
+
+	do {
+		rc = mobility_rtas_call(update_properties_token, rtas_buf);
+		if (rc < 0)
+			break;
+
+		prop_data = rtas_buf + sizeof(*upwa);
+
+		for (i = 0; i < upwa->nprops; i++) {
+			char *prop_name;
+			u32 vd;
+
+			prop_name = prop_data + 1;
+			prop_data += strlen(prop_name) + 1;
+			vd = *prop_data++;
+
+			switch (vd) {
+			case 0x00000000:
+				/* name only property, nothing to do */
+				break;
+
+			case 0x80000000:
+				prop = of_find_property(dn, prop_name, NULL);
+				prom_remove_property(dn, prop);
+				prop = NULL;
+				break;
+
+			default:
+				rc = update_dt_property(dn, &prop, prop_name,
+							vd, prop_data);
+				if (rc) {
+					printk(KERN_ERR "Could not update %s"
+					       " property\n", prop_name);
+				}
+
+				prop_data += vd;
+			}
+		}
+	} while (rc == 1);
+
+	of_node_put(dn);
+	kfree(rtas_buf);
+	return 0;
+}
+
+static int add_dt_node(u32 parent_phandle, u32 drc_index)
+{
+	struct device_node *dn;
+	struct device_node *parent_dn;
+	int rc;
+
+	dn = dlpar_configure_connector(drc_index);
+	if (!dn)
+		return -ENOENT;
+
+	parent_dn = of_find_node_by_phandle(parent_phandle);
+	if (!parent_dn) {
+		dlpar_free_cc_nodes(dn);
+		return -ENOENT;
+	}
+
+	dn->parent = parent_dn;
+	rc = dlpar_attach_node(dn);
+	if (rc)
+		dlpar_free_cc_nodes(dn);
+
+	of_node_put(parent_dn);
+	return rc;
+}
+
+static int pseries_devicetree_update(void)
+{
+	char *rtas_buf;
+	u32 *data;
+	int update_nodes_token;
+	int rc;
+
+	update_nodes_token = rtas_token("ibm,update-nodes");
+	if (update_nodes_token == RTAS_UNKNOWN_SERVICE)
+		return -EINVAL;
+
+	rtas_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
+	if (!rtas_buf)
+		return -ENOMEM;
+
+	do {
+		rc = mobility_rtas_call(update_nodes_token, rtas_buf);
+		if (rc && rc != 1)
+			break;
+
+		data = (u32 *)rtas_buf + 4;
+		while (*data & NODE_ACTION_MASK) {
+			int i;
+			u32 action = *data & NODE_ACTION_MASK;
+			int node_count = *data & NODE_COUNT_MASK;
+
+			data++;
+
+			for (i = 0; i < node_count; i++) {
+				u32 phandle = *data++;
+				u32 drc_index;
+
+				switch (action) {
+				case DELETE_DT_NODE:
+					delete_dt_node(phandle);
+					break;
+				case UPDATE_DT_NODE:
+					update_dt_node(phandle);
+					break;
+				case ADD_DT_NODE:
+					drc_index = *data++;
+					add_dt_node(phandle, drc_index);
+					break;
+				}
+			}
+		}
+	} while (rc == 1);
+
+	kfree(rtas_buf);
+	return rc;
+}
+
+void post_mobility_fixup(void)
+{
+	int rc;
+	int activate_fw_token;
+
+	rc = pseries_devicetree_update();
+	if (rc) {
+		printk(KERN_ERR "Initial post-mobility device tree update "
+		       "failed: %d\n", rc);
+		return;
+	}
+
+	activate_fw_token = rtas_token("ibm,activate-firmware");
+	if (activate_fw_token == RTAS_UNKNOWN_SERVICE) {
+		printk(KERN_ERR "Could not make post-mobility "
+		       "activate-fw call.\n");
+		return;
+	}
+
+	rc = rtas_call(activate_fw_token, 0, 1, NULL);
+	if (!rc) {
+		rc = pseries_devicetree_update();
+		if (rc)
+			printk(KERN_ERR "Secondary post-mobility device tree "
+			       "update failed: %d\n", rc);
+	} else {
+		printk(KERN_ERR "Post-mobility activate-fw failed: %d\n", rc);
+		return;
+	}
+
+	return;
+}
+
+static ssize_t migrate_store(struct class *class, struct class_attribute *attr,
+			     const char *buf, size_t count)
+{
+	struct rtas_args args;
+	u64 streamid;
+	int rc;
+
+	rc = strict_strtoull(buf, 0, &streamid);
+	if (rc)
+		return rc;
+
+	memset(&args, 0, sizeof(args));
+	args.token = rtas_token("ibm,suspend-me");
+	args.nargs = 2;
+	args.nret = 1;
+
+	args.args[0] = streamid >> 32 ;
+	args.args[1] = streamid & 0xffffffff;
+	args.rets = &args.args[args.nargs];
+
+	do {
+		args.rets[0] = 0;
+		rc = rtas_ibm_suspend_me(&args);
+		if (!rc && args.rets[0] == RTAS_NOT_SUSPENDABLE)
+			ssleep(1);
+	} while (!rc && args.rets[0] == RTAS_NOT_SUSPENDABLE);
+
+	if (rc)
+		return rc;
+	else if (args.rets[0])
+		return args.rets[0];
+
+	post_mobility_fixup();
+	return count;
+}
+
+static CLASS_ATTR(migration, S_IWUSR, NULL, migrate_store);
+
+static int __init mobility_sysfs_init(void)
+{
+	int rc;
+
+	mobility_kobj = kobject_create_and_add("mobility", kernel_kobj);
+	if (!mobility_kobj)
+		return -ENOMEM;
+
+	rc = sysfs_create_file(mobility_kobj, &class_attr_migration.attr);
+
+	return rc;
+}
+device_initcall(mobility_sysfs_init);
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 40c93cad91d..e9f6d2859c3 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -17,6 +17,8 @@ struct device_node;
 extern void request_event_sources_irqs(struct device_node *np,
 				       irq_handler_t handler, const char *name);
 
+#include <linux/of.h>
+
 extern void __init fw_feature_init(const char *hypertas, unsigned long len);
 
 struct pt_regs;
@@ -47,4 +49,11 @@ extern unsigned long rtas_poweron_auto;
 
 extern void find_udbg_vterm(void);
 
+/* Dynamic logical Partitioning/Mobility */
+extern void dlpar_free_cc_nodes(struct device_node *);
+extern void dlpar_free_cc_property(struct property *);
+extern struct device_node *dlpar_configure_connector(u32);
+extern int dlpar_attach_node(struct device_node *);
+extern int dlpar_detach_node(struct device_node *);
+
 #endif /* _PSERIES_PSERIES_H */
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index 57ddbb43b33..1de2cbb9230 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -539,7 +539,8 @@ out:
 }
 
 static const struct file_operations ofdt_fops = {
-	.write = ofdt_write
+	.write = ofdt_write,
+	.llseek = noop_llseek,
 };
 
 /* create /proc/powerpc/ofdt write-only by root */
diff --git a/arch/powerpc/platforms/pseries/scanlog.c b/arch/powerpc/platforms/pseries/scanlog.c
index 80e9e7652a4..554457294a2 100644
--- a/arch/powerpc/platforms/pseries/scanlog.c
+++ b/arch/powerpc/platforms/pseries/scanlog.c
@@ -170,6 +170,7 @@ const struct file_operations scanlog_fops = {
 	.write		= scanlog_write,
 	.open		= scanlog_open,
 	.release	= scanlog_release,
+	.llseek		= noop_llseek,
 };
 
 static int __init scanlog_init(void)
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index a6d19e3a505..d345bfd56bb 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -273,6 +273,58 @@ static struct notifier_block pci_dn_reconfig_nb = {
 	.notifier_call = pci_dn_reconfig_notifier,
 };
 
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+/*
+ * Allocate space for the dispatch trace log for all possible cpus
+ * and register the buffers with the hypervisor.  This is used for
+ * computing time stolen by the hypervisor.
+ */
+static int alloc_dispatch_logs(void)
+{
+	int cpu, ret;
+	struct paca_struct *pp;
+	struct dtl_entry *dtl;
+
+	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
+		return 0;
+
+	for_each_possible_cpu(cpu) {
+		pp = &paca[cpu];
+		dtl = kmalloc_node(DISPATCH_LOG_BYTES, GFP_KERNEL,
+				   cpu_to_node(cpu));
+		if (!dtl) {
+			pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
+				cpu);
+			pr_warn("Stolen time statistics will be unreliable\n");
+			break;
+		}
+
+		pp->dtl_ridx = 0;
+		pp->dispatch_log = dtl;
+		pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
+		pp->dtl_curr = dtl;
+	}
+
+	/* Register the DTL for the current (boot) cpu */
+	dtl = get_paca()->dispatch_log;
+	get_paca()->dtl_ridx = 0;
+	get_paca()->dtl_curr = dtl;
+	get_paca()->lppaca_ptr->dtl_idx = 0;
+
+	/* hypervisor reads buffer length from this field */
+	dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
+	ret = register_dtl(hard_smp_processor_id(), __pa(dtl));
+	if (ret)
+		pr_warn("DTL registration failed for boot cpu %d (%d)\n",
+			smp_processor_id(), ret);
+	get_paca()->lppaca_ptr->dtl_enable_mask = 2;
+
+	return 0;
+}
+
+early_initcall(alloc_dispatch_logs);
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
+
 static void __init pSeries_setup_arch(void)
 {
 	/* Discover PIC type and setup ppc_md accordingly */
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 93834b0d827..7b96e5a270c 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -178,7 +178,7 @@ static int get_irq_server(unsigned int virq, const struct cpumask *cpumask,
 	if (!distribute_irqs)
 		return default_server;
 
-	if (!cpumask_equal(cpumask, cpu_all_mask)) {
+	if (!cpumask_subset(cpu_possible_mask, cpumask)) {
 		int server = cpumask_first_and(cpu_online_mask, cpumask);
 
 		if (server < nr_cpu_ids)
@@ -243,7 +243,7 @@ static unsigned int xics_startup(unsigned int virq)
 	 * at that level, so we do it here by hand.
 	 */
 	if (irq_to_desc(virq)->msi_desc)
-		unmask_msi_irq(virq);
+		unmask_msi_irq(irq_get_irq_data(virq));
 
 	/* unmask it */
 	xics_unmask_irq(virq);