Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] cell: fix bugs found by sparse
  [POWERPC] spiderpic: enable new style devtree support
  [POWERPC] Update cell_defconfig
  [POWERPC] spufs: add infrastructure for finding elf objects
  [POWERPC] spufs: support new OF device tree format
  [POWERPC] spufs: add support for read/write on cntl
  [POWERPC] spufs: remove support for ancient firmware
  [POWERPC] spufs: make mailbox functions handle multiple elements
  [POWERPC] spufs: use correct pg_prot for mapping SPU local store
  [POWERPC] spufs: Add infrastructure needed for gang scheduling
  [POWERPC] spufs: implement error event delivery to user space
  [POWERPC] spufs: fix context switch during page fault
  [POWERPC] spufs: scheduler support for NUMA.
  [POWERPC] spufs: cell spu problem state mapping updates

17 files changed, 1017 insertions, 496 deletions

diff --git a/arch/powerpc/configs/cell_defconfig b/arch/powerpc/configs/cell_defconfig
index 6fd9e7a..892d5dd 100644
--- a/arch/powerpc/configs/cell_defconfig
+++ b/arch/powerpc/configs/cell_defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.18-rc6
-# Sun Sep 10 10:20:32 2006
+# Linux kernel version: 2.6.18
+# Wed Oct  4 15:30:50 2006
 #
 CONFIG_PPC64=y
 CONFIG_64BIT=y
@@ -22,6 +22,7 @@ CONFIG_ARCH_MAY_HAVE_PC_FDC=y
 CONFIG_PPC_OF=y
 CONFIG_PPC_UDBG_16550=y
 # CONFIG_GENERIC_TBSYNC is not set
+CONFIG_AUDIT_ARCH=y
 # CONFIG_DEFAULT_UIMAGE is not set
 
 #
@@ -52,10 +53,11 @@ CONFIG_LOCALVERSION=""
 CONFIG_LOCALVERSION_AUTO=y
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
+# CONFIG_IPC_NS is not set
 # CONFIG_POSIX_MQUEUE is not set
 # CONFIG_BSD_PROCESS_ACCT is not set
 # CONFIG_TASKSTATS is not set
-CONFIG_SYSCTL=y
+# CONFIG_UTS_NS is not set
 # CONFIG_AUDIT is not set
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
@@ -63,7 +65,9 @@ CONFIG_CPUSETS=y
 # CONFIG_RELAY is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL=y
 # CONFIG_EMBEDDED is not set
+# CONFIG_SYSCTL_SYSCALL is not set
 CONFIG_KALLSYMS=y
 # CONFIG_KALLSYMS_ALL is not set
 # CONFIG_KALLSYMS_EXTRA_PASS is not set
@@ -72,12 +76,12 @@ CONFIG_PRINTK=y
 CONFIG_BUG=y
 CONFIG_ELF_CORE=y
 CONFIG_BASE_FULL=y
-CONFIG_RT_MUTEXES=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SHMEM=y
 CONFIG_SLAB=y
 CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
@@ -96,6 +100,7 @@ CONFIG_STOP_MACHINE=y
 #
 # Block layer
 #
+CONFIG_BLOCK=y
 # CONFIG_BLK_DEV_IO_TRACE is not set
 
 #
@@ -115,12 +120,13 @@ CONFIG_DEFAULT_IOSCHED="anticipatory"
 # Platform support
 #
 CONFIG_PPC_MULTIPLATFORM=y
-# CONFIG_PPC_ISERIES is not set
 # CONFIG_EMBEDDED6xx is not set
 # CONFIG_APUS is not set
 # CONFIG_PPC_PSERIES is not set
+# CONFIG_PPC_ISERIES is not set
 # CONFIG_PPC_PMAC is not set
 # CONFIG_PPC_MAPLE is not set
+# CONFIG_PPC_PASEMI is not set
 CONFIG_PPC_CELL=y
 CONFIG_PPC_CELL_NATIVE=y
 CONFIG_PPC_IBM_CELL_BLADE=y
@@ -142,7 +148,6 @@ CONFIG_MMIO_NVRAM=y
 #
 CONFIG_SPU_FS=m
 CONFIG_SPU_BASE=y
-CONFIG_SPUFS_MMAP=y
 CONFIG_CBE_RAS=y
 
 #
@@ -158,7 +163,7 @@ CONFIG_PREEMPT_NONE=y
 CONFIG_PREEMPT_BKL=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
-CONFIG_FORCE_MAX_ZONEORDER=13
+CONFIG_FORCE_MAX_ZONEORDER=9
 # CONFIG_IOMMU_VMERGE is not set
 CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
 CONFIG_KEXEC=y
@@ -168,6 +173,7 @@ CONFIG_NUMA=y
 CONFIG_NODES_SHIFT=4
 CONFIG_ARCH_SELECT_MEMORY_MODEL=y
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ARCH_POPULATES_NODE_MAP=y
 CONFIG_SELECT_MEMORY_MODEL=y
 # CONFIG_FLATMEM_MANUAL is not set
 # CONFIG_DISCONTIGMEM_MANUAL is not set
@@ -178,12 +184,12 @@ CONFIG_HAVE_MEMORY_PRESENT=y
 # CONFIG_SPARSEMEM_STATIC is not set
 CONFIG_SPARSEMEM_EXTREME=y
 CONFIG_MEMORY_HOTPLUG=y
+CONFIG_MEMORY_HOTPLUG_SPARSE=y
 CONFIG_SPLIT_PTLOCK_CPUS=4
 CONFIG_MIGRATION=y
 CONFIG_RESOURCES_64BIT=y
-CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID=y
 CONFIG_ARCH_MEMORY_PROBE=y
-# CONFIG_PPC_64K_PAGES is not set
+CONFIG_PPC_64K_PAGES=y
 CONFIG_SCHED_SMT=y
 CONFIG_PROC_DEVICETREE=y
 # CONFIG_CMDLINE_BOOL is not set
@@ -201,6 +207,7 @@ CONFIG_GENERIC_ISA_DMA=y
 CONFIG_PCI=y
 CONFIG_PCI_DOMAINS=y
 CONFIG_PCIEPORTBUS=y
+# CONFIG_PCI_MULTITHREAD_PROBE is not set
 # CONFIG_PCI_DEBUG is not set
 
 #
@@ -228,6 +235,7 @@ CONFIG_PACKET=y
 CONFIG_UNIX=y
 CONFIG_XFRM=y
 # CONFIG_XFRM_USER is not set
+# CONFIG_XFRM_SUB_POLICY is not set
 # CONFIG_NET_KEY is not set
 CONFIG_INET=y
 CONFIG_IP_MULTICAST=y
@@ -249,7 +257,8 @@ CONFIG_INET_XFRM_MODE_TUNNEL=y
 CONFIG_INET_DIAG=y
 CONFIG_INET_TCP_DIAG=y
 # CONFIG_TCP_CONG_ADVANCED is not set
-CONFIG_TCP_CONG_BIC=y
+CONFIG_TCP_CONG_CUBIC=y
+CONFIG_DEFAULT_TCP_CONG="cubic"
 
 #
 # IP: Virtual Server Configuration
@@ -261,11 +270,15 @@ CONFIG_IPV6=y
 CONFIG_INET6_AH=m
 CONFIG_INET6_ESP=m
 CONFIG_INET6_IPCOMP=m
+# CONFIG_IPV6_MIP6 is not set
 CONFIG_INET6_XFRM_TUNNEL=m
 CONFIG_INET6_TUNNEL=m
 CONFIG_INET6_XFRM_MODE_TRANSPORT=y
 CONFIG_INET6_XFRM_MODE_TUNNEL=y
+# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
 CONFIG_IPV6_TUNNEL=m
+# CONFIG_IPV6_SUBTREES is not set
+# CONFIG_IPV6_MULTIPLE_TABLES is not set
 # CONFIG_NETWORK_SECMARK is not set
 CONFIG_NETFILTER=y
 # CONFIG_NETFILTER_DEBUG is not set
@@ -322,7 +335,6 @@ CONFIG_IP_NF_QUEUE=m
 # CONFIG_ATALK is not set
 # CONFIG_X25 is not set
 # CONFIG_LAPB is not set
-# CONFIG_NET_DIVERT is not set
 # CONFIG_ECONET is not set
 # CONFIG_WAN_ROUTER is not set
 
@@ -434,6 +446,7 @@ CONFIG_BLK_DEV_AEC62XX=y
 # CONFIG_BLK_DEV_CS5530 is not set
 # CONFIG_BLK_DEV_HPT34X is not set
 # CONFIG_BLK_DEV_HPT366 is not set
+# CONFIG_BLK_DEV_JMICRON is not set
 # CONFIG_BLK_DEV_SC1200 is not set
 # CONFIG_BLK_DEV_PIIX is not set
 # CONFIG_BLK_DEV_IT821X is not set
@@ -456,6 +469,12 @@ CONFIG_IDEDMA_AUTO=y
 #
 # CONFIG_RAID_ATTRS is not set
 # CONFIG_SCSI is not set
+# CONFIG_SCSI_NETLINK is not set
+
+#
+# Serial ATA (prod) and Parallel ATA (experimental) drivers
+#
+# CONFIG_ATA is not set
 
 #
 # Multi-device support (RAID and LVM)
@@ -470,6 +489,7 @@ CONFIG_MD_RAID1=m
 # CONFIG_MD_MULTIPATH is not set
 # CONFIG_MD_FAULTY is not set
 CONFIG_BLK_DEV_DM=m
+# CONFIG_DM_DEBUG is not set
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m
 CONFIG_DM_MIRROR=m
@@ -504,7 +524,7 @@ CONFIG_NETDEVICES=y
 # CONFIG_DUMMY is not set
 CONFIG_BONDING=y
 # CONFIG_EQUALIZER is not set
-# CONFIG_TUN is not set
+CONFIG_TUN=y
 
 #
 # ARCnet devices
@@ -552,7 +572,7 @@ CONFIG_SKGE=m
 # CONFIG_TIGON3 is not set
 # CONFIG_BNX2 is not set
 CONFIG_SPIDER_NET=m
-# CONFIG_MV643XX_ETH is not set
+# CONFIG_QLA3XXX is not set
 
 #
 # Ethernet (10000 Mbit)
@@ -599,6 +619,7 @@ CONFIG_SPIDER_NET=m
 # Input device support
 #
 CONFIG_INPUT=y
+# CONFIG_INPUT_FF_MEMLESS is not set
 
 #
 # Userland interfaces
@@ -865,6 +886,7 @@ CONFIG_INFINIBAND_USER_ACCESS=m
 CONFIG_INFINIBAND_ADDR_TRANS=y
 CONFIG_INFINIBAND_MTHCA=m
 CONFIG_INFINIBAND_MTHCA_DEBUG=y
+# CONFIG_INFINIBAND_AMSO1100 is not set
 CONFIG_INFINIBAND_IPOIB=m
 CONFIG_INFINIBAND_IPOIB_DEBUG=y
 CONFIG_INFINIBAND_IPOIB_DEBUG_DATA=y
@@ -916,7 +938,7 @@ CONFIG_INOTIFY_USER=y
 # CONFIG_QUOTA is not set
 CONFIG_DNOTIFY=y
 # CONFIG_AUTOFS_FS is not set
-# CONFIG_AUTOFS4_FS is not set
+CONFIG_AUTOFS4_FS=m
 # CONFIG_FUSE_FS is not set
 
 #
@@ -943,8 +965,10 @@ CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
 #
 CONFIG_PROC_FS=y
 CONFIG_PROC_KCORE=y
+CONFIG_PROC_SYSCTL=y
 CONFIG_SYSFS=y
 CONFIG_TMPFS=y
+# CONFIG_TMPFS_POSIX_ACL is not set
 CONFIG_HUGETLBFS=y
 CONFIG_HUGETLB_PAGE=y
 CONFIG_RAMFS=y
@@ -1084,6 +1108,7 @@ CONFIG_PLIST=y
 # Kernel hacking
 #
 # CONFIG_PRINTK_TIME is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
 CONFIG_MAGIC_SYSRQ=y
 # CONFIG_UNUSED_SYMBOLS is not set
 CONFIG_DEBUG_KERNEL=y
@@ -1102,6 +1127,7 @@ CONFIG_DEBUG_SPINLOCK_SLEEP=y
 # CONFIG_DEBUG_INFO is not set
 CONFIG_DEBUG_FS=y
 # CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_LIST is not set
 # CONFIG_FORCED_INLINING is not set
 # CONFIG_RCU_TORTURE_TEST is not set
 # CONFIG_DEBUG_STACKOVERFLOW is not set
@@ -1123,6 +1149,10 @@ CONFIG_IRQSTACKS=y
 # Cryptographic options
 #
 CONFIG_CRYPTO=y
+CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_BLKCIPHER=m
+CONFIG_CRYPTO_HASH=y
+# CONFIG_CRYPTO_MANAGER is not set
 CONFIG_CRYPTO_HMAC=y
 # CONFIG_CRYPTO_NULL is not set
 # CONFIG_CRYPTO_MD4 is not set
@@ -1132,6 +1162,8 @@ CONFIG_CRYPTO_SHA1=m
 # CONFIG_CRYPTO_SHA512 is not set
 # CONFIG_CRYPTO_WP512 is not set
 # CONFIG_CRYPTO_TGR192 is not set
+CONFIG_CRYPTO_ECB=m
+CONFIG_CRYPTO_CBC=m
 CONFIG_CRYPTO_DES=m
 # CONFIG_CRYPTO_BLOWFISH is not set
 # CONFIG_CRYPTO_TWOFISH is not set
diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index 0c8c7b6..3e430b4 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -16,11 +16,6 @@ config SPU_BASE
 	bool
 	default n
 
-config SPUFS_MMAP
-	bool
-	depends on SPU_FS && SPARSEMEM
-	default y
-
 config CBE_RAS
 	bool "RAS features for bare metal Cell BE"
 	default y
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
index 6cc59e0..8533f13 100644
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -101,7 +101,7 @@ static void iic_ioexc_eoi(unsigned int irq)
 static void iic_ioexc_cascade(unsigned int irq, struct irq_desc *desc,
 			    struct pt_regs *regs)
 {
-	struct cbe_iic_regs *node_iic = desc->handler_data;
+	struct cbe_iic_regs __iomem *node_iic = (void __iomem *)desc->handler_data;
 	unsigned int base = (irq & 0xffffff00) | IIC_IRQ_TYPE_IOEXC;
 	unsigned long bits, ack;
 	int cascade;
@@ -320,7 +320,7 @@ static int __init setup_iic(void)
 	struct device_node *dn;
 	struct resource r0, r1;
 	unsigned int node, cascade, found = 0;
-	struct cbe_iic_regs *node_iic;
+	struct cbe_iic_regs __iomem *node_iic;
 	const u32 *np;
 
 	for (dn = NULL;
@@ -357,7 +357,11 @@ static int __init setup_iic(void)
 		cascade = irq_create_mapping(iic_host, cascade);
 		if (cascade == NO_IRQ)
 			continue;
-		set_irq_data(cascade, node_iic);
+		/*
+		 * irq_data is a generic pointer that gets passed back
+		 * to us later, so the forced cast is fine.
+		 */
+		set_irq_data(cascade, (void __force *)node_iic);
 		set_irq_chained_handler(cascade , iic_ioexc_cascade);
 		out_be64(&node_iic->iic_ir,
 			 (1 << 12)		/* priority */ |
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index d2b20eb..aca4c3d 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -345,8 +345,8 @@ static int cell_map_iommu_hardcoded(int num_nodes)
 
 	/* node 0 */
 	iommu = &cell_iommus[0];
-	iommu->mapped_base = ioremap(0x20000511000, 0x1000);
-	iommu->mapped_mmio_base = ioremap(0x20000510000, 0x1000);
+	iommu->mapped_base = ioremap(0x20000511000ul, 0x1000);
+	iommu->mapped_mmio_base = ioremap(0x20000510000ul, 0x1000);
 
 	enable_mapping(iommu->mapped_base, iommu->mapped_mmio_base);
 
@@ -358,8 +358,8 @@ static int cell_map_iommu_hardcoded(int num_nodes)
 
 	/* node 1 */
 	iommu = &cell_iommus[1];
-	iommu->mapped_base = ioremap(0x30000511000, 0x1000);
-	iommu->mapped_mmio_base = ioremap(0x30000510000, 0x1000);
+	iommu->mapped_base = ioremap(0x30000511000ul, 0x1000);
+	iommu->mapped_mmio_base = ioremap(0x30000510000ul, 0x1000);
 
 	enable_mapping(iommu->mapped_base, iommu->mapped_mmio_base);
 
diff --git a/arch/powerpc/platforms/cell/spider-pic.c b/arch/powerpc/platforms/cell/spider-pic.c
index 608b1eb..b0e95d5 100644
--- a/arch/powerpc/platforms/cell/spider-pic.c
+++ b/arch/powerpc/platforms/cell/spider-pic.c
@@ -244,7 +244,6 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
 	int imaplen, intsize, unit;
 	struct device_node *iic;
 
-#if 0 /* Enable that when we have a way to retreive the node as well */
 	/* First, we check wether we have a real "interrupts" in the device
 	 * tree in case the device-tree is ever fixed
 	 */
@@ -252,9 +251,8 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
 	if (of_irq_map_one(pic->of_node, 0, &oirq) == 0) {
 		virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
 					     oirq.size);
-		goto bail;
+		return virq;
 	}
-#endif
 
 	/* Now do the horrible hacks */
 	tmp = get_property(pic->of_node, "#interrupt-cells", NULL);
@@ -369,7 +367,7 @@ void __init spider_init_IRQ(void)
 		} else if (device_is_compatible(dn, "sti,platform-spider-pic")
 			   && (chip < 2)) {
 			static long hard_coded_pics[] =
-				{ 0x24000008000, 0x34000008000 };
+				{ 0x24000008000ul, 0x34000008000ul};
 			r.start = hard_coded_pics[chip];
 		} else
 			continue;
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index f786803..ac5f1266 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -25,11 +25,13 @@
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/module.h>
+#include <linux/pci.h>
 #include <linux/poll.h>
 #include <linux/ptrace.h>
 #include <linux/slab.h>
 #include <linux/wait.h>
 
+#include <asm/firmware.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <linux/mutex.h>
@@ -46,21 +48,21 @@ EXPORT_SYMBOL_GPL(spu_priv1_ops);
 static int __spu_trap_invalid_dma(struct spu *spu)
 {
 	pr_debug("%s\n", __FUNCTION__);
-	force_sig(SIGBUS, /* info, */ current);
+	spu->dma_callback(spu, SPE_EVENT_INVALID_DMA);
 	return 0;
 }
 
 static int __spu_trap_dma_align(struct spu *spu)
 {
 	pr_debug("%s\n", __FUNCTION__);
-	force_sig(SIGBUS, /* info, */ current);
+	spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT);
 	return 0;
 }
 
 static int __spu_trap_error(struct spu *spu)
 {
 	pr_debug("%s\n", __FUNCTION__);
-	force_sig(SIGILL, /* info, */ current);
+	spu->dma_callback(spu, SPE_EVENT_SPE_ERROR);
 	return 0;
 }
 
@@ -317,7 +319,7 @@ static void spu_free_irqs(struct spu *spu)
 		free_irq(spu->irqs[2], spu);
 }
 
-static LIST_HEAD(spu_list);
+static struct list_head spu_list[MAX_NUMNODES];
 static DEFINE_MUTEX(spu_mutex);
 
 static void spu_init_channels(struct spu *spu)
@@ -354,32 +356,42 @@ static void spu_init_channels(struct spu *spu)
 	}
 }
 
-struct spu *spu_alloc(void)
+struct spu *spu_alloc_node(int node)
 {
-	struct spu *spu;
+	struct spu *spu = NULL;
 
 	mutex_lock(&spu_mutex);
-	if (!list_empty(&spu_list)) {
-		spu = list_entry(spu_list.next, struct spu, list);
+	if (!list_empty(&spu_list[node])) {
+		spu = list_entry(spu_list[node].next, struct spu, list);
 		list_del_init(&spu->list);
-		pr_debug("Got SPU %x %d\n", spu->isrc, spu->number);
-	} else {
-		pr_debug("No SPU left\n");
-		spu = NULL;
+		pr_debug("Got SPU %x %d %d\n",
+			 spu->isrc, spu->number, spu->node);
+		spu_init_channels(spu);
 	}
 	mutex_unlock(&spu_mutex);
 
-	if (spu)
-		spu_init_channels(spu);
+	return spu;
+}
+EXPORT_SYMBOL_GPL(spu_alloc_node);
+
+struct spu *spu_alloc(void)
+{
+	struct spu *spu = NULL;
+	int node;
+
+	for (node = 0; node < MAX_NUMNODES; node++) {
+		spu = spu_alloc_node(node);
+		if (spu)
+			break;
+	}
 
 	return spu;
 }
-EXPORT_SYMBOL_GPL(spu_alloc);
 
 void spu_free(struct spu *spu)
 {
 	mutex_lock(&spu_mutex);
-	list_add_tail(&spu->list, &spu_list);
+	list_add_tail(&spu->list, &spu_list[spu->node]);
 	mutex_unlock(&spu_mutex);
 }
 EXPORT_SYMBOL_GPL(spu_free);
@@ -566,7 +578,7 @@ static void spu_unmap(struct spu *spu)
 }
 
 /* This function shall be abstracted for HV platforms */
-static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
+static int __init spu_map_interrupts_old(struct spu *spu, struct device_node *np)
 {
 	unsigned int isrc;
 	const u32 *tmp;
@@ -590,7 +602,7 @@ static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
 	return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
 }
 
-static int __init spu_map_device(struct spu *spu, struct device_node *node)
+static int __init spu_map_device_old(struct spu *spu, struct device_node *node)
 {
 	const char *prop;
 	int ret;
@@ -635,6 +647,88 @@ out:
 	return ret;
 }
 
+static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
+{
+	struct of_irq oirq;
+	int ret;
+	int i;
+
+	for (i=0; i < 3; i++) {
+		ret = of_irq_map_one(np, i, &oirq);
+		if (ret)
+			goto err;
+
+		ret = -EINVAL;
+		spu->irqs[i] = irq_create_of_mapping(oirq.controller,
+					oirq.specifier, oirq.size);
+		if (spu->irqs[i] == NO_IRQ)
+			goto err;
+	}
+	return 0;
+
+err:
+	pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier, spu->name);
+	for (; i >= 0; i--) {
+		if (spu->irqs[i] != NO_IRQ)
+			irq_dispose_mapping(spu->irqs[i]);
+	}
+	return ret;
+}
+
+static int spu_map_resource(struct device_node *node, int nr,
+		void __iomem** virt, unsigned long *phys)
+{
+	struct resource resource = { };
+	int ret;
+
+	ret = of_address_to_resource(node, 0, &resource);
+	if (ret)
+		goto out;
+
+	if (phys)
+		*phys = resource.start;
+	*virt = ioremap(resource.start, resource.end - resource.start);
+	if (!*virt)
+		ret = -EINVAL;
+
+out:
+	return ret;
+}
+
+static int __init spu_map_device(struct spu *spu, struct device_node *node)
+{
+	int ret = -ENODEV;
+	spu->name = get_property(node, "name", NULL);
+	if (!spu->name)
+		goto out;
+
+	ret = spu_map_resource(node, 0, (void __iomem**)&spu->local_store,
+					&spu->local_store_phys);
+	if (ret)
+		goto out;
+	ret = spu_map_resource(node, 1, (void __iomem**)&spu->problem,
+					&spu->problem_phys);
+	if (ret)
+		goto out_unmap;
+	ret = spu_map_resource(node, 2, (void __iomem**)&spu->priv2,
+					NULL);
+	if (ret)
+		goto out_unmap;
+
+	if (!firmware_has_feature(FW_FEATURE_LPAR))
+		ret = spu_map_resource(node, 3, (void __iomem**)&spu->priv1,
+					NULL);
+	if (ret)
+		goto out_unmap;
+	return 0;
+
+out_unmap:
+	spu_unmap(spu);
+out:
+	pr_debug("failed to map spe %s: %d\n", spu->name, ret);
+	return ret;
+}
+
 struct sysdev_class spu_sysdev_class = {
 	set_kset_name("spu")
 };
@@ -688,6 +782,9 @@ static int __init create_spu(struct device_node *spe)
 		goto out;
 
 	ret = spu_map_device(spu, spe);
+	/* try old method */
+	if (ret)
+		ret = spu_map_device_old(spu, spe);
 	if (ret)
 		goto out_free;
 
@@ -697,6 +794,8 @@ static int __init create_spu(struct device_node *spe)
 		spu->nid = 0;
 	ret = spu_map_interrupts(spu, spe);
 	if (ret)
+		ret = spu_map_interrupts_old(spu, spe);
+	if (ret)
 		goto out_unmap;
 	spin_lock_init(&spu->register_lock);
 	spu_mfc_sdr_set(spu, mfspr(SPRN_SDR1));
@@ -706,13 +805,13 @@ static int __init create_spu(struct device_node *spe)
 	spu->number = number++;
 	ret = spu_request_irqs(spu);
 	if (ret)
-		goto out_unmap;
+		goto out_unlock;
 
 	ret = spu_create_sysdev(spu);
 	if (ret)
 		goto out_free_irqs;
 
-	list_add(&spu->list, &spu_list);
+	list_add(&spu->list, &spu_list[spu->node]);
 	mutex_unlock(&spu_mutex);
 
 	pr_debug(KERN_DEBUG "Using SPE %s %02x %p %p %p %p %d\n",
@@ -722,9 +821,9 @@ static int __init create_spu(struct device_node *spe)
 
 out_free_irqs:
 	spu_free_irqs(spu);
-
-out_unmap:
+out_unlock:
 	mutex_unlock(&spu_mutex);
+out_unmap:
 	spu_unmap(spu);
 out_free:
 	kfree(spu);
@@ -745,9 +844,13 @@ static void destroy_spu(struct spu *spu)
 static void cleanup_spu_base(void)
 {
 	struct spu *spu, *tmp;
+	int node;
+
 	mutex_lock(&spu_mutex);
-	list_for_each_entry_safe(spu, tmp, &spu_list, list)
-		destroy_spu(spu);
+	for (node = 0; node < MAX_NUMNODES; node++) {
+		list_for_each_entry_safe(spu, tmp, &spu_list[node], list)
+			destroy_spu(spu);
+	}
 	mutex_unlock(&spu_mutex);
 	sysdev_class_unregister(&spu_sysdev_class);
 }
@@ -756,13 +859,16 @@ module_exit(cleanup_spu_base);
 static int __init init_spu_base(void)
 {
 	struct device_node *node;
-	int ret;
+	int i, ret;
 
 	/* create sysdev class for spus */
 	ret = sysdev_class_register(&spu_sysdev_class);
 	if (ret)
 		return ret;
 
+	for (i = 0; i < MAX_NUMNODES; i++)
+		INIT_LIST_HEAD(&spu_list[i]);
+
 	ret = -ENODEV;
 	for (node = of_find_node_by_type(NULL, "spe");
 			node; node = of_find_node_by_type(node, "spe")) {
@@ -774,18 +880,6 @@ static int __init init_spu_base(void)
 			break;
 		}
 	}
-	/* in some old firmware versions, the spe is called 'spc', so we
-	   look for that as well */
-	for (node = of_find_node_by_type(NULL, "spc");
-			node; node = of_find_node_by_type(node, "spc")) {
-		ret = create_spu(node);
-		if (ret) {
-			printk(KERN_WARNING "%s: Error initializing %s\n",
-				__FUNCTION__, node->name);
-			cleanup_spu_base();
-			break;
-		}
-	}
 	return ret;
 }
 module_init(init_spu_base);
diff --git a/arch/powerpc/platforms/cell/spufs/Makefile b/arch/powerpc/platforms/cell/spufs/Makefile
index bb5dc63..ecdfbb3 100644
--- a/arch/powerpc/platforms/cell/spufs/Makefile
+++ b/arch/powerpc/platforms/cell/spufs/Makefile
@@ -2,7 +2,7 @@ obj-y += switch.o
 
 obj-$(CONFIG_SPU_FS) += spufs.o
 spufs-y += inode.o file.o context.o syscalls.o
-spufs-y += sched.o backing_ops.o hw_ops.o run.o
+spufs-y += sched.o backing_ops.o hw_ops.o run.o gang.o
 
 # Rules to build switch.o with the help of SPU tool chain
 SPU_CROSS	:= spu-
diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c
index 36439c5..034cf6a 100644
--- a/arch/powerpc/platforms/cell/spufs/context.c
+++ b/arch/powerpc/platforms/cell/spufs/context.c
@@ -27,7 +27,7 @@
 #include <asm/spu_csa.h>
 #include "spufs.h"
 
-struct spu_context *alloc_spu_context(void)
+struct spu_context *alloc_spu_context(struct spu_gang *gang)
 {
 	struct spu_context *ctx;
 	ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
@@ -51,6 +51,8 @@ struct spu_context *alloc_spu_context(void)
 	ctx->state = SPU_STATE_SAVED;
 	ctx->ops = &spu_backing_ops;
 	ctx->owner = get_task_mm(current);
+	if (gang)
+		spu_gang_add_ctx(gang, ctx);
 	goto out;
 out_free:
 	kfree(ctx);
@@ -67,6 +69,8 @@ void destroy_spu_context(struct kref *kref)
 	spu_deactivate(ctx);
 	up_write(&ctx->state_sema);
 	spu_fini_csa(&ctx->csa);
+	if (ctx->gang)
+		spu_gang_remove_ctx(ctx->gang, ctx);
 	kfree(ctx);
 }
 
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 51fd197..e0d7300 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -36,6 +36,8 @@
 
 #include "spufs.h"
 
+#define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)
+
 
 static int
 spufs_mem_open(struct inode *inode, struct file *file)
@@ -88,7 +90,6 @@ spufs_mem_write(struct file *file, const char __user *buffer,
 	return ret;
 }
 
-#ifdef CONFIG_SPUFS_MMAP
 static struct page *
 spufs_mem_mmap_nopage(struct vm_area_struct *vma,
 		      unsigned long address, int *type)
@@ -101,12 +102,16 @@ spufs_mem_mmap_nopage(struct vm_area_struct *vma,
 
 	spu_acquire(ctx);
 
-	if (ctx->state == SPU_STATE_SAVED)
+	if (ctx->state == SPU_STATE_SAVED) {
+		vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+					& ~(_PAGE_NO_CACHE | _PAGE_GUARDED));
 		page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
-	else
+	} else {
+		vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+					| _PAGE_NO_CACHE | _PAGE_GUARDED);
 		page = pfn_to_page((ctx->spu->local_store_phys + offset)
 				   >> PAGE_SHIFT);
-
+	}
 	spu_release(ctx);
 
 	if (type)
@@ -133,22 +138,19 @@ spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_ops = &spufs_mem_mmap_vmops;
 	return 0;
 }
-#endif
 
 static struct file_operations spufs_mem_fops = {
 	.open	 = spufs_mem_open,
 	.read    = spufs_mem_read,
 	.write   = spufs_mem_write,
 	.llseek  = generic_file_llseek,
-#ifdef CONFIG_SPUFS_MMAP
 	.mmap    = spufs_mem_mmap,
-#endif
 };
 
-#ifdef CONFIG_SPUFS_MMAP
 static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
 				    unsigned long address,
-				    int *type, unsigned long ps_offs)
+				    int *type, unsigned long ps_offs,
+				    unsigned long ps_size)
 {
 	struct page *page = NOPAGE_SIGBUS;
 	int fault_type = VM_FAULT_SIGBUS;
@@ -158,7 +160,7 @@ static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
 	int ret;
 
 	offset += vma->vm_pgoff << PAGE_SHIFT;
-	if (offset >= 0x4000)
+	if (offset >= ps_size)
 		goto out;
 
 	ret = spu_acquire_runnable(ctx);
@@ -179,10 +181,11 @@ static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
 	return page;
 }
 
+#if SPUFS_MMAP_4K
 static struct page *spufs_cntl_mmap_nopage(struct vm_area_struct *vma,
 					   unsigned long address, int *type)
 {
-	return spufs_ps_nopage(vma, address, type, 0x4000);
+	return spufs_ps_nopage(vma, address, type, 0x4000, 0x1000);
 }
 
 static struct vm_operations_struct spufs_cntl_mmap_vmops = {
@@ -191,17 +194,12 @@ static struct vm_operations_struct spufs_cntl_mmap_vmops = {
 
 /*
  * mmap support for problem state control area [0x4000 - 0x4fff].
- * Mapping this area requires that the application have CAP_SYS_RAWIO,
- * as these registers require special care when read/writing.
  */
 static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	if (!(vma->vm_flags & VM_SHARED))
 		return -EINVAL;
 
-	if (!capable(CAP_SYS_RAWIO))
-		return -EPERM;
-
 	vma->vm_flags |= VM_RESERVED;
 	vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
 				     | _PAGE_NO_CACHE | _PAGE_GUARDED);
@@ -209,42 +207,48 @@ static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_ops = &spufs_cntl_mmap_vmops;
 	return 0;
 }
-#endif
+#else /* SPUFS_MMAP_4K */
+#define spufs_cntl_mmap NULL
+#endif /* !SPUFS_MMAP_4K */
 
-static int spufs_cntl_open(struct inode *inode, struct file *file)
+static u64 spufs_cntl_get(void *data)
 {
-	struct spufs_inode_info *i = SPUFS_I(inode);
-	struct spu_context *ctx = i->i_ctx;
+	struct spu_context *ctx = data;
+	u64 val;
 
-	file->private_data = ctx;
-	file->f_mapping = inode->i_mapping;
-	ctx->cntl = inode->i_mapping;
-	return 0;
+	spu_acquire(ctx);
+	val = ctx->ops->status_read(ctx);
+	spu_release(ctx);
+
+	return val;
 }
 
-static ssize_t
-spufs_cntl_read(struct file *file, char __user *buffer,
-		size_t size, loff_t *pos)
+static void spufs_cntl_set(void *data, u64 val)
 {
-	/* FIXME: read from spu status */
-	return -EINVAL;
+	struct spu_context *ctx = data;
+
+	spu_acquire(ctx);
+	ctx->ops->runcntl_write(ctx, val);
+	spu_release(ctx);
 }
 
-static ssize_t
-spufs_cntl_write(struct file *file, const char __user *buffer,
-		 size_t size, loff_t *pos)
+static int spufs_cntl_open(struct inode *inode, struct file *file)
 {
-	/* FIXME: write to runctl bit */
-	return -EINVAL;
+	struct spufs_inode_info *i = SPUFS_I(inode);
+	struct spu_context *ctx = i->i_ctx;
+
+	file->private_data = ctx;
+	file->f_mapping = inode->i_mapping;
+	ctx->cntl = inode->i_mapping;
+	return simple_attr_open(inode, file, spufs_cntl_get,
+					spufs_cntl_set, "0x%08lx");
 }
 
 static struct file_operations spufs_cntl_fops = {
 	.open = spufs_cntl_open,
-	.read = spufs_cntl_read,
-	.write = spufs_cntl_write,
-#ifdef CONFIG_SPUFS_MMAP
+	.read = simple_attr_read,
+	.write = simple_attr_write,
 	.mmap = spufs_cntl_mmap,
-#endif
 };
 
 static int
@@ -356,27 +360,54 @@ static int spufs_pipe_open(struct inode *inode, struct file *file)
 	return nonseekable_open(inode, file);
 }
 
+/*
+ * Read as many bytes from the mailbox as possible, until
+ * one of the conditions becomes true:
+ *
+ * - no more data available in the mailbox
+ * - end of the user provided buffer
+ * - end of the mapped area
+ */
 static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
 			size_t len, loff_t *pos)
 {
 	struct spu_context *ctx = file->private_data;
-	u32 mbox_data;
-	int ret;
+	u32 mbox_data, __user *udata;
+	ssize_t count;
 
 	if (len < 4)
 		return -EINVAL;
 
+	if (!access_ok(VERIFY_WRITE, buf, len))
+		return -EFAULT;
+
+	udata = (void __user *)buf;
+
 	spu_acquire(ctx);
-	ret = ctx->ops->mbox_read(ctx, &mbox_data);
+	for (count = 0; count <= len; count += 4, udata++) {
+		int ret;
+		ret = ctx->ops->mbox_read(ctx, &mbox_data);
+		if (ret == 0)
+			break;
+
+		/*
+		 * at the end of the mapped area, we can fault
+		 * but still need to return the data we have
+		 * read successfully so far.
+		 */
+		ret = __put_user(mbox_data, udata);
+		if (ret) {
+			if (!count)
+				count = -EFAULT;
+			break;
+		}
+	}
 	spu_release(ctx);
 
-	if (!ret)
-		return -EAGAIN;
-
-	if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
-		return -EFAULT;
+	if (!count)
+		count = -EAGAIN;
 
-	return 4;
+	return count;
 }
 
 static struct file_operations spufs_mbox_fops = {
@@ -432,36 +463,70 @@ void spufs_ibox_callback(struct spu *spu)
 	kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
 }
 
+/*
+ * Read as many bytes from the interrupt mailbox as possible, until
+ * one of the conditions becomes true:
+ *
+ * - no more data available in the mailbox
+ * - end of the user provided buffer
+ * - end of the mapped area
+ *
+ * If the file is opened without O_NONBLOCK, we wait here until
+ * any data is available, but return when we have been able to
+ * read something.
+ */
 static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
 			size_t len, loff_t *pos)
 {
 	struct spu_context *ctx = file->private_data;
-	u32 ibox_data;
-	ssize_t ret;
+	u32 ibox_data, __user *udata;
+	ssize_t count;
 
 	if (len < 4)
 		return -EINVAL;
 
+	if (!access_ok(VERIFY_WRITE, buf, len))
+		return -EFAULT;
+
+	udata = (void __user *)buf;
+
 	spu_acquire(ctx);
 
-	ret = 0;
+	/* wait only for the first element */
+	count = 0;
 	if (file->f_flags & O_NONBLOCK) {
 		if (!spu_ibox_read(ctx, &ibox_data))
-			ret = -EAGAIN;
+			count = -EAGAIN;
 	} else {
-		ret = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
+		count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
 	}
+	if (count)
+		goto out;
 
-	spu_release(ctx);
+	/* if we can't write at all, return -EFAULT */
+	count = __put_user(ibox_data, udata);
+	if (count)
+		goto out;
 
-	if (ret)
-		return ret;
+	for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
+		int ret;
+		ret = ctx->ops->ibox_read(ctx, &ibox_data);
+		if (ret == 0)
+			break;
+		/*
+		 * at the end of the mapped area, we can fault
+		 * but still need to return the data we have
+		 * read successfully so far.
+		 */
+		ret = __put_user(ibox_data, udata);
+		if (ret)
+			break;
+	}
 
-	ret = 4;
-	if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
-		ret = -EFAULT;
+out:
+	spu_release(ctx);
 
-	return ret;
+	return count;
 }
 
 static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
@@ -534,32 +599,67 @@ void spufs_wbox_callback(struct spu *spu)
 	kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
 }
 
+/*
+ * Write as many bytes to the interrupt mailbox as possible, until
+ * one of the conditions becomes true:
+ *
+ * - the mailbox is full
+ * - end of the user provided buffer
+ * - end of the mapped area
+ *
+ * If the file is opened without O_NONBLOCK, we wait here until
+ * space is availabyl, but return when we have been able to
+ * write something.
+ */
 static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
 			size_t len, loff_t *pos)
 {
 	struct spu_context *ctx = file->private_data;
-	u32 wbox_data;
-	int ret;
+	u32 wbox_data, __user *udata;
+	ssize_t count;
 
 	if (len < 4)
 		return -EINVAL;
 
-	if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
+	udata = (void __user *)buf;
+	if (!access_ok(VERIFY_READ, buf, len))
+		return -EFAULT;
+
+	if (__get_user(wbox_data, udata))
 		return -EFAULT;
 
 	spu_acquire(ctx);
 
-	ret = 0;
+	/*
+	 * make sure we can at least write one element, by waiting
+	 * in case of !O_NONBLOCK
+	 */
+	count = 0;
 	if (file->f_flags & O_NONBLOCK) {
 		if (!spu_wbox_write(ctx, wbox_data))
-			ret = -EAGAIN;
+			count = -EAGAIN;
 	} else {
-		ret = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
+		count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
 	}
 
-	spu_release(ctx);
+	if (count)
+		goto out;
+
+	/* write aѕ much as possible */
+	for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
+		int ret;
+		ret = __get_user(wbox_data, udata);
+		if (ret)
+			break;
+
+		ret = spu_wbox_write(ctx, wbox_data);
+		if (ret == 0)
+			break;
+	}
 
-	return ret ? ret : sizeof wbox_data;
+out:
+	spu_release(ctx);
+	return count;
 }
 
 static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
@@ -657,11 +757,19 @@ static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
 	return 4;
 }
 
-#ifdef CONFIG_SPUFS_MMAP
 static struct page *spufs_signal1_mmap_nopage(struct vm_area_struct *vma,
 					      unsigned long address, int *type)
 {
-	return spufs_ps_nopage(vma, address, type, 0x14000);
+#if PAGE_SIZE == 0x1000
+	return spufs_ps_nopage(vma, address, type, 0x14000, 0x1000);
+#elif PAGE_SIZE == 0x10000
+	/* For 64k pages, both signal1 and signal2 can be used to mmap the whole
+	 * signal 1 and 2 area
+	 */
+	return spufs_ps_nopage(vma, address, type, 0x10000, 0x10000);
+#else
+#error unsupported page size
+#endif
 }
 
 static struct vm_operations_struct spufs_signal1_mmap_vmops = {
@@ -680,15 +788,12 @@ static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_ops = &spufs_signal1_mmap_vmops;
 	return 0;
 }
-#endif
 
 static struct file_operations spufs_signal1_fops = {
 	.open = spufs_signal1_open,
 	.read = spufs_signal1_read,
 	.write = spufs_signal1_write,
-#ifdef CONFIG_SPUFS_MMAP
 	.mmap = spufs_signal1_mmap,
-#endif
 };
 
 static int spufs_signal2_open(struct inode *inode, struct file *file)
@@ -743,11 +848,20 @@ static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
 	return 4;
 }
 
-#ifdef CONFIG_SPUFS_MMAP
+#if SPUFS_MMAP_4K
 static struct page *spufs_signal2_mmap_nopage(struct vm_area_struct *vma,
 					      unsigned long address, int *type)
 {
-	return spufs_ps_nopage(vma, address, type, 0x1c000);
+#if PAGE_SIZE == 0x1000
+	return spufs_ps_nopage(vma, address, type, 0x1c000, 0x1000);
+#elif PAGE_SIZE == 0x10000
+	/* For 64k pages, both signal1 and signal2 can be used to mmap the whole
+	 * signal 1 and 2 area
+	 */
+	return spufs_ps_nopage(vma, address, type, 0x10000, 0x10000);
+#else
+#error unsupported page size
+#endif
 }
 
 static struct vm_operations_struct spufs_signal2_mmap_vmops = {
@@ -767,15 +881,15 @@ static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_ops = &spufs_signal2_mmap_vmops;
 	return 0;
 }
-#endif
+#else /* SPUFS_MMAP_4K */
+#define spufs_signal2_mmap NULL
+#endif /* !SPUFS_MMAP_4K */
 
 static struct file_operations spufs_signal2_fops = {
 	.open = spufs_signal2_open,
 	.read = spufs_signal2_read,
 	.write = spufs_signal2_write,
-#ifdef CONFIG_SPUFS_MMAP
 	.mmap = spufs_signal2_mmap,
-#endif
 };
 
 static void spufs_signal1_type_set(void *data, u64 val)
@@ -824,11 +938,11 @@ static u64 spufs_signal2_type_get(void *data)
 DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
 					spufs_signal2_type_set, "%llu");
 
-#ifdef CONFIG_SPUFS_MMAP
+#if SPUFS_MMAP_4K
 static struct page *spufs_mss_mmap_nopage(struct vm_area_struct *vma,
 					   unsigned long address, int *type)
 {
-	return spufs_ps_nopage(vma, address, type, 0x0000);
+	return spufs_ps_nopage(vma, address, type, 0x0000, 0x1000);
 }
 
 static struct vm_operations_struct spufs_mss_mmap_vmops = {
@@ -837,17 +951,12 @@ static struct vm_operations_struct spufs_mss_mmap_vmops = {
 
 /*
  * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
- * Mapping this area requires that the application have CAP_SYS_RAWIO,
- * as these registers require special care when read/writing.
  */
 static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	if (!(vma->vm_flags & VM_SHARED))
 		return -EINVAL;
 
-	if (!capable(CAP_SYS_RAWIO))
-		return -EPERM;
-
 	vma->vm_flags |= VM_RESERVED;
 	vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
 				     | _PAGE_NO_CACHE | _PAGE_GUARDED);
@@ -855,7 +964,9 @@ static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_ops = &spufs_mss_mmap_vmops;
 	return 0;
 }
-#endif
+#else /* SPUFS_MMAP_4K */
+#define spufs_mss_mmap NULL
+#endif /* !SPUFS_MMAP_4K */
 
 static int spufs_mss_open(struct inode *inode, struct file *file)
 {
@@ -867,17 +978,54 @@ static int spufs_mss_open(struct inode *inode, struct file *file)
 
 static struct file_operations spufs_mss_fops = {
 	.open	 = spufs_mss_open,
-#ifdef CONFIG_SPUFS_MMAP
 	.mmap	 = spufs_mss_mmap,
-#endif
+};
+
+static struct page *spufs_psmap_mmap_nopage(struct vm_area_struct *vma,
+					   unsigned long address, int *type)
+{
+	return spufs_ps_nopage(vma, address, type, 0x0000, 0x20000);
+}
+
+static struct vm_operations_struct spufs_psmap_mmap_vmops = {
+	.nopage = spufs_psmap_mmap_nopage,
+};
+
+/*
+ * mmap support for full problem state area [0x00000 - 0x1ffff].
+ */
+static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	if (!(vma->vm_flags & VM_SHARED))
+		return -EINVAL;
+
+	vma->vm_flags |= VM_RESERVED;
+	vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+				     | _PAGE_NO_CACHE | _PAGE_GUARDED);
+
+	vma->vm_ops = &spufs_psmap_mmap_vmops;
+	return 0;
+}
+
+static int spufs_psmap_open(struct inode *inode, struct file *file)
+{
+	struct spufs_inode_info *i = SPUFS_I(inode);
+
+	file->private_data = i->i_ctx;
+	return nonseekable_open(inode, file);
+}
+
+static struct file_operations spufs_psmap_fops = {
+	.open	 = spufs_psmap_open,
+	.mmap	 = spufs_psmap_mmap,
 };
 
 
-#ifdef CONFIG_SPUFS_MMAP
+#if SPUFS_MMAP_4K
 static struct page *spufs_mfc_mmap_nopage(struct vm_area_struct *vma,
 					   unsigned long address, int *type)
 {
-	return spufs_ps_nopage(vma, address, type, 0x3000);
+	return spufs_ps_nopage(vma, address, type, 0x3000, 0x1000);
 }
 
 static struct vm_operations_struct spufs_mfc_mmap_vmops = {
@@ -886,17 +1034,12 @@ static struct vm_operations_struct spufs_mfc_mmap_vmops = {
 
 /*
  * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
- * Mapping this area requires that the application have CAP_SYS_RAWIO,
- * as these registers require special care when read/writing.
  */
 static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	if (!(vma->vm_flags & VM_SHARED))
 		return -EINVAL;
 
-	if (!capable(CAP_SYS_RAWIO))
-		return -EPERM;
-
 	vma->vm_flags |= VM_RESERVED;
 	vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
 				     | _PAGE_NO_CACHE | _PAGE_GUARDED);
@@ -904,7 +1047,9 @@ static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_ops = &spufs_mfc_mmap_vmops;
 	return 0;
 }
-#endif
+#else /* SPUFS_MMAP_4K */
+#define spufs_mfc_mmap NULL
+#endif /* !SPUFS_MMAP_4K */
 
 static int spufs_mfc_open(struct inode *inode, struct file *file)
 {
@@ -1194,9 +1339,7 @@ static struct file_operations spufs_mfc_fops = {
 	.flush	 = spufs_mfc_flush,
 	.fsync	 = spufs_mfc_fsync,
 	.fasync	 = spufs_mfc_fasync,
-#ifdef CONFIG_SPUFS_MMAP
 	.mmap	 = spufs_mfc_mmap,
-#endif
 };
 
 static void spufs_npc_set(void *data, u64 val)
@@ -1344,6 +1487,21 @@ static u64 spufs_id_get(void *data)
 }
 DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n")
 
+static u64 spufs_object_id_get(void *data)
+{
+	struct spu_context *ctx = data;
+	return ctx->object_id;
+}
+
+static void spufs_object_id_set(void *data, u64 id)
+{
+	struct spu_context *ctx = data;
+	ctx->object_id = id;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
+		spufs_object_id_set, "0x%llx\n");
+
 struct tree_descr spufs_dir_contents[] = {
 	{ "mem",  &spufs_mem_fops,  0666, },
 	{ "regs", &spufs_regs_fops,  0666, },
@@ -1367,6 +1525,8 @@ struct tree_descr spufs_dir_contents[] = {
 	{ "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
 	{ "event_mask", &spufs_event_mask_ops, 0666, },
 	{ "srr0", &spufs_srr0_ops, 0666, },
+	{ "psmap", &spufs_psmap_fops, 0666, },
 	{ "phys-id", &spufs_id_ops, 0666, },
+	{ "object-id", &spufs_object_id_ops, 0666, },
 	{},
 };
diff --git a/arch/powerpc/platforms/cell/spufs/gang.c b/arch/powerpc/platforms/cell/spufs/gang.c
new file mode 100644
index 0000000..212ea78
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/gang.c
@@ -0,0 +1,81 @@
+/*
+ * SPU file system
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/list.h>
+#include <linux/slab.h>
+
+#include "spufs.h"
+
+struct spu_gang *alloc_spu_gang(void)
+{
+	struct spu_gang *gang;
+
+	gang = kzalloc(sizeof *gang, GFP_KERNEL);
+	if (!gang)
+		goto out;
+
+	kref_init(&gang->kref);
+	mutex_init(&gang->mutex);
+	INIT_LIST_HEAD(&gang->list);
+
+out:
+	return gang;
+}
+
+static void destroy_spu_gang(struct kref *kref)
+{
+	struct spu_gang *gang;
+	gang = container_of(kref, struct spu_gang, kref);
+	WARN_ON(gang->contexts || !list_empty(&gang->list));
+	kfree(gang);
+}
+
+struct spu_gang *get_spu_gang(struct spu_gang *gang)
+{
+	kref_get(&gang->kref);
+	return gang;
+}
+
+int put_spu_gang(struct spu_gang *gang)
+{
+	return kref_put(&gang->kref, &destroy_spu_gang);
+}
+
+void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx)
+{
+	mutex_lock(&gang->mutex);
+	ctx->gang = get_spu_gang(gang);
+	list_add(&ctx->gang_list, &gang->list);
+	gang->contexts++;
+	mutex_unlock(&gang->mutex);
+}
+
+void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx)
+{
+	mutex_lock(&gang->mutex);
+	WARN_ON(ctx->gang != gang);
+	list_del_init(&ctx->gang_list);
+	gang->contexts--;
+	mutex_unlock(&gang->mutex);
+
+	put_spu_gang(gang);
+}
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 3950ddc..427d00a 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -50,6 +50,10 @@ spufs_alloc_inode(struct super_block *sb)
 	ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL);
 	if (!ei)
 		return NULL;
+
+	ei->i_gang = NULL;
+	ei->i_ctx = NULL;
+
 	return &ei->vfs_inode;
 }
 
@@ -128,14 +132,19 @@ out:
 static void
 spufs_delete_inode(struct inode *inode)
 {
-	if (SPUFS_I(inode)->i_ctx)
-		put_spu_context(SPUFS_I(inode)->i_ctx);
+	struct spufs_inode_info *ei = SPUFS_I(inode);
+
+	if (ei->i_ctx)
+		put_spu_context(ei->i_ctx);
+	if (ei->i_gang)
+		put_spu_gang(ei->i_gang);
 	clear_inode(inode);
 }
 
 static void spufs_prune_dir(struct dentry *dir)
 {
 	struct dentry *dentry, *tmp;
+
 	mutex_lock(&dir->d_inode->i_mutex);
 	list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) {
 		spin_lock(&dcache_lock);
@@ -156,13 +165,13 @@ static void spufs_prune_dir(struct dentry *dir)
 	mutex_unlock(&dir->d_inode->i_mutex);
 }
 
-/* Caller must hold root->i_mutex */
-static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
+/* Caller must hold parent->i_mutex */
+static int spufs_rmdir(struct inode *parent, struct dentry *dir)
 {
 	/* remove all entries */
-	spufs_prune_dir(dir_dentry);
+	spufs_prune_dir(dir);
 
-	return simple_rmdir(root, dir_dentry);
+	return simple_rmdir(parent, dir);
 }
 
 static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
@@ -191,17 +200,17 @@ out:
 static int spufs_dir_close(struct inode *inode, struct file *file)
 {
 	struct spu_context *ctx;
-	struct inode *dir;
-	struct dentry *dentry;
+	struct inode *parent;
+	struct dentry *dir;
 	int ret;
 
-	dentry = file->f_dentry;
-	dir = dentry->d_parent->d_inode;
-	ctx = SPUFS_I(dentry->d_inode)->i_ctx;
+	dir = file->f_dentry;
+	parent = dir->d_parent->d_inode;
+	ctx = SPUFS_I(dir->d_inode)->i_ctx;
 
-	mutex_lock(&dir->i_mutex);
-	ret = spufs_rmdir(dir, dentry);
-	mutex_unlock(&dir->i_mutex);
+	mutex_lock(&parent->i_mutex);
+	ret = spufs_rmdir(parent, dir);
+	mutex_unlock(&parent->i_mutex);
 	WARN_ON(ret);
 
 	/* We have to give up the mm_struct */
@@ -224,7 +233,8 @@ struct file_operations spufs_context_fops = {
 };
 
 static int
-spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
+		int mode)
 {
 	int ret;
 	struct inode *inode;
@@ -239,11 +249,13 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 		inode->i_gid = dir->i_gid;
 		inode->i_mode &= S_ISGID;
 	}
-	ctx = alloc_spu_context();
+	ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */
 	SPUFS_I(inode)->i_ctx = ctx;
 	if (!ctx)
 		goto out_iput;
 
+	ctx->flags = flags;
+
 	inode->i_op = &spufs_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
 	ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
@@ -289,24 +301,177 @@ out:
 	return ret;
 }
 
+static int spufs_create_context(struct inode *inode,
+			struct dentry *dentry,
+			struct vfsmount *mnt, int flags, int mode)
+{
+	int ret;
+
+	ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO);
+	if (ret)
+		goto out_unlock;
+
+	/*
+	 * get references for dget and mntget, will be released
+	 * in error path of *_open().
+	 */
+	ret = spufs_context_open(dget(dentry), mntget(mnt));
+	if (ret < 0) {
+		WARN_ON(spufs_rmdir(inode, dentry));
+		mutex_unlock(&inode->i_mutex);
+		spu_forget(SPUFS_I(dentry->d_inode)->i_ctx);
+		goto out;
+	}
+
+out_unlock:
+	mutex_unlock(&inode->i_mutex);
+out:
+	dput(dentry);
+	return ret;
+}
+
+static int spufs_rmgang(struct inode *root, struct dentry *dir)
+{
+	/* FIXME: this fails if the dir is not empty,
+	          which causes a leak of gangs. */
+	return simple_rmdir(root, dir);
+}
+
+static int spufs_gang_close(struct inode *inode, struct file *file)
+{
+	struct inode *parent;
+	struct dentry *dir;
+	int ret;
+
+	dir = file->f_dentry;
+	parent = dir->d_parent->d_inode;
+
+	ret = spufs_rmgang(parent, dir);
+	WARN_ON(ret);
+
+	return dcache_dir_close(inode, file);
+}
+
+struct file_operations spufs_gang_fops = {
+	.open		= dcache_dir_open,
+	.release	= spufs_gang_close,
+	.llseek		= dcache_dir_lseek,
+	.read		= generic_read_dir,
+	.readdir	= dcache_readdir,
+	.fsync		= simple_sync_file,
+};
+
+static int
+spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode)
+{
+	int ret;
+	struct inode *inode;
+	struct spu_gang *gang;
+
+	ret = -ENOSPC;
+	inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
+	if (!inode)
+		goto out;
+
+	ret = 0;
+	if (dir->i_mode & S_ISGID) {
+		inode->i_gid = dir->i_gid;
+		inode->i_mode &= S_ISGID;
+	}
+	gang = alloc_spu_gang();
+	SPUFS_I(inode)->i_ctx = NULL;
+	SPUFS_I(inode)->i_gang = gang;
+	if (!gang)
+		goto out_iput;
+
+	inode->i_op = &spufs_dir_inode_operations;
+	inode->i_fop = &simple_dir_operations;
+
+	d_instantiate(dentry, inode);
+	dget(dentry);
+	dir->i_nlink++;
+	dentry->d_inode->i_nlink++;
+	return ret;
+
+out_iput:
+	iput(inode);
+out:
+	return ret;
+}
+
+static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt)
+{
+	int ret;
+	struct file *filp;
+
+	ret = get_unused_fd();
+	if (ret < 0) {
+		dput(dentry);
+		mntput(mnt);
+		goto out;
+	}
+
+	filp = dentry_open(dentry, mnt, O_RDONLY);
+	if (IS_ERR(filp)) {
+		put_unused_fd(ret);
+		ret = PTR_ERR(filp);
+		goto out;
+	}
+
+	filp->f_op = &spufs_gang_fops;
+	fd_install(ret, filp);
+out:
+	return ret;
+}
+
+static int spufs_create_gang(struct inode *inode,
+			struct dentry *dentry,
+			struct vfsmount *mnt, int mode)
+{
+	int ret;
+
+	ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO);
+	if (ret)
+		goto out;
+
+	/*
+	 * get references for dget and mntget, will be released
+	 * in error path of *_open().
+	 */
+	ret = spufs_gang_open(dget(dentry), mntget(mnt));
+	if (ret < 0)
+		WARN_ON(spufs_rmgang(inode, dentry));
+
+out:
+	mutex_unlock(&inode->i_mutex);
+	dput(dentry);
+	return ret;
+}
+
+
 static struct file_system_type spufs_type;
 
-long spufs_create_thread(struct nameidata *nd,
-			 unsigned int flags, mode_t mode)
+long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode)
 {
 	struct dentry *dentry;
 	int ret;
 
-	/* need to be at the root of spufs */
 	ret = -EINVAL;
-	if (nd->dentry->d_sb->s_type != &spufs_type ||
-	    nd->dentry != nd->dentry->d_sb->s_root)
+	/* check if we are on spufs */
+	if (nd->dentry->d_sb->s_type != &spufs_type)
 		goto out;
 
-	/* all flags are reserved */
-	if (flags)
+	/* don't accept undefined flags */
+	if (flags & (~SPU_CREATE_FLAG_ALL))
 		goto out;
 
+	/* only threads can be underneath a gang */
+	if (nd->dentry != nd->dentry->d_sb->s_root) {
+		if ((flags & SPU_CREATE_GANG) ||
+		    !SPUFS_I(nd->dentry->d_inode)->i_gang)
+			goto out;
+	}
+
 	dentry = lookup_create(nd, 1);
 	ret = PTR_ERR(dentry);
 	if (IS_ERR(dentry))
@@ -317,22 +482,13 @@ long spufs_create_thread(struct nameidata *nd,
 		goto out_dput;
 
 	mode &= ~current->fs->umask;
-	ret = spufs_mkdir(nd->dentry->d_inode, dentry, mode & S_IRWXUGO);
-	if (ret)
-		goto out_dput;
 
-	/*
-	 * get references for dget and mntget, will be released
-	 * in error path of *_open().
-	 */
-	ret = spufs_context_open(dget(dentry), mntget(nd->mnt));
-	if (ret < 0) {
-		WARN_ON(spufs_rmdir(nd->dentry->d_inode, dentry));
-		mutex_unlock(&nd->dentry->d_inode->i_mutex);
-		spu_forget(SPUFS_I(dentry->d_inode)->i_ctx);
-		dput(dentry);
-		goto out;
-	}
+	if (flags & SPU_CREATE_GANG)
+		return spufs_create_gang(nd->dentry->d_inode,
+					dentry, nd->mnt, mode);
+	else
+		return spufs_create_context(nd->dentry->d_inode,
+					dentry, nd->mnt, flags, mode);
 
 out_dput:
 	dput(dentry);
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index 483c8b7..63df8cf 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -14,6 +14,26 @@ void spufs_stop_callback(struct spu *spu)
 	wake_up_all(&ctx->stop_wq);
 }
 
+void spufs_dma_callback(struct spu *spu, int type)
+{
+	struct spu_context *ctx = spu->ctx;
+
+	if (ctx->flags & SPU_CREATE_EVENTS_ENABLED) {
+		ctx->event_return |= type;
+		wake_up_all(&ctx->stop_wq);
+	} else {
+		switch (type) {
+		case SPE_EVENT_DMA_ALIGNMENT:
+		case SPE_EVENT_INVALID_DMA:
+			force_sig(SIGBUS, /* info, */ current);
+			break;
+		case SPE_EVENT_SPE_ERROR:
+			force_sig(SIGILL, /* info */ current);
+			break;
+		}
+	}
+}
+
 static inline int spu_stopped(struct spu_context *ctx, u32 * stat)
 {
 	struct spu *spu;
@@ -28,8 +48,7 @@ static inline int spu_stopped(struct spu_context *ctx, u32 * stat)
 	return (!(*stat & 0x1) || pte_fault || spu->class_0_pending) ? 1 : 0;
 }
 
-static inline int spu_run_init(struct spu_context *ctx, u32 * npc,
-			       u32 * status)
+static inline int spu_run_init(struct spu_context *ctx, u32 * npc)
 {
 	int ret;
 
@@ -72,7 +91,7 @@ static inline int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc,
 		       SPU_STATUS_STOPPED_BY_HALT)) {
 		return *status;
 	}
-	if ((ret = spu_run_init(ctx, npc, status)) != 0)
+	if ((ret = spu_run_init(ctx, npc)) != 0)
 		return ret;
 	return 0;
 }
@@ -177,46 +196,49 @@ static inline int spu_process_events(struct spu_context *ctx)
 }
 
 long spufs_run_spu(struct file *file, struct spu_context *ctx,
-		   u32 * npc, u32 * status)
+		   u32 *npc, u32 *event)
 {
 	int ret;
+	u32 status;
 
 	if (down_interruptible(&ctx->run_sema))
 		return -ERESTARTSYS;
 
-	ret = spu_run_init(ctx, npc, status);
+	ctx->event_return = 0;
+	ret = spu_run_init(ctx, npc);
 	if (ret)
 		goto out;
 
 	do {
-		ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, status));
+		ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, &status));
 		if (unlikely(ret))
 			break;
-		if ((*status & SPU_STATUS_STOPPED_BY_STOP) &&
-		    (*status >> SPU_STOP_STATUS_SHIFT == 0x2104)) {
+		if ((status & SPU_STATUS_STOPPED_BY_STOP) &&
+		    (status >> SPU_STOP_STATUS_SHIFT == 0x2104)) {
 			ret = spu_process_callback(ctx);
 			if (ret)
 				break;
-			*status &= ~SPU_STATUS_STOPPED_BY_STOP;
+			status &= ~SPU_STATUS_STOPPED_BY_STOP;
 		}
 		if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) {
-			ret = spu_reacquire_runnable(ctx, npc, status);
+			ret = spu_reacquire_runnable(ctx, npc, &status);
 			if (ret)
 				goto out;
 			continue;
 		}
 		ret = spu_process_events(ctx);
 
-	} while (!ret && !(*status & (SPU_STATUS_STOPPED_BY_STOP |
+	} while (!ret && !(status & (SPU_STATUS_STOPPED_BY_STOP |
 				      SPU_STATUS_STOPPED_BY_HALT)));
 
 	ctx->ops->runcntl_stop(ctx);
-	ret = spu_run_fini(ctx, npc, status);
+	ret = spu_run_fini(ctx, npc, &status);
 	if (!ret)
-		ret = *status;
+		ret = status;
 	spu_yield(ctx);
 
 out:
+	*event = ctx->event_return;
 	up(&ctx->run_sema);
 	return ret;
 }
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 1350294..bd6fe4b 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -3,11 +3,7 @@
  * Copyright (C) IBM 2005
  * Author: Mark Nutter <mnutter@us.ibm.com>
  *
- * SPU scheduler, based on Linux thread priority.  For now use
- * a simple "cooperative" yield model with no preemption.  SPU
- * scheduling will eventually be preemptive: When a thread with
- * a higher static priority gets ready to run, then an active SPU
- * context will be preempted and returned to the waitq.
+ * 2006-03-31	NUMA domains added.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -37,6 +33,9 @@
 #include <linux/smp_lock.h>
 #include <linux/stddef.h>
 #include <linux/unistd.h>
+#include <linux/numa.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
 
 #include <asm/io.h>
 #include <asm/mmu_context.h>
@@ -49,128 +48,59 @@
 
 #define SPU_BITMAP_SIZE (((MAX_PRIO+BITS_PER_LONG)/BITS_PER_LONG)+1)
 struct spu_prio_array {
-	atomic_t nr_blocked;
 	unsigned long bitmap[SPU_BITMAP_SIZE];
 	wait_queue_head_t waitq[MAX_PRIO];
+	struct list_head active_list[MAX_NUMNODES];
+	struct mutex active_mutex[MAX_NUMNODES];
 };
 
-/* spu_runqueue - This is the main runqueue data structure for SPUs. */
-struct spu_runqueue {
-	struct semaphore sem;
-	unsigned long nr_active;
-	unsigned long nr_idle;
-	unsigned long nr_switches;
-	struct list_head active_list;
-	struct list_head idle_list;
-	struct spu_prio_array prio;
-};
-
-static struct spu_runqueue *spu_runqueues = NULL;
-
-static inline struct spu_runqueue *spu_rq(void)
-{
-	/* Future: make this a per-NODE array,
-	 * and use cpu_to_node(smp_processor_id())
-	 */
-	return spu_runqueues;
-}
+static struct spu_prio_array *spu_prio;
 
-static inline struct spu *del_idle(struct spu_runqueue *rq)
+static inline int node_allowed(int node)
 {
-	struct spu *spu;
+	cpumask_t mask;
 
-	BUG_ON(rq->nr_idle <= 0);
-	BUG_ON(list_empty(&rq->idle_list));
-	/* Future: Move SPU out of low-power SRI state. */
-	spu = list_entry(rq->idle_list.next, struct spu, sched_list);
-	list_del_init(&spu->sched_list);
-	rq->nr_idle--;
-	return spu;
+	if (!nr_cpus_node(node))
+		return 0;
+	mask = node_to_cpumask(node);
+	if (!cpus_intersects(mask, current->cpus_allowed))
+		return 0;
+	return 1;
 }
 
-static inline void del_active(struct spu_runqueue *rq, struct spu *spu)
+static inline void mm_needs_global_tlbie(struct mm_struct *mm)
 {
-	BUG_ON(rq->nr_active <= 0);
-	BUG_ON(list_empty(&rq->active_list));
-	list_del_init(&spu->sched_list);
-	rq->nr_active--;
-}
+	int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1;
 
-static inline void add_idle(struct spu_runqueue *rq, struct spu *spu)
-{
-	/* Future: Put SPU into low-power SRI state. */
-	list_add_tail(&spu->sched_list, &rq->idle_list);
-	rq->nr_idle++;
+	/* Global TLBIE broadcast required with SPEs. */
+	__cpus_setall(&mm->cpu_vm_mask, nr);
 }
 
-static inline void add_active(struct spu_runqueue *rq, struct spu *spu)
-{
-	rq->nr_active++;
-	rq->nr_switches++;
-	list_add_tail(&spu->sched_list, &rq->active_list);
-}
+static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier);
 
-static void prio_wakeup(struct spu_runqueue *rq)
+static void spu_switch_notify(struct spu *spu, struct spu_context *ctx)
 {
-	if (atomic_read(&rq->prio.nr_blocked) && rq->nr_idle) {
-		int best = sched_find_first_bit(rq->prio.bitmap);
-		if (best < MAX_PRIO) {
-			wait_queue_head_t *wq = &rq->prio.waitq[best];
-			wake_up_interruptible_nr(wq, 1);
-		}
-	}
+	blocking_notifier_call_chain(&spu_switch_notifier,
+			    ctx ? ctx->object_id : 0, spu);
 }
 
-static void prio_wait(struct spu_runqueue *rq, struct spu_context *ctx,
-		      u64 flags)
+int spu_switch_event_register(struct notifier_block * n)
 {
-	int prio = current->prio;
-	wait_queue_head_t *wq = &rq->prio.waitq[prio];
-	DEFINE_WAIT(wait);
-
-	__set_bit(prio, rq->prio.bitmap);
-	atomic_inc(&rq->prio.nr_blocked);
-	prepare_to_wait_exclusive(wq, &wait, TASK_INTERRUPTIBLE);
-	if (!signal_pending(current)) {
-		up(&rq->sem);
-		up_write(&ctx->state_sema);
-		pr_debug("%s: pid=%d prio=%d\n", __FUNCTION__,
-			 current->pid, current->prio);
-		schedule();
-		down_write(&ctx->state_sema);
-		down(&rq->sem);
-	}
-	finish_wait(wq, &wait);
-	atomic_dec(&rq->prio.nr_blocked);
-	if (!waitqueue_active(wq))
-		__clear_bit(prio, rq->prio.bitmap);
+	return blocking_notifier_chain_register(&spu_switch_notifier, n);
 }
 
-static inline int is_best_prio(struct spu_runqueue *rq)
+int spu_switch_event_unregister(struct notifier_block * n)
 {
-	int best_prio;
-
-	best_prio = sched_find_first_bit(rq->prio.bitmap);
-	return (current->prio < best_prio) ? 1 : 0;
+	return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
 }
 
-static inline void mm_needs_global_tlbie(struct mm_struct *mm)
-{
-	/* Global TLBIE broadcast required with SPEs. */
-#if (NR_CPUS > 1)
-	__cpus_setall(&mm->cpu_vm_mask, NR_CPUS);
-#else
-	__cpus_setall(&mm->cpu_vm_mask, NR_CPUS+1); /* is this ok? */
-#endif
-}
 
 static inline void bind_context(struct spu *spu, struct spu_context *ctx)
 {
-	pr_debug("%s: pid=%d SPU=%d\n", __FUNCTION__, current->pid,
-		 spu->number);
+	pr_debug("%s: pid=%d SPU=%d NODE=%d\n", __FUNCTION__, current->pid,
+		 spu->number, spu->node);
 	spu->ctx = ctx;
 	spu->flags = 0;
-	ctx->flags = 0;
 	ctx->spu = spu;
 	ctx->ops = &spu_hw_ops;
 	spu->pid = current->pid;
@@ -181,16 +111,20 @@ static inline void bind_context(struct spu *spu, struct spu_context *ctx)
 	spu->wbox_callback = spufs_wbox_callback;
 	spu->stop_callback = spufs_stop_callback;
 	spu->mfc_callback = spufs_mfc_callback;
+	spu->dma_callback = spufs_dma_callback;
 	mb();
 	spu_unmap_mappings(ctx);
 	spu_restore(&ctx->csa, spu);
 	spu->timestamp = jiffies;
+	spu_cpu_affinity_set(spu, raw_smp_processor_id());
+	spu_switch_notify(spu, ctx);
 }
 
 static inline void unbind_context(struct spu *spu, struct spu_context *ctx)
 {
-	pr_debug("%s: unbind pid=%d SPU=%d\n", __FUNCTION__,
-		 spu->pid, spu->number);
+	pr_debug("%s: unbind pid=%d SPU=%d NODE=%d\n", __FUNCTION__,
+		 spu->pid, spu->number, spu->node);
+	spu_switch_notify(spu, NULL);
 	spu_unmap_mappings(ctx);
 	spu_save(&ctx->csa, spu);
 	spu->timestamp = jiffies;
@@ -199,173 +133,158 @@ static inline void unbind_context(struct spu *spu, struct spu_context *ctx)
 	spu->wbox_callback = NULL;
 	spu->stop_callback = NULL;
 	spu->mfc_callback = NULL;
+	spu->dma_callback = NULL;
 	spu->mm = NULL;
 	spu->pid = 0;
 	spu->prio = MAX_PRIO;
 	ctx->ops = &spu_backing_ops;
 	ctx->spu = NULL;
-	ctx->flags = 0;
 	spu->flags = 0;
 	spu->ctx = NULL;
 }
 
-static void spu_reaper(void *data)
+static inline void spu_add_wq(wait_queue_head_t * wq, wait_queue_t * wait,
+			      int prio)
 {
-	struct spu_context *ctx = data;
-	struct spu *spu;
-
-	down_write(&ctx->state_sema);
-	spu = ctx->spu;
-	if (spu && test_bit(SPU_CONTEXT_PREEMPT, &ctx->flags)) {
-		if (atomic_read(&spu->rq->prio.nr_blocked)) {
-			pr_debug("%s: spu=%d\n", __func__, spu->number);
-			ctx->ops->runcntl_stop(ctx);
-			spu_deactivate(ctx);
-			wake_up_all(&ctx->stop_wq);
-		} else {
-			clear_bit(SPU_CONTEXT_PREEMPT, &ctx->flags);
-		}
-	}
-	up_write(&ctx->state_sema);
-	put_spu_context(ctx);
+	prepare_to_wait_exclusive(wq, wait, TASK_INTERRUPTIBLE);
+	set_bit(prio, spu_prio->bitmap);
 }
 
-static void schedule_spu_reaper(struct spu_runqueue *rq, struct spu *spu)
+static inline void spu_del_wq(wait_queue_head_t * wq, wait_queue_t * wait,
+			      int prio)
 {
-	struct spu_context *ctx = get_spu_context(spu->ctx);
-	unsigned long now = jiffies;
-	unsigned long expire = spu->timestamp + SPU_MIN_TIMESLICE;
-
-	set_bit(SPU_CONTEXT_PREEMPT, &ctx->flags);
-	INIT_WORK(&ctx->reap_work, spu_reaper, ctx);
-	if (time_after(now, expire))
-		schedule_work(&ctx->reap_work);
-	else
-		schedule_delayed_work(&ctx->reap_work, expire - now);
-}
+	u64 flags;
 
-static void check_preempt_active(struct spu_runqueue *rq)
-{
-	struct list_head *p;
-	struct spu *worst = NULL;
-
-	list_for_each(p, &rq->active_list) {
-		struct spu *spu = list_entry(p, struct spu, sched_list);
-		struct spu_context *ctx = spu->ctx;
-		if (!test_bit(SPU_CONTEXT_PREEMPT, &ctx->flags)) {
-			if (!worst || (spu->prio > worst->prio)) {
-				worst = spu;
-			}
-		}
-	}
-	if (worst && (current->prio < worst->prio))
-		schedule_spu_reaper(rq, worst);
+	__set_current_state(TASK_RUNNING);
+
+	spin_lock_irqsave(&wq->lock, flags);
+
+	remove_wait_queue_locked(wq, wait);
+	if (list_empty(&wq->task_list))
+		clear_bit(prio, spu_prio->bitmap);
+
+	spin_unlock_irqrestore(&wq->lock, flags);
 }
 
-static struct spu *get_idle_spu(struct spu_context *ctx, u64 flags)
+static void spu_prio_wait(struct spu_context *ctx, u64 flags)
 {
-	struct spu_runqueue *rq;
-	struct spu *spu = NULL;
+	int prio = current->prio;
+	wait_queue_head_t *wq = &spu_prio->waitq[prio];
+	DEFINE_WAIT(wait);
 
-	rq = spu_rq();
-	down(&rq->sem);
-	for (;;) {
-		if (rq->nr_idle > 0) {
-			if (is_best_prio(rq)) {
-				/* Fall through. */
-				spu = del_idle(rq);
-				break;
-			} else {
-				prio_wakeup(rq);
-				up(&rq->sem);
-				yield();
-				if (signal_pending(current)) {
-					return NULL;
-				}
-				rq = spu_rq();
-				down(&rq->sem);
-				continue;
-			}
-		} else {
-			check_preempt_active(rq);
-			prio_wait(rq, ctx, flags);
-			if (signal_pending(current)) {
-				prio_wakeup(rq);
-				spu = NULL;
-				break;
-			}
-			continue;
-		}
+	if (ctx->spu)
+		return;
+
+	spu_add_wq(wq, &wait, prio);
+
+	if (!signal_pending(current)) {
+		up_write(&ctx->state_sema);
+		pr_debug("%s: pid=%d prio=%d\n", __FUNCTION__,
+			 current->pid, current->prio);
+		schedule();
+		down_write(&ctx->state_sema);
 	}
-	up(&rq->sem);
-	return spu;
+
+	spu_del_wq(wq, &wait, prio);
 }
 
-static void put_idle_spu(struct spu *spu)
+static void spu_prio_wakeup(void)
 {
-	struct spu_runqueue *rq = spu->rq;
-
-	down(&rq->sem);
-	add_idle(rq, spu);
-	prio_wakeup(rq);
-	up(&rq->sem);
+	int best = sched_find_first_bit(spu_prio->bitmap);
+	if (best < MAX_PRIO) {
+		wait_queue_head_t *wq = &spu_prio->waitq[best];
+		wake_up_interruptible_nr(wq, 1);
+	}
 }
 
 static int get_active_spu(struct spu *spu)
 {
-	struct spu_runqueue *rq = spu->rq;
-	struct list_head *p;
+	int node = spu->node;
 	struct spu *tmp;
 	int rc = 0;
 
-	down(&rq->sem);
-	list_for_each(p, &rq->active_list) {
-		tmp = list_entry(p, struct spu, sched_list);
+	mutex_lock(&spu_prio->active_mutex[node]);
+	list_for_each_entry(tmp, &spu_prio->active_list[node], list) {
 		if (tmp == spu) {
-			del_active(rq, spu);
+			list_del_init(&spu->list);
 			rc = 1;
 			break;
 		}
 	}
-	up(&rq->sem);
+	mutex_unlock(&spu_prio->active_mutex[node]);
 	return rc;
 }
 
 static void put_active_spu(struct spu *spu)
 {
-	struct spu_runqueue *rq = spu->rq;
+	int node = spu->node;
+
+	mutex_lock(&spu_prio->active_mutex[node]);
+	list_add_tail(&spu->list, &spu_prio->active_list[node]);
+	mutex_unlock(&spu_prio->active_mutex[node]);
+}
+
+static struct spu *spu_get_idle(struct spu_context *ctx, u64 flags)
+{
+	struct spu *spu = NULL;
+	int node = cpu_to_node(raw_smp_processor_id());
+	int n;
 
-	down(&rq->sem);
-	add_active(rq, spu);
-	up(&rq->sem);
+	for (n = 0; n < MAX_NUMNODES; n++, node++) {
+		node = (node < MAX_NUMNODES) ? node : 0;
+		if (!node_allowed(node))
+			continue;
+		spu = spu_alloc_node(node);
+		if (spu)
+			break;
+	}
+	return spu;
 }
 
-/* Lock order:
- *	spu_activate() & spu_deactivate() require the
- *	caller to have down_write(&ctx->state_sema).
+static inline struct spu *spu_get(struct spu_context *ctx, u64 flags)
+{
+	/* Future: spu_get_idle() if possible,
+	 * otherwise try to preempt an active
+	 * context.
+	 */
+	return spu_get_idle(ctx, flags);
+}
+
+/* The three externally callable interfaces
+ * for the scheduler begin here.
  *
- *	The rq->sem is breifly held (inside or outside a
- *	given ctx lock) for list management, but is never
- *	held during save/restore.
+ *	spu_activate	- bind a context to SPU, waiting as needed.
+ *	spu_deactivate	- unbind a context from its SPU.
+ *	spu_yield	- yield an SPU if others are waiting.
  */
 
 int spu_activate(struct spu_context *ctx, u64 flags)
 {
 	struct spu *spu;
+	int ret = 0;
 
-	if (ctx->spu)
-		return 0;
-	spu = get_idle_spu(ctx, flags);
-	if (!spu)
-		return (signal_pending(current)) ? -ERESTARTSYS : -EAGAIN;
-	bind_context(spu, ctx);
-	/*
-	 * We're likely to wait for interrupts on the same
-	 * CPU that we are now on, so send them here.
-	 */
-	spu_cpu_affinity_set(spu, raw_smp_processor_id());
-	put_active_spu(spu);
-	return 0;
+	for (;;) {
+		if (ctx->spu)
+			return 0;
+		spu = spu_get(ctx, flags);
+		if (spu != NULL) {
+			if (ctx->spu != NULL) {
+				spu_free(spu);
+				spu_prio_wakeup();
+				break;
+			}
+			bind_context(spu, ctx);
+			put_active_spu(spu);
+			break;
+		}
+		spu_prio_wait(ctx, flags);
+		if (signal_pending(current)) {
+			ret = -ERESTARTSYS;
+			spu_prio_wakeup();
+			break;
+		}
+	}
+	return ret;
 }
 
 void spu_deactivate(struct spu_context *ctx)
@@ -378,8 +297,10 @@ void spu_deactivate(struct spu_context *ctx)
 		return;
 	needs_idle = get_active_spu(spu);
 	unbind_context(spu, ctx);
-	if (needs_idle)
-		put_idle_spu(spu);
+	if (needs_idle) {
+		spu_free(spu);
+		spu_prio_wakeup();
+	}
 }
 
 void spu_yield(struct spu_context *ctx)
@@ -387,77 +308,60 @@ void spu_yield(struct spu_context *ctx)
 	struct spu *spu;
 	int need_yield = 0;
 
-	down_write(&ctx->state_sema);
-	spu = ctx->spu;
-	if (spu && (sched_find_first_bit(spu->rq->prio.bitmap) < MAX_PRIO)) {
-		pr_debug("%s: yielding SPU %d\n", __FUNCTION__, spu->number);
-		spu_deactivate(ctx);
-		ctx->state = SPU_STATE_SAVED;
-		need_yield = 1;
-	} else if (spu) {
-		spu->prio = MAX_PRIO;
+	if (down_write_trylock(&ctx->state_sema)) {
+		if ((spu = ctx->spu) != NULL) {
+			int best = sched_find_first_bit(spu_prio->bitmap);
+			if (best < MAX_PRIO) {
+				pr_debug("%s: yielding SPU %d NODE %d\n",
+					 __FUNCTION__, spu->number, spu->node);
+				spu_deactivate(ctx);
+				ctx->state = SPU_STATE_SAVED;
+				need_yield = 1;
+			} else {
+				spu->prio = MAX_PRIO;
+			}
+		}
+		up_write(&ctx->state_sema);
 	}
-	up_write(&ctx->state_sema);
 	if (unlikely(need_yield))
 		yield();
 }
 
 int __init spu_sched_init(void)
 {
-	struct spu_runqueue *rq;
-	struct spu *spu;
 	int i;
 
-	rq = spu_runqueues = kmalloc(sizeof(struct spu_runqueue), GFP_KERNEL);
-	if (!rq) {
-		printk(KERN_WARNING "%s: Unable to allocate runqueues.\n",
+	spu_prio = kzalloc(sizeof(struct spu_prio_array), GFP_KERNEL);
+	if (!spu_prio) {
+		printk(KERN_WARNING "%s: Unable to allocate priority queue.\n",
 		       __FUNCTION__);
 		return 1;
 	}
-	memset(rq, 0, sizeof(struct spu_runqueue));
-	init_MUTEX(&rq->sem);
-	INIT_LIST_HEAD(&rq->active_list);
-	INIT_LIST_HEAD(&rq->idle_list);
-	rq->nr_active = 0;
-	rq->nr_idle = 0;
-	rq->nr_switches = 0;
-	atomic_set(&rq->prio.nr_blocked, 0);
 	for (i = 0; i < MAX_PRIO; i++) {
-		init_waitqueue_head(&rq->prio.waitq[i]);
-		__clear_bit(i, rq->prio.bitmap);
+		init_waitqueue_head(&spu_prio->waitq[i]);
+		__clear_bit(i, spu_prio->bitmap);
 	}
-	__set_bit(MAX_PRIO, rq->prio.bitmap);
-	for (;;) {
-		spu = spu_alloc();
-		if (!spu)
-			break;
-		pr_debug("%s: adding SPU[%d]\n", __FUNCTION__, spu->number);
-		add_idle(rq, spu);
-		spu->rq = rq;
-		spu->timestamp = jiffies;
-	}
-	if (!rq->nr_idle) {
-		printk(KERN_WARNING "%s: No available SPUs.\n", __FUNCTION__);
-		kfree(rq);
-		return 1;
+	__set_bit(MAX_PRIO, spu_prio->bitmap);
+	for (i = 0; i < MAX_NUMNODES; i++) {
+		mutex_init(&spu_prio->active_mutex[i]);
+		INIT_LIST_HEAD(&spu_prio->active_list[i]);
 	}
 	return 0;
 }
 
 void __exit spu_sched_exit(void)
 {
-	struct spu_runqueue *rq = spu_rq();
-	struct spu *spu;
-
-	if (!rq) {
-		printk(KERN_WARNING "%s: no runqueues!\n", __FUNCTION__);
-		return;
-	}
-	while (rq->nr_idle > 0) {
-		spu = del_idle(rq);
-		if (!spu)
-			break;
-		spu_free(spu);
+	struct spu *spu, *tmp;
+	int node;
+
+	for (node = 0; node < MAX_NUMNODES; node++) {
+		mutex_lock(&spu_prio->active_mutex[node]);
+		list_for_each_entry_safe(spu, tmp, &spu_prio->active_list[node],
+					 list) {
+			list_del_init(&spu->list);
+			spu_free(spu);
+		}
+		mutex_unlock(&spu_prio->active_mutex[node]);
 	}
-	kfree(rq);
+	kfree(spu_prio);
 }
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index 4485738..a0f55ca 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -39,6 +39,8 @@ struct spu_context_ops;
 
 #define SPU_CONTEXT_PREEMPT          0UL
 
+struct spu_gang;
+
 struct spu_context {
 	struct spu *spu;		  /* pointer to a physical SPU */
 	struct spu_state csa;		  /* SPU context save area. */
@@ -48,6 +50,7 @@ struct spu_context {
 	struct address_space *cntl; 	   /* 'control' area mappings. */
 	struct address_space *signal1; 	   /* 'signal1' area mappings. */
 	struct address_space *signal2; 	   /* 'signal2' area mappings. */
+	u64 object_id;		   /* user space pointer for oprofile */
 
 	enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
 	struct rw_semaphore state_sema;
@@ -66,7 +69,18 @@ struct spu_context {
 	u32 tagwait;
 	struct spu_context_ops *ops;
 	struct work_struct reap_work;
-	u64 flags;
+	unsigned long flags;
+	unsigned long event_return;
+
+	struct list_head gang_list;
+	struct spu_gang *gang;
+};
+
+struct spu_gang {
+	struct list_head list;
+	struct mutex mutex;
+	struct kref kref;
+	int contexts;
 };
 
 struct mfc_dma_command {
@@ -114,6 +128,7 @@ extern struct spu_context_ops spu_backing_ops;
 
 struct spufs_inode_info {
 	struct spu_context *i_ctx;
+	struct spu_gang *i_gang;
 	struct inode vfs_inode;
 };
 #define SPUFS_I(inode) \
@@ -124,12 +139,19 @@ extern struct tree_descr spufs_dir_contents[];
 /* system call implementation */
 long spufs_run_spu(struct file *file,
 		   struct spu_context *ctx, u32 *npc, u32 *status);
-long spufs_create_thread(struct nameidata *nd,
+long spufs_create(struct nameidata *nd,
 			 unsigned int flags, mode_t mode);
 extern struct file_operations spufs_context_fops;
 
+/* gang management */
+struct spu_gang *alloc_spu_gang(void);
+struct spu_gang *get_spu_gang(struct spu_gang *gang);
+int put_spu_gang(struct spu_gang *gang);
+void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
+void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);
+
 /* context management */
-struct spu_context * alloc_spu_context(void);
+struct spu_context * alloc_spu_context(struct spu_gang *gang);
 void destroy_spu_context(struct kref *kref);
 struct spu_context * get_spu_context(struct spu_context *ctx);
 int put_spu_context(struct spu_context *ctx);
@@ -183,5 +205,6 @@ void spufs_ibox_callback(struct spu *spu);
 void spufs_wbox_callback(struct spu *spu);
 void spufs_stop_callback(struct spu *spu);
 void spufs_mfc_callback(struct spu *spu);
+void spufs_dma_callback(struct spu *spu, int type);
 
 #endif
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index 9d9d82d..0f782ca 100644
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -1779,6 +1779,15 @@ static inline void restore_mfc_cntl(struct spu_state *csa, struct spu *spu)
 	 */
 	out_be64(&priv2->mfc_control_RW, csa->priv2.mfc_control_RW);
 	eieio();
+	/*
+	 * FIXME: this is to restart a DMA that we were processing
+	 *        before the save. better remember the fault information
+	 *        in the csa instead.
+	 */
+	if ((csa->priv2.mfc_control_RW & MFC_CNTL_SUSPEND_DMA_QUEUE_MASK)) {
+		out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
+		eieio();
+	}
 }
 
 static inline void enable_user_access(struct spu_state *csa, struct spu *spu)
diff --git a/arch/powerpc/platforms/cell/spufs/syscalls.c b/arch/powerpc/platforms/cell/spufs/syscalls.c
index e6565a9..a6d1ae4 100644
--- a/arch/powerpc/platforms/cell/spufs/syscalls.c
+++ b/arch/powerpc/platforms/cell/spufs/syscalls.c
@@ -38,7 +38,7 @@ static long do_spu_run(struct file *filp,
 	u32 npc, status;
 
 	ret = -EFAULT;
-	if (get_user(npc, unpc) || get_user(status, ustatus))
+	if (get_user(npc, unpc))
 		goto out;
 
 	/* check if this file was created by spu_create */
@@ -49,7 +49,10 @@ static long do_spu_run(struct file *filp,
 	i = SPUFS_I(filp->f_dentry->d_inode);
 	ret = spufs_run_spu(filp, i->i_ctx, &npc, &status);
 
-	if (put_user(npc, unpc) || put_user(status, ustatus))
+	if (put_user(npc, unpc))
+		ret = -EFAULT;
+
+	if (ustatus && put_user(status, ustatus))
 		ret = -EFAULT;
 out:
 	return ret;
@@ -87,7 +90,7 @@ asmlinkage long sys_spu_create(const char __user *pathname,
 		ret = path_lookup(tmp, LOOKUP_PARENT|
 				LOOKUP_OPEN|LOOKUP_CREATE, &nd);
 		if (!ret) {
-			ret = spufs_create_thread(&nd, flags, mode);
+			ret = spufs_create(&nd, flags, mode);
 			path_release(&nd);
 		}
 		putname(tmp);
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index b42b53c..e73ea00 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -138,6 +138,7 @@ struct spu {
 	void (* ibox_callback)(struct spu *spu);
 	void (* stop_callback)(struct spu *spu);
 	void (* mfc_callback)(struct spu *spu);
+	void (* dma_callback)(struct spu *spu, int type);
 
 	char irq_c0[8];
 	char irq_c1[8];
@@ -147,6 +148,7 @@ struct spu {
 };
 
 struct spu *spu_alloc(void);
+struct spu *spu_alloc_node(int node);
 void spu_free(struct spu *spu);
 int spu_irq_class_0_bottom(struct spu *spu);
 int spu_irq_class_1_bottom(struct spu *spu);
@@ -168,6 +170,22 @@ extern struct spufs_calls {
 	struct module *owner;
 } spufs_calls;
 
+/* return status from spu_run, same as in libspe */
+#define SPE_EVENT_DMA_ALIGNMENT		0x0008	/*A DMA alignment error */
+#define SPE_EVENT_SPE_ERROR		0x0010	/*An illegal instruction error*/
+#define SPE_EVENT_SPE_DATA_SEGMENT	0x0020	/*A DMA segmentation error    */
+#define SPE_EVENT_SPE_DATA_STORAGE	0x0040	/*A DMA storage error */
+#define SPE_EVENT_INVALID_DMA		0x0800	/* Invalid MFC DMA */
+
+/*
+ * Flags for sys_spu_create.
+ */
+#define SPU_CREATE_EVENTS_ENABLED	0x0001
+#define SPU_CREATE_GANG			0x0002
+
+#define SPU_CREATE_FLAG_ALL		0x0003 /* mask of all valid flags */
+
+
 #ifdef CONFIG_SPU_FS_MODULE
 int register_spu_syscalls(struct spufs_calls *calls);
 void unregister_spu_syscalls(struct spufs_calls *calls);
@@ -183,6 +201,24 @@ static inline void unregister_spu_syscalls(struct spufs_calls *calls)
 
 
 /*
+ * Notifier blocks:
+ *
+ * oprofile can get notified when a context switch is performed
+ * on an spe. The notifer function that gets called is passed
+ * a pointer to the SPU structure as well as the object-id that
+ * identifies the binary running on that SPU now.
+ *
+ * For a context save, the object-id that is passed is zero,
+ * identifying that the kernel will run from that moment on.
+ *
+ * For a context restore, the object-id is the value written
+ * to object-id spufs file from user space and the notifer
+ * function can assume that spu->ctx is valid.
+ */
+int spu_switch_event_register(struct notifier_block * n);
+int spu_switch_event_unregister(struct notifier_block * n);
+
+/*
  * This defines the Local Store, Problem Area and Privlege Area of an SPU.
  */