Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (41 commits)
  [IA64] Fix annoying IA64_TR_ALLOC_MAX message.
  [IA64] kill sys32_pipe
  [IA64] remove sys32_pause
  [IA64] Add Variable Page Size and IA64 Support in Intel IOMMU
  ia64/pv_ops: paravirtualized instruction checker.
  ia64/xen: a recipe for using xen/ia64 with pv_ops.
  ia64/pv_ops: update Kconfig for paravirtualized guest and xen.
  ia64/xen: preliminary support for save/restore.
  ia64/xen: define xen machine vector for domU.
  ia64/pv_ops/xen: implement xen pv_time_ops.
  ia64/pv_ops/xen: implement xen pv_irq_ops.
  ia64/pv_ops/xen: define the nubmer of irqs which xen needs.
  ia64/pv_ops/xen: implement xen pv_iosapic_ops.
  ia64/pv_ops/xen: paravirtualize entry.S for ia64/xen.
  ia64/pv_ops/xen: paravirtualize ivt.S for xen.
  ia64/pv_ops/xen: paravirtualize DO_SAVE_MIN for xen.
  ia64/pv_ops/xen: define xen paravirtualized instructions for hand written assembly code
  ia64/pv_ops/xen: define xen pv_cpu_ops.
  ia64/pv_ops/xen: define xen pv_init_ops for various xen initialization.
  ia64/pv_ops/xen: elf note based xen startup.
  ...

79 files changed, 5363 insertions, 185 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 912c57db2d2..27eec71429b 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -23,6 +23,7 @@ config IA64
 	select HAVE_KRETPROBES
 	select HAVE_DMA_ATTRS
 	select HAVE_KVM
+	select HAVE_ARCH_TRACEHOOK
 	default y
 	help
 	  The Itanium Processor Family is Intel's 64-bit successor to
@@ -110,6 +111,33 @@ config AUDIT_ARCH
 	bool
 	default y
 
+menuconfig PARAVIRT_GUEST
+	bool "Paravirtualized guest support"
+	help
+	  Say Y here to get to see options related to running Linux under
+	  various hypervisors.  This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
+
+if PARAVIRT_GUEST
+
+config PARAVIRT
+	bool "Enable paravirtualization code"
+	depends on PARAVIRT_GUEST
+	default y
+	bool
+	default y
+	help
+	  This changes the kernel so it can modify itself when it is run
+	  under a hypervisor, potentially improving performance significantly
+	  over full virtualization.  However, when run without a hypervisor
+	  the kernel is theoretically slower and slightly larger.
+
+
+source "arch/ia64/xen/Kconfig"
+
+endif
+
 choice
 	prompt "System type"
 	default IA64_GENERIC
@@ -119,6 +147,7 @@ config IA64_GENERIC
 	select NUMA
 	select ACPI_NUMA
 	select SWIOTLB
+	select PCI_MSI
 	help
 	  This selects the system type of your hardware.  A "generic" kernel
 	  will run on any supported IA-64 system.  However, if you configure
@@ -126,11 +155,13 @@ config IA64_GENERIC
 
 	  generic		For any supported IA-64 system
 	  DIG-compliant		For DIG ("Developer's Interface Guide") compliant systems
+	  DIG+Intel+IOMMU	For DIG systems with Intel IOMMU
 	  HP-zx1/sx1000		For HP systems
 	  HP-zx1/sx1000+swiotlb	For HP systems with (broken) DMA-constrained devices.
 	  SGI-SN2		For SGI Altix systems
 	  SGI-UV		For SGI UV systems
 	  Ski-simulator		For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
+	  Xen-domU		For xen domU system
 
 	  If you don't know what to do, choose "generic".
 
@@ -138,6 +169,11 @@ config IA64_DIG
 	bool "DIG-compliant"
 	select SWIOTLB
 
+config IA64_DIG_VTD
+	bool "DIG+Intel+IOMMU"
+	select DMAR
+	select PCI_MSI
+
 config IA64_HP_ZX1
 	bool "HP-zx1/sx1000"
 	help
@@ -181,6 +217,10 @@ config IA64_HP_SIM
 	bool "Ski-simulator"
 	select SWIOTLB
 
+config IA64_XEN_GUEST
+	bool "Xen guest"
+	depends on XEN
+
 endchoice
 
 choice
@@ -583,6 +623,16 @@ source "drivers/pci/hotplug/Kconfig"
 
 source "drivers/pcmcia/Kconfig"
 
+config DMAR
+        bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
+        depends on IA64_GENERIC && ACPI && EXPERIMENTAL
+	help
+	  DMA remapping (DMAR) devices support enables independent address
+	  translations for Direct Memory Access (DMA) from devices.
+	  These DMA remapping devices are reported via ACPI tables
+	  and include PCI device scope covered by these DMA
+	  remapping devices.
+
 endmenu
 
 endif
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 905d25b13d5..58a7e46affd 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -53,12 +53,15 @@ libs-y				+= arch/ia64/lib/
 core-y				+= arch/ia64/kernel/ arch/ia64/mm/
 core-$(CONFIG_IA32_SUPPORT)	+= arch/ia64/ia32/
 core-$(CONFIG_IA64_DIG) 	+= arch/ia64/dig/
+core-$(CONFIG_IA64_DIG_VTD) 	+= arch/ia64/dig/
 core-$(CONFIG_IA64_GENERIC) 	+= arch/ia64/dig/
 core-$(CONFIG_IA64_HP_ZX1)	+= arch/ia64/dig/
 core-$(CONFIG_IA64_HP_ZX1_SWIOTLB) += arch/ia64/dig/
+core-$(CONFIG_IA64_XEN_GUEST)	+= arch/ia64/dig/
 core-$(CONFIG_IA64_SGI_SN2)	+= arch/ia64/sn/
 core-$(CONFIG_IA64_SGI_UV)	+= arch/ia64/uv/
 core-$(CONFIG_KVM) 		+= arch/ia64/kvm/
+core-$(CONFIG_XEN)		+= arch/ia64/xen/
 
 drivers-$(CONFIG_PCI)		+= arch/ia64/pci/
 drivers-$(CONFIG_IA64_HP_SIM)	+= arch/ia64/hp/sim/
diff --git a/arch/ia64/configs/generic_defconfig b/arch/ia64/configs/generic_defconfig
index 9f483976228..e05f9e1d3fa 100644
--- a/arch/ia64/configs/generic_defconfig
+++ b/arch/ia64/configs/generic_defconfig
@@ -233,6 +233,8 @@ CONFIG_DMIID=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
 
+# CONFIG_DMAR is not set
+
 #
 # Power management and ACPI
 #
diff --git a/arch/ia64/configs/tiger_defconfig b/arch/ia64/configs/tiger_defconfig
index 797acf9066c..c522edf23c6 100644
--- a/arch/ia64/configs/tiger_defconfig
+++ b/arch/ia64/configs/tiger_defconfig
@@ -172,6 +172,8 @@ CONFIG_DMIID=y
 CONFIG_BINFMT_ELF=y
 CONFIG_BINFMT_MISC=m
 
+# CONFIG_DMAR is not set
+
 #
 # Power management and ACPI
 #
diff --git a/arch/ia64/dig/Makefile b/arch/ia64/dig/Makefile
index 971cd7870dd..5c0283830bd 100644
--- a/arch/ia64/dig/Makefile
+++ b/arch/ia64/dig/Makefile
@@ -6,4 +6,9 @@
 #
 
 obj-y := setup.o
+ifeq ($(CONFIG_DMAR), y)
+obj-$(CONFIG_IA64_GENERIC) += machvec.o machvec_vtd.o dig_vtd_iommu.o
+else
 obj-$(CONFIG_IA64_GENERIC) += machvec.o
+endif
+obj-$(CONFIG_IA64_DIG_VTD) += dig_vtd_iommu.o
diff --git a/arch/ia64/dig/dig_vtd_iommu.c b/arch/ia64/dig/dig_vtd_iommu.c
new file mode 100644
index 00000000000..1c8a079017a
--- /dev/null
+++ b/arch/ia64/dig/dig_vtd_iommu.c
@@ -0,0 +1,59 @@
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/intel-iommu.h>
+
+void *
+vtd_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
+		 gfp_t flags)
+{
+	return intel_alloc_coherent(dev, size, dma_handle, flags);
+}
+EXPORT_SYMBOL_GPL(vtd_alloc_coherent);
+
+void
+vtd_free_coherent(struct device *dev, size_t size, void *vaddr,
+		 dma_addr_t dma_handle)
+{
+	intel_free_coherent(dev, size, vaddr, dma_handle);
+}
+EXPORT_SYMBOL_GPL(vtd_free_coherent);
+
+dma_addr_t
+vtd_map_single_attrs(struct device *dev, void *addr, size_t size,
+		     int dir, struct dma_attrs *attrs)
+{
+	return intel_map_single(dev, (phys_addr_t)addr, size, dir);
+}
+EXPORT_SYMBOL_GPL(vtd_map_single_attrs);
+
+void
+vtd_unmap_single_attrs(struct device *dev, dma_addr_t iova, size_t size,
+		       int dir, struct dma_attrs *attrs)
+{
+	intel_unmap_single(dev, iova, size, dir);
+}
+EXPORT_SYMBOL_GPL(vtd_unmap_single_attrs);
+
+int
+vtd_map_sg_attrs(struct device *dev, struct scatterlist *sglist, int nents,
+		 int dir, struct dma_attrs *attrs)
+{
+	return intel_map_sg(dev, sglist, nents, dir);
+}
+EXPORT_SYMBOL_GPL(vtd_map_sg_attrs);
+
+void
+vtd_unmap_sg_attrs(struct device *dev, struct scatterlist *sglist,
+		   int nents, int dir, struct dma_attrs *attrs)
+{
+	intel_unmap_sg(dev, sglist, nents, dir);
+}
+EXPORT_SYMBOL_GPL(vtd_unmap_sg_attrs);
+
+int
+vtd_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+	return 0;
+}
+EXPORT_SYMBOL_GPL(vtd_dma_mapping_error);
diff --git a/arch/ia64/dig/machvec_vtd.c b/arch/ia64/dig/machvec_vtd.c
new file mode 100644
index 00000000000..7cd3eb471ca
--- /dev/null
+++ b/arch/ia64/dig/machvec_vtd.c
@@ -0,0 +1,3 @@
+#define MACHVEC_PLATFORM_NAME		dig_vtd
+#define MACHVEC_PLATFORM_HEADER		<asm/machvec_dig_vtd.h>
+#include <asm/machvec_init.h>
diff --git a/arch/ia64/ia32/ia32_entry.S b/arch/ia64/ia32/ia32_entry.S
index 53505bb0477..a8cf1995885 100644
--- a/arch/ia64/ia32/ia32_entry.S
+++ b/arch/ia64/ia32/ia32_entry.S
@@ -108,6 +108,11 @@ GLOBAL_ENTRY(ia32_trace_syscall)
 	;;
 	st8 [r2]=r3				// initialize return code to -ENOSYS
 	br.call.sptk.few rp=syscall_trace_enter	// give parent a chance to catch syscall args
+	cmp.lt p6,p0=r8,r0			// check tracehook
+	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp	// r2 = &pt_regs.r8
+	;;
+(p6)	st8.spill [r2]=r8			// store return value in slot for r8
+(p6)	br.spnt.few .ret4
 .ret2:	// Need to reload arguments (they may be changed by the tracing process)
 	adds r2=IA64_PT_REGS_R1_OFFSET+16,sp	// r2 = &pt_regs.r1
 	adds r3=IA64_PT_REGS_R13_OFFSET+16,sp	// r3 = &pt_regs.r13
@@ -199,10 +204,10 @@ ia32_syscall_table:
 	data8 sys_setuid	/* 16-bit version */
 	data8 sys_getuid	/* 16-bit version */
 	data8 compat_sys_stime    /* 25 */
-	data8 sys32_ptrace
+	data8 compat_sys_ptrace
 	data8 sys32_alarm
 	data8 sys_ni_syscall
-	data8 sys32_pause
+	data8 sys_pause
 	data8 compat_sys_utime	  /* 30 */
 	data8 sys_ni_syscall	  /* old stty syscall holder */
 	data8 sys_ni_syscall	  /* old gtty syscall holder */
@@ -215,7 +220,7 @@ ia32_syscall_table:
 	data8 sys_mkdir
 	data8 sys_rmdir		  /* 40 */
 	data8 sys_dup
-	data8 sys32_pipe
+	data8 sys_pipe
 	data8 compat_sys_times
 	data8 sys_ni_syscall	  /* old prof syscall holder */
 	data8 sys32_brk		  /* 45 */
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index f4430bb4bbd..5e92ae00bdb 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -1098,21 +1098,6 @@ sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len,
 	return ret;
 }
 
-asmlinkage long
-sys32_pipe (int __user *fd)
-{
-	int retval;
-	int fds[2];
-
-	retval = do_pipe_flags(fds, 0);
-	if (retval)
-		goto out;
-	if (copy_to_user(fd, fds, sizeof(fds)))
-		retval = -EFAULT;
-  out:
-	return retval;
-}
-
 asmlinkage unsigned long
 sys32_alarm (unsigned int seconds)
 {
@@ -1209,25 +1194,6 @@ sys32_waitpid (int pid, unsigned int *stat_addr, int options)
 	return compat_sys_wait4(pid, stat_addr, options, NULL);
 }
 
-static unsigned int
-ia32_peek (struct task_struct *child, unsigned long addr, unsigned int *val)
-{
-	size_t copied;
-	unsigned int ret;
-
-	copied = access_process_vm(child, addr, val, sizeof(*val), 0);
-	return (copied != sizeof(ret)) ? -EIO : 0;
-}
-
-static unsigned int
-ia32_poke (struct task_struct *child, unsigned long addr, unsigned int val)
-{
-
-	if (access_process_vm(child, addr, &val, sizeof(val), 1) != sizeof(val))
-		return -EIO;
-	return 0;
-}
-
 /*
  *  The order in which registers are stored in the ptrace regs structure
  */
@@ -1525,49 +1491,15 @@ restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __u
 	return 0;
 }
 
-asmlinkage long
-sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+	compat_ulong_t caddr, compat_ulong_t cdata)
 {
-	struct task_struct *child;
-	unsigned int value, tmp;
+	unsigned long addr = caddr;
+	unsigned long data = cdata;
+	unsigned int tmp;
 	long i, ret;
 
-	lock_kernel();
-	if (request == PTRACE_TRACEME) {
-		ret = ptrace_traceme();
-		goto out;
-	}
-
-	child = ptrace_get_task_struct(pid);
-	if (IS_ERR(child)) {
-		ret = PTR_ERR(child);
-		goto out;
-	}
-
-	if (request == PTRACE_ATTACH) {
-		ret = sys_ptrace(request, pid, addr, data);
-		goto out_tsk;
-	}
-
-	ret = ptrace_check_attach(child, request == PTRACE_KILL);
-	if (ret < 0)
-		goto out_tsk;
-
 	switch (request) {
-	      case PTRACE_PEEKTEXT:
-	      case PTRACE_PEEKDATA:	/* read word at location addr */
-		ret = ia32_peek(child, addr, &value);
-		if (ret == 0)
-			ret = put_user(value, (unsigned int __user *) compat_ptr(data));
-		else
-			ret = -EIO;
-		goto out_tsk;
-
-	      case PTRACE_POKETEXT:
-	      case PTRACE_POKEDATA:	/* write the word at location addr */
-		ret = ia32_poke(child, addr, data);
-		goto out_tsk;
-
 	      case PTRACE_PEEKUSR:	/* read word at addr in USER area */
 		ret = -EIO;
 		if ((addr & 3) || addr > 17*sizeof(int))
@@ -1632,27 +1564,9 @@ sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
 					    compat_ptr(data));
 		break;
 
-	      case PTRACE_GETEVENTMSG:   
-		ret = put_user(child->ptrace_message, (unsigned int __user *) compat_ptr(data));
-		break;
-
-	      case PTRACE_SYSCALL:	/* continue, stop after next syscall */
-	      case PTRACE_CONT:		/* restart after signal. */
-	      case PTRACE_KILL:
-	      case PTRACE_SINGLESTEP:	/* execute chile for one instruction */
-	      case PTRACE_DETACH:	/* detach a process */
-		ret = sys_ptrace(request, pid, addr, data);
-		break;
-
 	      default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-
+		return compat_ptrace_request(child, request, caddr, cdata);
 	}
-  out_tsk:
-	put_task_struct(child);
-  out:
-	unlock_kernel();
 	return ret;
 }
 
@@ -1704,14 +1618,6 @@ out:
 }
 
 asmlinkage int
-sys32_pause (void)
-{
-	current->state = TASK_INTERRUPTIBLE;
-	schedule();
-	return -ERESTARTNOHAND;
-}
-
-asmlinkage int
 sys32_msync (unsigned int start, unsigned int len, int flags)
 {
 	unsigned int addr;
diff --git a/arch/ia64/include/asm/break.h b/arch/ia64/include/asm/break.h
index f0340203989..e90c40ec9ed 100644
--- a/arch/ia64/include/asm/break.h
+++ b/arch/ia64/include/asm/break.h
@@ -20,4 +20,13 @@
  */
 #define __IA64_BREAK_SYSCALL		0x100000
 
+/*
+ * Xen specific break numbers:
+ */
+#define __IA64_XEN_HYPERCALL		0x1000
+/* [__IA64_XEN_HYPERPRIVOP_START, __IA64_XEN_HYPERPRIVOP_MAX] is used
+   for xen hyperprivops */
+#define __IA64_XEN_HYPERPRIVOP_START	0x1