qubes-linux-kernel/patches.xen/xen3-patch-2.6.21

From: www.kernel.org
Subject: Linux 2.6.21
Patch-mainline: 2.6.21

Automatically created from "patches.kernel.org/patch-2.6.21" by xen-port-patches.py

Acked-by: jbeulich@novell.com

--- head-2010-04-29.orig/arch/x86/Kconfig	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/Kconfig	2010-03-24 15:09:08.000000000 +0100
@@ -76,13 +76,15 @@ config GENERIC_CMOS_UPDATE
 
 config CLOCKSOURCE_WATCHDOG
 	def_bool y
+	depends on !X86_XEN
 
 config GENERIC_CLOCKEVENTS
 	def_bool y
+	depends on !X86_XEN
 
 config GENERIC_CLOCKEVENTS_BROADCAST
 	def_bool y
-	depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
+	depends on X86_64 || (X86_32 && X86_LOCAL_APIC && !X86_XEN)
 
 config LOCKDEP_SUPPORT
 	def_bool y
--- head-2010-04-29.orig/arch/x86/kernel/Makefile	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/Makefile	2010-03-24 15:09:08.000000000 +0100
@@ -138,7 +138,7 @@ ifeq ($(CONFIG_X86_64),y)
 	pci-dma_64-$(CONFIG_XEN)	+= pci-dma_32.o
 endif
 
-disabled-obj-$(CONFIG_XEN) := early-quirks.o i8253.o i8259_$(BITS).o reboot.o \
-	smpboot_$(BITS).o tsc_$(BITS).o
+disabled-obj-$(CONFIG_XEN) := early-quirks.o hpet.o i8253.o i8259_$(BITS).o reboot.o \
+	smpboot_$(BITS).o tsc_$(BITS).o tsc_sync.o
 disabled-obj-$(CONFIG_XEN_UNPRIVILEGED_GUEST) += mpparse_64.o
 %/head_$(BITS).o %/head_$(BITS).s: $(if $(CONFIG_XEN),EXTRA_AFLAGS,dummy) :=
--- head-2010-04-29.orig/arch/x86/kernel/apic/apic-xen.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/apic/apic-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -25,6 +25,8 @@
 #include <linux/kernel_stat.h>
 #include <linux/sysdev.h>
 #include <linux/cpu.h>
+#include <linux/clockchips.h>
+#include <linux/acpi_pmtmr.h>
 #include <linux/module.h>
 
 #include <asm/atomic.h>
@@ -56,83 +58,26 @@ static cpumask_t timer_bcast_ipi;
  */
 
 /*
- * Debug level
+ * Debug level, exported for io_apic.c
  */
 int apic_verbosity;
 
 #ifndef CONFIG_XEN
 static int modern_apic(void)
 {
-	unsigned int lvr, version;
 	/* AMD systems use old APIC versions, so check the CPU */
 	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
-		boot_cpu_data.x86 >= 0xf)
+	    boot_cpu_data.x86 >= 0xf)
 		return 1;
-	lvr = apic_read(APIC_LVR);
-	version = GET_APIC_VERSION(lvr);
-	return version >= 0x14;
+	return lapic_get_version() >= 0x14;
 }
 #endif /* !CONFIG_XEN */
 
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
-	printk("unexpected IRQ trap at vector %02x\n", irq);
-	/*
-	 * Currently unexpected vectors happen only on SMP and APIC.
-	 * We _must_ ack these because every local APIC has only N
-	 * irq slots per priority level, and a 'hanging, unacked' IRQ
-	 * holds up an irq slot - in excessive cases (when multiple
-	 * unexpected vectors occur) that might lock up the APIC
-	 * completely.
-	 * But only ack when the APIC is enabled -AK
-	 */
-	if (cpu_has_apic)
-		ack_APIC_irq();
-}
-
 int get_physical_broadcast(void)
 {
         return 0xff;
 }
 
-#ifndef CONFIG_XEN
-#ifndef CONFIG_SMP
-static void up_apic_timer_interrupt_call(void)
-{
-	int cpu = smp_processor_id();
-
-	/*
-	 * the NMI deadlock-detector uses this.
-	 */
-	per_cpu(irq_stat, cpu).apic_timer_irqs++;
-
-	smp_local_timer_interrupt();
-}
-#endif
-
-void smp_send_timer_broadcast_ipi(void)
-{
-	cpumask_t mask;
-
-	cpus_and(mask, cpu_online_map, timer_bcast_ipi);
-	if (!cpus_empty(mask)) {
-#ifdef CONFIG_SMP
-		send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
-#else
-		/*
-		 * We can directly call the apic timer interrupt handler
-		 * in UP case. Minus all irq related functions
-		 */
-		up_apic_timer_interrupt_call();
-#endif
-	}
-}
-#endif
-
 int setup_profiling_timer(unsigned int multiplier)
 {
 	return -EINVAL;
--- head-2010-04-29.orig/arch/x86/kernel/cpu/common-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/cpu/common-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -612,7 +612,7 @@ void __init early_cpu_init(void)
 struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
 {
 	memset(regs, 0, sizeof(struct pt_regs));
-	regs->xgs = __KERNEL_PDA;
+	regs->xfs = __KERNEL_PDA;
 	return regs;
 }
 
@@ -669,12 +669,12 @@ struct i386_pda boot_pda = {
 	.pcurrent = &init_task,
 };
 
-static inline void set_kernel_gs(void)
+static inline void set_kernel_fs(void)
 {
-	/* Set %gs for this CPU's PDA.  Memory clobber is to create a
+	/* Set %fs for this CPU's PDA.  Memory clobber is to create a
 	   barrier with respect to any PDA operations, so the compiler
 	   doesn't move any before here. */
-	asm volatile ("mov %0, %%gs" : : "r" (__KERNEL_PDA) : "memory");
+	asm volatile ("mov %0, %%fs" : : "r" (__KERNEL_PDA) : "memory");
 }
 
 /* Initialize the CPU's GDT and PDA.  The boot CPU does this for
@@ -732,7 +732,7 @@ void __cpuinit cpu_set_gdt(int cpu)
 	}
 	BUG_ON(HYPERVISOR_set_gdt(frames, (cpu_gdt_descr->size + 1) / 8));
 
-	set_kernel_gs();
+	set_kernel_fs();
 }
 
 /* Common CPU init for both boot and secondary CPUs */
@@ -777,8 +777,8 @@ static void __cpuinit _cpu_init(int cpu,
 	__set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);
 #endif
 
-	/* Clear %fs. */
-	asm volatile ("mov %0, %%fs" : : "r" (0));
+	/* Clear %gs. */
+	asm volatile ("mov %0, %%gs" : : "r" (0));
 
 	/* Clear all 6 debug registers: */
 	set_debugreg(0, 0);
--- head-2010-04-29.orig/arch/x86/kernel/e820_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/e820_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -14,6 +14,7 @@
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/e820.h>
+#include <asm/setup.h>
 #include <xen/interface/memory.h>
 
 #ifdef CONFIG_EFI
@@ -157,21 +158,22 @@ static struct resource standard_io_resou
 	.flags	= IORESOURCE_BUSY | IORESOURCE_IO
 } };
 
-static int romsignature(const unsigned char *x)
+#define ROMSIGNATURE 0xaa55
+
+static int __init romsignature(const unsigned char *rom)
 {
 	unsigned short sig;
-	int ret = 0;
-	if (probe_kernel_address((const unsigned short *)x, sig) == 0)
-		ret = (sig == 0xaa55);
-	return ret;
+
+	return probe_kernel_address((const unsigned short *)rom, sig) == 0 &&
+	       sig == ROMSIGNATURE;
 }
 
 static int __init romchecksum(unsigned char *rom, unsigned long length)
 {
-	unsigned char *p, sum = 0;
+	unsigned char sum;
 
-	for (p = rom; p < rom + length; p++)
-		sum += *p;
+	for (sum = 0; length; length--)
+		sum += *rom++;
 	return sum == 0;
 }
 
--- head-2010-04-29.orig/arch/x86/kernel/entry_32-xen.S	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/entry_32-xen.S	2010-03-24 15:09:08.000000000 +0100
@@ -30,7 +30,7 @@
  *	18(%esp) - %eax
  *	1C(%esp) - %ds
  *	20(%esp) - %es
- *	24(%esp) - %gs
+ *	24(%esp) - %fs
  *	28(%esp) - orig_eax
  *	2C(%esp) - %eip
  *	30(%esp) - %cs
@@ -102,9 +102,9 @@ NMI_MASK	= 0x80000000
 
 #define SAVE_ALL \
 	cld; \
-	pushl %gs; \
+	pushl %fs; \
 	CFI_ADJUST_CFA_OFFSET 4;\
-	/*CFI_REL_OFFSET gs, 0;*/\
+	/*CFI_REL_OFFSET fs, 0;*/\
 	pushl %es; \
 	CFI_ADJUST_CFA_OFFSET 4;\
 	/*CFI_REL_OFFSET es, 0;*/\
@@ -136,7 +136,7 @@ NMI_MASK	= 0x80000000
 	movl %edx, %ds; \
 	movl %edx, %es; \
 	movl $(__KERNEL_PDA), %edx; \
-	movl %edx, %gs
+	movl %edx, %fs
 
 #define RESTORE_INT_REGS \
 	popl %ebx;	\
@@ -169,9 +169,9 @@ NMI_MASK	= 0x80000000
 2:	popl %es;	\
 	CFI_ADJUST_CFA_OFFSET -4;\
 	/*CFI_RESTORE es;*/\
-3:	popl %gs;	\
+3:	popl %fs;	\
 	CFI_ADJUST_CFA_OFFSET -4;\
-	/*CFI_RESTORE gs;*/\
+	/*CFI_RESTORE fs;*/\
 .pushsection .fixup,"ax";	\
 4:	movl $0,(%esp);	\
 	jmp 1b;		\
@@ -230,6 +230,7 @@ ENTRY(ret_from_fork)
 	CFI_ADJUST_CFA_OFFSET -4
 	jmp syscall_exit
 	CFI_ENDPROC
+END(ret_from_fork)
 
 /*
  * Return to user mode is not as complex as all this looks,
@@ -261,6 +262,7 @@ ENTRY(resume_userspace)
 					# int/exception return?
 	jne work_pending
 	jmp restore_all
+END(ret_from_exception)
 
 #ifdef CONFIG_PREEMPT
 ENTRY(resume_kernel)
@@ -275,6 +277,7 @@ need_resched:
 	jz restore_all
 	call preempt_schedule_irq
 	jmp need_resched
+END(resume_kernel)
 #endif
 	CFI_ENDPROC
 
@@ -352,16 +355,17 @@ sysenter_past_esp:
 	movl PT_OLDESP(%esp), %ecx
 	xorl %ebp,%ebp
 	TRACE_IRQS_ON
-1:	mov  PT_GS(%esp), %gs
+1:	mov  PT_FS(%esp), %fs
 	ENABLE_INTERRUPTS_SYSEXIT
 	CFI_ENDPROC
 .pushsection .fixup,"ax"
-2:	movl $0,PT_GS(%esp)
+2:	movl $0,PT_FS(%esp)
 	jmp 1b
 .section __ex_table,"a"
 	.align 4
 	.long 1b,2b
 .popsection
+ENDPROC(sysenter_entry)
 
 	# pv sysenter call handler stub
 ENTRY(sysenter_entry_pv)
@@ -533,6 +537,7 @@ hypervisor_iret:
 	jmp  hypercall_page + (__HYPERVISOR_iret * 32)
 #endif
 	CFI_ENDPROC
+ENDPROC(system_call)
 
 	# perform work that needs to be done immediately before resumption
 	ALIGN
@@ -578,6 +583,7 @@ work_notifysig_v86:
 	xorl %edx, %edx
 	call do_notify_resume
 	jmp resume_userspace_sig
+END(work_pending)
 
 	# perform syscall exit tracing
 	ALIGN
@@ -593,6 +599,7 @@ syscall_trace_entry:
 	cmpl $(nr_syscalls), %eax
 	jnae syscall_call
 	jmp syscall_exit
+END(syscall_trace_entry)
 
 	# perform syscall exit tracing
 	ALIGN
@@ -606,6 +613,7 @@ syscall_exit_work:
 	movl $1, %edx
 	call do_syscall_trace
 	jmp resume_userspace
+END(syscall_exit_work)
 	CFI_ENDPROC
 
 	RING0_INT_FRAME			# can't unwind into user space anyway
@@ -616,16 +624,18 @@ syscall_fault:
 	GET_THREAD_INFO(%ebp)
 	movl $-EFAULT,PT_EAX(%esp)
 	jmp resume_userspace
+END(syscall_fault)
 
 syscall_badsys:
 	movl $-ENOSYS,PT_EAX(%esp)
 	jmp resume_userspace
+END(syscall_badsys)
 	CFI_ENDPROC
 
 #ifndef CONFIG_XEN
 #define FIXUP_ESPFIX_STACK \
 	/* since we are on a wrong stack, we cant make it a C code :( */ \
-	movl %gs:PDA_cpu, %ebx; \
+	movl %fs:PDA_cpu, %ebx; \
 	PER_CPU(cpu_gdt_descr, %ebx); \
 	movl GDS_address(%ebx), %ebx; \
 	GET_DESC_BASE(GDT_ENTRY_ESPFIX_SS, %ebx, %eax, %ax, %al, %ah); \
@@ -656,9 +666,9 @@ syscall_badsys:
 ENTRY(interrupt)
 .text
 
-vector=0
 ENTRY(irq_entries_start)
 	RING0_INT_FRAME
+vector=0
 .rept NR_IRQS
 	ALIGN
  .if vector
@@ -667,11 +677,16 @@ ENTRY(irq_entries_start)
 1:	pushl $~(vector)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp common_interrupt
-.data
+ .previous
 	.long 1b
-.text
+ .text
 vector=vector+1
 .endr
+END(irq_entries_start)
+
+.previous
+END(interrupt)
+.previous
 
 /*
  * the CPU automatically disables interrupts when executing an IRQ vector,
@@ -684,6 +699,7 @@ common_interrupt:
 	movl %esp,%eax
 	call do_IRQ
 	jmp ret_from_intr
+ENDPROC(common_interrupt)
 	CFI_ENDPROC
 
 #define BUILD_INTERRUPT(name, nr)	\
@@ -696,10 +712,16 @@ ENTRY(name)				\
 	movl %esp,%eax;			\
 	call smp_/**/name;		\
 	jmp ret_from_intr;		\
-	CFI_ENDPROC
+	CFI_ENDPROC;			\
+ENDPROC(name)
 
 /* The include is where all of the SMP etc. interrupts come from */
 #include "entry_arch.h"
+
+/* This alternate entry is needed because we hijack the apic LVTT */
+#if defined(CONFIG_VMI) && defined(CONFIG_X86_LOCAL_APIC)
+BUILD_INTERRUPT(apic_vmi_timer_interrupt,LOCAL_TIMER_VECTOR)
+#endif
 #else
 #define UNWIND_ESPFIX_STACK
 #endif
@@ -710,7 +732,7 @@ KPROBE_ENTRY(page_fault)
 	CFI_ADJUST_CFA_OFFSET 4
 	ALIGN
 error_code:
-	/* the function address is in %gs's slot on the stack */
+	/* the function address is in %fs's slot on the stack */
 	pushl %es
 	CFI_ADJUST_CFA_OFFSET 4
 	/*CFI_REL_OFFSET es, 0*/
@@ -739,20 +761,20 @@ error_code:
 	CFI_ADJUST_CFA_OFFSET 4
 	CFI_REL_OFFSET ebx, 0
 	cld
-	pushl %gs
+	pushl %fs
 	CFI_ADJUST_CFA_OFFSET 4
-	/*CFI_REL_OFFSET gs, 0*/
+	/*CFI_REL_OFFSET fs, 0*/
 	movl $(__KERNEL_PDA), %ecx
-	movl %ecx, %gs
+	movl %ecx, %fs
 	UNWIND_ESPFIX_STACK
 	popl %ecx
 	CFI_ADJUST_CFA_OFFSET -4
 	/*CFI_REGISTER es, ecx*/
-	movl PT_GS(%esp), %edi		# get the function address
+	movl PT_FS(%esp), %edi		# get the function address
 	movl PT_ORIG_EAX(%esp), %edx	# get the error code
 	movl $-1, PT_ORIG_EAX(%esp)	# no syscall to restart
-	mov  %ecx, PT_GS(%esp)
-	/*CFI_REL_OFFSET gs, ES*/
+	mov  %ecx, PT_FS(%esp)
+	/*CFI_REL_OFFSET fs, ES*/
 	movl $(__USER_DS), %ecx
 	movl %ecx, %ds
 	movl %ecx, %es
@@ -844,7 +866,7 @@ critical_fixup_table:
 	.byte 6				# pop  %eax
 	.byte 7				# pop  %ds
 	.byte 8				# pop  %es
-	.byte 9,9			# pop  %gs
+	.byte 9,9			# pop  %fs
 	.byte 10,10,10			# add  $4,%esp
 	.byte 11			# iret
 	.byte -1,-1,-1,-1		# movb $1,1(%esi) = __DISABLE_INTERRUPTS
@@ -909,6 +931,7 @@ ENTRY(coprocessor_error)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(coprocessor_error)
 
 ENTRY(simd_coprocessor_error)
 	RING0_INT_FRAME
@@ -918,6 +941,7 @@ ENTRY(simd_coprocessor_error)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(simd_coprocessor_error)
 
 ENTRY(device_not_available)
 	RING0_INT_FRAME
@@ -940,6 +964,7 @@ device_available_emulate:
 	call math_state_restore
 	jmp ret_from_exception
 	CFI_ENDPROC
+END(device_not_available)
 
 #ifndef CONFIG_XEN
 /*
@@ -1101,10 +1126,12 @@ ENTRY(native_iret)
 	.align 4
 	.long 1b,iret_exc
 .previous
+END(native_iret)
 
 ENTRY(native_irq_enable_sysexit)
 	sti
 	sysexit
+END(native_irq_enable_sysexit)
 #endif
 
 KPROBE_ENTRY(int3)
@@ -1127,6 +1154,7 @@ ENTRY(overflow)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(overflow)
 
 ENTRY(bounds)
 	RING0_INT_FRAME
@@ -1136,6 +1164,7 @@ ENTRY(bounds)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(bounds)
 
 ENTRY(invalid_op)
 	RING0_INT_FRAME
@@ -1145,6 +1174,7 @@ ENTRY(invalid_op)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(invalid_op)
 
 ENTRY(coprocessor_segment_overrun)
 	RING0_INT_FRAME
@@ -1154,6 +1184,7 @@ ENTRY(coprocessor_segment_overrun)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(coprocessor_segment_overrun)
 
 ENTRY(invalid_TSS)
 	RING0_EC_FRAME
@@ -1161,6 +1192,7 @@ ENTRY(invalid_TSS)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(invalid_TSS)
 
 ENTRY(segment_not_present)
 	RING0_EC_FRAME
@@ -1168,6 +1200,7 @@ ENTRY(segment_not_present)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(segment_not_present)
 
 ENTRY(stack_segment)
 	RING0_EC_FRAME
@@ -1175,6 +1208,7 @@ ENTRY(stack_segment)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(stack_segment)
 
 KPROBE_ENTRY(general_protection)
 	RING0_EC_FRAME
@@ -1190,6 +1224,7 @@ ENTRY(alignment_check)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(alignment_check)
 
 ENTRY(divide_error)
 	RING0_INT_FRAME
@@ -1199,6 +1234,7 @@ ENTRY(divide_error)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(divide_error)
 
 #ifdef CONFIG_X86_MCE
 ENTRY(machine_check)
@@ -1209,6 +1245,7 @@ ENTRY(machine_check)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(machine_check)
 #endif
 
 #ifndef CONFIG_XEN
@@ -1228,6 +1265,7 @@ ENTRY(fixup_4gb_segment)
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
+END(spurious_interrupt_bug)
 
 ENTRY(kernel_thread_helper)
 	pushl $0		# fake return address for unwinder
--- head-2010-04-29.orig/arch/x86/kernel/head_32-xen.S	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/head_32-xen.S	2010-03-24 15:09:08.000000000 +0100
@@ -27,6 +27,7 @@
 #define X86_CAPABILITY	new_cpu_data+CPUINFO_x86_capability
 #define X86_VENDOR_ID	new_cpu_data+CPUINFO_x86_vendor_id
 
+.section .text.head,"ax",@progbits
 #define VIRT_ENTRY_OFFSET 0x0
 .org VIRT_ENTRY_OFFSET
 ENTRY(startup_32)
@@ -60,11 +61,11 @@ ENTRY(startup_32)
 
 	movb $1,X86_HARD_MATH
 
-	xorl %eax,%eax			# Clear FS
-	movl %eax,%fs
+	xorl %eax,%eax		# Clear GS
+	movl %eax,%gs
 
 	movl $(__KERNEL_PDA),%eax
-	mov  %eax,%gs
+	mov  %eax,%fs
 
 	cld			# gcc2 wants the direction flag cleared at all times
 
@@ -75,7 +76,7 @@ ENTRY(startup_32)
  * Point the GDT at this CPU's PDA.  This will be
  * cpu_gdt_table and boot_pda.
  */
-setup_pda:
+ENTRY(setup_pda)
 	/* get the PDA pointer */
 	movl $boot_pda, %eax
 
--- head-2010-04-29.orig/arch/x86/kernel/io_apic_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/io_apic_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -167,7 +167,7 @@ static inline void io_apic_write(unsigne
  */
 static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
 {
-	volatile struct io_apic *io_apic = io_apic_base(apic);
+	volatile struct io_apic __iomem *io_apic = io_apic_base(apic);
 	if (sis_apic_bug)
 		writel(reg, &io_apic->index);
 	writel(value, &io_apic->data);
@@ -392,7 +392,7 @@ static void set_ioapic_affinity_irq(unsi
 			break;
 		entry = irq_2_pin + entry->next;
 	}
-	set_native_irq_info(irq, cpumask);
+	irq_desc[irq].affinity = cpumask;
 	spin_unlock_irqrestore(&ioapic_lock, flags);
 }
 
@@ -531,8 +531,8 @@ static void do_irq_balance(void)
 		package_index = CPU_TO_PACKAGEINDEX(i);
 		for (j = 0; j < NR_IRQS; j++) {
 			unsigned long value_now, delta;
-			/* Is this an active IRQ? */
-			if (!irq_desc[j].action)
+			/* Is this an active IRQ or balancing disabled ? */
+			if (!irq_desc[j].action || irq_balancing_disabled(j))
 				continue;
 			if ( package_index == i )
 				IRQ_DELTA(package_index,j) = 0;
@@ -785,7 +785,7 @@ failed:
 	return 0;
 }
 
-int __init irqbalance_disable(char *str)
+int __devinit irqbalance_disable(char *str)
 {
 	irqbalance_disabled = 1;
 	return 1;
@@ -1329,11 +1329,9 @@ static void ioapic_register_intr(int irq
 			trigger == IOAPIC_LEVEL)
 		set_irq_chip_and_handler_name(irq, &ioapic_chip,
 					 handle_fasteoi_irq, "fasteoi");
-	else {
-		irq_desc[irq].status |= IRQ_DELAYED_DISABLE;
+	else
 		set_irq_chip_and_handler_name(irq, &ioapic_chip,
 					 handle_edge_irq, "edge");
-	}
 	set_intr_gate(vector, interrupt[irq]);
 }
 #else
@@ -1407,7 +1405,6 @@ static void __init setup_IO_APIC_irqs(vo
 		}
 		spin_lock_irqsave(&ioapic_lock, flags);
 		__ioapic_write_entry(apic, pin, entry);
-		set_native_irq_info(irq, TARGET_CPUS);
 		spin_unlock_irqrestore(&ioapic_lock, flags);
 	}
 	}
@@ -1638,7 +1635,7 @@ void /*__init*/ print_local_APIC(void * 
 	v = apic_read(APIC_LVR);
 	printk(KERN_INFO "... APIC VERSION: %08x\n", v);
 	ver = GET_APIC_VERSION(v);
-	maxlvt = get_maxlvt();
+	maxlvt = lapic_get_maxlvt();
 
 	v = apic_read(APIC_TASKPRI);
 	printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
@@ -1976,7 +1973,7 @@ static void __init setup_ioapic_ids_from
 #endif
 
 #ifndef CONFIG_XEN
-static int no_timer_check __initdata;
+int no_timer_check __initdata;
 
 static int __init notimercheck(char *s)
 {
@@ -2369,7 +2366,7 @@ static inline void __init check_timer(vo
 
 	disable_8259A_irq(0);
 	set_irq_chip_and_handler_name(0, &lapic_chip, handle_fasteoi_irq,
-				      "fasteio");
+				      "fasteoi");
 	apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector);	/* Fixed mode */
 	enable_8259A_irq(0);
 
@@ -2662,7 +2659,7 @@ static void set_msi_irq_affinity(unsigne
 	msg.address_lo |= MSI_ADDR_DEST_ID(dest);
 
 	write_msi_msg(irq, &msg);
-	set_native_irq_info(irq, mask);
+	irq_desc[irq].affinity = mask;
 }
 #endif /* CONFIG_SMP */
 
@@ -2681,25 +2678,32 @@ static struct irq_chip msi_chip = {
 	.retrigger	= ioapic_retrigger_irq,
 };
 
-int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev)
+int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 {
 	struct msi_msg msg;
-	int ret;
+	int irq, ret;
+	irq = create_irq();
+	if (irq < 0)
+		return irq;
+
+	set_irq_msi(irq, desc);
 	ret = msi_compose_msg(dev, irq, &msg);
-	if (ret < 0)
+	if (ret < 0) {
+		destroy_irq(irq);
 		return ret;
+	}
 
 	write_msi_msg(irq, &msg);
 
 	set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq,
 				      "edge");
 
-	return 0;
+	return irq;
 }
 
 void arch_teardown_msi_irq(unsigned int irq)
 {
-	return;
+	destroy_irq(irq);
 }
 
 #endif /* CONFIG_PCI_MSI */
@@ -2739,7 +2743,7 @@ static void set_ht_irq_affinity(unsigned
 	dest = cpu_mask_to_apicid(mask);
 
 	target_ht_irq(irq, dest);
-	set_native_irq_info(irq, mask);
+	irq_desc[irq].affinity = mask;
 }
 #endif
 
@@ -2947,7 +2951,6 @@ int io_apic_set_pci_routing (int ioapic,
 
 	spin_lock_irqsave(&ioapic_lock, flags);
 	__ioapic_write_entry(ioapic, pin, entry);
-	set_native_irq_info(irq, TARGET_CPUS);
 	spin_unlock_irqrestore(&ioapic_lock, flags);
 
 	return 0;
--- head-2010-04-29.orig/arch/x86/kernel/microcode-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/microcode-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -108,7 +108,7 @@ static ssize_t microcode_write (struct f
 	return ret;
 }
 
-static struct file_operations microcode_fops = {
+static const struct file_operations microcode_fops = {
 	.owner		= THIS_MODULE,
 	.write		= microcode_write,
 	.open		= microcode_open,
--- head-2010-04-29.orig/arch/x86/kernel/mpparse_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/mpparse_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -1079,7 +1079,7 @@ int mp_register_gsi(u32 gsi, int trigger
 	static int		gsi_to_irq[MAX_GSI_NUM];
 
 	/* Don't set up the ACPI SCI because it's already set up */
-	if (acpi_fadt.sci_int == gsi)
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
 		return gsi;
 
 	ioapic = mp_find_ioapic(gsi);
@@ -1136,7 +1136,7 @@ int mp_register_gsi(u32 gsi, int trigger
 			/*
 			 * Don't assign IRQ used by ACPI SCI
 			 */
-			if (gsi == acpi_fadt.sci_int)
+			if (gsi == acpi_gbl_FADT.sci_interrupt)
 				gsi = pci_irq++;
 			gsi_to_irq[irq] = gsi;
 		} else {
--- head-2010-04-29.orig/arch/x86/kernel/pci-dma-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/pci-dma-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -308,7 +308,7 @@ int dma_declare_coherent_memory(struct d
 	return DMA_MEMORY_IO;
 
  free1_out:
-	kfree(dev->dma_mem->bitmap);
+	kfree(dev->dma_mem);
  out:
 	if (mem_base)
 		iounmap(mem_base);
--- head-2010-04-29.orig/arch/x86/kernel/pcspeaker.c	2010-04-29 09:29:50.000000000 +0200
+++ head-2010-04-29/arch/x86/kernel/pcspeaker.c	2010-03-24 15:09:08.000000000 +0100
@@ -6,6 +6,11 @@ static __init int add_pcspkr(void)
 {
 	struct platform_device *pd;
 
+#ifdef CONFIG_XEN
+	if (!is_initial_xendomain())
+		return 0;
+#endif
+
 	pd = platform_device_register_simple("pcspkr", -1, NULL, 0);
 
 	return IS_ERR(pd) ? PTR_ERR(pd) : 0;
--- head-2010-04-29.orig/arch/x86/kernel/process_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/process_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -38,6 +38,7 @@
 #include <linux/ptrace.h>
 #include <linux/random.h>
 #include <linux/personality.h>
+#include <linux/tick.h>
 
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -160,6 +161,7 @@ void cpu_idle(void)
 
 	/* endless idle loop with no priority at all */
 	while (1) {
+		tick_nohz_stop_sched_tick();
 		while (!need_resched()) {
 			void (*idle)(void);
 
@@ -175,6 +177,7 @@ void cpu_idle(void)
 			__get_cpu_var(irq_stat).idle_timestamp = jiffies;
 			idle();
 		}
+		tick_nohz_restart_sched_tick();
 		preempt_enable_no_resched();
 		schedule();
 		preempt_disable();
@@ -247,8 +250,8 @@ void show_regs(struct pt_regs * regs)
 		regs->eax,regs->ebx,regs->ecx,regs->edx);
 	printk("ESI: %08lx EDI: %08lx EBP: %08lx",
 		regs->esi, regs->edi, regs->ebp);
-	printk(" DS: %04x ES: %04x GS: %04x\n",
-	       0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xgs);
+	printk(" DS: %04x ES: %04x FS: %04x\n",
+	       0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xfs);
 
 	cr0 = read_cr0();
 	cr2 = read_cr2();
@@ -279,7 +282,7 @@ int kernel_thread(int (*fn)(void *), voi
 
 	regs.xds = __USER_DS;
 	regs.xes = __USER_DS;
-	regs.xgs = __KERNEL_PDA;
+	regs.xfs = __KERNEL_PDA;
 	regs.orig_eax = -1;
 	regs.eip = (unsigned long) kernel_thread_helper;
 	regs.xcs = __KERNEL_CS | get_kernel_rpl();
@@ -356,7 +359,7 @@ int copy_thread(int nr, unsigned long cl
 
 	p->thread.eip = (unsigned long) ret_from_fork;
 
-	savesegment(fs,p->thread.fs);
+	savesegment(gs,p->thread.gs);
 
 	tsk = current;
 	if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
@@ -434,8 +437,8 @@ void dump_thread(struct pt_regs * regs, 
 	dump->regs.eax = regs->eax;
 	dump->regs.ds = regs->xds;
 	dump->regs.es = regs->xes;
-	savesegment(fs,dump->regs.fs);
-	dump->regs.gs = regs->xgs;
+	dump->regs.fs = regs->xfs;
+	savesegment(gs,dump->regs.gs);
 	dump->regs.orig_eax = regs->orig_eax;
 	dump->regs.eip = regs->eip;
 	dump->regs.cs = regs->xcs;
@@ -637,16 +640,6 @@ struct task_struct fastcall * __switch_t
 		prefetch(&next->i387.fxsave);
 
 	/*
-	 * Restore %fs if needed.
-	 *
-	 * Glibc normally makes %fs be zero.
-	 */
-	if (unlikely(next->fs))
-		loadsegment(fs, next->fs);
-
-	write_pda(pcurrent, next_p);
-
-	/*
 	 * Now maybe handle debug registers
 	 */
 	if (unlikely(task_thread_info(next_p)->flags & _TIF_WORK_CTXSW))
@@ -654,6 +647,15 @@ struct task_struct fastcall * __switch_t
 
 	disable_tsc(prev_p, next_p);
 
+	/*
+	 * Leave lazy mode, flushing any hypercalls made here.
+	 * This must be done before restoring TLS segments so
+	 * the GDT and LDT are properly updated, and must be
+	 * done before math_state_restore, so the TS bit is up
+	 * to date.
+	 */
+	arch_leave_lazy_cpu_mode();
+
 	/* If the task has used fpu the last 5 timeslices, just do a full
 	 * restore of the math state immediately to avoid the trap; the
 	 * chances of needing FPU soon are obviously high now
@@ -661,6 +663,14 @@ struct task_struct fastcall * __switch_t
 	if (next_p->fpu_counter > 5)
 		math_state_restore();
 
+	/*
+	 * Restore %gs if needed (which is common)
+	 */
+	if (prev->gs | next->gs)
+		loadsegment(gs, next->gs);
+
+	write_pda(pcurrent, next_p);
+
 	return prev_p;
 }
 
--- head-2010-04-29.orig/arch/x86/kernel/setup_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/setup_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -33,7 +33,6 @@
 #include <linux/initrd.h>
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
-#include <linux/platform_device.h>
 #include <linux/console.h>
 #include <linux/mca.h>
 #include <linux/root_dev.h>
@@ -148,7 +147,7 @@ unsigned long saved_videomode;
 #define RAMDISK_PROMPT_FLAG		0x8000
 #define RAMDISK_LOAD_FLAG		0x4000	
 
-static char command_line[COMMAND_LINE_SIZE];
+static char __initdata command_line[COMMAND_LINE_SIZE];
 
 unsigned char __initdata boot_params[PARAM_SIZE];
 
@@ -649,8 +648,8 @@ void __init setup_arch(char **cmdline_p)
 
 	if ((i = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
 		i = COMMAND_LINE_SIZE;
-	memcpy(saved_command_line, xen_start_info->cmd_line, i);
-	saved_command_line[i - 1] = '\0';
+	memcpy(boot_command_line, xen_start_info->cmd_line, i);
+	boot_command_line[i - 1] = '\0';
 	parse_early_param();
 
 	if (user_defined_memmap) {
@@ -658,11 +657,19 @@ void __init setup_arch(char **cmdline_p)
 		print_memory_map("user");
 	}
 
-	strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
+	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;
 
 	max_low_pfn = setup_memory();
 
+#ifdef CONFIG_VMI
+	/*
+	 * Must be after max_low_pfn is determined, and before kernel
+	 * pagetables are setup.
+	 */
+	vmi_init();
+#endif
+
 	/*
 	 * NOTE: before this point _nobody_ is allowed to allocate
 	 * any memory using the bootmem allocator.  Although the
@@ -825,7 +832,6 @@ void __init setup_arch(char **cmdline_p)
 		conswitchp = &dummy_con;
 #endif
 	}
-	tsc_init();
 }
 
 static int
@@ -835,31 +841,3 @@ xen_panic_event(struct notifier_block *t
 	/* we're never actually going to get here... */
 	return NOTIFY_DONE;
 }
-
-static __init int add_pcspkr(void)
-{
-	struct platform_device *pd;
-	int ret;
-
-	if (!is_initial_xendomain())
-		return 0;
-
-	pd = platform_device_alloc("pcspkr", -1);
-	if (!pd)
-		return -ENOMEM;
-
-	ret = platform_device_add(pd);
-	if (ret)
-		platform_device_put(pd);
-
-	return ret;
-}
-device_initcall(add_pcspkr);
-
-/*
- * Local Variables:
- * mode:c
- * c-file-style:"k&r"
- * c-basic-offset:8
- * End:
- */
--- head-2010-04-29.orig/arch/x86/kernel/smp_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/smp_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -335,8 +335,7 @@ static void flush_tlb_others(cpumask_t c
 	/*
 	 * i'm not happy about this global shared spinlock in the
 	 * MM hot path, but we'll see how contended it is.
-	 * Temporarily this turns IRQs off, so that lockups are
-	 * detected by the NMI watchdog.
+	 * AK: x86-64 has a faster method that could be ported.
 	 */
 	spin_lock(&tlbstate_lock);
 	
@@ -361,7 +360,7 @@ static void flush_tlb_others(cpumask_t c
 
 	while (!cpus_empty(flush_cpumask))
 		/* nothing. lockup detection does not belong here */
-		mb();
+		cpu_relax();
 
 	flush_mm = NULL;
 	flush_va = 0;
--- head-2010-04-29.orig/arch/x86/kernel/time-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/time-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -50,6 +50,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/posix-timers.h>
 #include <linux/cpufreq.h>
+#include <linux/clocksource.h>
 
 #include <asm/io.h>
 #include <asm/smp.h>
@@ -74,25 +75,17 @@
 #include <xen/evtchn.h>
 #include <xen/interface/vcpu.h>
 
-#if defined (__i386__)
-#include <asm/i8259.h>
+#ifdef CONFIG_X86_32
 #include <asm/i8253.h>
 DEFINE_SPINLOCK(i8253_lock);
 EXPORT_SYMBOL(i8253_lock);
-#endif
-
-#define XEN_SHIFT 22
-
 int pit_latch_buggy;              /* extern */
-
-#if defined(__x86_64__)
-unsigned long vxtime_hz = PIT_TICK_RATE;
-struct vxtime_data __vxtime __section_vxtime;   /* for vsyscalls */
+#else
 volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
-struct timespec __xtime __section_xtime;
-struct timezone __sys_tz __section_sys_tz;
 #endif
 
+#define XEN_SHIFT 22
+
 unsigned int cpu_khz;	/* Detected as we calibrate the TSC */
 EXPORT_SYMBOL(cpu_khz);
 
@@ -112,9 +105,6 @@ static DEFINE_PER_CPU(struct shadow_time
 static struct timespec shadow_tv;
 static u32 shadow_tv_version;
 
-static struct timeval monotonic_tv;
-static spinlock_t monotonic_lock = SPIN_LOCK_UNLOCKED;
-
 /* Keep track of last time we did processing/updating of jiffies and xtime. */
 static u64 processed_system_time;   /* System time (ns) at last processing. */
 static DEFINE_PER_CPU(u64, processed_system_time);
@@ -209,7 +199,7 @@ static inline u64 scale_delta(u64 delta,
 	return product;
 }
 
-void init_cpu_khz(void)
+static void init_cpu_khz(void)
 {
 	u64 __cpu_khz = 1000000ULL << 32;
 	struct vcpu_time_info *info = &vcpu_info(0)->time;
@@ -228,16 +218,6 @@ static u64 get_nsec_offset(struct shadow
 	return scale_delta(delta, shadow->tsc_to_nsec_mul, shadow->tsc_shift);
 }
 
-#ifdef CONFIG_X86_64
-static unsigned long get_usec_offset(struct shadow_time_info *shadow)
-{
-	u64 now, delta;
-	rdtscll(now);
-	delta = now - shadow->tsc_timestamp;
-	return scale_delta(delta, shadow->tsc_to_usec_mul, shadow->tsc_shift);
-}
-#endif
-
 static void __update_wallclock(time_t sec, long nsec)
 {
 	long wtm_nsec, xtime_nsec;
@@ -350,142 +330,6 @@ void rtc_cmos_write(unsigned char val, u
 }
 EXPORT_SYMBOL(rtc_cmos_write);
 
-#ifdef CONFIG_X86_64
-
-/*
- * This version of gettimeofday has microsecond resolution
- * and better than microsecond precision on fast x86 machines with TSC.
- */
-void do_gettimeofday(struct timeval *tv)
-{
-	unsigned long seq;
-	unsigned long usec, sec;
-	unsigned long flags;
-	s64 nsec;
-	unsigned int cpu;
-	struct shadow_time_info *shadow;
-	u32 local_time_version;
-
-	cpu = get_cpu();
-	shadow = &per_cpu(shadow_time, cpu);
-
-	do {
-		local_time_version = shadow->version;
-		seq = read_seqbegin(&xtime_lock);
-
-		usec = get_usec_offset(shadow);
-
-		sec = xtime.tv_sec;
-		usec += (xtime.tv_nsec / NSEC_PER_USEC);
-
-		nsec = shadow->system_timestamp - processed_system_time;
-		__normalize_time(&sec, &nsec);
-		usec += (long)nsec / NSEC_PER_USEC;
-
-		if (unlikely(!time_values_up_to_date(cpu))) {
-			/*
-			 * We may have blocked for a long time,
-			 * rendering our calculations invalid
-			 * (e.g. the time delta may have
-			 * overflowed). Detect that and recalculate
-			 * with fresh values.
-			 */
-			get_time_values_from_xen(cpu);
-			continue;
-		}
-	} while (read_seqretry(&xtime_lock, seq) ||
-		 (local_time_version != shadow->version));
-
-	put_cpu();
-
-	while (usec >= USEC_PER_SEC) {
-		usec -= USEC_PER_SEC;
-		sec++;
-	}
-
-	spin_lock_irqsave(&monotonic_lock, flags);
-	if ((sec > monotonic_tv.tv_sec) ||
-	    ((sec == monotonic_tv.tv_sec) && (usec > monotonic_tv.tv_usec)))
-	{
-		monotonic_tv.tv_sec = sec;
-		monotonic_tv.tv_usec = usec;
-	} else {
-		sec = monotonic_tv.tv_sec;
-		usec = monotonic_tv.tv_usec;
-	}
-	spin_unlock_irqrestore(&monotonic_lock, flags);
-
-	tv->tv_sec = sec;
-	tv->tv_usec = usec;
-}
-
-EXPORT_SYMBOL(do_gettimeofday);
-
-int do_settimeofday(struct timespec *tv)
-{
-	time_t sec;
-	s64 nsec;
-	unsigned int cpu;
-	struct shadow_time_info *shadow;
-	struct xen_platform_op op;
-
-	if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
-		return -EINVAL;
-
-	if (!is_initial_xendomain() && !independent_wallclock)
-		return -EPERM;
-
-	cpu = get_cpu();
-	shadow = &per_cpu(shadow_time, cpu);
-
-	write_seqlock_irq(&xtime_lock);
-
-	/*
-	 * Ensure we don't get blocked for a long time so that our time delta
-	 * overflows. If that were to happen then our shadow time values would
-	 * be stale, so we can retry with fresh ones.
-	 */
-	for (;;) {
-		nsec = tv->tv_nsec - get_nsec_offset(shadow);
-		if (time_values_up_to_date(cpu))
-			break;
-		get_time_values_from_xen(cpu);
-	}
-	sec = tv->tv_sec;
-	__normalize_time(&sec, &nsec);
-
-	if (is_initial_xendomain() && !independent_wallclock) {
-		op.cmd = XENPF_settime;
-		op.u.settime.secs        = sec;
-		op.u.settime.nsecs       = nsec;
-		op.u.settime.system_time = shadow->system_timestamp;
-		WARN_ON(HYPERVISOR_platform_op(&op));
-		update_wallclock();
-	} else if (independent_wallclock) {
-		nsec -= shadow->system_timestamp;
-		__normalize_time(&sec, &nsec);
-		__update_wallclock(sec, nsec);
-	}
-	ntp_clear();
-
-	/* Reset monotonic gettimeofday() timeval. */
-	spin_lock(&monotonic_lock);
-	monotonic_tv.tv_sec = 0;
-	monotonic_tv.tv_usec = 0;
-	spin_unlock(&monotonic_lock);
-
-	write_sequnlock_irq(&xtime_lock);
-
-	put_cpu();
-
-	clock_was_set();
-	return 0;
-}
-
-EXPORT_SYMBOL(do_settimeofday);
-
-#endif
-
 static void sync_xen_wallclock(unsigned long dummy);
 static DEFINE_TIMER(sync_xen_wallclock_timer, sync_xen_wallclock, 0, 0);
 static void sync_xen_wallclock(unsigned long dummy)
@@ -534,15 +378,7 @@ static int set_rtc_mmss(unsigned long no
 	return retval;
 }
 
-#ifdef CONFIG_X86_64
-/* monotonic_clock(): returns # of nanoseconds passed since time_init()
- *		Note: This function is required to return accurate
- *		time even in the absence of multiple timer ticks.
- */
-unsigned long long monotonic_clock(void)
-#else
 unsigned long long sched_clock(void)
-#endif
 {
 	unsigned int cpu = get_cpu();
 	struct shadow_time_info *shadow = &per_cpu(shadow_time, cpu);
@@ -562,21 +398,18 @@ unsigned long long sched_clock(void)
 
 	return time;
 }
-#ifdef CONFIG_X86_64
-EXPORT_SYMBOL(monotonic_clock);
-
-unsigned long long sched_clock(void)
-{
-	return monotonic_clock();
-}
-#endif
 
 unsigned long profile_pc(struct pt_regs *regs)
 {
 	unsigned long pc = instruction_pointer(regs);
 
 #if defined(CONFIG_SMP) || defined(__x86_64__)
-	if (!user_mode_vm(regs) && in_lock_functions(pc)) {
+# ifdef __i386__
+	if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->xcs)
+# else
+	if (!user_mode(regs)
+# endif
+	    && in_lock_functions(pc)) {
 # ifdef CONFIG_FRAME_POINTER
 #  ifdef __i386__
 		return ((unsigned long *)regs->ebp)[1];
@@ -585,14 +418,11 @@ unsigned long profile_pc(struct pt_regs 
 #  endif
 # else
 #  ifdef __i386__
-		unsigned long *sp;
-		if ((regs->xcs & 2) == 0)
-			sp = (unsigned long *)&regs->esp;
-		else
-			sp = (unsigned long *)regs->esp;
+		unsigned long *sp = (unsigned long *)&regs->esp;
 #  else
 		unsigned long *sp = (unsigned long *)regs->rsp;
 #  endif
+
 		/* Return address is either directly at stack pointer
 		   or above a saved eflags. Eflags has bits 22-31 zero,
 		   kernel addresses don't. */
@@ -746,19 +576,6 @@ irqreturn_t timer_interrupt(int irq, voi
 	return IRQ_HANDLED;
 }
 
-#ifndef CONFIG_X86_64
-
-void tsc_init(void)
-{
-	init_cpu_khz();
-	printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
-	       cpu_khz / 1000, cpu_khz % 1000);
-
-	use_tsc_delay();
-}
-
-#include <linux/clocksource.h>
-
 void mark_tsc_unstable(void)
 {
 #ifndef CONFIG_XEN /* XXX Should tell the hypervisor about this fact. */
@@ -814,21 +631,9 @@ static struct clocksource clocksource_xe
 	.mask			= CLOCKSOURCE_MASK(64),
 	.mult			= 1 << XEN_SHIFT,		/* time directly in nanoseconds */
 	.shift			= XEN_SHIFT,
-	.is_continuous		= 1,
+	.flags			= CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
-static int __init init_xen_clocksource(void)
-{
-	clocksource_xen.mult = clocksource_khz2mult(cpu_khz,
-						clocksource_xen.shift);
-
-	return clocksource_register(&clocksource_xen);
-}
-
-module_init(init_xen_clocksource);
-
-#endif
-
 static void init_missing_ticks_accounting(unsigned int cpu)
 {
 	struct vcpu_register_runstate_memory_area area;
@@ -849,7 +654,7 @@ static void init_missing_ticks_accountin
 }
 
 /* not static: needed by APM */
-unsigned long get_cmos_time(void)
+unsigned long read_persistent_clock(void)
 {
 	unsigned long retval;
 	unsigned long flags;
@@ -862,11 +667,11 @@ unsigned long get_cmos_time(void)
 
 	return retval;
 }
-EXPORT_SYMBOL(get_cmos_time);
 
 static void sync_cmos_clock(unsigned long dummy);
 
 static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
+int no_sync_cmos_clock;
 
 static void sync_cmos_clock(unsigned long dummy)
 {
@@ -910,7 +715,8 @@ static void sync_cmos_clock(unsigned lon
 
 void notify_arch_cmos_timer(void)
 {
-	mod_timer(&sync_cmos_timer, jiffies + 1);
+	if (!no_sync_cmos_clock)
+		mod_timer(&sync_cmos_timer, jiffies + 1);
 	mod_timer(&sync_xen_wallclock_timer, jiffies + 1);
 }
 
@@ -943,29 +749,11 @@ static int time_init_device(void)
 
 device_initcall(time_init_device);
 
-#ifdef CONFIG_HPET_TIMER
 extern void (*late_time_init)(void);
-/* Duplicate of time_init() below, with hpet_enable part added */
-static void __init hpet_time_init(void)
-{
-	struct timespec ts;
-	ts.tv_sec = get_cmos_time();
-	ts.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
-
-	do_settimeofday(&ts);
-
-	if ((hpet_enable() >= 0) && hpet_use_timer) {
-		printk("Using HPET for base-timer\n");
-	}
-
-	do_time_init();
-}
-#endif
 
 /* Dynamically-mapped IRQ. */
 DEFINE_PER_CPU(int, timer_irq);
 
-extern void (*late_time_init)(void);
 static void setup_cpu0_timer_irq(void)
 {
 	per_cpu(timer_irq, 0) =
@@ -973,7 +761,7 @@ static void setup_cpu0_timer_irq(void)
 			VIRQ_TIMER,
 			0,
 			timer_interrupt,
-			IRQF_DISABLED|IRQF_TIMER,
+			IRQF_DISABLED|IRQF_TIMER|IRQF_NOBALANCING,
 			"timer0",
 			NULL);
 	BUG_ON(per_cpu(timer_irq, 0) < 0);
@@ -985,16 +773,9 @@ static struct vcpu_set_periodic_timer xe
 
 void __init time_init(void)
 {
-#ifdef CONFIG_HPET_TIMER
-	if (is_hpet_capable()) {
-		/*
-		 * HPET initialization needs to do memory-mapped io. So, let
-		 * us do a late initialization after mem_init().
-		 */
-		late_time_init = hpet_time_init;
-		return;
-	}
-#endif
+	init_cpu_khz();
+	printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
+	       cpu_khz / 1000, cpu_khz % 1000);
 
 	switch (HYPERVISOR_vcpu_op(VCPUOP_set_periodic_timer, 0,
 				   &xen_set_periodic_tick)) {
@@ -1013,18 +794,12 @@ void __init time_init(void)
 	per_cpu(processed_system_time, 0) = processed_system_time;
 	init_missing_ticks_accounting(0);
 
-	update_wallclock();
+	clocksource_register(&clocksource_xen);
 
-#ifdef CONFIG_X86_64
-	init_cpu_khz();
-	printk(KERN_INFO "Xen reported: %u.%03u MHz processor.\n",
-	       cpu_khz / 1000, cpu_khz % 1000);
+	update_wallclock();
 
-	vxtime.mode = VXTIME_TSC;
-	vxtime.quot = (1000000L << 32) / vxtime_hz;
-	vxtime.tsc_quot = (1000L << 32) / cpu_khz;
-	sync_core();
-	rdtscll(vxtime.last_tsc);
+#ifndef CONFIG_X86_64
+	use_tsc_delay();
 #endif
 
 	/* Cannot request_irq() until kmem is initialised. */
@@ -1194,7 +969,7 @@ int __cpuinit local_setup_timer(unsigned
 	irq = bind_virq_to_irqhandler(VIRQ_TIMER,
 				      cpu,
 				      timer_interrupt,
-				      IRQF_DISABLED|IRQF_TIMER,
+				      IRQF_DISABLED|IRQF_TIMER|IRQF_NOBALANCING,
 				      timer_name[cpu],
 				      NULL);
 	if (irq < 0)
@@ -1283,7 +1058,7 @@ static ctl_table xen_table[] = {
 };
 static int __init xen_sysctl_init(void)
 {
-	(void)register_sysctl_table(xen_table, 0);
+	(void)register_sysctl_table(xen_table);
 	return 0;
 }
 __initcall(xen_sysctl_init);
--- head-2010-04-29.orig/arch/x86/kernel/traps_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/traps_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -100,6 +100,7 @@ asmlinkage void fixup_4gb_segment(void);
 asmlinkage void machine_check(void);
 
 int kstack_depth_to_print = 24;
+static unsigned int code_bytes = 64;
 ATOMIC_NOTIFIER_HEAD(i386die_chain);
 
 int register_die_notifier(struct notifier_block *nb)
@@ -297,10 +298,11 @@ void show_registers(struct pt_regs *regs
 	int i;
 	int in_kernel = 1;
 	unsigned long esp;
-	unsigned short ss;
+	unsigned short ss, gs;
 
 	esp = (unsigned long) (&regs->esp);
 	savesegment(ss, ss);
+	savesegment(gs, gs);
 	if (user_mode_vm(regs)) {
 		in_kernel = 0;
 		esp = regs->esp;
@@ -319,8 +321,8 @@ void show_registers(struct pt_regs *regs
 		regs->eax, regs->ebx, regs->ecx, regs->edx);
 	printk(KERN_EMERG "esi: %08lx   edi: %08lx   ebp: %08lx   esp: %08lx\n",
 		regs->esi, regs->edi, regs->ebp, esp);
-	printk(KERN_EMERG "ds: %04x   es: %04x   ss: %04x\n",
-		regs->xds & 0xffff, regs->xes & 0xffff, ss);
+	printk(KERN_EMERG "ds: %04x   es: %04x   fs: %04x  gs: %04x  ss: %04x\n",
+	       regs->xds & 0xffff, regs->xes & 0xffff, regs->xfs & 0xffff, gs, ss);
 	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
 		TASK_COMM_LEN, current->comm, current->pid,
 		current_thread_info(), current, current->thread_info);
@@ -330,7 +332,8 @@ void show_registers(struct pt_regs *regs
 	 */
 	if (in_kernel) {
 		u8 *eip;
-		int code_bytes = 64;
+		unsigned int code_prologue = code_bytes * 43 / 64;
+		unsigned int code_len = code_bytes;
 		unsigned char c;
 
 		printk("\n" KERN_EMERG "Stack: ");
@@ -338,14 +341,14 @@ void show_registers(struct pt_regs *regs
 
 		printk(KERN_EMERG "Code: ");
 
-		eip = (u8 *)regs->eip - 43;
+		eip = (u8 *)regs->eip - code_prologue;
 		if (eip < (u8 *)PAGE_OFFSET ||
 			probe_kernel_address(eip, c)) {
 			/* try starting at EIP */
 			eip = (u8 *)regs->eip;
-			code_bytes = 32;
+			code_len = code_len - code_prologue + 1;
 		}
-		for (i = 0; i < code_bytes; i++, eip++) {
+		for (i = 0; i < code_len; i++, eip++) {
 			if (eip < (u8 *)PAGE_OFFSET ||
 				probe_kernel_address(eip, c)) {
 				printk(" Bad EIP value.");
@@ -1134,3 +1137,13 @@ static int __init kstack_setup(char *s)
 	return 1;
 }
 __setup("kstack=", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+	code_bytes = simple_strtoul(s, NULL, 0);
+	if (code_bytes > 8192)
+		code_bytes = 8192;
+
+	return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
--- head-2010-04-29.orig/arch/x86/mm/fault_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/mm/fault_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -46,43 +46,17 @@ int unregister_page_fault_notifier(struc
 }
 EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
 
-static inline int notify_page_fault(enum die_val val, const char *str,
-			struct pt_regs *regs, long err, int trap, int sig)
+static inline int notify_page_fault(struct pt_regs *regs, long err)
 {
 	struct die_args args = {
 		.regs = regs,
-		.str = str,
+		.str = "page fault",
 		.err = err,
-		.trapnr = trap,
-		.signr = sig
+		.trapnr = 14,
+		.signr = SIGSEGV
 	};
-	return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
-}
-
-/*
- * Unlock any spinlocks which will prevent us from getting the
- * message out 
- */
-void bust_spinlocks(int yes)
-{
-	int loglevel_save = console_loglevel;
-
-	if (yes) {
-		oops_in_progress = 1;
-		return;
-	}
-#ifdef CONFIG_VT
-	unblank_screen();
-#endif
-	oops_in_progress = 0;
-	/*
-	 * OK, the message is on the console.  Now we call printk()
-	 * without oops_in_progress set so that printk will give klogd
-	 * a poke.  Hold onto your hats...
-	 */
-	console_loglevel = 15;		/* NMI oopser may have shut the console up */
-	printk(" ");
-	console_loglevel = loglevel_save;
+	return atomic_notifier_call_chain(&notify_page_fault_chain,
+	                                  DIE_PAGE_FAULT, &args);
 }
 
 /*
@@ -476,8 +450,7 @@ fastcall void __kprobes do_page_fault(st
 		/* Can take a spurious fault if mapping changes R/O -> R/W. */
 		if (spurious_fault(regs, address, error_code))
 			return;
-		if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
-						SIGSEGV) == NOTIFY_STOP)
+		if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
 			return;
 		/* 
 		 * Don't take the mm semaphore here. If we fixup a prefetch
@@ -486,8 +459,7 @@ fastcall void __kprobes do_page_fault(st
 		goto bad_area_nosemaphore;
 	}
 
-	if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
-					SIGSEGV) == NOTIFY_STOP)
+	if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
 		return;
 
 	/* It's safe to allow irq's after cr2 has been saved and the vmalloc
--- head-2010-04-29.orig/arch/x86/mm/highmem_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/mm/highmem_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -33,14 +33,16 @@ static void *__kmap_atomic(struct page *
 
 	/* even !CONFIG_PREEMPT needs this, for in_atomic in do_page_fault */
 	pagefault_disable();
+
+	idx = type + KM_TYPE_NR*smp_processor_id();
+	BUG_ON(!pte_none(*(kmap_pte-idx)));
+
 	if (!PageHighMem(page))
 		return page_address(page);
 
-	idx = type + KM_TYPE_NR*smp_processor_id();
 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
-	if (!pte_none(*(kmap_pte-idx)))
-		BUG();
 	set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
+	/*arch_flush_lazy_mmu_mode();*/
 
 	return (void*) vaddr;
 }
@@ -94,6 +96,7 @@ void *kmap_atomic_pfn(unsigned long pfn,
 	idx = type + KM_TYPE_NR*smp_processor_id();
 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 	set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
+	/*arch_flush_lazy_mmu_mode();*/
 
 	return (void*) vaddr;
 }
--- head-2010-04-29.orig/arch/x86/mm/init_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/mm/init_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -66,6 +66,7 @@ static pmd_t * __init one_md_table_init(
 		
 #ifdef CONFIG_X86_PAE
 	pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+	paravirt_alloc_pd(__pa(pmd_table) >> PAGE_SHIFT);
 	make_lowmem_page_readonly(pmd_table, XENFEAT_writable_page_tables);
 	set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
 	pud = pud_offset(pgd, 0);
@@ -87,6 +88,7 @@ static pte_t * __init one_page_table_ini
 {
 	if (pmd_none(*pmd)) {
 		pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+		paravirt_alloc_pt(__pa(page_table) >> PAGE_SHIFT);
 		make_lowmem_page_readonly(page_table,
 					  XENFEAT_writable_page_tables);
 		set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
--- head-2010-04-29.orig/arch/x86/mm/pgtable_32-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/mm/pgtable_32-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -149,6 +149,8 @@ void __set_fixmap (enum fixed_addresses 
 void __init reserve_top_address(unsigned long reserve)
 {
 	BUG_ON(fixmaps > 0);
+	printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
+	       (int)-reserve);
 	__FIXADDR_TOP = -reserve - PAGE_SIZE;
 	__VMALLOC_RESERVE += reserve;
 }
@@ -258,6 +260,12 @@ void pgd_ctor(void *pgd, struct kmem_cac
 				swapper_pg_dir + USER_PTRS_PER_PGD,
 				KERNEL_PGD_PTRS);
 		memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
+
+		/* must happen under lock */
+		paravirt_alloc_pd_clone(__pa(pgd) >> PAGE_SHIFT,
+			__pa(swapper_pg_dir) >> PAGE_SHIFT,
+			USER_PTRS_PER_PGD, PTRS_PER_PGD - USER_PTRS_PER_PGD);
+
 		pgd_list_add(pgd);
 		spin_unlock_irqrestore(&pgd_lock, flags);
 	}
@@ -268,6 +276,7 @@ void pgd_dtor(void *pgd, struct kmem_cac
 {
 	unsigned long flags; /* can be called from interrupt context */
 
+	paravirt_release_pd(__pa(pgd) >> PAGE_SHIFT);
 	spin_lock_irqsave(&pgd_lock, flags);
 	pgd_list_del(pgd);
 	spin_unlock_irqrestore(&pgd_lock, flags);
@@ -292,6 +301,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 			pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
 			if (!pmd)
 				goto out_oom;
+			paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
 			set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
 		}
 		return pgd;
@@ -314,6 +324,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 		pmd[i] = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
 		if (!pmd[i])
 			goto out_oom;
+		paravirt_alloc_pd(__pa(pmd) >> PAGE_SHIFT);
 	}
 
 	spin_lock_irqsave(&pgd_lock, flags);
@@ -354,12 +365,17 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 
 out_oom:
 	if (HAVE_SHARED_KERNEL_PMD) {
-		for (i--; i >= 0; i--)
-			kmem_cache_free(pmd_cache,
-					(void *)__va(pgd_val(pgd[i])-1));
+		for (i--; i >= 0; i--) {
+			pgd_t pgdent = pgd[i];
+			void* pmd = (void *)__va(pgd_val(pgdent)-1);
+			paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+			kmem_cache_free(pmd_cache, pmd);
+		}
 	} else {
-		for (i--; i >= 0; i--)
+		for (i--; i >= 0; i--) {
+			paravirt_release_pd(__pa(pmd[i]) >> PAGE_SHIFT);
 			kmem_cache_free(pmd_cache, pmd[i]);
+		}
 		kfree(pmd);
 	}
 	kmem_cache_free(pgd_cache, pgd);
@@ -383,7 +399,9 @@ void pgd_free(pgd_t *pgd)
 	/* in the PAE case user pgd entries are overwritten before usage */
 	if (PTRS_PER_PMD > 1) {
 		for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
-			pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
+			pgd_t pgdent = pgd[i];
+			void* pmd = (void *)__va(pgd_val(pgdent)-1);
+			paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
 			kmem_cache_free(pmd_cache, pmd);
 		}
 
--- head-2010-04-29.orig/arch/x86/ia32/ia32entry-xen.S	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/arch/x86/ia32/ia32entry-xen.S	2010-03-24 15:09:08.000000000 +0100
@@ -465,7 +465,7 @@ ia32_sys_call_table:
 	.quad sys32_vm86_warning	/* vm86old */ 
 	.quad compat_sys_wait4
 	.quad sys_swapoff		/* 115 */
-	.quad sys32_sysinfo
+	.quad compat_sys_sysinfo
 	.quad sys32_ipc
 	.quad sys_fsync
 	.quad stub32_sigreturn
@@ -510,7 +510,7 @@ ia32_sys_call_table:
 	.quad sys_sched_yield
 	.quad sys_sched_get_priority_max
 	.quad sys_sched_get_priority_min  /* 160 */
-	.quad sys_sched_rr_get_interval
+	.quad sys32_sched_rr_get_interval
 	.quad compat_sys_nanosleep
 	.quad sys_mremap
 	.quad sys_setresuid16
@@ -668,4 +668,5 @@ ia32_sys_call_table:
 	.quad compat_sys_vmsplice
 	.quad compat_sys_move_pages
 	.quad sys_getcpu
+	.quad sys_epoll_pwait
 ia32_syscall_end:		
--- head-2010-04-29.orig/arch/x86/kernel/acpi/sleep_64-xen.c	2008-04-15 09:29:41.000000000 +0200
+++ head-2010-04-29/arch/x86/kernel/acpi/sleep_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -59,7 +59,7 @@ unsigned long acpi_wakeup_address = 0;
 unsigned long acpi_video_flags;
 extern char wakeup_start, wakeup_end;
 
-extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
+extern unsigned long acpi_copy_wakeup_routine(unsigned long);
 
 static pgd_t low_ptr;
 
@@ -67,8 +67,10 @@ static void init_low_mapping(void)
 {
 	pgd_t *slot0 = pgd_offset(current->mm, 0UL);
 	low_ptr = *slot0;
+	/* FIXME: We're playing with the current task's page tables here, which
+	 * is potentially dangerous on SMP systems.
+	 */
 	set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
-	WARN_ON(num_online_cpus() != 1);
 	local_flush_tlb();
 }
 #endif
--- head-2010-04-29.orig/arch/x86/kernel/e820_64-xen.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/e820_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -90,6 +90,13 @@ static inline int bad_addr(unsigned long
 		return 1;
 	}
 
+#ifdef CONFIG_NUMA
+	/* NUMA memory to node map */
+	if (last >= nodemap_addr && addr < nodemap_addr + nodemap_size) {
+		*addrp = nodemap_addr + nodemap_size;
+		return 1;
+	}
+#endif
 	/* XXX ramdisk image here? */ 
 #else
 	if (last < (table_end<<PAGE_SHIFT)) {
@@ -215,6 +222,37 @@ unsigned long __init e820_end_of_ram(voi
 }
 
 /*
+ * Find the hole size in the range.
+ */
+unsigned long __init e820_hole_size(unsigned long start, unsigned long end)
+{
+	unsigned long ram = 0;
+	int i;
+
+	for (i = 0; i < e820.nr_map; i++) {
+		struct e820entry *ei = &e820.map[i];
+		unsigned long last, addr;
+
+		if (ei->type != E820_RAM ||
+		    ei->addr+ei->size <= start ||
+		    ei->addr >= end)
+			continue;
+
+		addr = round_up(ei->addr, PAGE_SIZE);
+		if (addr < start)
+			addr = start;
+
+		last = round_down(ei->addr + ei->size, PAGE_SIZE);
+		if (last >= end)
+			last = end;
+
+		if (last > addr)
+			ram += last - addr;
+	}
+	return ((end - start) - ram);
+}
+
+/*
  * Mark e820 reserved areas as busy for the resource manager.
  */
 void __init e820_reserve_resources(struct e820entry *e820, int nr_map)
@@ -751,7 +789,7 @@ static int __init parse_memmap_opt(char 
 }
 early_param("memmap", parse_memmap_opt);
 
-void finish_e820_parsing(void)
+void __init finish_e820_parsing(void)
 {
 	if (userdef) {
 		printk(KERN_INFO "user-defined physical RAM map:\n");
--- head-2010-04-29.orig/arch/x86/kernel/entry_64-xen.S	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/entry_64-xen.S	2010-03-24 15:09:08.000000000 +0100
@@ -629,6 +629,9 @@ END(invalidate_interrupt\num)
 ENTRY(call_function_interrupt)
 	apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
 END(call_function_interrupt)
+ENTRY(irq_move_cleanup_interrupt)
+	apicinterrupt IRQ_MOVE_CLEANUP_VECTOR,smp_irq_move_cleanup_interrupt
+END(irq_move_cleanup_interrupt)
 #endif
 
 ENTRY(apic_timer_interrupt)
--- head-2010-04-29.orig/arch/x86/kernel/head64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/head64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -45,8 +45,6 @@ static void __init clear_bss(void)
 #define OLD_CL_BASE_ADDR        0x90000
 #define OLD_CL_OFFSET           0x90022
 
-extern char saved_command_line[];
-
 static void __init copy_bootdata(char *real_mode_data)
 {
 #ifndef CONFIG_XEN
@@ -62,14 +60,14 @@ static void __init copy_bootdata(char *r
 		new_data = OLD_CL_BASE_ADDR + * (u16 *) OLD_CL_OFFSET;
 	}
 	command_line = (char *) ((u64)(new_data));
-	memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE);
+	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 #else
 	int max_cmdline;
 	
 	if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
 		max_cmdline = COMMAND_LINE_SIZE;
-	memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
-	saved_command_line[max_cmdline-1] = '\0';
+	memcpy(boot_command_line, xen_start_info->cmd_line, max_cmdline);
+	boot_command_line[max_cmdline-1] = '\0';
 #endif
 }
 
--- head-2010-04-29.orig/arch/x86/kernel/io_apic_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/io_apic_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -36,6 +36,7 @@
 #include <acpi/acpi_bus.h>
 #endif
 
+#include <asm/idle.h>
 #include <asm/io.h>
 #include <asm/smp.h>
 #include <asm/desc.h>
@@ -47,7 +48,20 @@
 #include <asm/msidef.h>
 #include <asm/hypertransport.h>
 
-static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result);
+struct irq_cfg {
+#ifndef CONFIG_XEN
+	cpumask_t domain;
+	cpumask_t old_domain;
+#endif
+	unsigned move_cleanup_count;
+	u8 vector;
+	u8 move_in_progress : 1;
+};
+
+/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
+struct irq_cfg irq_cfg[NR_IRQS] __read_mostly;
+
+static int assign_irq_vector(int irq, cpumask_t mask);
 
 #define __apicdebuginit  __init
 
@@ -89,7 +103,7 @@ int nr_ioapic_registers[MAX_IO_APICS];
  * Rough estimation of how many shared IRQs there are, can
  * be changed anytime.
  */
-#define MAX_PLUS_SHARED_IRQS NR_IRQ_VECTORS
+#define MAX_PLUS_SHARED_IRQS NR_IRQS
 #define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
 
 /*
@@ -262,21 +276,19 @@ static void __target_IO_APIC_irq(unsigne
 
 static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
 {
+	struct irq_cfg *cfg = irq_cfg + irq;
 	unsigned long flags;
 	unsigned int dest;
 	cpumask_t tmp;
-	int vector;
 
 	cpus_and(tmp, mask, cpu_online_map);
 	if (cpus_empty(tmp))
-		tmp = TARGET_CPUS;
-
-	cpus_and(mask, tmp, CPU_MASK_ALL);
+		return;
 
-	vector = assign_irq_vector(irq, mask, &tmp);
-	if (vector < 0)
+	if (assign_irq_vector(irq, mask))
 		return;
 
+	cpus_and(tmp, cfg->domain, mask);
 	dest = cpu_mask_to_apicid(tmp);
 
 	/*
@@ -285,8 +297,8 @@ static void set_ioapic_affinity_irq(unsi
 	dest = SET_APIC_LOGICAL_ID(dest);
 
 	spin_lock_irqsave(&ioapic_lock, flags);
-	__target_IO_APIC_irq(irq, dest, vector);
-	set_native_irq_info(irq, mask);
+	__target_IO_APIC_irq(irq, dest, cfg->vector);
+	irq_desc[irq].affinity = mask;
 	spin_unlock_irqrestore(&ioapic_lock, flags);
 }
 #endif
@@ -332,11 +344,11 @@ static void add_pin_to_irq(unsigned int 
 		reg = io_apic_read(entry->apic, 0x10 + R + pin*2);	\
 		reg ACTION;						\
 		io_apic_modify(entry->apic, reg);			\
+		FINAL;							\
 		if (!entry->next)					\
 			break;						\
 		entry = irq_2_pin + entry->next;			\
 	}								\
-	FINAL;								\
 }
 
 #define DO_ACTION(name,R,ACTION, FINAL)					\
@@ -669,77 +681,62 @@ static int pin_2_irq(int idx, int apic, 
 	return irq;
 }
 
-static inline int IO_APIC_irq_trigger(int irq)
-{
-	int apic, idx, pin;
-
-	for (apic = 0; apic < nr_ioapics; apic++) {
-		for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
-			idx = find_irq_entry(apic,pin,mp_INT);
-			if ((idx != -1) && (irq == pin_2_irq(idx,apic,pin)))
-				return irq_trigger(idx);
-		}
-	}
-	/*
-	 * nonexistent IRQs are edge default
-	 */
-	return 0;
-}
-
-/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
-static u8 irq_vector[NR_IRQ_VECTORS] __read_mostly;
-
-static int __assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
+static int __assign_irq_vector(int irq, cpumask_t mask)
 {
-	int vector;
 	struct physdev_irq irq_op;
+	struct irq_cfg *cfg;
   
-	BUG_ON((unsigned)irq >= NR_IRQ_VECTORS);
+	BUG_ON((unsigned)irq >= NR_IRQS);
 
 	if (irq < PIRQ_BASE || irq - PIRQ_BASE >= NR_PIRQS)
 		return -EINVAL;
 
-	cpus_and(*result, mask, cpu_online_map);
+	cfg = &irq_cfg[irq];
+
+	if ((cfg->move_in_progress) || cfg->move_cleanup_count)
+		return -EBUSY;
 
-	if (irq_vector[irq] > 0)
-		return irq_vector[irq];
+	if (cfg->vector)
+		return 0;
 
 	irq_op.irq = irq;
 	if (HYPERVISOR_physdev_op(PHYSDEVOP_alloc_irq_vector, &irq_op))
 		return -ENOSPC;
 
-	vector = irq_op.vector;
-	irq_vector[irq] = vector;
+	cfg->vector = irq_op.vector;
 
-	return vector;
+	return 0;
 }
 
-static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result)
+static int assign_irq_vector(int irq, cpumask_t mask)
 {
-	int vector;
+	int err;
 	unsigned long flags;
 
 	spin_lock_irqsave(&vector_lock, flags);
-	vector = __assign_irq_vector(irq, mask, result);
+	err = __assign_irq_vector(irq, mask);
 	spin_unlock_irqrestore(&vector_lock, flags);
-	return vector;
+	return err;
 }
 
 #ifndef CONFIG_XEN
 static void __clear_irq_vector(int irq)
 {
+	struct irq_cfg *cfg;
 	cpumask_t mask;
 	int cpu, vector;
 
-	BUG_ON(!irq_vector[irq]);
+	BUG_ON((unsigned)irq >= NR_IRQS);
+	cfg = &irq_cfg[irq];
+	BUG_ON(!cfg->vector);
 
-	vector = irq_vector[irq];
-	cpus_and(mask, irq_domain[irq], cpu_online_map);
+	vector = cfg->vector;
+	cpus_and(mask, cfg->domain, cpu_online_map);
 	for_each_cpu_mask(cpu, mask)
 		per_cpu(vector_irq, cpu)[vector] = -1;
 
-	irq_vector[irq] = 0;
-	irq_domain[irq] = CPU_MASK_NONE;
+	cfg->vector = 0;
+	cfg->domain = CPU_MASK_NONE;
 }
 
 void __setup_vector_irq(int cpu)
@@ -749,10 +746,10 @@ void __setup_vector_irq(int cpu)
 	int irq, vector;
 
 	/* Mark the inuse vectors */
-	for (irq = 0; irq < NR_IRQ_VECTORS; ++irq) {
-		if (!cpu_isset(cpu, irq_domain[irq]))
+	for (irq = 0; irq < NR_IRQS; ++irq) {
+		if (!cpu_isset(cpu, irq_cfg[irq].domain))
 			continue;
-		vector = irq_vector[irq];
+		vector = irq_cfg[irq].vector;
 		per_cpu(vector_irq, cpu)[vector] = irq;
 	}
 	/* Mark the free vectors */
@@ -760,41 +757,49 @@ void __setup_vector_irq(int cpu)
 		irq = per_cpu(vector_irq, cpu)[vector];
 		if (irq < 0)
 			continue;
-		if (!cpu_isset(cpu, irq_domain[irq]))
+		if (!cpu_isset(cpu, irq_cfg[irq].domain))
 			per_cpu(vector_irq, cpu)[vector] = -1;
 	}
 }
 
-extern void (*interrupt[NR_IRQS])(void);
-
 static struct irq_chip ioapic_chip;
 
-#define IOAPIC_AUTO	-1
-#define IOAPIC_EDGE	0
-#define IOAPIC_LEVEL	1
-
-static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
+static void ioapic_register_intr(int irq, unsigned long trigger)
 {
-	if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
-			trigger == IOAPIC_LEVEL)
+	if (trigger)
 		set_irq_chip_and_handler_name(irq, &ioapic_chip,
 					      handle_fasteoi_irq, "fasteoi");
-	else {
-		irq_desc[irq].status |= IRQ_DELAYED_DISABLE;
+	else
 		set_irq_chip_and_handler_name(irq, &ioapic_chip,
 					      handle_edge_irq, "edge");
-	}
 }
 #else
-#define ioapic_register_intr(irq, vector, trigger) evtchn_register_pirq(irq)
+#define ioapic_register_intr(irq, trigger) evtchn_register_pirq(irq)
 #endif /* !CONFIG_XEN */
 
-static void __init setup_IO_APIC_irq(int apic, int pin, int idx, int irq)
+static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,
+			      int trigger, int polarity)
 {
+	struct irq_cfg *cfg = irq_cfg + irq;
 	struct IO_APIC_route_entry entry;
-	int vector;
-	unsigned long flags;
+	cpumask_t mask;
+
+	if (!IO_APIC_IRQ(irq))
+		return;
 
+	mask = TARGET_CPUS;
+	if (assign_irq_vector(irq, mask))
+		return;
+
+#ifndef CONFIG_XEN
+	cpus_and(mask, cfg->domain, mask);
+#endif
+
+	apic_printk(APIC_VERBOSE,KERN_DEBUG
+		    "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> "
+		    "IRQ %d Mode:%i Active:%i)\n",
+		    apic, mp_ioapics[apic].mpc_apicid, pin, cfg->vector,
+		    irq, trigger, polarity);
 
 	/*
 	 * add it to the IO-APIC irq-routing table:
@@ -803,41 +808,23 @@ static void __init setup_IO_APIC_irq(int
 
 	entry.delivery_mode = INT_DELIVERY_MODE;
 	entry.dest_mode = INT_DEST_MODE;
+	entry.dest = cpu_mask_to_apicid(mask);
 	entry.mask = 0;				/* enable IRQ */
-	entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
-
-	entry.trigger = irq_trigger(idx);
-	entry.polarity = irq_polarity(idx);
+	entry.trigger = trigger;
+	entry.polarity = polarity;
+	entry.vector = cfg->vector;
 
-	if (irq_trigger(idx)) {
-		entry.trigger = 1;
+	/* Mask level triggered irqs.
+	 * Use IRQ_DELAYED_DISABLE for edge triggered irqs.
+	 */
+	if (trigger)
 		entry.mask = 1;
-		entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
-	}
-
-	if (/* !apic && */ !IO_APIC_IRQ(irq))
-		return;
 
-	if (IO_APIC_IRQ(irq)) {
-		cpumask_t mask;
-		vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
-		if (vector < 0)
-			return;
-
-		entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
-		entry.vector = vector;
-
-		ioapic_register_intr(irq, vector, IOAPIC_AUTO);
-		if (!apic && (irq < 16))
-			disable_8259A_irq(irq);
-	}
+	ioapic_register_intr(irq, trigger);
+	if (irq < 16)
+		disable_8259A_irq(irq);
 
 	ioapic_write_entry(apic, pin, entry);
-
-	spin_lock_irqsave(&ioapic_lock, flags);
-	set_native_irq_info(irq, TARGET_CPUS);
-	spin_unlock_irqrestore(&ioapic_lock, flags);
-
 }
 
 static void __init setup_IO_APIC_irqs(void)
@@ -862,8 +849,8 @@ static void __init setup_IO_APIC_irqs(vo
 		irq = pin_2_irq(idx, apic, pin);
 		add_pin_to_irq(irq, apic, pin);
 
-		setup_IO_APIC_irq(apic, pin, idx, irq);
-
+		setup_IO_APIC_irq(apic, pin, irq,
+				  irq_trigger(idx), irq_polarity(idx));
 	}
 	}
 
@@ -894,7 +881,7 @@ static void __init setup_ExtINT_IRQ0_pin
 	 */
 	entry.dest_mode = INT_DEST_MODE;
 	entry.mask = 0;					/* unmask IRQ now */
-	entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
+	entry.dest = cpu_mask_to_apicid(TARGET_CPUS);
 	entry.delivery_mode = INT_DELIVERY_MODE;
 	entry.polarity = 0;
 	entry.trigger = 0;
@@ -994,18 +981,17 @@ void __apicdebuginit print_IO_APIC(void)
 
 	printk(KERN_DEBUG ".... IRQ redirection table:\n");
 
-	printk(KERN_DEBUG " NR Log Phy Mask Trig IRR Pol"
-			  " Stat Dest Deli Vect:   \n");
+	printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol"
+			  " Stat Dmod Deli Vect:   \n");
 
 	for (i = 0; i <= reg_01.bits.entries; i++) {
 		struct IO_APIC_route_entry entry;
 
 		entry = ioapic_read_entry(apic, i);
 
-		printk(KERN_DEBUG " %02x %03X %02X  ",
+		printk(KERN_DEBUG " %02x %03X ",
 			i,
-			entry.dest.logical.logical_dest,
-			entry.dest.physical.physical_dest
+			entry.dest
 		);
 
 		printk("%1d    %1d    %1d   %1d   %1d    %1d    %1d    %02X\n",
@@ -1269,8 +1255,7 @@ void disable_IO_APIC(void)
 		entry.dest_mode       = 0; /* Physical */
 		entry.delivery_mode   = dest_ExtINT; /* ExtInt */
 		entry.vector          = 0;
-		entry.dest.physical.physical_dest =
-					GET_APIC_ID(apic_read(APIC_ID));
+		entry.dest          = GET_APIC_ID(apic_read(APIC_ID));
 
 		/*
 		 * Add it to the IO-APIC irq-routing table:
@@ -1355,16 +1340,15 @@ static unsigned int startup_ioapic_irq(u
 
 static int ioapic_retrigger_irq(unsigned int irq)
 {
+	struct irq_cfg *cfg = &irq_cfg[irq];
 	cpumask_t mask;
-	unsigned vector;
 	unsigned long flags;
 
 	spin_lock_irqsave(&vector_lock, flags);
-	vector = irq_vector[irq];
 	cpus_clear(mask);
-	cpu_set(first_cpu(irq_domain[irq]), mask);
+	cpu_set(first_cpu(cfg->domain), mask);
 
-	send_IPI_mask(mask, vector);
+	send_IPI_mask(mask, cfg->vector);
 	spin_unlock_irqrestore(&vector_lock, flags);
 
 	return 1;
@@ -1379,8 +1363,68 @@ static int ioapic_retrigger_irq(unsigned
  * races.
  */
 
+#ifdef CONFIG_SMP
+asmlinkage void smp_irq_move_cleanup_interrupt(void)
+{
+	unsigned vector, me;
+	ack_APIC_irq();
+	exit_idle();
+	irq_enter();
+
+	me = smp_processor_id();
+	for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
+		unsigned int irq;
+		struct irq_desc *desc;
+		struct irq_cfg *cfg;
+		irq = __get_cpu_var(vector_irq)[vector];
+		if (irq >= NR_IRQS)
+			continue;
+
+		desc = irq_desc + irq;
+		cfg = irq_cfg + irq;
+		spin_lock(&desc->lock);
+		if (!cfg->move_cleanup_count)
+			goto unlock;
+
+		if ((vector == cfg->vector) && cpu_isset(me, cfg->domain))
+			goto unlock;
+
+		__get_cpu_var(vector_irq)[vector] = -1;
+		cfg->move_cleanup_count--;
+unlock:
+		spin_unlock(&desc->lock);
+	}
+
+	irq_exit();
+}
+
+static void irq_complete_move(unsigned int irq)
+{
+	struct irq_cfg *cfg = irq_cfg + irq;
+	unsigned vector, me;
+
+	if (likely(!cfg->move_in_progress))
+		return;
+
+	vector = ~get_irq_regs()->orig_rax;
+	me = smp_processor_id();
+	if ((vector == cfg->vector) &&
+	    cpu_isset(smp_processor_id(), cfg->domain)) {
+		cpumask_t cleanup_mask;
+
+		cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map);
+		cfg->move_cleanup_count = cpus_weight(cleanup_mask);
+		send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR);
+		cfg->move_in_progress = 0;
+	}
+}
+#else
+static inline void irq_complete_move(unsigned int irq) {}
+#endif
+
 static void ack_apic_edge(unsigned int irq)
 {
+	irq_complete_move(irq);
 	move_native_irq(irq);
 	ack_APIC_irq();
 }
@@ -1389,6 +1433,7 @@ static void ack_apic_level(unsigned int 
 {
 	int do_unmask_irq = 0;
 
+	irq_complete_move(irq);
 #if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
 	/* If we are moving the irq we need to mask it */
 	if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
@@ -1440,7 +1485,7 @@ static inline void init_IO_APIC_traps(vo
 	 */
 	for (irq = 0; irq < NR_IRQS ; irq++) {
 		int tmp = irq;
-		if (IO_APIC_IRQ(tmp) && !irq_vector[tmp]) {
+		if (IO_APIC_IRQ(tmp) && !irq_cfg[tmp].vector) {
 			/*
 			 * Hmm.. We don't have an entry for this,
 			 * so default to an old-fashioned 8259
@@ -1538,7 +1583,7 @@ static inline void unlock_ExtINT_logic(v
 
 	entry1.dest_mode = 0;			/* physical delivery */
 	entry1.mask = 0;			/* unmask IRQ now */
-	entry1.dest.physical.physical_dest = hard_smp_processor_id();
+	entry1.dest = hard_smp_processor_id();
 	entry1.delivery_mode = dest_ExtINT;
 	entry1.polarity = entry0.polarity;
 	entry1.trigger = 0;
@@ -1582,15 +1627,14 @@ static inline void unlock_ExtINT_logic(v
  */
 static inline void check_timer(void)
 {
+	struct irq_cfg *cfg = irq_cfg + 0;
 	int apic1, pin1, apic2, pin2;
-	int vector;
-	cpumask_t mask;
 
 	/*
 	 * get/set the timer IRQ vector:
 	 */
 	disable_8259A_irq(0);
-	vector = assign_irq_vector(0, TARGET_CPUS, &mask);
+	assign_irq_vector(0, TARGET_CPUS);
 
 	/*
 	 * Subtle, code in do_timer_interrupt() expects an AEOI
@@ -1610,7 +1654,7 @@ static inline void check_timer(void)
 	apic2 = ioapic_i8259.apic;
 
 	apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n",
-		vector, apic1, pin1, apic2, pin2);
+		cfg->vector, apic1, pin1, apic2, pin2);
 
 	if (pin1 != -1) {
 		/*
@@ -1641,7 +1685,7 @@ static inline void check_timer(void)
 		/*
 		 * legacy devices should be connected to IO APIC #0
 		 */
-		setup_ExtINT_IRQ0_pin(apic2, pin2, vector);
+		setup_ExtINT_IRQ0_pin(apic2, pin2, cfg->vector);
 		if (timer_irq_works()) {
 			apic_printk(APIC_VERBOSE," works.\n");
 			nmi_watchdog_default();
@@ -1666,14 +1710,14 @@ static inline void check_timer(void)
 
 	disable_8259A_irq(0);
 	irq_desc[0].chip = &lapic_irq_type;
-	apic_write(APIC_LVT0, APIC_DM_FIXED | vector);	/* Fixed mode */
+	apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector);	/* Fixed mode */
 	enable_8259A_irq(0);
 
 	if (timer_irq_works()) {
 		apic_printk(APIC_VERBOSE," works.\n");
 		return;
 	}
-	apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
+	apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
 	apic_printk(APIC_VERBOSE," failed.\n");
 
 	apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as ExtINT IRQ...");
@@ -1828,19 +1872,16 @@ int create_irq(void)
 	/* Allocate an unused irq */
 	int irq;
 	int new;
-	int vector = 0;
 	unsigned long flags;
-	cpumask_t mask;
 
 	irq = -ENOSPC;
 	spin_lock_irqsave(&vector_lock, flags);
 	for (new = (NR_IRQS - 1); new >= 0; new--) {
 		if (platform_legacy_irq(new))
 			continue;
-		if (irq_vector[new] != 0)
+		if (irq_cfg[new].vector != 0)
 			continue;
-		vector = __assign_irq_vector(new, TARGET_CPUS, &mask);
-		if (likely(vector > 0))
+		if (__assign_irq_vector(new, TARGET_CPUS) == 0)
 			irq = new;
 		break;
 	}
@@ -1871,12 +1912,15 @@ void destroy_irq(unsigned int irq)
 #if defined(CONFIG_PCI_MSI) && !defined(CONFIG_XEN)
 static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
 {
-	int vector;
+	struct irq_cfg *cfg = irq_cfg + irq;
+	int err;
 	unsigned dest;
 	cpumask_t tmp;
 
-	vector = assign_irq_vector(irq, TARGET_CPUS, &tmp);
-	if (vector >= 0) {
+	tmp = TARGET_CPUS;
+	err = assign_irq_vector(irq, tmp);
+	if (!err) {
+		cpus_and(tmp, cfg->domain, tmp);
 		dest = cpu_mask_to_apicid(tmp);
 
 		msg->address_hi = MSI_ADDR_BASE_HI;
@@ -1896,40 +1940,38 @@ static int msi_compose_msg(struct pci_de
 			((INT_DELIVERY_MODE != dest_LowestPrio) ?
 				MSI_DATA_DELIVERY_FIXED:
 				MSI_DATA_DELIVERY_LOWPRI) |
-			MSI_DATA_VECTOR(vector);
+			MSI_DATA_VECTOR(cfg->vector);
 	}
-	return vector;
+	return err;
 }
 
 #ifdef CONFIG_SMP
 static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
 {
+	struct irq_cfg *cfg = irq_cfg + irq;
 	struct msi_msg msg;
 	unsigned int dest;
 	cpumask_t tmp;
-	int vector;
 
 	cpus_and(tmp, mask, cpu_online_map);
 	if (cpus_empty(tmp))
-		tmp = TARGET_CPUS;
-
-	cpus_and(mask, tmp, CPU_MASK_ALL);
+		return;
 
-	vector = assign_irq_vector(irq, mask, &tmp);
-	if (vector < 0)
+	if (assign_irq_vector(irq, mask))
 		return;
 
+	cpus_and(tmp, cfg->domain, mask);
 	dest = cpu_mask_to_apicid(tmp);
 
 	read_msi_msg(irq, &msg);
 
 	msg.data &= ~MSI_DATA_VECTOR_MASK;
-	msg.data |= MSI_DATA_VECTOR(vector);
+	msg.data |= MSI_DATA_VECTOR(cfg->vector);
 	msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
 	msg.address_lo |= MSI_ADDR_DEST_ID(dest);
 
 	write_msi_msg(irq, &msg);
-	set_native_irq_info(irq, mask);
+	irq_desc[irq].affinity = mask;
 }
 #endif /* CONFIG_SMP */
 
@@ -1948,24 +1990,31 @@ static struct irq_chip msi_chip = {
 	.retrigger	= ioapic_retrigger_irq,
 };
 
-int arch_setup_msi_irq(unsigned int irq, struct pci_dev *dev)
+int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 {
 	struct msi_msg msg;
-	int ret;
+	int irq, ret;
+	irq = create_irq();
+	if (irq < 0)
+		return irq;
+
+	set_irq_msi(irq, desc);
 	ret = msi_compose_msg(dev, irq, &msg);
-	if (ret < 0)
+	if (ret < 0) {
+		destroy_irq(irq);
 		return ret;
+	}
 
 	write_msi_msg(irq, &msg);
 
 	set_irq_chip_and_handler_name(irq, &msi_chip, handle_edge_irq, "edge");
 
-	return 0;
+	return irq;
 }
 
 void arch_teardown_msi_irq(unsigned int irq)
 {
-	return;
+	destroy_irq(irq);
 }
 
 #endif /* CONFIG_PCI_MSI */
@@ -1993,24 +2042,22 @@ static void target_ht_irq(unsigned int i
 
 static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
 {
+	struct irq_cfg *cfg = irq_cfg + irq;
 	unsigned int dest;
 	cpumask_t tmp;
-	int vector;
 
 	cpus_and(tmp, mask, cpu_online_map);
 	if (cpus_empty(tmp))
-		tmp = TARGET_CPUS;
-
-	cpus_and(mask, tmp, CPU_MASK_ALL);
+		return;
 
-	vector = assign_irq_vector(irq, mask, &tmp);
-	if (vector < 0)
+	if (assign_irq_vector(irq, mask))
 		return;
 
+	cpus_and(tmp, cfg->domain, mask);
 	dest = cpu_mask_to_apicid(tmp);
 
-	target_ht_irq(irq, dest, vector);
-	set_native_irq_info(irq, mask);
+	target_ht_irq(irq, dest, cfg->vector);
+	irq_desc[irq].affinity = mask;
 }
 #endif
 
@@ -2027,14 +2074,17 @@ static struct irq_chip ht_irq_chip = {
 
 int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
 {
-	int vector;
+	struct irq_cfg *cfg = irq_cfg + irq;
+	int err;
 	cpumask_t tmp;
 
-	vector = assign_irq_vector(irq, TARGET_CPUS, &tmp);
-	if (vector >= 0) {
+	tmp = TARGET_CPUS;
+	err = assign_irq_vector(irq, tmp);
+	if (!err) {
 		struct ht_irq_msg msg;
 		unsigned dest;
 
+		cpus_and(tmp, cfg->domain, tmp);
 		dest = cpu_mask_to_apicid(tmp);
 
 		msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest);
@@ -2042,7 +2092,7 @@ int arch_setup_ht_irq(unsigned int irq, 
 		msg.address_lo =
 			HT_IRQ_LOW_BASE |
 			HT_IRQ_LOW_DEST_ID(dest) |
-			HT_IRQ_LOW_VECTOR(vector) |
+			HT_IRQ_LOW_VECTOR(cfg->vector) |
 			((INT_DEST_MODE == 0) ?
 				HT_IRQ_LOW_DM_PHYSICAL :
 				HT_IRQ_LOW_DM_LOGICAL) |
@@ -2057,7 +2107,7 @@ int arch_setup_ht_irq(unsigned int irq, 
 		set_irq_chip_and_handler_name(irq, &ht_irq_chip,
 					      handle_edge_irq, "edge");
 	}
-	return vector;
+	return err;
 }
 #endif /* CONFIG_HT_IRQ */
 
@@ -2082,13 +2132,8 @@ int __init io_apic_get_redir_entries (in
 }
 
 
-int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int active_high_low)
+int io_apic_set_pci_routing (int ioapic, int pin, int irq, int triggering, int polarity)
 {
-	struct IO_APIC_route_entry entry;
-	unsigned long flags;
-	int vector;
-	cpumask_t mask;
-
 	if (!IO_APIC_IRQ(irq)) {
 		apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
 			ioapic);
@@ -2101,42 +2146,7 @@ int io_apic_set_pci_routing (int ioapic,
 	if (irq >= 16)
 		add_pin_to_irq(irq, ioapic, pin);
 
-
-	vector = assign_irq_vector(irq, TARGET_CPUS, &mask);
-	if (vector < 0)
-		return vector;
-
-	/*
-	 * Generate a PCI IRQ routing entry and program the IOAPIC accordingly.
-	 * Note that we mask (disable) IRQs now -- these get enabled when the
-	 * corresponding device driver registers for this IRQ.
-	 */
-
-	memset(&entry,0,sizeof(entry));
-
-	entry.delivery_mode = INT_DELIVERY_MODE;
-	entry.dest_mode = INT_DEST_MODE;
-	entry.dest.logical.logical_dest = cpu_mask_to_apicid(mask);
-	entry.trigger = edge_level;
-	entry.polarity = active_high_low;
-	entry.mask = 1;					 /* Disabled (masked) */
-	entry.vector = vector & 0xff;
-
-	apic_printk(APIC_VERBOSE,KERN_DEBUG "IOAPIC[%d]: Set PCI routing entry (%d-%d -> 0x%x -> "
-		"IRQ %d Mode:%i Active:%i)\n", ioapic, 
-	       mp_ioapics[ioapic].mpc_apicid, pin, entry.vector, irq,
-	       edge_level, active_high_low);
-
-	ioapic_register_intr(irq, entry.vector, edge_level);
-
-	if (!ioapic && (irq < 16))
-		disable_8259A_irq(irq);
-
-	ioapic_write_entry(ioapic, pin, entry);
-
-	spin_lock_irqsave(&ioapic_lock, flags);
-	set_native_irq_info(irq, TARGET_CPUS);
-	spin_unlock_irqrestore(&ioapic_lock, flags);
+	setup_IO_APIC_irq(ioapic, pin, irq, triggering, polarity);
 
 	return 0;
 }
@@ -2169,8 +2179,10 @@ void __init setup_ioapic_dest(void)
 			 * when you have too many devices, because at that time only boot
 			 * cpu is online.
 			 */
-			if(!irq_vector[irq])
-				setup_IO_APIC_irq(ioapic, pin, irq_entry, irq);
+			if (!irq_cfg[irq].vector)
+				setup_IO_APIC_irq(ioapic, pin, irq,
+						  irq_trigger(irq_entry),
+						  irq_polarity(irq_entry));
 			else
 				set_ioapic_affinity_irq(irq, TARGET_CPUS);
 		}
--- head-2010-04-29.orig/arch/x86/kernel/mpparse_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/mpparse_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -60,9 +60,9 @@ unsigned long mp_lapic_addr = 0;
 /* Processor that is doing the boot up */
 unsigned int boot_cpu_id = -1U;
 /* Internal processor count */
-unsigned int num_processors __initdata = 0;
+unsigned int num_processors __cpuinitdata = 0;
 
-unsigned disabled_cpus __initdata;
+unsigned disabled_cpus __cpuinitdata;
 
 /* Bitmask of physically existing CPUs */
 physid_mask_t phys_cpu_present_map = PHYSID_MASK_NONE;
@@ -808,7 +808,7 @@ int mp_register_gsi(u32 gsi, int trigger
 		return gsi;
 
 	/* Don't set up the ACPI SCI because it's already set up */
-	if (acpi_fadt.sci_int == gsi)
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
 		return gsi;
 
 	ioapic = mp_find_ioapic(gsi);
--- head-2010-04-29.orig/arch/x86/kernel/process_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/process_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -338,14 +338,17 @@ void load_gs_index(unsigned gs)
 void flush_thread(void)
 {
 	struct task_struct *tsk = current;
-	struct thread_info *t = current_thread_info();
 
-	if (t->flags & _TIF_ABI_PENDING) {
-		t->flags ^= (_TIF_ABI_PENDING | _TIF_IA32);
-		if (t->flags & _TIF_IA32)
+	if (test_tsk_thread_flag(tsk, TIF_ABI_PENDING)) {
+		clear_tsk_thread_flag(tsk, TIF_ABI_PENDING);
+		if (test_tsk_thread_flag(tsk, TIF_IA32)) {
+			clear_tsk_thread_flag(tsk, TIF_IA32);
+		} else {
+			set_tsk_thread_flag(tsk, TIF_IA32);
 			current_thread_info()->status |= TS_COMPAT;
+		}
 	}
-	t->flags &= ~_TIF_DEBUG;
+	clear_tsk_thread_flag(tsk, TIF_DEBUG);
 
 	tsk->thread.debugreg0 = 0;
 	tsk->thread.debugreg1 = 0;
--- head-2010-04-29.orig/arch/x86/kernel/setup_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/setup_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -141,7 +141,7 @@ EXPORT_SYMBOL_GPL(edid_info);
 
 extern int root_mountflags;
 
-char command_line[COMMAND_LINE_SIZE];
+char __initdata command_line[COMMAND_LINE_SIZE];
 
 struct resource standard_io_resources[] = {
 	{ .name = "dma1", .start = 0x00, .end = 0x1f,
@@ -179,134 +179,6 @@ struct resource code_resource = {
 	.flags = IORESOURCE_RAM,
 };
 
-#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
-
-static struct resource system_rom_resource = {
-	.name = "System ROM",
-	.start = 0xf0000,
-	.end = 0xfffff,
-	.flags = IORESOURCE_ROM,
-};
-
-static struct resource extension_rom_resource = {
-	.name = "Extension ROM",
-	.start = 0xe0000,
-	.end = 0xeffff,
-	.flags = IORESOURCE_ROM,
-};
-
-static struct resource adapter_rom_resources[] = {
-	{ .name = "Adapter ROM", .start = 0xc8000, .end = 0,
-		.flags = IORESOURCE_ROM },
-	{ .name = "Adapter ROM", .start = 0, .end = 0,
-		.flags = IORESOURCE_ROM },
-	{ .name = "Adapter ROM", .start = 0, .end = 0,
-		.flags = IORESOURCE_ROM },
-	{ .name = "Adapter ROM", .start = 0, .end = 0,
-		.flags = IORESOURCE_ROM },
-	{ .name = "Adapter ROM", .start = 0, .end = 0,
-		.flags = IORESOURCE_ROM },
-	{ .name = "Adapter ROM", .start = 0, .end = 0,
-		.flags = IORESOURCE_ROM }
-};
-
-static struct resource video_rom_resource = {
-	.name = "Video ROM",
-	.start = 0xc0000,
-	.end = 0xc7fff,
-	.flags = IORESOURCE_ROM,
-};
-
-static struct resource video_ram_resource = {
-	.name = "Video RAM area",
-	.start = 0xa0000,
-	.end = 0xbffff,
-	.flags = IORESOURCE_RAM,
-};
-
-#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
-
-static int __init romchecksum(unsigned char *rom, unsigned long length)
-{
-	unsigned char *p, sum = 0;
-
-	for (p = rom; p < rom + length; p++)
-		sum += *p;
-	return sum == 0;
-}
-
-static void __init probe_roms(void)
-{
-	unsigned long start, length, upper;
-	unsigned char *rom;
-	int	      i;
-
-#ifdef CONFIG_XEN
-	/* Nothing to do if not running in dom0. */
-	if (!is_initial_xendomain())
-		return;
-#endif
-
-	/* video rom */
-	upper = adapter_rom_resources[0].start;
-	for (start = video_rom_resource.start; start < upper; start += 2048) {
-		rom = isa_bus_to_virt(start);
-		if (!romsignature(rom))
-			continue;
-
-		video_rom_resource.start = start;
-
-		/* 0 < length <= 0x7f * 512, historically */
-		length = rom[2] * 512;
-
-		/* if checksum okay, trust length byte */
-		if (length && romchecksum(rom, length))
-			video_rom_resource.end = start + length - 1;
-
-		request_resource(&iomem_resource, &video_rom_resource);
-		break;
-			}
-
-	start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
-	if (start < upper)
-		start = upper;
-
-	/* system rom */
-	request_resource(&iomem_resource, &system_rom_resource);
-	upper = system_rom_resource.start;
-
-	/* check for extension rom (ignore length byte!) */
-	rom = isa_bus_to_virt(extension_rom_resource.start);
-	if (romsignature(rom)) {
-		length = extension_rom_resource.end - extension_rom_resource.start + 1;
-		if (romchecksum(rom, length)) {
-			request_resource(&iomem_resource, &extension_rom_resource);
-			upper = extension_rom_resource.start;
-		}
-	}
-
-	/* check for adapter roms on 2k boundaries */
-	for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper;
-	     start += 2048) {
-		rom = isa_bus_to_virt(start);
-		if (!romsignature(rom))
-			continue;
-
-		/* 0 < length <= 0x7f * 512, historically */
-		length = rom[2] * 512;
-
-		/* but accept any length that fits if checksum okay */
-		if (!length || start + length > upper || !romchecksum(rom, length))
-			continue;
-
-		adapter_rom_resources[i].start = start;
-		adapter_rom_resources[i].end = start + length - 1;
-		request_resource(&iomem_resource, &adapter_rom_resources[i]);
-
-		start = adapter_rom_resources[i++].end & ~2047UL;
-	}
-}
-
 #ifdef CONFIG_PROC_VMCORE
 /* elfcorehdr= specifies the location of elf core header
  * stored by the crashed kernel. This option will be passed
@@ -404,7 +276,7 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_XEN
 	extern struct e820map machine_e820;
 
-	printk(KERN_INFO "Command line: %s\n", saved_command_line);
+	printk(KERN_INFO "Command line: %s\n", boot_command_line);
 
 	/* Register a call for panic conditions. */
 	atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
@@ -431,7 +303,7 @@ void __init setup_arch(char **cmdline_p)
 
 	ARCH_SETUP
 #else
-	printk(KERN_INFO "Command line: %s\n", saved_command_line);
+	printk(KERN_INFO "Command line: %s\n", boot_command_line);
 
  	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
  	screen_info = SCREEN_INFO;
@@ -462,7 +334,7 @@ void __init setup_arch(char **cmdline_p)
 
 	early_identify_cpu(&boot_cpu_data);
 
-	strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
+	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;
 
 	parse_early_param();
@@ -532,6 +404,11 @@ void __init setup_arch(char **cmdline_p)
 	/* reserve ebda region */
 	if (ebda_addr)
 		reserve_bootmem_generic(ebda_addr, ebda_size);
+#ifdef CONFIG_NUMA
+	/* reserve nodemap region */
+	if (nodemap_addr)
+		reserve_bootmem_generic(nodemap_addr, nodemap_size);
+#endif
 
 #ifdef CONFIG_SMP
 	/*
@@ -732,10 +609,8 @@ void __init setup_arch(char **cmdline_p)
 #endif
 
 	/*
-	 * Request address space for all standard RAM and ROM resources
-	 * and also for regions reported as reserved by the e820.
+	 * We trust e820 completely. No explicit ROM probing in memory.
 	 */
-	probe_roms();
 #ifdef CONFIG_XEN
 	if (is_initial_xendomain())
 		e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
@@ -744,8 +619,6 @@ void __init setup_arch(char **cmdline_p)
 	e820_mark_nosave_regions();
 #endif
 
-	request_resource(&iomem_resource, &video_ram_resource);
-
 	{
 	unsigned i;
 	/* request I/O space for devices used on all i[345]86 PCs */
@@ -1324,7 +1197,8 @@ static int show_cpuinfo(struct seq_file 
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 		NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
 		NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
-		NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
+		NULL, "fxsr_opt", "pdpe1gb", "rdtscp", NULL, "lm",
+		"3dnowext", "3dnow",
 
 		/* Transmeta-defined */
 		"recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
@@ -1342,7 +1216,7 @@ static int show_cpuinfo(struct seq_file 
 		/* Intel-defined (#2) */
 		"pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
 		"tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
-		NULL, NULL, "dca", NULL, NULL, NULL, NULL, NULL,
+		NULL, NULL, "dca", NULL, NULL, NULL, NULL, "popcnt",
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 
 		/* VIA/Cyrix/Centaur-defined */
@@ -1352,8 +1226,10 @@ static int show_cpuinfo(struct seq_file 
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 
 		/* AMD-defined (#2) */
-		"lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
-		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+		"lahf_lm", "cmp_legacy", "svm", "extapic", "cr8_legacy",
+		"altmovcr8", "abm", "sse4a",
+		"misalignsse", "3dnowprefetch",
+		"osvw", "ibs", NULL, NULL, NULL, NULL,
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 		NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 	};
@@ -1364,6 +1240,9 @@ static int show_cpuinfo(struct seq_file 
 		"ttp",  /* thermal trip */
 		"tm",
 		"stc",
+		"100mhzsteps",
+		"hwpstate",
+		NULL,	/* tsc invariant mapped to constant_tsc */
 		NULL,
 		/* nothing */	/* constant_tsc - moved to flags */
 	};
@@ -1480,26 +1359,3 @@ struct seq_operations cpuinfo_op = {
 	.stop =	c_stop,
 	.show =	show_cpuinfo,
 };
-
-#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
-#include <linux/platform_device.h>
-static __init int add_pcspkr(void)
-{
-	struct platform_device *pd;
-	int ret;
-
-	if (!is_initial_xendomain())
-		return 0;
-
-	pd = platform_device_alloc("pcspkr", -1);
-	if (!pd)
-		return -ENOMEM;
-
-	ret = platform_device_add(pd);
-	if (ret)
-		platform_device_put(pd);
-
-	return ret;
-}
-device_initcall(add_pcspkr);
-#endif
--- head-2010-04-29.orig/arch/x86/kernel/vsyscall_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/kernel/vsyscall_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -26,6 +26,7 @@
 #include <linux/seqlock.h>
 #include <linux/jiffies.h>
 #include <linux/sysctl.h>
+#include <linux/clocksource.h>
 #include <linux/getcpu.h>
 #include <linux/cpu.h>
 #include <linux/smp.h>
@@ -34,6 +35,7 @@
 #include <asm/vsyscall.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
+#include <asm/unistd.h>
 #include <asm/fixmap.h>
 #include <asm/errno.h>
 #include <asm/io.h>
@@ -44,56 +46,41 @@
 #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
 #define __syscall_clobber "r11","rcx","memory"
 
-int __sysctl_vsyscall __section_sysctl_vsyscall = 1;
-seqlock_t __xtime_lock __section_xtime_lock = SEQLOCK_UNLOCKED;
+struct vsyscall_gtod_data_t {
+	seqlock_t lock;
+	int sysctl_enabled;
+	struct timeval wall_time_tv;
+	struct timezone sys_tz;
+	cycle_t offset_base;
+	struct clocksource clock;
+};
 int __vgetcpu_mode __section_vgetcpu_mode;
 
-#include <asm/unistd.h>
-
-static __always_inline void timeval_normalize(struct timeval * tv)
+struct vsyscall_gtod_data_t __vsyscall_gtod_data __section_vsyscall_gtod_data =
 {
-	time_t __sec;
-
-	__sec = tv->tv_usec / 1000000;
-	if (__sec) {
-		tv->tv_usec %= 1000000;
-		tv->tv_sec += __sec;
-	}
-}
+	.lock = SEQLOCK_UNLOCKED,
+	.sysctl_enabled = 1,
+};
 
-static __always_inline void do_vgettimeofday(struct timeval * tv)
+void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
 {
-	long sequence, t;
-	unsigned long sec, usec;
+	unsigned long flags;
 
-	do {
-		sequence = read_seqbegin(&__xtime_lock);
-		
-		sec = __xtime.tv_sec;
-		usec = __xtime.tv_nsec / 1000;
-
-		if (__vxtime.mode != VXTIME_HPET) {
-			t = get_cycles_sync();
-			if (t < __vxtime.last_tsc)
-				t = __vxtime.last_tsc;
-			usec += ((t - __vxtime.last_tsc) *
-				 __vxtime.tsc_quot) >> 32;
-			/* See comment in x86_64 do_gettimeofday. */
-		} else {
-			usec += ((readl((void __iomem *)
-				   fix_to_virt(VSYSCALL_HPET) + 0xf0) -
-				  __vxtime.last) * __vxtime.quot) >> 32;
-		}
-	} while (read_seqretry(&__xtime_lock, sequence));
-
-	tv->tv_sec = sec + usec / 1000000;
-	tv->tv_usec = usec % 1000000;
+	write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
+	/* copy vsyscall data */
+	vsyscall_gtod_data.clock = *clock;
+	vsyscall_gtod_data.wall_time_tv.tv_sec = wall_time->tv_sec;
+	vsyscall_gtod_data.wall_time_tv.tv_usec = wall_time->tv_nsec/1000;
+	vsyscall_gtod_data.sys_tz = sys_tz;
+	write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
 }
 
-/* RED-PEN may want to readd seq locking, but then the variable should be write-once. */
+/* RED-PEN may want to readd seq locking, but then the variable should be
+ * write-once.
+ */
 static __always_inline void do_get_tz(struct timezone * tz)
 {
-	*tz = __sys_tz;
+	*tz = __vsyscall_gtod_data.sys_tz;
 }
 
 static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
@@ -101,7 +88,8 @@ static __always_inline int gettimeofday(
 	int ret;
 	asm volatile("vsysc2: syscall"
 		: "=a" (ret)
-		: "0" (__NR_gettimeofday),"D" (tv),"S" (tz) : __syscall_clobber );
+		: "0" (__NR_gettimeofday),"D" (tv),"S" (tz)
+		: __syscall_clobber );
 	return ret;
 }
 
@@ -114,10 +102,44 @@ static __always_inline long time_syscall
 	return secs;
 }
 
+static __always_inline void do_vgettimeofday(struct timeval * tv)
+{
+	cycle_t now, base, mask, cycle_delta;
+	unsigned long seq, mult, shift, nsec_delta;
+	cycle_t (*vread)(void);
+	do {
+		seq = read_seqbegin(&__vsyscall_gtod_data.lock);
+
+		vread = __vsyscall_gtod_data.clock.vread;
+		if (unlikely(!__vsyscall_gtod_data.sysctl_enabled || !vread)) {
+			gettimeofday(tv,NULL);
+			return;
+		}
+		now = vread();
+		base = __vsyscall_gtod_data.clock.cycle_last;
+		mask = __vsyscall_gtod_data.clock.mask;
+		mult = __vsyscall_gtod_data.clock.mult;
+		shift = __vsyscall_gtod_data.clock.shift;
+
+		*tv = __vsyscall_gtod_data.wall_time_tv;
+
+	} while (read_seqretry(&__vsyscall_gtod_data.lock, seq));
+
+	/* calculate interval: */
+	cycle_delta = (now - base) & mask;
+	/* convert to nsecs: */
+	nsec_delta = (cycle_delta * mult) >> shift;
+
+	/* convert to usecs and add to timespec: */
+	tv->tv_usec += nsec_delta / NSEC_PER_USEC;
+	while (tv->tv_usec > USEC_PER_SEC) {
+		tv->tv_sec += 1;
+		tv->tv_usec -= USEC_PER_SEC;
+	}
+}
+
 int __vsyscall(0) vgettimeofday(struct timeval * tv, struct timezone * tz)
 {
-	if (!__sysctl_vsyscall)
-		return gettimeofday(tv,tz);
 	if (tv)
 		do_vgettimeofday(tv);
 	if (tz)
@@ -129,11 +151,11 @@ int __vsyscall(0) vgettimeofday(struct t
  * unlikely */
 time_t __vsyscall(1) vtime(time_t *t)
 {
-	if (!__sysctl_vsyscall)
+	if (unlikely(!__vsyscall_gtod_data.sysctl_enabled))
 		return time_syscall(t);
 	else if (t)
-		*t = __xtime.tv_sec;		
-	return __xtime.tv_sec;
+		*t = __vsyscall_gtod_data.wall_time_tv.tv_sec;
+	return __vsyscall_gtod_data.wall_time_tv.tv_sec;
 }
 
 /* Fast way to get current CPU and node.
@@ -210,7 +232,7 @@ static int vsyscall_sysctl_change(ctl_ta
 		ret = -ENOMEM;
 		goto out;
 	}
-	if (!sysctl_vsyscall) {
+	if (!vsyscall_gtod_data.sysctl_enabled) {
 		writew(SYSCALL, map1);
 		writew(SYSCALL, map2);
 	} else {
@@ -232,16 +254,17 @@ static int vsyscall_sysctl_nostrat(ctl_t
 
 static ctl_table kernel_table2[] = {
 	{ .ctl_name = 99, .procname = "vsyscall64",
-	  .data = &sysctl_vsyscall, .maxlen = sizeof(int), .mode = 0644,
+	  .data = &vsyscall_gtod_data.sysctl_enabled, .maxlen = sizeof(int),
+	  .mode = 0644,
 	  .strategy = vsyscall_sysctl_nostrat,
 	  .proc_handler = vsyscall_sysctl_change },
-	{ 0, }
+	{}
 };
 
 static ctl_table kernel_root_table2[] = {
 	{ .ctl_name = CTL_KERN, .procname = "kernel", .mode = 0555,
 	  .child = kernel_table2 },
-	{ 0 },
+	{}
 };
 
 #endif
@@ -304,14 +327,14 @@ static int __init vsyscall_init(void)
 	BUG_ON((unsigned long) &vgetcpu != VSYSCALL_ADDR(__NR_vgetcpu));
 	map_vsyscall();
 #ifdef CONFIG_XEN
-	sysctl_vsyscall = 0; /* disable vgettimeofay() */
+	vsyscall_gtod_data.sysctl_enabled = 0; /* disable vgettimeofay() */
  	if (boot_cpu_has(X86_FEATURE_RDTSCP))
 		vgetcpu_mode = VGETCPU_RDTSCP;
 	else
 		vgetcpu_mode = VGETCPU_LSL;
 #endif
 #ifdef CONFIG_SYSCTL
-	register_sysctl_table(kernel_root_table2, 0);
+	register_sysctl_table(kernel_root_table2);
 #endif
 	on_each_cpu(cpu_vsyscall_init, NULL, 0, 1);
 	hotcpu_notifier(cpu_vsyscall_notifier, 0);
--- head-2010-04-29.orig/arch/x86/mm/fault_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/mm/fault_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -56,38 +56,17 @@ int unregister_page_fault_notifier(struc
 }
 EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
 
-static inline int notify_page_fault(enum die_val val, const char *str,
-			struct pt_regs *regs, long err, int trap, int sig)
+static inline int notify_page_fault(struct pt_regs *regs, long err)
 {
 	struct die_args args = {
 		.regs = regs,
-		.str = str,
+		.str = "page fault",
 		.err = err,
-		.trapnr = trap,
-		.signr = sig
+		.trapnr = 14,
+		.signr = SIGSEGV
 	};
-	return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);
-}
-
-void bust_spinlocks(int yes)
-{
-	int loglevel_save = console_loglevel;
-	if (yes) {
-		oops_in_progress = 1;
-	} else {
-#ifdef CONFIG_VT
-		unblank_screen();
-#endif
-		oops_in_progress = 0;
-		/*
-		 * OK, the message is on the console.  Now we call printk()
-		 * without oops_in_progress set so that printk will give klogd
-		 * a poke.  Hold onto your hats...
-		 */
-		console_loglevel = 15;		/* NMI oopser may have shut the console up */
-		printk(" ");
-		console_loglevel = loglevel_save;
-	}
+	return atomic_notifier_call_chain(&notify_page_fault_chain,
+	                                  DIE_PAGE_FAULT, &args);
 }
 
 /* Sometimes the CPU reports invalid exceptions on prefetch.
@@ -437,8 +416,7 @@ asmlinkage void __kprobes do_page_fault(
 		/* Can take a spurious fault if mapping changes R/O -> R/W. */
 		if (spurious_fault(regs, address, error_code))
 			return;
-		if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
-						SIGSEGV) == NOTIFY_STOP)
+		if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
 			return;
 		/*
 		 * Don't take the mm semaphore here. If we fixup a prefetch
@@ -447,8 +425,7 @@ asmlinkage void __kprobes do_page_fault(
 		goto bad_area_nosemaphore;
 	}
 
-	if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,
-					SIGSEGV) == NOTIFY_STOP)
+	if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
 		return;
 
 	if (likely(regs->eflags & X86_EFLAGS_IF))
--- head-2010-04-29.orig/arch/x86/mm/init_64-xen.c	2010-04-29 09:46:52.000000000 +0200
+++ head-2010-04-29/arch/x86/mm/init_64-xen.c	2010-04-29 09:47:17.000000000 +0200
@@ -1145,20 +1145,30 @@ int kern_addr_valid(unsigned long addr) 
 extern int exception_trace, page_fault_trace;
 
 static ctl_table debug_table2[] = {
-	{ 99, "exception-trace", &exception_trace, sizeof(int), 0644, NULL,
-	  proc_dointvec },
-	{ 0, }
+	{
+		.ctl_name	= 99,
+		.procname	= "exception-trace",
+		.data		= &exception_trace,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec
+	},
+	{}
 }; 
 
 static ctl_table debug_root_table2[] = { 
-	{ .ctl_name = CTL_DEBUG, .procname = "debug", .mode = 0555, 
-	   .child = debug_table2 }, 
-	{ 0 }, 
+	{
+		.ctl_name = CTL_DEBUG,
+		.procname = "debug",
+		.mode = 0555,
+		.child = debug_table2
+	},
+	{}
 }; 
 
 static __init int x8664_sysctl_init(void)
 { 
-	register_sysctl_table(debug_root_table2, 1);
+	register_sysctl_table(debug_root_table2);
 	return 0;
 }
 __initcall(x8664_sysctl_init);
--- head-2010-04-29.orig/arch/x86/mm/pageattr_64-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/mm/pageattr_64-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -350,8 +350,8 @@ static void flush_kernel_map(void *arg)
 		void *adr = page_address(pg);
 		if (cpu_has_clflush)
 			cache_flush_page(adr);
-		__flush_tlb_one(adr);
 	}
+	__flush_tlb_all();
 }
 
 static inline void flush_map(struct list_head *l)
@@ -376,6 +376,7 @@ static void revert_page(unsigned long ad
 	pud_t *pud;
 	pmd_t *pmd;
 	pte_t large_pte;
+	unsigned long pfn;
 
 	pgd = pgd_offset_k(address);
 	BUG_ON(pgd_none(*pgd));
@@ -383,7 +384,8 @@ static void revert_page(unsigned long ad
 	BUG_ON(pud_none(*pud));
 	pmd = pmd_offset(pud, address);
 	BUG_ON(__pmd_val(*pmd) & _PAGE_PSE);
-	large_pte = mk_pte_phys(__pa(address) & LARGE_PAGE_MASK, ref_prot);
+	pfn = (__pa(address) & LARGE_PAGE_MASK) >> PAGE_SHIFT;
+	large_pte = pfn_pte(pfn, ref_prot);
 	large_pte = pte_mkhuge(large_pte);
 	set_pte((pte_t *)pmd, large_pte);
 }      
--- head-2010-04-29.orig/drivers/acpi/processor_extcntl.c	2010-03-24 14:53:41.000000000 +0100
+++ head-2010-04-29/drivers/acpi/processor_extcntl.c	2010-03-24 15:09:08.000000000 +0100
@@ -32,9 +32,8 @@
 
 #define ACPI_PROCESSOR_COMPONENT        0x01000000
 #define ACPI_PROCESSOR_CLASS            "processor"
-#define ACPI_PROCESSOR_DRIVER_NAME      "ACPI Processor Driver"
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
-ACPI_MODULE_NAME("acpi_processor")
+ACPI_MODULE_NAME("processor_extcntl")
 
 static int processor_extcntl_parse_csd(struct acpi_processor *pr);
 static int processor_extcntl_get_performance(struct acpi_processor *pr);
@@ -56,24 +55,17 @@ static int processor_notify_smm(void)
 		return 0;
 
 	/* Can't write pstate_cnt to smi_cmd if either value is zero */
-	if ((!acpi_fadt.smi_cmd) || (!acpi_fadt.pstate_cnt)) {
+	if (!acpi_gbl_FADT.smi_command || !acpi_gbl_FADT.pstate_control) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,"No SMI port or pstate_cnt\n"));
 		return 0;
 	}
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 		"Writing pstate_cnt [0x%x] to smi_cmd [0x%x]\n",
-		acpi_fadt.pstate_cnt, acpi_fadt.smi_cmd));
+		acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command));
 
-	/* FADT v1 doesn't support pstate_cnt, many BIOS vendors use
-	 * it anyway, so we need to support it... */
-	if (acpi_fadt_is_v1) {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-			"Using v1.0 FADT reserved value for pstate_cnt\n"));
-	}
-
-	status = acpi_os_write_port(acpi_fadt.smi_cmd,
-				    (u32) acpi_fadt.pstate_cnt, 8);
+	status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
+				    acpi_gbl_FADT.pstate_control, 8);
 	if (ACPI_FAILURE(status))
 		return status;
 
--- head-2010-04-29.orig/drivers/char/tpm/tpm_xen.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/drivers/char/tpm/tpm_xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -481,7 +481,6 @@ static struct xenbus_device_id tpmfront_
 
 static struct xenbus_driver tpmfront = {
 	.name = "vtpm",
-	.owner = THIS_MODULE,
 	.ids = tpmfront_ids,
 	.probe = tpmfront_probe,
 	.remove =  tpmfront_remove,
@@ -491,9 +490,9 @@ static struct xenbus_driver tpmfront = {
 	.suspend_cancel = tpmfront_suspend_cancel,
 };
 
-static void __init init_tpm_xenbus(void)
+static int __init init_tpm_xenbus(void)
 {
-	xenbus_register_frontend(&tpmfront);
+	return xenbus_register_frontend(&tpmfront);
 }
 
 static int tpmif_allocate_tx_buffers(struct tpm_private *tp)
--- head-2010-04-29.orig/drivers/pci/msi-xen.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/pci/msi-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -36,8 +36,6 @@ struct msi_dev_list {
 	struct list_head list;
 	spinlock_t pirq_list_lock;
 	struct list_head pirq_list_head;
-	/* Used for saving/restoring MSI-X tables */
-	void __iomem *mask_base;
 	/* Store default pre-assigned irq */
 	unsigned int default_irq;
 };
@@ -46,14 +44,38 @@ struct msi_pirq_entry {
 	struct list_head list;
 	int pirq;
 	int entry_nr;
-#ifdef CONFIG_PM
-	/* PM save area for MSIX address/data */
-	u32	address_hi_save;
-	u32	address_lo_save;
-	u32	data_save;
-#endif
 };
 
+static void msi_set_enable(struct pci_dev *dev, int enable)
+{
+	int pos;
+	u16 control;
+
+	pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
+	if (pos) {
+		pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
+		control &= ~PCI_MSI_FLAGS_ENABLE;
+		if (enable)
+			control |= PCI_MSI_FLAGS_ENABLE;
+		pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
+	}
+}
+
+static void msix_set_enable(struct pci_dev *dev, int enable)
+{
+	int pos;
+	u16 control;
+
+	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
+	if (pos) {
+		pci_read_config_word(dev, pos + PCI_MSIX_FLAGS, &control);
+		control &= ~PCI_MSIX_FLAGS_ENABLE;
+		if (enable)
+			control |= PCI_MSIX_FLAGS_ENABLE;
+		pci_write_config_word(dev, pos + PCI_MSIX_FLAGS, control);
+	}
+}
+
 static struct msi_dev_list *get_msi_dev_pirq_list(struct pci_dev *dev)
 {
 	struct msi_dev_list *msi_dev_list, *ret = NULL;
@@ -163,8 +185,8 @@ static int msi_unmap_pirq(struct pci_dev
 	int rc;
 
 	unmap.domid = msi_get_dev_owner(dev);
-	/* See comments in msi_map_pirq_to_vector, input parameter pirq
-	 * mean irq number only if the device belongs to dom0 itself.
+	/* See comments in msi_map_vector, input parameter pirq means
+	 * irq number only if the device belongs to dom0 itself.
 	 */
 	unmap.pirq = (unmap.domid != DOMID_SELF)
 		? pirq : evtchn_get_xen_pirq(pirq);
@@ -200,8 +222,7 @@ static u64 find_table_base(struct pci_de
 /*
  * Protected by msi_lock
  */
-static int msi_map_pirq_to_vector(struct pci_dev *dev, int pirq,
-				  int entry_nr, u64 table_base)
+static int msi_map_vector(struct pci_dev *dev, int entry_nr, u64 table_base)
 {
 	struct physdev_map_pirq map_irq;
 	int rc;
@@ -212,7 +233,7 @@ static int msi_map_pirq_to_vector(struct
 	map_irq.domid = domid;
 	map_irq.type = MAP_PIRQ_TYPE_MSI;
 	map_irq.index = -1;
-	map_irq.pirq = pirq < 0 ? -1 : evtchn_get_xen_pirq(pirq);
+	map_irq.pirq = -1;
 	map_irq.bus = dev->bus->number;
 	map_irq.devfn = dev->devfn;
 	map_irq.entry_nr = entry_nr;
@@ -223,7 +244,7 @@ static int msi_map_pirq_to_vector(struct
 
 	if (rc < 0)
 		return rc;
-	/* This happens when MSI support is not enabled in Xen. */
+	/* This happens when MSI support is not enabled in older Xen. */
 	if (rc == 0 && map_irq.pirq < 0)
 		return -ENOSYS;
 
@@ -235,236 +256,35 @@ static int msi_map_pirq_to_vector(struct
 	 * to another domain, and will be 'Linux irq' if it belongs to dom0.
 	 */
 	return ((domid != DOMID_SELF) ?
-		map_irq.pirq : evtchn_map_pirq(pirq, map_irq.pirq));
-}
-
-static int msi_map_vector(struct pci_dev *dev, int entry_nr, u64 table_base)
-{
-	return msi_map_pirq_to_vector(dev, -1, entry_nr, table_base);
+		map_irq.pirq : evtchn_map_pirq(-1, map_irq.pirq));
 }
 
 static int msi_init(void)
 {
-	static int status = 0;
-
-	if (pci_msi_quirk) {
-		pci_msi_enable = 0;
-		printk(KERN_WARNING "PCI: MSI quirk detected. MSI disabled.\n");
-		status = -EINVAL;
-	}
-
-	return status;
-}
-
-void pci_scan_msi_device(struct pci_dev *dev) { }
-
-void disable_msi_mode(struct pci_dev *dev, int pos, int type)
-{
-	u16 control;
-
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	if (type == PCI_CAP_ID_MSI) {
-		/* Set enabled bits to single MSI & enable MSI_enable bit */
-		msi_disable(control);
-		pci_write_config_word(dev, msi_control_reg(pos), control);
-		dev->msi_enabled = 0;
-	} else {
-		msix_disable(control);
-		pci_write_config_word(dev, msi_control_reg(pos), control);
-		dev->msix_enabled = 0;
-	}
-
-	pci_intx(dev, 1);  /* enable intx */
-}
-
-static void enable_msi_mode(struct pci_dev *dev, int pos, int type)
-{
-	u16 control;
-
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	if (type == PCI_CAP_ID_MSI) {
-		/* Set enabled bits to single MSI & enable MSI_enable bit */
-		msi_enable(control, 1);
-		pci_write_config_word(dev, msi_control_reg(pos), control);
-		dev->msi_enabled = 1;
-	} else {
-		msix_enable(control);
-		pci_write_config_word(dev, msi_control_reg(pos), control);
-		dev->msix_enabled = 1;
-	}
-
-	pci_intx(dev, 0);  /* disable intx */
-}
-
-#ifdef CONFIG_PM
-int pci_save_msi_state(struct pci_dev *dev)
-{
-	int pos, i = 0;
-	u16 control;
-	struct pci_cap_saved_state *save_state;
-	u32 *cap;
-
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
-	if (pos <= 0 || dev->no_msi)
-		return 0;
-
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	if (!(control & PCI_MSI_FLAGS_ENABLE))
-		return 0;
-
-	save_state = kzalloc(sizeof(struct pci_cap_saved_state) + sizeof(u32) * 5,
-		GFP_KERNEL);
-	if (!save_state) {
-		printk(KERN_ERR "Out of memory in pci_save_msi_state\n");
-		return -ENOMEM;
-	}
-	cap = &save_state->data[0];
-
-	pci_read_config_dword(dev, pos, &cap[i++]);
-	control = cap[0] >> 16;
-	pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_LO, &cap[i++]);
-	if (control & PCI_MSI_FLAGS_64BIT) {
-		pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_HI, &cap[i++]);
-		pci_read_config_dword(dev, pos + PCI_MSI_DATA_64, &cap[i++]);
-	} else
-		pci_read_config_dword(dev, pos + PCI_MSI_DATA_32, &cap[i++]);
-	if (control & PCI_MSI_FLAGS_MASKBIT)
-		pci_read_config_dword(dev, pos + PCI_MSI_MASK_BIT, &cap[i++]);
-	save_state->cap_nr = PCI_CAP_ID_MSI;
-	pci_add_saved_cap(dev, save_state);
 	return 0;
 }
 
+#ifdef CONFIG_PM
 void pci_restore_msi_state(struct pci_dev *dev)
 {
-	int i = 0, pos;
-	u16 control;
-	struct pci_cap_saved_state *save_state;
-	u32 *cap;
-
-	save_state = pci_find_saved_cap(dev, PCI_CAP_ID_MSI);
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
-	if (!save_state || pos <= 0)
-		return;
-	cap = &save_state->data[0];
-
-	control = cap[i++] >> 16;
-	pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_LO, cap[i++]);
-	if (control & PCI_MSI_FLAGS_64BIT) {
-		pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_HI, cap[i++]);
-		pci_write_config_dword(dev, pos + PCI_MSI_DATA_64, cap[i++]);
-	} else
-		pci_write_config_dword(dev, pos + PCI_MSI_DATA_32, cap[i++]);
-	if (control & PCI_MSI_FLAGS_MASKBIT)
-		pci_write_config_dword(dev, pos + PCI_MSI_MASK_BIT, cap[i++]);
-	pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
-	enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
-	pci_remove_saved_cap(save_state);
-	kfree(save_state);
-}
-
-int pci_save_msix_state(struct pci_dev *dev)
-{
-	int pos;
-	u16 control;
-	struct pci_cap_saved_state *save_state;
-	unsigned long flags;
-	struct msi_dev_list *msi_dev_entry;
-	struct msi_pirq_entry *pirq_entry;
-	void __iomem *base;
-
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-	if (pos <= 0 || dev->no_msi)
-		return 0;
-
-	/* save the capability */
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	if (!(control & PCI_MSIX_FLAGS_ENABLE))
-		return 0;
-
-	msi_dev_entry = get_msi_dev_pirq_list(dev);
-	/* If we failed to map the MSI-X table at pci_enable_msix,
-	 * We could not support saving them here.
-	 */
-	if (!(base = msi_dev_entry->mask_base))
-		return -ENOMEM;
-
-	save_state = kzalloc(sizeof(struct pci_cap_saved_state) + sizeof(u16),
-		GFP_KERNEL);
-	if (!save_state) {
-		printk(KERN_ERR "Out of memory in pci_save_msix_state\n");
-		return -ENOMEM;
-	}
-	*((u16 *)&save_state->data[0]) = control;
-
-	spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
-	list_for_each_entry(pirq_entry, &msi_dev_entry->pirq_list_head, list) {
-		int j;
-
-		/* save the table */
-		j = pirq_entry->entry_nr;
-		pirq_entry->address_lo_save =
-			readl(base + j * PCI_MSIX_ENTRY_SIZE +
-			      PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET);
-		pirq_entry->address_hi_save =
-			readl(base + j * PCI_MSIX_ENTRY_SIZE +
-			      PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET);
-		pirq_entry->data_save =
-			readl(base + j * PCI_MSIX_ENTRY_SIZE +
-			      PCI_MSIX_ENTRY_DATA_OFFSET);
-	}
-	spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
-
-	save_state->cap_nr = PCI_CAP_ID_MSIX;
-	pci_add_saved_cap(dev, save_state);
-	return 0;
-}
-
-void pci_restore_msix_state(struct pci_dev *dev)
-{
-	u16 save;
-	int pos, j;
-	void __iomem *base;
-	struct pci_cap_saved_state *save_state;
-	unsigned long flags;
-	struct msi_dev_list *msi_dev_entry;
-	struct msi_pirq_entry *pirq_entry;
-
-	save_state = pci_find_saved_cap(dev, PCI_CAP_ID_MSIX);
-	if (!save_state)
-		return;
-
-	save = *((u16 *)&save_state->data[0]);
-	pci_remove_saved_cap(save_state);
-	kfree(save_state);
+	int rc;
+	struct physdev_restore_msi restore;
 
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-	if (pos <= 0)
+	if (!dev->msi_enabled && !dev->msix_enabled)
 		return;
 
-	msi_dev_entry = get_msi_dev_pirq_list(dev);
-	base = msi_dev_entry->mask_base;
-
-	spin_lock_irqsave(&msi_dev_entry->pirq_list_lock, flags);
-	list_for_each_entry(pirq_entry, &msi_dev_entry->pirq_list_head, list) {
-		/* route the table */
-		j = pirq_entry->entry_nr;
-		writel(pirq_entry->address_lo_save,
-			base + j * PCI_MSIX_ENTRY_SIZE +
-			PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET);
-		writel(pirq_entry->address_hi_save,
-			base + j * PCI_MSIX_ENTRY_SIZE +
-			PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET);
-		writel(pirq_entry->data_save,
-			base + j * PCI_MSIX_ENTRY_SIZE +
-			PCI_MSIX_ENTRY_DATA_OFFSET);
-	}
-	spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
+	pci_intx(dev, 0);		/* disable intx */
+	if (dev->msi_enabled)
+		msi_set_enable(dev, 0);
+	if (dev->msix_enabled)
+		msix_set_enable(dev, 0);
 
-	pci_write_config_word(dev, msi_control_reg(pos), save);
-	enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
+	restore.bus = dev->bus->number;
+	restore.devfn = dev->devfn;
+	rc = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi, &restore);
+	WARN(rc && rc != -ENOSYS, "restore_msi -> %d\n", rc);
 }
-#endif
+#endif	/* CONFIG_PM */
 
 /**
  * msi_capability_init - configure device's MSI capability structure
@@ -480,6 +300,8 @@ static int msi_capability_init(struct pc
 	int pos, pirq;
 	u16 control;
 
+	msi_set_enable(dev, 0);	/* Ensure msi is disabled as I set it up */
+
 	pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
 	pci_read_config_word(dev, msi_control_reg(pos), &control);
 
@@ -488,7 +310,8 @@ static int msi_capability_init(struct pc
 		return -EBUSY;
 
 	/* Set MSI enabled bits	 */
-	enable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
+	pci_intx(dev, 0);		/* disable intx */
+	msi_set_enable(dev, 1);
 	dev->msi_enabled = 1;
 
 	dev->irq = pirq;
@@ -509,25 +332,20 @@ static int msix_capability_init(struct p
 				struct msix_entry *entries, int nvec)
 {
 	u64 table_base;
-	u16 control;
-	int pirq, i, j, mapped, pos, nr_entries;
+	int pirq, i, j, mapped, pos;
 	struct msi_dev_list *msi_dev_entry = get_msi_dev_pirq_list(dev);
 	struct msi_pirq_entry *pirq_entry;
 
 	if (!msi_dev_entry)
 		return -ENOMEM;
 
+	msix_set_enable(dev, 0);/* Ensure msix is disabled as I set it up */
+
 	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
 	table_base = find_table_base(dev, pos);
 	if (!table_base)
 		return -ENODEV;
 
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	nr_entries = multi_msix_capable(control);
-	if (!msi_dev_entry->mask_base)
-		msi_dev_entry->mask_base = 
-			ioremap_nocache(table_base, nr_entries * PCI_MSIX_ENTRY_SIZE);
-
 	/* MSI-X Table Initialization */
 	for (i = 0; i < nvec; i++) {
 		mapped = 0;
@@ -566,7 +384,8 @@ static int msix_capability_init(struct p
 		return avail;
 	}
 
-	enable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
+	pci_intx(dev, 0);		/* disable intx */
+	msix_set_enable(dev, 1);
 	dev->msix_enabled = 1;
 
 	return 0;
@@ -651,17 +470,14 @@ int pci_enable_msi(struct pci_dev* dev)
 	/* Check whether driver already requested for MSI-X irqs */
 	if (dev->msix_enabled) {
 		printk(KERN_INFO "PCI: %s: Can't enable MSI.  "
-		       "Device already has MSI-X irq assigned\n",
-			   pci_name(dev));
-		dev->irq = temp;
+		       "Device already has MSI-X enabled\n",
+		       pci_name(dev));
 		return -EINVAL;
 	}
 
 	status = msi_capability_init(dev);
 	if ( !status )
 		msi_dev_entry->default_irq = temp;
-	else
-		dev->irq = temp;
 
 	return status;
 }
@@ -669,7 +485,6 @@ int pci_enable_msi(struct pci_dev* dev)
 extern void pci_frontend_disable_msi(struct pci_dev* dev);
 void pci_disable_msi(struct pci_dev* dev)
 {
-	int pos;
 	int pirq;
 	struct msi_dev_list *msi_dev_entry = get_msi_dev_pirq_list(dev);
 
@@ -678,13 +493,11 @@ void pci_disable_msi(struct pci_dev* dev
 	if (!dev)
 		return;
 
+	if (!dev->msi_enabled)
+		return;
+
 #ifdef CONFIG_XEN_PCIDEV_FRONTEND
 	if (!is_initial_xendomain()) {
-		if (!(dev->msi_enabled)) {
-			printk(KERN_INFO "PCI: %s: Device did not enabled MSI.\n",
-			       pci_name(dev));
-			return;
-		}
 		evtchn_map_pirq(dev->irq, 0);
 		pci_frontend_disable_msi(dev);
 		dev->irq = msi_dev_entry->default_irq;
@@ -693,23 +506,15 @@ void pci_disable_msi(struct pci_dev* dev
 	}
 #endif
 
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
-	if (!pos)
-		return;
-
-	if (!(dev->msi_enabled)) {
-		printk(KERN_INFO "PCI: %s: Device did not enabled MSI.\n",
-		       pci_name(dev));
-		return;
-	}
- 
 	pirq = dev->irq;
 	/* Restore dev->irq to its default pin-assertion vector */
 	dev->irq = msi_dev_entry->default_irq;
 	msi_unmap_pirq(dev, pirq);
 
 	/* Disable MSI mode */
-	disable_msi_mode(dev, pos, PCI_CAP_ID_MSI);
+	msi_set_enable(dev, 0);
+	pci_intx(dev, 1);		/* enable intx */
+	dev->msi_enabled = 0;
 }
 
 /**
@@ -804,7 +609,6 @@ int pci_enable_msix(struct pci_dev* dev,
 		printk(KERN_INFO "PCI: %s: Can't enable MSI-X.  "
 		       "Device already has an MSI irq assigned\n",
 		       pci_name(dev));
-		dev->irq = temp;
 		return -EINVAL;
 	}
 
@@ -812,8 +616,6 @@ int pci_enable_msix(struct pci_dev* dev,
 
 	if ( !status )
 		msi_dev_entry->default_irq = temp;
-	else
-		dev->irq = temp;
 
 	return status;
 }
@@ -821,18 +623,13 @@ int pci_enable_msix(struct pci_dev* dev,
 extern void pci_frontend_disable_msix(struct pci_dev* dev);
 void pci_disable_msix(struct pci_dev* dev)
 {
-	int pos;
-	u16 control;
-
 	if (!pci_msi_enable)
 		return;
 	if (!dev)
 		return;
-	if (!dev->msix_enabled) {
-		printk(KERN_INFO "PCI: %s: Device did not enabled MSI-X.\n",
-		       pci_name(dev));
+
+	if (!dev->msix_enabled)
 		return;
-	}
 
 #ifdef CONFIG_XEN_PCIDEV_FRONTEND
 	if (!is_initial_xendomain()) {
@@ -855,18 +652,12 @@ void pci_disable_msix(struct pci_dev* de
 	}
 #endif
 
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-	if (!pos)
-		return;
-
-	pci_read_config_word(dev, msi_control_reg(pos), &control);
-	if (!(control & PCI_MSIX_FLAGS_ENABLE))
-		return;
-
 	msi_remove_pci_irq_vectors(dev);
 
 	/* Disable MSI mode */
-	disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX);
+	msix_set_enable(dev, 0);
+	pci_intx(dev, 1);		/* enable intx */
+	dev->msix_enabled = 0;
 }
 
 /**
@@ -898,8 +689,6 @@ void msi_remove_pci_irq_vectors(struct p
 			kfree(pirq_entry);
 		}
 	spin_unlock_irqrestore(&msi_dev_entry->pirq_list_lock, flags);
-	iounmap(msi_dev_entry->mask_base);
-	msi_dev_entry->mask_base = NULL;
 	dev->irq = msi_dev_entry->default_irq;
 }
 
--- head-2010-04-29.orig/drivers/xen/balloon/sysfs.c	2009-06-09 15:01:37.000000000 +0200
+++ head-2010-04-29/drivers/xen/balloon/sysfs.c	2010-03-24 15:09:08.000000000 +0100
@@ -34,6 +34,7 @@
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <linux/sysdev.h>
+#include <linux/module.h>
 #include "common.h"
 
 #ifdef HAVE_XEN_PLATFORM_COMPAT_H
--- head-2010-04-29.orig/drivers/xen/blkback/xenbus.c	2010-03-22 12:00:53.000000000 +0100
+++ head-2010-04-29/drivers/xen/blkback/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -537,7 +537,6 @@ static const struct xenbus_device_id blk
 
 static struct xenbus_driver blkback = {
 	.name = "vbd",
-	.owner = THIS_MODULE,
 	.ids = blkback_ids,
 	.probe = blkback_probe,
 	.remove = blkback_remove,
@@ -547,5 +546,6 @@ static struct xenbus_driver blkback = {
 
 void blkif_xenbus_init(void)
 {
-	xenbus_register_backend(&blkback);
+	if (xenbus_register_backend(&blkback))
+		BUG();
 }
--- head-2010-04-29.orig/drivers/xen/blkfront/blkfront.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/blkfront/blkfront.c	2010-03-24 15:09:08.000000000 +0100
@@ -928,7 +928,6 @@ MODULE_ALIAS("xen:vbd");
 
 static struct xenbus_driver blkfront = {
 	.name = "vbd",
-	.owner = THIS_MODULE,
 	.ids = blkfront_ids,
 	.probe = blkfront_probe,
 	.remove = blkfront_remove,
--- head-2010-04-29.orig/drivers/xen/blktap/xenbus.c	2010-04-29 09:34:47.000000000 +0200
+++ head-2010-04-29/drivers/xen/blktap/xenbus.c	2010-04-29 09:47:21.000000000 +0200
@@ -478,7 +478,6 @@ static const struct xenbus_device_id blk
 
 static struct xenbus_driver blktap = {
 	.name = "tap",
-	.owner = THIS_MODULE,
 	.ids = blktap_ids,
 	.probe = blktap_probe,
 	.remove = blktap_remove,
@@ -488,5 +487,6 @@ static struct xenbus_driver blktap = {
 
 void tap_blkif_xenbus_init(void)
 {
-	xenbus_register_backend(&blktap);
+	if (xenbus_register_backend(&blktap))
+		BUG();
 }
--- head-2010-04-29.orig/drivers/xen/core/evtchn.c	2010-04-23 14:11:32.000000000 +0200
+++ head-2010-04-29/drivers/xen/core/evtchn.c	2010-03-24 15:09:08.000000000 +0100
@@ -145,7 +145,7 @@ static void bind_evtchn_to_cpu(unsigned 
 	BUG_ON(!test_bit(chn, s->evtchn_mask));
 
 	if (irq != -1)
-		set_native_irq_info(irq, cpumask_of_cpu(cpu));
+		irq_desc[irq].affinity = cpumask_of_cpu(cpu);
 
 	clear_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu_evtchn[chn]]);
 	set_bit(chn, (unsigned long *)cpu_evtchn_mask[cpu]);
@@ -158,7 +158,7 @@ static void init_evtchn_cpu_bindings(voi
 
 	/* By default all event channels notify CPU#0. */
 	for (i = 0; i < NR_IRQS; i++)
-		set_native_irq_info(i, cpumask_of_cpu(0));
+		irq_desc[i].affinity = cpumask_of_cpu(0);
 
 	memset(cpu_evtchn, 0, sizeof(cpu_evtchn));
 	memset(cpu_evtchn_mask[0], ~0, sizeof(cpu_evtchn_mask[0]));
--- head-2010-04-29.orig/drivers/xen/core/smpboot.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/core/smpboot.c	2010-03-24 15:09:08.000000000 +0100
@@ -116,7 +116,7 @@ static int __cpuinit xen_smp_intr_init(u
 	rc = bind_ipi_to_irqhandler(RESCHEDULE_VECTOR,
 				    cpu,
 				    smp_reschedule_interrupt,
-				    SA_INTERRUPT,
+				    IRQF_DISABLED|IRQF_NOBALANCING,
 				    resched_name[cpu],
 				    NULL);
 	if (rc < 0)
@@ -127,7 +127,7 @@ static int __cpuinit xen_smp_intr_init(u
 	rc = bind_ipi_to_irqhandler(CALL_FUNCTION_VECTOR,
 				    cpu,
 				    smp_call_function_interrupt,
-				    SA_INTERRUPT,
+				    IRQF_DISABLED|IRQF_NOBALANCING,
 				    callfunc_name[cpu],
 				    NULL);
 	if (rc < 0)
@@ -256,7 +256,7 @@ void __init smp_prepare_cpus(unsigned in
 {
 	unsigned int cpu;
 	struct task_struct *idle;
-	int apicid, acpiid;
+	int apicid;
 	struct vcpu_get_physid cpu_id;
 #ifdef __x86_64__
 	struct desc_ptr *gdt_descr;
@@ -265,14 +265,8 @@ void __init smp_prepare_cpus(unsigned in
 #endif
 
 	apicid = 0;
-	if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0) {
+	if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, 0, &cpu_id) == 0)
 		apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
-		acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id);
-#ifdef CONFIG_ACPI
-		if (acpiid != 0xff)
-			x86_acpiid_to_apicid[acpiid] = apicid;
-#endif
-	}
 	boot_cpu_data.apicid = apicid;
 	cpu_data[0] = boot_cpu_data;
 
@@ -328,14 +322,8 @@ void __init smp_prepare_cpus(unsigned in
 			XENFEAT_writable_descriptor_tables);
 
 		apicid = cpu;
-		if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0) {
+		if (HYPERVISOR_vcpu_op(VCPUOP_get_physid, cpu, &cpu_id) == 0)
 			apicid = xen_vcpu_physid_to_x86_apicid(cpu_id.phys_id);
-			acpiid = xen_vcpu_physid_to_x86_acpiid(cpu_id.phys_id);
-#ifdef CONFIG_ACPI
-			if (acpiid != 0xff)
-				x86_acpiid_to_apicid[acpiid] = apicid;
-#endif
-		}
 		cpu_data[cpu] = boot_cpu_data;
 		cpu_data[cpu].apicid = apicid;
 
--- head-2010-04-29.orig/drivers/xen/fbfront/xenfb.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/fbfront/xenfb.c	2010-03-24 15:09:08.000000000 +0100
@@ -857,7 +857,6 @@ MODULE_ALIAS("xen:vfb");
 
 static struct xenbus_driver xenfb_driver = {
 	.name = "vfb",
-	.owner = THIS_MODULE,
 	.ids = xenfb_ids,
 	.probe = xenfb_probe,
 	.remove = xenfb_remove,
--- head-2010-04-29.orig/drivers/xen/fbfront/xenkbd.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/drivers/xen/fbfront/xenkbd.c	2010-03-24 15:09:08.000000000 +0100
@@ -323,7 +323,6 @@ MODULE_ALIAS("xen:vkbd");
 
 static struct xenbus_driver xenkbd_driver = {
 	.name = "vkbd",
-	.owner = THIS_MODULE,
 	.ids = xenkbd_ids,
 	.probe = xenkbd_probe,
 	.remove = xenkbd_remove,
--- head-2010-04-29.orig/drivers/xen/netback/interface.c	2010-01-04 11:56:34.000000000 +0100
+++ head-2010-04-29/drivers/xen/netback/interface.c	2010-03-24 15:09:08.000000000 +0100
@@ -121,7 +121,7 @@ static void netbk_get_drvinfo(struct net
 			      struct ethtool_drvinfo *info)
 {
 	strcpy(info->driver, "netbk");
-	strcpy(info->bus_info, dev->class_dev.dev->bus_id);
+	strcpy(info->bus_info, dev->dev.parent->bus_id);
 }
 
 static const struct netif_stat {
--- head-2010-04-29.orig/drivers/xen/netback/xenbus.c	2009-03-18 10:39:32.000000000 +0100
+++ head-2010-04-29/drivers/xen/netback/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -439,7 +439,6 @@ static const struct xenbus_device_id net
 
 static struct xenbus_driver netback = {
 	.name = "vif",
-	.owner = THIS_MODULE,
 	.ids = netback_ids,
 	.probe = netback_probe,
 	.remove = netback_remove,
@@ -450,5 +449,6 @@ static struct xenbus_driver netback = {
 
 void netif_xenbus_init(void)
 {
-	xenbus_register_backend(&netback);
+	if (xenbus_register_backend(&netback))
+		BUG();
 }
--- head-2010-04-29.orig/drivers/xen/netfront/netfront.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/drivers/xen/netfront/netfront.c	2010-03-24 15:09:08.000000000 +0100
@@ -1892,20 +1892,19 @@ static struct ethtool_ops network_ethtoo
 };
 
 #ifdef CONFIG_SYSFS
-static ssize_t show_rxbuf_min(struct class_device *cd, char *buf)
+static ssize_t show_rxbuf_min(struct device *dev,
+			      struct device_attribute *attr, char *buf)
 {
-	struct net_device *netdev = container_of(cd, struct net_device,
-						 class_dev);
-	struct netfront_info *info = netdev_priv(netdev);
+	struct netfront_info *info = netdev_priv(to_net_dev(dev));
 
 	return sprintf(buf, "%u\n", info->rx_min_target);
 }
 
-static ssize_t store_rxbuf_min(struct class_device *cd,
+static ssize_t store_rxbuf_min(struct device *dev,
+			       struct device_attribute *attr,
 			       const char *buf, size_t len)
 {
-	struct net_device *netdev = container_of(cd, struct net_device,
-						 class_dev);
+	struct net_device *netdev = to_net_dev(dev);
 	struct netfront_info *np = netdev_priv(netdev);
 	char *endp;
 	unsigned long target;
@@ -1935,20 +1934,19 @@ static ssize_t store_rxbuf_min(struct cl
 	return len;
 }
 
-static ssize_t show_rxbuf_max(struct class_device *cd, char *buf)
+static ssize_t show_rxbuf_max(struct device *dev,
+			      struct device_attribute *attr, char *buf)
 {
-	struct net_device *netdev = container_of(cd, struct net_device,
-						 class_dev);
-	struct netfront_info *info = netdev_priv(netdev);
+	struct netfront_info *info = netdev_priv(to_net_dev(dev));
 
 	return sprintf(buf, "%u\n", info->rx_max_target);
 }
 
-static ssize_t store_rxbuf_max(struct class_device *cd,
+static ssize_t store_rxbuf_max(struct device *dev,
+			       struct device_attribute *attr,
 			       const char *buf, size_t len)
 {
-	struct net_device *netdev = container_of(cd, struct net_device,
-						 class_dev);
+	struct net_device *netdev = to_net_dev(dev);
 	struct netfront_info *np = netdev_priv(netdev);
 	char *endp;
 	unsigned long target;
@@ -1978,16 +1976,15 @@ static ssize_t store_rxbuf_max(struct cl
 	return len;
 }
 
-static ssize_t show_rxbuf_cur(struct class_device *cd, char *buf)
+static ssize_t show_rxbuf_cur(struct device *dev,
+			      struct device_attribute *attr, char *buf)
 {
-	struct net_device *netdev = container_of(cd, struct net_device,
-						 class_dev);
-	struct netfront_info *info = netdev_priv(netdev);
+	struct netfront_info *info = netdev_priv(to_net_dev(dev));
 
 	return sprintf(buf, "%u\n", info->rx_target);
 }
 
-static const struct class_device_attribute xennet_attrs[] = {
+static struct device_attribute xennet_attrs[] = {
 	__ATTR(rxbuf_min, S_IRUGO|S_IWUSR, show_rxbuf_min, store_rxbuf_min),
 	__ATTR(rxbuf_max, S_IRUGO|S_IWUSR, show_rxbuf_max, store_rxbuf_max),
 	__ATTR(rxbuf_cur, S_IRUGO, show_rxbuf_cur, NULL),
@@ -1999,8 +1996,8 @@ static int xennet_sysfs_addif(struct net
 	int error = 0;
 
 	for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++) {
-		error = class_device_create_file(&netdev->class_dev, 
-						 &xennet_attrs[i]);
+		error = device_create_file(&netdev->dev,
+					   &xennet_attrs[i]);
 		if (error)
 			goto fail;
 	}
@@ -2008,8 +2005,7 @@ static int xennet_sysfs_addif(struct net
 
  fail:
 	while (--i >= 0)
-		class_device_remove_file(&netdev->class_dev,
-					 &xennet_attrs[i]);
+		device_remove_file(&netdev->dev, &xennet_attrs[i]);
 	return error;
 }
 
@@ -2017,10 +2013,8 @@ static void xennet_sysfs_delif(struct ne
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++) {
-		class_device_remove_file(&netdev->class_dev,
-					 &xennet_attrs[i]);
-	}
+	for (i = 0; i < ARRAY_SIZE(xennet_attrs); i++)
+		device_remove_file(&netdev->dev, &xennet_attrs[i]);
 }
 
 #endif /* CONFIG_SYSFS */
@@ -2186,7 +2180,6 @@ MODULE_ALIAS("xen:vif");
 
 static struct xenbus_driver netfront_driver = {
 	.name = "vif",
-	.owner = THIS_MODULE,
 	.ids = netfront_ids,
 	.probe = netfront_probe,
 	.remove = __devexit_p(netfront_remove),
--- head-2010-04-29.orig/drivers/xen/pciback/xenbus.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/pciback/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -683,7 +683,6 @@ static const struct xenbus_device_id xen
 
 static struct xenbus_driver xenbus_pciback_driver = {
 	.name 			= "pciback",
-	.owner 			= THIS_MODULE,
 	.ids 			= xenpci_ids,
 	.probe 			= pciback_xenbus_probe,
 	.remove 		= pciback_xenbus_remove,
--- head-2010-04-29.orig/drivers/xen/pcifront/xenbus.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/pcifront/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -449,7 +449,6 @@ MODULE_ALIAS("xen:pci");
 
 static struct xenbus_driver xenbus_pcifront_driver = {
 	.name 			= "pcifront",
-	.owner 			= THIS_MODULE,
 	.ids 			= xenpci_ids,
 	.probe 			= pcifront_xenbus_probe,
 	.remove 		= pcifront_xenbus_remove,
--- head-2010-04-29.orig/drivers/xen/scsiback/xenbus.c	2009-03-18 10:39:32.000000000 +0100
+++ head-2010-04-29/drivers/xen/scsiback/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -360,7 +360,6 @@ static struct xenbus_device_id scsiback_
 
 static struct xenbus_driver scsiback = {
 	.name			= "vscsi",
-	.owner			= THIS_MODULE,
 	.ids			= scsiback_ids,
 	.probe			= scsiback_probe,
 	.remove			= scsiback_remove,
--- head-2010-04-29.orig/drivers/xen/scsifront/xenbus.c	2010-03-31 09:56:02.000000000 +0200
+++ head-2010-04-29/drivers/xen/scsifront/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -401,7 +401,6 @@ MODULE_ALIAS("xen:vscsi");
 
 static struct xenbus_driver scsifront_driver = {
 	.name			= "vscsi",
-	.owner			= THIS_MODULE,
 	.ids			= scsifront_ids,
 	.probe			= scsifront_probe,
 	.remove			= scsifront_remove,
--- head-2010-04-29.orig/drivers/xen/tpmback/common.h	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/drivers/xen/tpmback/common.h	2010-03-24 15:09:08.000000000 +0100
@@ -54,11 +54,11 @@ typedef struct tpmif_st {
 
 void tpmif_disconnect_complete(tpmif_t * tpmif);
 tpmif_t *tpmif_find(domid_t domid, struct backend_info *bi);
-void tpmif_interface_init(void);
+int tpmif_interface_init(void);
 void tpmif_interface_exit(void);
 void tpmif_schedule_work(tpmif_t * tpmif);
 void tpmif_deschedule_work(tpmif_t * tpmif);
-void tpmif_xenbus_init(void);
+int tpmif_xenbus_init(void);
 void tpmif_xenbus_exit(void);
 int tpmif_map(tpmif_t *tpmif, unsigned long shared_page, unsigned int evtchn);
 irqreturn_t tpmif_be_int(int irq, void *dev_id);
--- head-2010-04-29.orig/drivers/xen/tpmback/interface.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/tpmback/interface.c	2010-03-24 15:09:08.000000000 +0100
@@ -160,13 +160,14 @@ void tpmif_disconnect_complete(tpmif_t *
 	free_tpmif(tpmif);
 }
 
-void __init tpmif_interface_init(void)
+int __init tpmif_interface_init(void)
 {
 	tpmif_cachep = kmem_cache_create("tpmif_cache", sizeof (tpmif_t),
 					 0, 0, NULL, NULL);
+	return tpmif_cachep ? 0 : -ENOMEM;
 }
 
-void __exit tpmif_interface_exit(void)
+void tpmif_interface_exit(void)
 {
 	kmem_cache_destroy(tpmif_cachep);
 }
--- head-2010-04-29.orig/drivers/xen/tpmback/tpmback.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/drivers/xen/tpmback/tpmback.c	2010-03-24 15:09:08.000000000 +0100
@@ -928,22 +928,30 @@ static int __init tpmback_init(void)
 	spin_lock_init(&tpm_schedule_list_lock);
 	INIT_LIST_HEAD(&tpm_schedule_list);
 
-	tpmif_interface_init();
-	tpmif_xenbus_init();
+	rc = tpmif_interface_init();
+	if (!rc) {
+		rc = tpmif_xenbus_init();
+		if (rc)
+			tpmif_interface_exit();
+	}
+	if (rc) {
+		misc_deregister(&vtpms_miscdevice);
+		return rc;
+	}
 
 	printk(KERN_ALERT "Successfully initialized TPM backend driver.\n");
 
 	return 0;
 }
-
 module_init(tpmback_init);
 
-void __exit tpmback_exit(void)
+static void __exit tpmback_exit(void)
 {
 	vtpm_release_packets(NULL, 0);
 	tpmif_xenbus_exit();
 	tpmif_interface_exit();
 	misc_deregister(&vtpms_miscdevice);
 }
+module_exit(tpmback_exit)
 
 MODULE_LICENSE("Dual BSD/GPL");
--- head-2010-04-29.orig/drivers/xen/tpmback/xenbus.c	2008-03-06 08:54:32.000000000 +0100
+++ head-2010-04-29/drivers/xen/tpmback/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -270,7 +270,6 @@ static const struct xenbus_device_id tpm
 
 static struct xenbus_driver tpmback = {
 	.name = "vtpm",
-	.owner = THIS_MODULE,
 	.ids = tpmback_ids,
 	.probe = tpmback_probe,
 	.remove = tpmback_remove,
@@ -278,9 +277,9 @@ static struct xenbus_driver tpmback = {
 };
 
 
-void tpmif_xenbus_init(void)
+int tpmif_xenbus_init(void)
 {
-	xenbus_register_backend(&tpmback);
+	return xenbus_register_backend(&tpmback);
 }
 
 void tpmif_xenbus_exit(void)
--- head-2010-04-29.orig/drivers/xen/usbback/xenbus.c	2009-11-06 10:23:23.000000000 +0100
+++ head-2010-04-29/drivers/xen/usbback/xenbus.c	2010-03-24 15:09:08.000000000 +0100
@@ -320,7 +320,6 @@ static const struct xenbus_device_id usb
 
 static struct xenbus_driver usbback_driver = {
 	.name = "vusb",
-	.owner = THIS_MODULE,
 	.ids = usbback_ids,
 	.probe = usbback_probe,
 	.otherend_changed = frontend_changed,
--- head-2010-04-29.orig/drivers/xen/usbfront/xenbus.c	2010-03-31 09:56:02.000000000 +0200
+++ head-2010-04-29/drivers/xen/usbfront/xenbus.c	2010-04-15 09:53:24.000000000 +0200
@@ -381,7 +381,6 @@ MODULE_ALIAS("xen:vusb");
 
 static struct xenbus_driver usbfront_driver = {
 	.name = "vusb",
-	.owner = THIS_MODULE,
 	.ids = usbfront_ids,
 	.probe = usbfront_probe,
 	.otherend_changed = backend_changed,
--- head-2010-04-29.orig/drivers/xen/xenbus/xenbus_probe.c	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/drivers/xen/xenbus/xenbus_probe.c	2010-03-24 15:09:08.000000000 +0100
@@ -375,7 +375,9 @@ static void xenbus_dev_shutdown(struct d
 }
 
 int xenbus_register_driver_common(struct xenbus_driver *drv,
-				  struct xen_bus_type *bus)
+				  struct xen_bus_type *bus,
+				  struct module *owner,
+				  const char *mod_name)
 {
 	int ret;
 
@@ -385,7 +387,10 @@ int xenbus_register_driver_common(struct
 	drv->driver.name = drv->name;
 	drv->driver.bus = &bus->bus;
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10)
-	drv->driver.owner = drv->owner;
+	drv->driver.owner = owner;
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,21)
+	drv->driver.mod_name = mod_name;
 #endif
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16)
 	drv->driver.probe = xenbus_dev_probe;
@@ -399,13 +404,15 @@ int xenbus_register_driver_common(struct
 	return ret;
 }
 
-int xenbus_register_frontend(struct xenbus_driver *drv)
+int __xenbus_register_frontend(struct xenbus_driver *drv,
+			       struct module *owner, const char *mod_name)
 {
 	int ret;
 
 	drv->read_otherend_details = read_backend_details;
 
-	ret = xenbus_register_driver_common(drv, &xenbus_frontend);
+	ret = xenbus_register_driver_common(drv, &xenbus_frontend,
+					    owner, mod_name);
 	if (ret)
 		return ret;
 
@@ -414,7 +421,7 @@ int xenbus_register_frontend(struct xenb
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(xenbus_register_frontend);
+EXPORT_SYMBOL_GPL(__xenbus_register_frontend);
 
 void xenbus_unregister_driver(struct xenbus_driver *drv)
 {
--- head-2010-04-29.orig/drivers/xen/xenbus/xenbus_probe.h	2010-01-19 16:01:04.000000000 +0100
+++ head-2010-04-29/drivers/xen/xenbus/xenbus_probe.h	2010-03-24 15:09:08.000000000 +0100
@@ -69,7 +69,9 @@ extern int xenbus_match(struct device *_
 extern int xenbus_dev_probe(struct device *_dev);
 extern int xenbus_dev_remove(struct device *_dev);
 extern int xenbus_register_driver_common(struct xenbus_driver *drv,
-					 struct xen_bus_type *bus);
+					 struct xen_bus_type *bus,
+					 struct module *owner,
+					 const char *mod_name);
 extern int xenbus_probe_node(struct xen_bus_type *bus,
 			     const char *type,
 			     const char *nodename);
--- head-2010-04-29.orig/drivers/xen/xenbus/xenbus_probe_backend.c	2008-01-21 11:15:26.000000000 +0100
+++ head-2010-04-29/drivers/xen/xenbus/xenbus_probe_backend.c	2010-03-24 15:09:08.000000000 +0100
@@ -172,13 +172,15 @@ static int xenbus_uevent_backend(struct 
 	return 0;
 }
 
-int xenbus_register_backend(struct xenbus_driver *drv)
+int __xenbus_register_backend(struct xenbus_driver *drv,
+			       struct module *owner, const char *mod_name)
 {
 	drv->read_otherend_details = read_frontend_details;
 
-	return xenbus_register_driver_common(drv, &xenbus_backend);
+	return xenbus_register_driver_common(drv, &xenbus_backend,
+					     owner, mod_name);
 }
-EXPORT_SYMBOL_GPL(xenbus_register_backend);
+EXPORT_SYMBOL_GPL(__xenbus_register_backend);
 
 /* backend/<typename>/<frontend-uuid>/<name> */
 static int xenbus_probe_backend_unit(const char *dir,
--- head-2010-04-29.orig/drivers/xen/xenoprof/xenoprofile.c	2010-03-24 15:06:12.000000000 +0100
+++ head-2010-04-29/drivers/xen/xenoprof/xenoprofile.c	2010-03-24 15:09:08.000000000 +0100
@@ -235,7 +235,7 @@ static int bind_virq(void)
 		result = bind_virq_to_irqhandler(VIRQ_XENOPROF,
 						 i,
 						 xenoprof_ovf_interrupt,
-						 SA_INTERRUPT,
+						 IRQF_DISABLED|IRQF_NOBALANCING,
 						 "xenoprof",
 						 NULL);
 
--- head-2010-04-29.orig/arch/x86/include/asm/i8253.h	2010-04-29 09:29:50.000000000 +0200
+++ head-2010-04-29/arch/x86/include/asm/i8253.h	2010-03-24 15:09:08.000000000 +0100
@@ -8,10 +8,14 @@
 
 extern spinlock_t i8253_lock;
 
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+
 extern struct clock_event_device *global_clock_event;
 
 extern void setup_pit_timer(void);
 
+#endif
+
 #define inb_pit		inb_p
 #define outb_pit	outb_p
 
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/desc_32.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/desc_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -21,7 +21,7 @@ struct Xgt_desc_struct {
 
 extern struct Xgt_desc_struct idt_descr;
 DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr);
-
+extern struct Xgt_desc_struct early_gdt_descr;
 
 static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 {
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/hypervisor.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/hypervisor.h	2010-03-24 15:09:08.000000000 +0100
@@ -160,6 +160,19 @@ static inline void arch_leave_lazy_mmu_m
 #define arch_use_lazy_mmu_mode() unlikely(__get_cpu_var(xen_lazy_mmu))
 #endif
 
+#if 0 /* All uses are in places potentially called asynchronously, but
+       * asynchronous code should rather not make use of lazy mode at all.
+       * Therefore, all uses of this function get commented out, proper
+       * detection of asynchronous invocations is added whereever needed,
+       * and this function is disabled to catch any new (improper) uses.
+       */
+static inline void arch_flush_lazy_mmu_mode(void)
+{
+	if (arch_use_lazy_mmu_mode())
+		xen_multicall_flush(false);
+}
+#endif
+
 #else /* !CONFIG_XEN || MODULE */
 
 static inline void xen_multicall_flush(bool ignore) {}
@@ -217,7 +230,7 @@ HYPERVISOR_block(
 	return rc;
 }
 
-static inline void /*__noreturn*/
+static inline void __noreturn
 HYPERVISOR_shutdown(
 	unsigned int reason)
 {
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/irqflags_32.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/irqflags_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -108,7 +108,7 @@ sysexit_scrit:	/**** START OF SYSEXIT CR
 sysexit_ecrit:	/**** END OF SYSEXIT CRITICAL REGION ****/		; \
 	mov  $__KERNEL_PDA, %ecx					; \
 	push %esp							; \
-	mov  %ecx, %gs							; \
+	mov  %ecx, %fs							; \
 	call evtchn_do_upcall						; \
 	add  $4,%esp							; \
 	jmp  ret_from_intr
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/mmu_context_32.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/mmu_context_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -27,13 +27,13 @@ static inline void enter_lazy_tlb(struct
 static inline void __prepare_arch_switch(void)
 {
 	/*
-	 * Save away %fs. No need to save %gs, as it was saved on the
+	 * Save away %gs. No need to save %fs, as it was saved on the
 	 * stack on entry.  No need to save %es and %ds, as those are
 	 * always kernel segments while inside the kernel.
 	 */
-	asm volatile ( "mov %%fs,%0"
-		: "=m" (current->thread.fs));
-	asm volatile ( "movl %0,%%fs"
+	asm volatile ( "mov %%gs,%0"
+		: "=m" (current->thread.gs));
+	asm volatile ( "movl %0,%%gs"
 		: : "r" (0) );
 }
 
@@ -95,7 +95,7 @@ static inline void switch_mm(struct mm_s
 }
 
 #define deactivate_mm(tsk, mm)			\
-	asm("movl %0,%%fs": :"r" (0));
+	asm("movl %0,%%gs": :"r" (0));
 
 static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
 {
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/pgalloc_32.h	2008-07-21 11:00:33.000000000 +0200
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/pgalloc_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -6,12 +6,23 @@
 #include <linux/mm.h>		/* for struct page */
 #include <asm/io.h>		/* for phys_to_virt and page_to_pseudophys */
 
-#define pmd_populate_kernel(mm, pmd, pte) \
-		set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
+#define paravirt_alloc_pt(pfn) do { } while (0)
+#define paravirt_alloc_pd(pfn) do { } while (0)
+#define paravirt_alloc_pd(pfn) do { } while (0)
+#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
+#define paravirt_release_pt(pfn) do { } while (0)
+#define paravirt_release_pd(pfn) do { } while (0)
+
+#define pmd_populate_kernel(mm, pmd, pte)			\
+do {								\
+	paravirt_alloc_pt(__pa(pte) >> PAGE_SHIFT);		\
+	set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)));		\
+} while (0)
 
 #define pmd_populate(mm, pmd, pte) 					\
 do {									\
 	unsigned long pfn = page_to_pfn(pte);				\
+	paravirt_alloc_pt(pfn);						\
 	if (test_bit(PG_pinned, &virt_to_page((mm)->pgd)->flags)) {	\
 		if (!PageHighMem(pte))					\
 			BUG_ON(HYPERVISOR_update_va_mapping(		\
@@ -42,7 +53,11 @@ static inline void pte_free_kernel(pte_t
 
 extern void pte_free(struct page *pte);
 
-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+#define __pte_free_tlb(tlb,pte) 					\
+do {									\
+	paravirt_release_pt(page_to_pfn(pte));				\
+	tlb_remove_page((tlb),(pte));					\
+} while (0)
 
 #ifdef CONFIG_X86_PAE
 /*
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/pgtable_32.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/pgtable_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -275,6 +275,7 @@ static inline pte_t pte_mkhuge(pte_t pte
  */
 #define pte_update(mm, addr, ptep)		do { } while (0)
 #define pte_update_defer(mm, addr, ptep)	do { } while (0)
+#define paravirt_map_pt_hook(slot, va, pfn)	do { } while (0)
 
 /*
  * We only update the dirty/accessed state if we set
@@ -490,12 +491,24 @@ extern pte_t *lookup_address(unsigned lo
 #endif
 
 #if defined(CONFIG_HIGHPTE)
-#define pte_offset_map(dir, address) \
-	((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE0) + \
-	 pte_index(address))
-#define pte_offset_map_nested(dir, address) \
-	((pte_t *)kmap_atomic_pte(pmd_page(*(dir)),KM_PTE1) + \
-	 pte_index(address))
+#define pte_offset_map(dir, address)				\
+({								\
+	pte_t *__ptep;						\
+	unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT;		\
+	__ptep = (pte_t *)kmap_atomic_pte(pfn_to_page(pfn),KM_PTE0); \
+	paravirt_map_pt_hook(KM_PTE0,__ptep, pfn);		\
+	__ptep = __ptep + pte_index(address);			\
+	__ptep;							\
+})
+#define pte_offset_map_nested(dir, address)			\
+({								\
+	pte_t *__ptep;						\
+	unsigned pfn = pmd_val(*(dir)) >> PAGE_SHIFT;		\
+	__ptep = (pte_t *)kmap_atomic_pte(pfn_to_page(pfn),KM_PTE1); \
+	paravirt_map_pt_hook(KM_PTE1,__ptep, pfn);		\
+	__ptep = __ptep + pte_index(address);			\
+	__ptep;							\
+})
 #define pte_unmap(pte) kunmap_atomic(pte, KM_PTE0)
 #define pte_unmap_nested(pte) kunmap_atomic(pte, KM_PTE1)
 #else
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/processor_32.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/processor_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -431,7 +431,7 @@ struct thread_struct {
 	.vm86_info = NULL,						\
 	.sysenter_cs = __KERNEL_CS,					\
 	.io_bitmap_ptr = NULL,						\
-	.gs = __KERNEL_PDA,						\
+	.fs = __KERNEL_PDA,						\
 }
 
 /*
@@ -449,8 +449,8 @@ struct thread_struct {
 }
 
 #define start_thread(regs, new_eip, new_esp) do {		\
-	__asm__("movl %0,%%fs": :"r" (0));			\
-	regs->xgs = 0;						\
+	__asm__("movl %0,%%gs": :"r" (0));			\
+	regs->xfs = 0;						\
 	set_fs(USER_DS);					\
 	regs->xds = __USER_DS;					\
 	regs->xes = __USER_DS;					\
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/smp_32.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/smp_32.h	2010-03-24 15:09:08.000000000 +0100
@@ -52,6 +52,11 @@ extern void cpu_exit_clear(void);
 extern void cpu_uninit(void);
 #endif
 
+#ifndef CONFIG_PARAVIRT
+#define startup_ipi_hook(phys_apicid, start_eip, start_esp) 		\
+do { } while (0)
+#endif
+
 /*
  * This function is needed by all SMP systems. It must _always_ be valid
  * from the initial startup. We map APIC_BASE very early in page_setup(),
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/pgtable_64.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/pgtable_64.h	2010-03-24 15:09:08.000000000 +0100
@@ -416,15 +416,6 @@ static inline int pmd_large(pmd_t pte) {
 #define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))
 #define mk_pte_huge(entry) (__pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE)
  
-/* physical address -> PTE */
-static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
-{ 
-	unsigned long pteval;
-	pteval = physpage | pgprot_val(pgprot);
-	pteval &= __supported_pte_mask;
-	return __pte(pteval);
-}
- 
 /* Change flags of a PTE */
 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 { 
--- head-2010-04-29.orig/arch/x86/include/mach-xen/asm/smp_64.h	2010-03-24 15:08:58.000000000 +0100
+++ head-2010-04-29/arch/x86/include/mach-xen/asm/smp_64.h	2010-03-24 15:09:08.000000000 +0100
@@ -7,6 +7,7 @@
 #include <linux/threads.h>
 #include <linux/cpumask.h>
 #include <linux/bitops.h>
+#include <linux/init.h>
 extern int disable_apic;
 
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -73,7 +74,7 @@ extern int __cpu_disable(void);
 extern void __cpu_die(unsigned int cpu);
 extern void prefill_possible_map(void);
 extern unsigned num_processors;
-extern unsigned disabled_cpus;
+extern unsigned __cpuinitdata disabled_cpus;
 
 #define NO_PROC_ID		0xFF		/* No processor magic marker */
 
--- head-2010-04-29.orig/include/xen/xenbus.h	2010-01-19 16:01:04.000000000 +0100
+++ head-2010-04-29/include/xen/xenbus.h	2010-03-24 15:09:08.000000000 +0100
@@ -93,8 +93,7 @@ struct xenbus_device_id
 
 /* A xenbus driver. */
 struct xenbus_driver {
-	char *name;
-	struct module *owner;
+	const char *name;
 	const struct xenbus_device_id *ids;
 	int (*probe)(struct xenbus_device *dev,
 		     const struct xenbus_device_id *id);
@@ -115,8 +114,25 @@ static inline struct xenbus_driver *to_x
 	return container_of(drv, struct xenbus_driver, driver);
 }
 
-int xenbus_register_frontend(struct xenbus_driver *drv);
-int xenbus_register_backend(struct xenbus_driver *drv);
+int __must_check __xenbus_register_frontend(struct xenbus_driver *drv,
+					    struct module *owner,
+					    const char *mod_name);
+
+static inline int __must_check
+xenbus_register_frontend(struct xenbus_driver *drv)
+{
+	return __xenbus_register_frontend(drv, THIS_MODULE, KBUILD_MODNAME);
+}
+
+int __must_check __xenbus_register_backend(struct xenbus_driver *drv,
+					   struct module *owner,
+					   const char *mod_name);
+static inline int __must_check
+xenbus_register_backend(struct xenbus_driver *drv)
+{
+	return __xenbus_register_backend(drv, THIS_MODULE, KBUILD_MODNAME);
+}
+
 void xenbus_unregister_driver(struct xenbus_driver *drv);
 
 struct xenbus_transaction
--- head-2010-04-29.orig/lib/swiotlb-xen.c	2009-04-07 13:58:49.000000000 +0200
+++ head-2010-04-29/lib/swiotlb-xen.c	2010-03-24 15:09:08.000000000 +0100
@@ -135,8 +135,8 @@ __setup("swiotlb=", setup_io_tlb_npages)
  * Statically reserve bounce buffer space and initialize bounce buffer data
  * structures for the software IO TLB used to implement the PCI DMA API.
  */
-void
-swiotlb_init_with_default_size (size_t default_size)
+void __init
+swiotlb_init_with_default_size(size_t default_size)
 {
 	unsigned long i, bytes;
 	int rc;
@@ -221,7 +221,7 @@ swiotlb_init_with_default_size (size_t d
 	       dma_bits);
 }
 
-void
+void __init
 swiotlb_init(void)
 {
 	long ram_end;
@@ -457,8 +457,8 @@ swiotlb_full(struct device *dev, size_t 
 	 * When the mapping is small enough return a static buffer to limit
 	 * the damage, or panic when the transfer is too big.
 	 */
-	printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %lu bytes at "
-	       "device %s\n", (unsigned long)size, dev ? dev->bus_id : "?");
+	printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %zu bytes at "
+	       "device %s\n", size, dev ? dev->bus_id : "?");
 
 	if (size > io_tlb_overflow && do_panic) {
 		if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)
@@ -602,7 +602,7 @@ swiotlb_map_sg(struct device *hwdev, str
 				sg[0].dma_length = 0;
 				return 0;
 			}
-			sg->dma_address = (dma_addr_t)virt_to_bus(map);
+			sg->dma_address = virt_to_bus(map);
 		} else
 			sg->dma_address = dev_addr;
 		sg->dma_length = sg->length;
@@ -624,8 +624,7 @@ swiotlb_unmap_sg(struct device *hwdev, s
 
 	for (i = 0; i < nelems; i++, sg++)
 		if (in_swiotlb_aperture(sg->dma_address))
-			unmap_single(hwdev, 
-				     (void *)bus_to_virt(sg->dma_address),
+			unmap_single(hwdev, bus_to_virt(sg->dma_address),
 				     sg->dma_length, dir);
 		else
 			gnttab_dma_unmap_page(sg->dma_address);
@@ -648,8 +647,7 @@ swiotlb_sync_sg_for_cpu(struct device *h
 
 	for (i = 0; i < nelems; i++, sg++)
 		if (in_swiotlb_aperture(sg->dma_address))
-			sync_single(hwdev,
-				    (void *)bus_to_virt(sg->dma_address),
+			sync_single(hwdev, bus_to_virt(sg->dma_address),
 				    sg->dma_length, dir);
 }
 
@@ -663,8 +661,7 @@ swiotlb_sync_sg_for_device(struct device
 
 	for (i = 0; i < nelems; i++, sg++)
 		if (in_swiotlb_aperture(sg->dma_address))
-			sync_single(hwdev,
-				    (void *)bus_to_virt(sg->dma_address),
+			sync_single(hwdev, bus_to_virt(sg->dma_address),
 				    sg->dma_length, dir);
 }