i386: move xen

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

21 files changed, 4 insertions, 4202 deletions

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 561cc21914b..0f6186f0303 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -226,7 +226,7 @@ config PARAVIRT
 	  However, when run without a hypervisor the kernel is
 	  theoretically slower.  If in doubt, say N.
 
-source "arch/i386/xen/Kconfig"
+source "arch/x86/xen/Kconfig"
 
 config VMI
 	bool "VMI Paravirt-ops support"
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index c462803a4db..fc85d6674fc 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -94,7 +94,7 @@ mcore-$(CONFIG_X86_ES7000)	:= arch/x86/mach-default
 core-$(CONFIG_X86_ES7000)	:= arch/x86/mach-es7000/
 
 # Xen paravirtualization support
-core-$(CONFIG_XEN)		+= arch/i386/xen/
+core-$(CONFIG_XEN)		+= arch/x86/xen/
 
 # default subarch .h files
 mflags-y += -Iinclude/asm-i386/mach-default
diff --git a/arch/i386/kernel/head_32.S b/arch/i386/kernel/head_32.S
index 8f0382161c9..9150ca9b5f8 100644
--- a/arch/i386/kernel/head_32.S
+++ b/arch/i386/kernel/head_32.S
@@ -537,7 +537,7 @@ fault_msg:
 	.ascii "Int %d: CR2 %p  err %p  EIP %p  CS %p  flags %p\n"
 	.asciz "Stack: %p %p %p %p %p %p %p %p\n"
 
-#include "../xen/xen-head.S"
+#include "../../x86/xen/xen-head.S"
 
 /*
  * The IDT and GDT 'descriptors' are a strange 48-bit object
diff --git a/arch/i386/kernel/vsyscall-note_32.S b/arch/i386/kernel/vsyscall-note_32.S
index 07c0daf7823..fcf376a37f7 100644
--- a/arch/i386/kernel/vsyscall-note_32.S
+++ b/arch/i386/kernel/vsyscall-note_32.S
@@ -33,7 +33,7 @@ ELFNOTE_END
  * at boot time we set VDSO_NOTE_NONEGSEG_BIT if running under Xen.
  */
 
-#include "../xen/vdso.h"	/* Defines VDSO_NOTE_NONEGSEG_BIT.  */
+#include "../../x86/xen/vdso.h"	/* Defines VDSO_NOTE_NONEGSEG_BIT.  */
 
 	.globl VDSO_NOTE_MASK
 ELFNOTE_START(GNU, 2, "a")
diff --git a/arch/i386/xen/Kconfig b/arch/i386/xen/Kconfig
deleted file mode 100644
index 9df99e1885a..00000000000
--- a/arch/i386/xen/Kconfig
+++ /dev/null
@@ -1,11 +0,0 @@
-#
-# This Kconfig describes xen options
-#
-
-config XEN
-	bool "Enable support for Xen hypervisor"
-	depends on PARAVIRT && X86_CMPXCHG && X86_TSC && !NEED_MULTIPLE_NODES
-	help
-	  This is the Linux Xen port.  Enabling this will allow the
-	  kernel to boot in a paravirtualized environment under the
-	  Xen hypervisor.
diff --git a/arch/i386/xen/Makefile b/arch/i386/xen/Makefile
deleted file mode 100644
index 343df246bd3..00000000000
--- a/arch/i386/xen/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-obj-y		:= enlighten.o setup.o features.o multicalls.o mmu.o \
-			events.o time.o manage.o xen-asm.o
-
-obj-$(CONFIG_SMP)	+= smp.o
diff --git a/arch/i386/xen/enlighten.c b/arch/i386/xen/enlighten.c
deleted file mode 100644
index f01bfcd4bde..00000000000
--- a/arch/i386/xen/enlighten.c
+++ /dev/null
@@ -1,1146 +0,0 @@
-/*
- * Core of Xen paravirt_ops implementation.
- *
- * This file contains the xen_paravirt_ops structure itself, and the
- * implementations for:
- * - privileged instructions
- * - interrupt flags
- * - segment operations
- * - booting and setup
- *
- * Jeremy Fitzhardinge <jeremy@xensource.com>, XenSource Inc, 2007
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/preempt.h>
-#include <linux/hardirq.h>
-#include <linux/percpu.h>
-#include <linux/delay.h>
-#include <linux/start_kernel.h>
-#include <linux/sched.h>
-#include <linux/bootmem.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/page-flags.h>
-#include <linux/highmem.h>
-#include <linux/smp.h>
-
-#include <xen/interface/xen.h>
-#include <xen/interface/physdev.h>
-#include <xen/interface/vcpu.h>
-#include <xen/interface/sched.h>
-#include <xen/features.h>
-#include <xen/page.h>
-
-#include <asm/paravirt.h>
-#include <asm/page.h>
-#include <asm/xen/hypercall.h>
-#include <asm/xen/hypervisor.h>
-#include <asm/fixmap.h>
-#include <asm/processor.h>
-#include <asm/setup.h>
-#include <asm/desc.h>
-#include <asm/pgtable.h>
-#include <asm/tlbflush.h>
-#include <asm/reboot.h>
-
-#include "xen-ops.h"
-#include "mmu.h"
-#include "multicalls.h"
-
-EXPORT_SYMBOL_GPL(hypercall_page);
-
-DEFINE_PER_CPU(enum paravirt_lazy_mode, xen_lazy_mode);
-
-DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
-DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info);
-DEFINE_PER_CPU(unsigned long, xen_cr3);
-
-struct start_info *xen_start_info;
-EXPORT_SYMBOL_GPL(xen_start_info);
-
-static /* __initdata */ struct shared_info dummy_shared_info;
-
-/*
- * Point at some empty memory to start with. We map the real shared_info
- * page as soon as fixmap is up and running.
- */
-struct shared_info *HYPERVISOR_shared_info = (void *)&dummy_shared_info;
-
-/*
- * Flag to determine whether vcpu info placement is available on all
- * VCPUs.  We assume it is to start with, and then set it to zero on
- * the first failure.  This is because it can succeed on some VCPUs
- * and not others, since it can involve hypervisor memory allocation,
- * or because the guest failed to guarantee all the appropriate
- * constraints on all VCPUs (ie buffer can't cross a page boundary).
- *
- * Note that any particular CPU may be using a placed vcpu structure,
- * but we can only optimise if the all are.
- *
- * 0: not available, 1: available
- */
-static int have_vcpu_info_placement = 1;
-
-static void __init xen_vcpu_setup(int cpu)
-{
-	struct vcpu_register_vcpu_info info;
-	int err;
-	struct vcpu_info *vcpup;
-
-	per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
-
-	if (!have_vcpu_info_placement)
-		return;		/* already tested, not available */
-
-	vcpup = &per_cpu(xen_vcpu_info, cpu);
-
-	info.mfn = virt_to_mfn(vcpup);
-	info.offset = offset_in_page(vcpup);
-
-	printk(KERN_DEBUG "trying to map vcpu_info %d at %p, mfn %x, offset %d\n",
-	       cpu, vcpup, info.mfn, info.offset);
-
-	/* Check to see if the hypervisor will put the vcpu_info
-	   structure where we want it, which allows direct access via
-	   a percpu-variable. */
-	err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
-
-	if (err) {
-		printk(KERN_DEBUG "register_vcpu_info failed: err=%d\n", err);
-		have_vcpu_info_placement = 0;
-	} else {
-		/* This cpu is using the registered vcpu info, even if
-		   later ones fail to. */
-		per_cpu(xen_vcpu, cpu) = vcpup;
-
-		printk(KERN_DEBUG "cpu %d using vcpu_info at %p\n",
-		       cpu, vcpup);
-	}
-}
-
-static void __init xen_banner(void)
-{
-	printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
-	       paravirt_ops.name);
-	printk(KERN_INFO "Hypervisor signature: %s\n", xen_start_info->magic);
-}
-
-static void xen_cpuid(unsigned int *eax, unsigned int *ebx,
-		      unsigned int *ecx, unsigned int *edx)
-{
-	unsigned maskedx = ~0;
-
-	/*
-	 * Mask out inconvenient features, to try and disable as many
-	 * unsupported kernel subsystems as possible.
-	 */
-	if (*eax == 1)
-		maskedx = ~((1 << X86_FEATURE_APIC) |  /* disable APIC */
-			    (1 << X86_FEATURE_ACPI) |  /* disable ACPI */
-			    (1 << X86_FEATURE_ACC));   /* thermal monitoring */
-
-	asm(XEN_EMULATE_PREFIX "cpuid"
-		: "=a" (*eax),
-		  "=b" (*ebx),
-		  "=c" (*ecx),
-		  "=d" (*edx)
-		: "0" (*eax), "2" (*ecx));
-	*edx &= maskedx;
-}
-
-static void xen_set_debugreg(int reg, unsigned long val)
-{
-	HYPERVISOR_set_debugreg(reg, val);
-}
-
-static unsigned long xen_get_debugreg(int reg)
-{
-	return HYPERVISOR_get_debugreg(reg);
-}
-
-static unsigned long xen_save_fl(void)
-{
-	struct vcpu_info *vcpu;
-	unsigned long flags;
-
-	vcpu = x86_read_percpu(xen_vcpu);
-
-	/* flag has opposite sense of mask */
-	flags = !vcpu->evtchn_upcall_mask;
-
-	/* convert to IF type flag
-	   -0 -> 0x00000000
-	   -1 -> 0xffffffff
-	*/
-	return (-flags) & X86_EFLAGS_IF;
-}
-
-static void xen_restore_fl(unsigned long flags)
-{
-	struct vcpu_info *vcpu;
-
-	/* convert from IF type flag */
-	flags = !(flags & X86_EFLAGS_IF);
-
-	/* There's a one instruction preempt window here.  We need to
-	   make sure we're don't switch CPUs between getting the vcpu
-	   pointer and updating the mask. */
-	preempt_disable();
-	vcpu = x86_read_percpu(xen_vcpu);
-	vcpu->evtchn_upcall_mask = flags;
-	preempt_enable_no_resched();
-
-	/* Doesn't matter if we get preempted here, because any
-	   pending event will get dealt with anyway. */
-
-	if (flags == 0) {
-		preempt_check_resched();
-		barrier(); /* unmask then check (avoid races) */
-		if (unlikely(vcpu->evtchn_upcall_pending))
-			force_evtchn_callback();
-	}
-}
-
-static void xen_irq_disable(void)
-{
-	/* There's a one instruction preempt window here.  We need to
-	   make sure we're don't switch CPUs between getting the vcpu
-	   pointer and updating the mask. */
-	preempt_disable();
-	x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
-	preempt_enable_no_resched();
-}
-
-static void xen_irq_enable(void)
-{
-	struct vcpu_info *vcpu;
-
-	/* There's a one instruction preempt window here.  We need to
-	   make sure we're don't switch CPUs between getting the vcpu
-	   pointer and updating the mask. */
-	preempt_disable();
-	vcpu = x86_read_percpu(xen_vcpu);
-	vcpu->evtchn_upcall_mask = 0;
-	preempt_enable_no_resched();
-
-	/* Doesn't matter if we get preempted here, because any
-	   pending event will get dealt with anyway. */
-
-	barrier(); /* unmask then check (avoid races) */
-	if (unlikely(vcpu->evtchn_upcall_pending))
-		force_evtchn_callback();
-}
-
-static void xen_safe_halt(void)
-{
-	/* Blocking includes an implicit local_irq_enable(). */
-	if (HYPERVISOR_sched_op(SCHEDOP_block, 0) != 0)
-		BUG();
-}
-
-static void xen_halt(void)
-{
-	if (irqs_disabled())
-		HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
-	else
-		xen_safe_halt();
-}
-
-static void xen_set_lazy_mode(enum paravirt_lazy_mode mode)
-{
-	BUG_ON(preemptible());
-
-	switch (mode) {
-	case PARAVIRT_LAZY_NONE:
-		BUG_ON(x86_read_percpu(xen_lazy_mode) == PARAVIRT_LAZY_NONE);
-		break;
-
-	case PARAVIRT_LAZY_MMU:
-	case PARAVIRT_LAZY_CPU:
-		BUG_ON(x86_read_percpu(xen_lazy_mode) != PARAVIRT_LAZY_NONE);
-		break;
-
-	case PARAVIRT_LAZY_FLUSH:
-		/* flush if necessary, but don't change state */
-		if (x86_read_percpu(xen_lazy_mode) != PARAVIRT_LAZY_NONE)
-			xen_mc_flush();
-		return;
-	}
-
-	xen_mc_flush();
-	x86_write_percpu(xen_lazy_mode, mode);
-}
-
-static unsigned long xen_store_tr(void)
-{
-	return 0;
-}
-
-static void xen_set_ldt(const void *addr, unsigned entries)
-{
-	unsigned long linear_addr = (unsigned long)addr;
-	struct mmuext_op *op;
-	struct multicall_space mcs = xen_mc_entry(sizeof(*op));
-
-	op = mcs.args;
-	op->cmd = MMUEXT_SET_LDT;
-	if (linear_addr) {
-		/* ldt my be vmalloced, use arbitrary_virt_to_machine */
-		xmaddr_t maddr;
-		maddr = arbitrary_virt_to_machine((unsigned long)addr);
-		linear_addr = (unsigned long)maddr.maddr;
-	}
-	op->arg1.linear_addr = linear_addr;
-	op->arg2.nr_ents = entries;
-
-	MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
-
-	xen_mc_issue(PARAVIRT_LAZY_CPU);
-}
-
-static void xen_load_gdt(const struct Xgt_desc_struct *dtr)
-{
-	unsigned long *frames;
-	unsigned long va = dtr->address;
-	unsigned int size = dtr->size + 1;
-	unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
-	int f;
-	struct multicall_space mcs;
-
-	/* A GDT can be up to 64k in size, which corresponds to 8192
-	   8-byte entries, or 16 4k pages.. */
-
-	BUG_ON(size > 65536);
-	BUG_ON(va & ~PAGE_MASK);
-
-	mcs = xen_mc_entry(sizeof(*frames) * pages);
-	frames = mcs.args;
-
-	for (f = 0; va < dtr->address + size; va += PAGE_SIZE, f++) {
-		frames[f] = virt_to_mfn(va);
-		make_lowmem_page_readonly((void *)va);
-	}
-
-	MULTI_set_gdt(mcs.mc, frames, size / sizeof(struct desc_struct));
-
-	xen_mc_issue(PARAVIRT_LAZY_CPU);
-}
-
-static void load_TLS_descriptor(struct thread_struct *t,
-				unsigned int cpu, unsigned int i)
-{
-	struct desc_struct *gdt = get_cpu_gdt_table(cpu);
-	xmaddr_t maddr = virt_to_machine(&gdt[GDT_ENTRY_TLS_MIN+i]);
-	struct multicall_space mc = __xen_mc_entry(0);
-
-	MULTI_update_descriptor(mc.mc, maddr.maddr, t->tls_array[i]);
-}
-
-static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
-{
-	xen_mc_batch();
-
-	load_TLS_descriptor(t, cpu, 0);
-	load_TLS_descriptor(t, cpu, 1);
-	load_TLS_descriptor(t, cpu, 2);
-
-	xen_mc_issue(PARAVIRT_LAZY_CPU);
-
-	/*
-	 * XXX sleazy hack: If we're being called in a lazy-cpu zone,
-	 * it means we're in a context switch, and %gs has just been
-	 * saved.  This means we can zero it out to prevent faults on
-	 * exit from the hypervisor if the next process has no %gs.
-	 * Either way, it has been saved, and the new value will get
-	 * loaded properly.  This will go away as soon as Xen has been
-	 * modified to not save/restore %gs for normal hypercalls.
-	 */
-	if (xen_get_lazy_mode() == PARAVIRT_LAZY_CPU)
-		loadsegment(gs, 0);
-}
-
-static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
-{
-	unsigned long lp = (unsigned long)&dt[entrynum];
-	xmaddr_t mach_lp = virt_to_machine(lp);
-	u64 entry = (u64)high << 32 | low;
-
-	preempt_disable();
-
-	xen_mc_flush();
-	if (HYPERVISOR_update_descriptor(mach_lp.maddr, entry))
-		BUG();
-
-	preempt_enable();
-}
-
-static int cvt_gate_to_trap(int vector, u32 low, u32 high,
-			    struct trap_info *info)
-{
-	u8 type, dpl;
-
-	type = (high >> 8) & 0x1f;
-	dpl = (high >> 13) & 3;
-
-	if (type != 0xf && type != 0xe)
-		return 0;
-
-	info->vector = vector;
-	info->address = (high & 0xffff0000) | (low & 0x0000ffff);
-	info->cs = low >> 16;
-	info->flags = dpl;
-	/* interrupt gates clear IF */
-	if (type == 0xe)
-		info->flags |= 4;
-
-	return 1;
-}
-
-/* Locations of each CPU's IDT */
-static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc);
-
-/* Set an IDT entry.  If the entry is part of the current IDT, then
-   also update Xen. */
-static void xen_write_idt_entry(struct desc_struct *dt, int entrynum,
-				u32 low, u32 high)
-{
-	unsigned long p = (unsigned long)&dt[entrynum];
-	unsigned long start, end;
-
-	preempt_disable();
-
-	start = __get_cpu_var(idt_desc).address;
-	end = start + __get_cpu_var(idt_desc).size + 1;
-
-	xen_mc_flush();
-
-	write_dt_entry(dt, entrynum, low, high);
-
-	if (p >= start && (p + 8) <= end) {
-		struct trap_info info[2];
-
-		info[1].address = 0;
-
-		if (cvt_gate_to_trap(entrynum, low, high, &info[0]))
-			if (HYPERVISOR_set_trap_table(info))
-				BUG();
-	}
-
-	preempt_enable();
-}
-
-static void xen_convert_trap_info(const struct Xgt_desc_struct *desc,
-				  struct trap_info *traps)
-{
-	unsigned in, out, count;
-
-	count = (desc->size+1) / 8;
-	BUG_ON(count > 256);
-
-	for (in = out = 0; in < count; in++) {
-		const u32 *entry = (u32 *)(desc->address + in * 8);
-
-		if (cvt_gate_to_trap(in, entry[0], entry[1], &traps[out]))
-			out++;
-	}
-	traps[out].address = 0;
-}
-
-void xen_copy_trap_info(struct trap_info *traps)
-{
-	const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc);
-
-	xen_convert_trap_info(desc, traps);
-}
-
-/* Load a new IDT into Xen.  In principle this can be per-CPU, so we
-   hold a spinlock to protect the static traps[] array (static because
-   it avoids allocation, and saves stack space). */
-static void xen_load_idt(const struct Xgt_desc_struct *desc)
-{
-	static DEFINE_SPINLOCK(lock);
-	static struct trap_info traps[257];
-
-	spin_lock(&lock);
-
-	__get_cpu_var(idt_desc) = *desc;
-
-	xen_convert_trap_info(desc, traps);
-
-	xen_mc_flush();
-	if (HYPERVISOR_set_trap_table(traps))
-		BUG();
-
-	spin_unlock(&lock);
-}
-
-/* Write a GDT descriptor entry.  Ignore LDT descriptors, since
-   they're handled differently. */
-static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
-				u32 low, u32 high)
-{
-	preempt_disable();
-
-	switch ((high >> 8) & 0xff) {
-	case DESCTYPE_LDT:
-	case DESCTYPE_TSS:
-		/* ignore */
-		break;
-
-	default: {
-		xmaddr_t maddr = virt_to_machine(&dt[entry]);
-		u64 desc = (u64)high << 32 | low;
-
-		xen_mc_flush();
-		if (HYPERVISOR_update_descriptor(maddr.maddr, desc))
-			BUG();
-	}
-
-	}
-
-	preempt_enable();
-}
-
-static void xen_load_esp0(struct tss_struct *tss,
-			  struct thread_struct *thread)
-{
-	struct multicall_space mcs = xen_mc_entry(0);
-	MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->esp0);
-	xen_mc_issue(PARAVIRT_LAZY_CPU);
-}
-
-static void xen_set_iopl_mask(unsigned mask)
-{
-	struct physdev_set_iopl set_iopl;
-
-	/* Force the change at ring 0. */
-	set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
-	HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
-}
-
-static void xen_io_delay(void)
-{
-}
-
-#ifdef CONFIG_X86_LOCAL_APIC
-static unsigned long xen_apic_read(unsigned long reg)
-{
-	return 0;
-}
-
-static void xen_apic_write(unsigned long reg, unsigned long val)
-{
-	/* Warn to see if there's any stray references */
-	WARN_ON(1);
-}
-#endif
-
-static void xen_flush_tlb(void)
-{
-	struct mmuext_op *op;
-	struct multicall_space mcs = xen_mc_entry(sizeof(*op));
-
-	op = mcs.args;
-	op->cmd = MMUEXT_TLB_FLUSH_LOCAL;
-	MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
-
-	xen_mc_issue(PARAVIRT_LAZY_MMU);
-}
-
-static void xen_flush_tlb_single(unsigned long addr)
-{
-	struct mmuext_op *op;
-	struct multicall_space mcs = xen_mc_entry(sizeof(*op));
-
-	op = mcs.args;
-	op->cmd = MMUEXT_INVLPG_LOCAL;
-	op->arg1.linear_addr = addr & PAGE_MASK;
-	MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
-
-	xen_mc_issue(PARAVIRT_LAZY_MMU);
-}
-
-static void xen_flush_tlb_others(const cpumask_t *cpus, struct mm_struct *mm,
-				 unsigned long va)
-{
-	struct {
-		struct mmuext_op op;
-		cpumask_t mask;
-	} *args;
-	cpumask_t cpumask = *cpus;
-	struct multicall_space mcs;
-
-	/*
-	 * A couple of (to be removed) sanity checks:
-	 *
-	 * - current CPU must not be in mask
-	 * - mask must exist :)
-	 */
-	BUG_ON(cpus_empty(cpumask));
-	BUG_ON(cpu_isset(smp_processor_id(), cpumask));
-	BUG_ON(!mm);
-
-	/* If a CPU which we ran on has gone down, OK. */
-	cpus_and(cpumask, cpumask, cpu_online_map);
-	if (cpus_empty(cpumask))
-		return;
-
-	mcs = xen_mc_entry(sizeof(*args));
-	args = mcs.args;
-	args->mask = cpumask;
-	args->op.arg2.vcpumask = &args->mask;
-
-	if (va == TLB_FLUSH_ALL) {
-		args->op.cmd = MMUEXT_TLB_FLUSH_MULTI;
-	} else {
-		args->op.cmd = MMUEXT_INVLPG_MULTI;
-		args->op.arg1.linear_addr = va;
-	}
-
-	MULTI_mmuext_op(mcs.mc, &args->op, 1, NULL, DOMID_SELF);
-
-	xen_mc_issue(PARAVIRT_LAZY_MMU);
-}
-
-static void xen_write_cr2(unsigned long cr2)
-{
-	x86_read_percpu(xen_vcpu)->arch.cr2 = cr2;
-}
-
-static unsigned long xen_read_cr2(void)
-{
-	return x86_read_percpu(xen_vcpu)->arch.cr2;
-}
-
-static unsigned long xen_read_cr2_direct(void)
-{
-	return x86_read_percpu(xen_vcpu_info.arch.cr2);
-}
-
-static void xen_write_cr4(unsigned long cr4)
-{
-	/* Just ignore cr4 changes; Xen doesn't allow us to do
-	   anything anyway. */
-}
-
-static unsigned long xen_read_cr3(void)
-{
-	return x86_read_percpu(xen_cr3);
-}
-
-static void xen_write_cr3(unsigned long cr3)
-{
-	BUG_ON(preemptible());
-
-	if (cr3 == x86_read_percpu(xen_cr3)) {
-		/* just a simple tlb flush */
-		xen_flush_tlb();
-		return;
-	}
-
-	x86_write_percpu(xen_cr3, cr3);
-
-
-	{
-		struct mmuext_op *op;
-		struct multicall_space mcs = xen_mc_entry(sizeof(*op));
-		unsigned long mfn = pfn_to_mfn(PFN_DOWN(cr3));
-
-		op = mcs.args;
-		op->cmd = MMUEXT_NEW_BASEPTR;
-		op->arg1.mfn = mfn;
-
-		MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
-
-		xen_mc_issue(PARAVIRT_LAZY_CPU);
-	}
-}
-
-/* Early in boot, while setting up the initial pagetable, assume
-   everything is pinned. */
-static __init void xen_alloc_pt_init(struct mm_struct *mm, u32 pfn)
-{
-	BUG_ON(mem_map);	/* should only be used early */
-	make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
-}
-
-/* This needs to make sure the new pte page is pinned iff its being
-   attached to a pinned pagetable. */
-static void xen_alloc_pt(struct mm_struct *mm, u32 pfn)
-{
-	struct page *page = pfn_to_page(pfn);
-
-	if (PagePinned(virt_to_page(mm->pgd))) {
-		SetPagePinned(page);
-
-		if (!PageHighMem(page))
-			make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
-		else
-			/* make sure there are no stray mappings of
-			   this page */
-			kmap_flush_unused();
-	}
-}
-
-/* This should never happen until we're OK to use struct page */
-static void xen_release_pt(u32 pfn)
-{
-	struct page *page = pfn_to_page(pfn);
-
-	if (PagePinned(page)) {
-		if (!PageHighMem(page))
-			make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
-	}
-}
-
-#ifdef CONFIG_HIGHPTE
-static void *xen_kmap_atomic_pte(struct page *page, enum km_type type)
-{
-	pgprot_t prot = PAGE_KERNEL;
-
-	if (PagePinned(page))
-		prot = PAGE_KERNEL_RO;
-
-	if (0 && PageHighMem(page))
-		printk("mapping highpte %lx type %d prot %s\n",
-		       page_to_pfn(page), type,
-		       (unsigned long)pgprot_val(prot) & _PAGE_RW ? "WRITE" : "READ");
-
-	return kmap_atomic_prot(page, type, prot);
-}
-#endif
-
-static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
-{
-	/* If there's an existing pte, then don't allow _PAGE_RW to be set */
-	if (pte_val_ma(*ptep) & _PAGE_PRESENT)
-		pte = __pte_ma(((pte_val_ma(*ptep) & _PAGE_RW) | ~_PAGE_RW) &
-			       pte_val_ma(pte));
-
-	return pte;
-}
-
-/* Init-time set_pte while constructing initial pagetables, which
-   doesn't allow RO pagetable pages to be remapped RW */
-static __init void xen_set_pte_init(pte_t *ptep, pte_t pte)
-{
-	pte = mask_rw_pte(ptep, pte);
-
-	xen_set_pte(ptep, pte);
-}
-
-static __init void xen_pagetable_setup_start(pgd_t *base)
-{
-	pgd_t *xen_pgd = (pgd_t *)xen_start_info->pt_base;
-
-	/* special set_pte for pagetable initialization */
-	paravirt_ops.set_pte = xen_set_pte_init;
-
-	init_mm.pgd = base;
-	/*
-	 * copy top-level of Xen-supplied pagetable into place.	 For
-	 * !PAE we can use this as-is, but for PAE it is a stand-in
-	 * while we copy the pmd pages.
-	 */
-	memcpy(base, xen_pgd, PTRS_PER_PGD * sizeof(pgd_t));
-
-	if (PTRS_PER_PMD > 1) {
-		int i;
-		/*
-		 * For PAE, need to allocate new pmds, rather than
-		 * share Xen's, since Xen doesn't like pmd's being
-		 * shared between address spaces.
-		 */
-		for (i = 0; i < PTRS_PER_PGD; i++) {
-			if (pgd_val_ma(xen_pgd[i]) & _PAGE_PRESENT) {
-				pmd_t *pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
-
-				memcpy(pmd, (void *)pgd_page_vaddr(xen_pgd[i]),
-				       PAGE_SIZE);
-
-				make_lowmem_page_readonly(pmd);
-
-				set_pgd(&base[i], __pgd(1 + __pa(pmd)));
-			} else
-				pgd_clear(&base[i]);
-		}
-	}
-
-	/* make sure zero_page is mapped RO so we can use it in pagetables */
-	make_lowmem_page_readonly(empty_zero_page);
-	make_lowmem_page_readonly(base);
-	/*
-	 * Switch to new pagetable.  This is done before
-	 * pagetable_init has done anything so that the new pages
-	 * added to the table can be prepared properly for Xen.
-	 */
-	xen_write_cr3(__pa(base));
-}
-
-static __init void xen_pagetable_setup_done(pgd_t *base)
-{
-	/* This will work as long as patching hasn't happened yet
-	   (which it hasn't) */
-	paravirt_ops.alloc_pt = xen_alloc_pt;
-	paravirt_ops.set_pte = xen_set_pte;
-
-	if (!xen_feature(XENFEAT_auto_translated_physmap)) {
-		/*
-		 * Create a mapping for the shared info page.
-		 * Should be set_fixmap(), but shared_info is a machine
-		 * address with no corresponding pseudo-phys address.
-		 */
-		set_pte_mfn(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
-			    PFN_DOWN(xen_start_info->shared_info),
-			    PAGE_KERNEL);
-
-		HYPERVISOR_shared_info =
-			(struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
-
-	} else
-		HYPERVISOR_shared_info =
-			(struct shared_info *)__va(xen_start_info->shared_info);
-
-	/* Actually pin the pagetable down, but we can't set PG_pinned
-	   yet because the page structures don't exist yet. */
-	{
-		struct mmuext_op op;
-#ifdef CONFIG_X86_PAE
-		op.cmd = MMUEXT_PIN_L3_TABLE;
-#else
-		op.cmd = MMUEXT_PIN_L3_TABLE;
-#endif
-		op.arg1.mfn = pfn_to_mfn(PFN_DOWN(__pa(base)));
-		if (HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF))
-			BUG();
-	}
-}
-
-/* This is called once we have the cpu_possible_map */
-void __init xen_setup_vcpu_info_placement(void)
-{
-	int cpu;
-
-	for_each_possible_cpu(cpu)
-		xen_vcpu_setup(cpu);
-
-	/* xen_vcpu_setup managed to place the vcpu_info within the
-	   percpu area for all cpus, so make use of it */
-	if (have_vcpu_info_placement) {
-		printk(KERN_INFO "Xen: using vcpu_info placement\n");
-
-		paravirt_ops.save_fl = xen_save_fl_direct;
-		paravirt_ops.restore_fl = xen_restore_fl_direct;
-		paravirt_ops.irq_disable = xen_irq_disable_direct;
-		paravirt_ops.irq_enable = xen_irq_enable_direct;
-		paravirt_ops.read_cr2 = xen_read_cr2_direct;
-		paravirt_ops.iret = xen_iret_direct;
-	}
-}
-
-static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf,
-			  unsigned long addr, unsigned len)
-{
-	char *start, *end, *reloc;
-	unsigned ret;
-
-	start = end = reloc = NULL;
-
-#define SITE(x)								\
-	case PARAVIRT_PATCH(x):						\
-	if (have_vcpu_info_placement) {					\
-		start = (char *)xen_##x##_direct;			\
-		end = xen_##x##_direct_end;				\
-		reloc = xen_##x##_direct_reloc;				\
-	}								\
-	goto patch_site
-
-	switch (type) {
-		SITE(irq_enable);
-		SITE(irq_disable);
-		SITE(save_fl);
-		SITE(restore_fl);
-#undef SITE
-
-	patch_site:
-		if (start == NULL || (end-start) > len)
-			goto default_patch;
-
-		ret = paravirt_patch_insns(insnbuf, len, start, end);
-
-		/* Note: because reloc is assigned from something that
-		   appears to be an array, gcc assumes it's non-null,
-		   but doesn't know its relationship with start and
-		   end. */
-		if (reloc > start && reloc < end) {
-			int reloc_off = reloc - start;
-			long *relocp = (long *)(insnbuf + reloc_off);
-			long delta = start - (char *)addr;
-
-			*relocp += delta;
-		}
-		break;
-
-	default_patch:
-	default:
-		ret = paravirt_patch_default(type, clobbers, insnbuf,
-					     addr, len);
-		break;
-	}
-
-	return ret;
-}
-
-static const struct paravirt_ops xen_paravirt_ops __initdata = {
-	.paravirt_enabled = 1,
-	.shared_kernel_pmd = 0,
-
-	.name = "Xen",
-	.banner = xen_banner,
-
-	.patch = xen_patch,
-
-	.memory_setup = xen_memory_setup,
-	.arch_setup = xen_arch_setup,
-	.init_IRQ = xen_init_IRQ,
-	.post_allocator_init = xen_mark_init_mm_pinned,
-
-	.time_init = xen_time_init,
-	.set_wallclock = xen_set_wallclock,
-	.get_wallclock = xen_get_wallclock,
-	.get_cpu_khz = xen_cpu_khz,
-	.sched_clock = xen_sched_clock,
-
-	.cpuid = xen_cpuid,
-
-	.set_debugreg = xen_set_debugreg,
-	.get_debugreg = xen_get_debugreg,
-
-	.clts = native_clts,
-
-	.read_cr0 = native_read_cr0,
-	.write_cr0 = native_write_cr0,
-
-	.read_cr2 = xen_read_cr2,
-	.write_cr2 = xen_write_cr2,
-
-	.read_cr3 = xen_read_cr3,
-	.write_cr3 = xen_write_cr3,
-
-	.read_cr4 = native_read_cr4,
-	.read_cr4_safe = native_read_cr4_safe,
-	.write_cr4 = xen_write_cr4,
-
-	.save_fl = xen_save_fl,
-	.restore_fl = xen_restore_fl,
-	.irq_disable = xen_irq_disable,
-	.irq_enable = xen_irq_enable,
-	.safe_halt = xen_safe_halt,
-	.halt = xen_halt,
-	.wbinvd = native_wbinvd,