diff --git a/arch/loongarch/kvm/mmu.c b/arch/loongarch/kvm/mmu.c
new file mode 100644
index 000000000000..d75446139546
--- /dev/null
+++ b/arch/loongarch/kvm/mmu.c
@@ -0,0 +1,725 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/highmem.h>
+#include <linux/page-flags.h>
+#include <linux/kvm_host.h>
+#include <linux/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/pgalloc.h>
+#include <asm/tlb.h>
+
+/*
+ * KVM_MMU_CACHE_MIN_PAGES is the number of GPA page table translation levels
+ * for which pages need to be cached.
+ */
+#define KVM_MMU_CACHE_MIN_PAGES (CONFIG_PGTABLE_LEVELS - 1)
+
+/**
+ * kvm_pgd_alloc() - Allocate and initialise a KVM GPA page directory.
+ *
+ * Allocate a blank KVM GPA page directory (PGD) for representing guest physical
+ * to host physical page mappings.
+ *
+ * Returns:	Pointer to new KVM GPA page directory.
+ *		NULL on allocation failure.
+ */
+pgd_t *kvm_pgd_alloc(void)
+{
+	pgd_t *pgd;
+
+	pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, 0);
+	if (pgd)
+		pgd_init((void *)pgd);
+
+	return pgd;
+}
+
+/**
+ * kvm_walk_pgd() - Walk page table with optional allocation.
+ * @pgd:	Page directory pointer.
+ * @addr:	Address to index page table using.
+ * @cache:	MMU page cache to allocate new page tables from, or NULL.
+ *
+ * Walk the page tables pointed to by @pgd to find the PTE corresponding to the
+ * address @addr. If page tables don't exist for @addr, they will be created
+ * from the MMU cache if @cache is not NULL.
+ *
+ * Returns:	Pointer to pte_t corresponding to @addr.
+ *		NULL if a page table doesn't exist for @addr and !@cache.
+ *		NULL if a page table allocation failed.
+ */
+static pte_t *kvm_walk_pgd(pgd_t *pgd, struct kvm_mmu_memory_cache *cache,
+				unsigned long addr)
+{
+	p4d_t *p4d;
+	pud_t *pud;
+	pmd_t *pmd;
+
+	pgd += pgd_index(addr);
+	if (pgd_none(*pgd)) {
+		/* Not used yet */
+		BUG();
+		return NULL;
+	}
+	p4d = p4d_offset(pgd, addr);
+	pud = pud_offset(p4d, addr);
+	if (pud_none(*pud)) {
+		pmd_t *new_pmd;
+
+		if (!cache)
+			return NULL;
+		new_pmd = kvm_mmu_memory_cache_alloc(cache);
+		pmd_init((void *)new_pmd);
+		pud_populate(NULL, pud, new_pmd);
+	}
+	pmd = pmd_offset(pud, addr);
+	if (pmd_none(*pmd)) {
+		pte_t *new_pte;
+
+		if (!cache)
+			return NULL;
+		new_pte = kvm_mmu_memory_cache_alloc(cache);
+		clear_page(new_pte);
+		pmd_populate_kernel(NULL, pmd, new_pte);
+	}
+	return pte_offset_kernel(pmd, addr);
+}
+
+/* Caller must hold kvm->mm_lock */
+static pte_t *kvm_pte_for_gpa(struct kvm *kvm,
+				struct kvm_mmu_memory_cache *cache,
+				unsigned long addr)
+{
+	return kvm_walk_pgd(kvm->arch.gpa_mm.pgd, cache, addr);
+}
+
+/*
+ * level2_flush_{pte,pmd,pud,pgd,pt}.
+ * Flush a range of guest physical address space from the VM's GPA page tables.
+ */
+static int level2_flush_pte(pmd_t *pmd, unsigned long addr, unsigned long end)
+{
+	pte_t *pte;
+	unsigned long next, start;
+	int ret;
+
+	ret = 0;
+	start = addr;
+	pte = pte_offset_kernel(pmd, addr);
+	do {
+		next = addr + PAGE_SIZE;
+		if (!pte_present(*pte))
+			continue;
+
+		set_pte(pte, __pte(0));
+		ret = 1;
+	} while (pte++, addr = next, addr != end);
+
+	if (start + PMD_SIZE == end) {
+		pte = pte_offset_kernel(pmd, 0);
+		pmd_clear(pmd);
+		pte_free_kernel(NULL, pte);
+	}
+	return ret;
+}
+
+static int level2_flush_pmd(pud_t *pud, unsigned long addr, unsigned long end)
+{
+	pmd_t *pmd;
+	unsigned long next, start;
+	int ret;
+
+	ret = 0;
+	start = addr;
+	pmd = pmd_offset(pud, addr);
+	do {
+		next = pmd_addr_end(addr, end);
+		if (!pmd_present(*pmd))
+			continue;
+
+		ret |= level2_flush_pte(pmd, addr, next);
+	} while (pmd++, addr = next, addr != end);
+
+	if (start + PUD_SIZE == end) {
+		pmd = pmd_offset(pud, 0);
+		pud_clear(pud);
+		pmd_free(NULL, pmd);
+	}
+	return ret;
+}
+
+static int level2_flush_pud(pgd_t *pgd, unsigned long addr, unsigned long end)
+{
+	p4d_t *p4d;
+	pud_t *pud;
+	unsigned long next, start;
+	int ret;
+
+	ret = 0;
+	start = addr;
+	p4d = p4d_offset(pgd, addr);
+	pud = pud_offset(p4d, addr);
+	do {
+		next = pud_addr_end(addr, end);
+		if (!pud_present(*pud))
+			continue;
+
+		ret |= level2_flush_pmd(pud, addr, next);
+	} while (pud++, addr = next, addr != end);
+
+	if (start + PGDIR_SIZE == end) {
+		pud = pud_offset(p4d, 0);
+		pgd_clear(pgd);
+		pud_free(NULL, pud);
+	}
+	return ret;
+}
+
+static int level2_flush_pgd(pgd_t *pgd, unsigned long addr, unsigned long end)
+{
+	unsigned long next;
+	int ret;
+
+	ret = 0;
+	if (addr > end - 1)
+		return ret;
+	pgd = pgd + pgd_index(addr);
+	do {
+		next = pgd_addr_end(addr, end);
+		if (!pgd_present(*pgd))
+			continue;
+
+		ret |= level2_flush_pud(pgd, addr, next);
+	}  while (pgd++, addr = next, addr != end);
+
+	return ret;
+}
+
+/**
+ * level2_flush_range() - Flush a range of guest physical addresses.
+ * @kvm:	KVM pointer.
+ * @start_gfn:	Guest frame number of first page in GPA range to flush.
+ * @end_gfn:	Guest frame number of last page in GPA range to flush.
+ *
+ * Flushes a range of GPA mappings from the GPA page tables.
+ *
+ * The caller must hold the @kvm->mmu_lock spinlock.
+ *
+ * Returns:	Whether its safe to remove the top level page directory because
+ *		all lower levels have been removed.
+ */
+static bool level2_flush_range(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn)
+{
+	return level2_flush_pgd(kvm->arch.gpa_mm.pgd, start_gfn << PAGE_SHIFT,
+				end_gfn << PAGE_SHIFT);
+}
+
+typedef int (*level2_pte_ops)(void *pte);
+/*
+ * level2_mkclean_pte
+ * Mark a range of guest physical address space clean (writes fault) in the VM's
+ * GPA page table to allow dirty page tracking.
+ */
+static int level2_mkclean_pte(void *pte)
+{
+	pte_t val;
+
+	val = *(pte_t *)pte;
+	if (pte_dirty(val)) {
+		*(pte_t *)pte = pte_mkclean(val);
+		return 1;
+	}
+	return 0;
+}
+
+static int level2_ptw_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
+			level2_pte_ops func)
+{
+	pte_t *pte;
+	unsigned long next;
+	int ret;
+
+	ret = 0;
+	pte = pte_offset_kernel(pmd, addr);
+	do {
+		next = addr + PAGE_SIZE;
+		if (!pte_present(*pte))
+			continue;
+
+		ret |= func(pte);
+	} while (pte++, addr = next, addr != end);
+
+	return ret;
+}
+
+static int level2_ptw_pmd(pud_t *pud, unsigned long addr, unsigned long end,
+			level2_pte_ops func)
+{
+	pmd_t *pmd;
+	unsigned long next;
+	int ret;
+
+	ret = 0;
+	pmd = pmd_offset(pud, addr);
+	do {
+		next = pmd_addr_end(addr, end);
+		if (!pmd_present(*pmd))
+			continue;
+
+		ret |= level2_ptw_pte(pmd, addr, next, func);
+	} while (pmd++, addr = next, addr != end);
+
+	return ret;
+}
+
+static int level2_ptw_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
+			level2_pte_ops func)
+{
+	p4d_t *p4d;
+	pud_t *pud;
+	unsigned long next;
+	int ret;
+
+	ret = 0;
+	p4d = p4d_offset(pgd, addr);
+	pud = pud_offset(p4d, addr);
+	do {
+		next = pud_addr_end(addr, end);
+		if (!pud_present(*pud))
+			continue;
+
+		ret |= level2_ptw_pmd(pud, addr, next, func);
+	} while (pud++, addr = next, addr != end);
+
+	return ret;
+}
+
+static int level2_ptw_pgd(pgd_t *pgd, unsigned long addr, unsigned long end,
+			level2_pte_ops func)
+{
+	unsigned long next;
+	int ret;
+
+	ret = 0;
+	if (addr > end - 1)
+		return ret;
+	pgd = pgd + pgd_index(addr);
+	do {
+		next = pgd_addr_end(addr, end);
+		if (!pgd_present(*pgd))
+			continue;
+
+		ret |= level2_ptw_pud(pgd, addr, next, func);
+	}  while (pgd++, addr = next, addr != end);
+
+	return ret;
+}
+
+/*
+ * kvm_mkclean_gpa_pt() - Make a range of guest physical addresses clean.
+ * @kvm:	KVM pointer.
+ * @start_gfn:	Guest frame number of first page in GPA range to flush.
+ * @end_gfn:	Guest frame number of last page in GPA range to flush.
+ *
+ * Make a range of GPA mappings clean so that guest writes will fault and
+ * trigger dirty page logging.
+ *
+ * The caller must hold the @kvm->mmu_lock spinlock.
+ *
+ * Returns:	Whether any GPA mappings were modified, which would require
+ *		derived mappings (GVA page tables & TLB enties) to be
+ *		invalidated.
+ */
+static int kvm_mkclean_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn)
+{
+	return level2_ptw_pgd(kvm->arch.gpa_mm.pgd, start_gfn << PAGE_SHIFT,
+				end_gfn << PAGE_SHIFT, level2_mkclean_pte);
+}
+
+/*
+ * kvm_arch_mmu_enable_log_dirty_pt_masked() - write protect dirty pages
+ * @kvm:	The KVM pointer
+ * @slot:	The memory slot associated with mask
+ * @gfn_offset:	The gfn offset in memory slot
+ * @mask:	The mask of dirty pages at offset 'gfn_offset' in this memory
+ *		slot to be write protected
+ *
+ * Walks bits set in mask write protects the associated pte's. Caller must
+ * acquire @kvm->mmu_lock.
+ */
+void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm,
+		struct kvm_memory_slot *slot,
+		gfn_t gfn_offset, unsigned long mask)
+{
+	gfn_t base_gfn = slot->base_gfn + gfn_offset;
+	gfn_t start = base_gfn +  __ffs(mask);
+	gfn_t end = base_gfn + __fls(mask) + 1;
+
+	kvm_mkclean_gpa_pt(kvm, start, end);
+}
+
+void kvm_arch_commit_memory_region(struct kvm *kvm,
+				   struct kvm_memory_slot *old,
+				   const struct kvm_memory_slot *new,
+				   enum kvm_mr_change change)
+{
+	int needs_flush;
+
+	/*
+	 * If dirty page logging is enabled, write protect all pages in the slot
+	 * ready for dirty logging.
+	 *
+	 * There is no need to do this in any of the following cases:
+	 * CREATE:	No dirty mappings will already exist.
+	 * MOVE/DELETE:	The old mappings will already have been cleaned up by
+	 *		kvm_arch_flush_shadow_memslot()
+	 */
+	if (change == KVM_MR_FLAGS_ONLY &&
+	    (!(old->flags & KVM_MEM_LOG_DIRTY_PAGES) &&
+	     new->flags & KVM_MEM_LOG_DIRTY_PAGES)) {
+		spin_lock(&kvm->mmu_lock);
+		/* Write protect GPA page table entries */
+		needs_flush = kvm_mkclean_gpa_pt(kvm, new->base_gfn,
+					new->base_gfn + new->npages);
+		if (needs_flush)
+			kvm_flush_remote_tlbs(kvm);
+		spin_unlock(&kvm->mmu_lock);
+	}
+}
+
+void kvm_arch_flush_shadow_all(struct kvm *kvm)
+{
+	/* Flush whole GPA */
+	level2_flush_range(kvm, 0, kvm->arch.gpa_size >> PAGE_SHIFT);
+	/* Flush vpid for each vCPU individually */
+	kvm_flush_remote_tlbs(kvm);
+}
+
+void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
+		struct kvm_memory_slot *slot)
+{
+	int ret;
+
+	/*
+	 * The slot has been made invalid (ready for moving or deletion), so we
+	 * need to ensure that it can no longer be accessed by any guest vCPUs.
+	 */
+	spin_lock(&kvm->mmu_lock);
+	/* Flush slot from GPA */
+	ret = level2_flush_range(kvm, slot->base_gfn,
+			slot->base_gfn + slot->npages);
+	/* Let implementation do the rest */
+	if (ret)
+		kvm_flush_remote_tlbs(kvm);
+	spin_unlock(&kvm->mmu_lock);
+}
+
+void _kvm_destroy_mm(struct kvm *kvm)
+{
+	/* It should always be safe to remove after flushing the whole range */
+	level2_flush_range(kvm, 0, kvm->arch.gpa_size >> PAGE_SHIFT);
+	pgd_free(NULL, kvm->arch.gpa_mm.pgd);
+	kvm->arch.gpa_mm.pgd = NULL;
+}
+
+/*
+ * Mark a range of guest physical address space old (all accesses fault) in the
+ * VM's GPA page table to allow detection of commonly used pages.
+ */
+static int level2_mkold_pte(void *pte)
+{
+	pte_t val;
+
+	val = *(pte_t *)pte;
+	if (pte_young(val)) {
+		*(pte_t *)pte = pte_mkold(val);
+		return 1;
+	}
+	return 0;
+}
+
+bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
+{
+	return level2_flush_range(kvm, range->start, range->end);
+}
+
+bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
+{
+	gpa_t gpa = range->start << PAGE_SHIFT;
+	pte_t hva_pte = range->pte;
+	pte_t *ptep = kvm_pte_for_gpa(kvm, NULL, gpa);
+	pte_t old_pte;
+
+	if (!ptep)
+		return false;
+
+	/* Mapping may need adjusting depending on memslot flags */
+	old_pte = *ptep;
+	if (range->slot->flags & KVM_MEM_LOG_DIRTY_PAGES && !pte_dirty(old_pte))
+		hva_pte = pte_mkclean(hva_pte);
+	else if (range->slot->flags & KVM_MEM_READONLY)
+		hva_pte = pte_wrprotect(hva_pte);
+
+	set_pte(ptep, hva_pte);
+
+	/* Replacing an absent or old page doesn't need flushes */
+	if (!pte_present(old_pte) || !pte_young(old_pte))
+		return false;
+
+	/* Pages swapped, aged, moved, or cleaned require flushes */
+	return !pte_present(hva_pte) ||
+	       !pte_young(hva_pte) ||
+	       pte_pfn(old_pte) != pte_pfn(hva_pte) ||
+	       (pte_dirty(old_pte) && !pte_dirty(hva_pte));
+}
+
+bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
+{
+	return level2_ptw_pgd(kvm->arch.gpa_mm.pgd, range->start << PAGE_SHIFT,
+				range->end << PAGE_SHIFT, level2_mkold_pte);
+}
+
+bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
+{
+	gpa_t gpa = range->start << PAGE_SHIFT;
+	pte_t *ptep = kvm_pte_for_gpa(kvm, NULL, gpa);
+
+	if (ptep && pte_present(*ptep) && pte_young(*ptep))
+		return true;
+
+	return false;
+}
+
+/**
+ * kvm_map_page_fast() - Fast path GPA fault handler.
+ * @vcpu:		vCPU pointer.
+ * @gpa:		Guest physical address of fault.
+ * @write:	Whether the fault was due to a write.
+ *
+ * Perform fast path GPA fault handling, doing all that can be done without
+ * calling into KVM. This handles marking old pages young (for idle page
+ * tracking), and dirtying of clean pages (for dirty page logging).
+ *
+ * Returns:	0 on success, in which case we can update derived mappings and
+ *		resume guest execution.
+ *		-EFAULT on failure due to absent GPA mapping or write to
+ *		read-only page, in which case KVM must be consulted.
+ */
+static int kvm_map_page_fast(struct kvm_vcpu *vcpu, unsigned long gpa,
+				   bool write)
+{
+	struct kvm *kvm = vcpu->kvm;
+	gfn_t gfn = gpa >> PAGE_SHIFT;
+	pte_t *ptep;
+	kvm_pfn_t pfn = 0;
+	bool pfn_valid = false;
+	int ret = 0;
+
+	spin_lock(&kvm->mmu_lock);
+
+	/* Fast path - just check GPA page table for an existing entry */
+	ptep = kvm_pte_for_gpa(kvm, NULL, gpa);
+	if (!ptep || !pte_present(*ptep)) {
+		ret = -EFAULT;
+		goto out;
+	}
+
+	/* Track access to pages marked old */
+	if (!pte_young(*ptep)) {
+		set_pte(ptep, pte_mkyoung(*ptep));
+		pfn = pte_pfn(*ptep);
+		pfn_valid = true;
+		/* call kvm_set_pfn_accessed() after unlock */
+	}
+	if (write && !pte_dirty(*ptep)) {
+		if (!pte_write(*ptep)) {
+			ret = -EFAULT;
+			goto out;
+		}
+
+		/* Track dirtying of writeable pages */
+		set_pte(ptep, pte_mkdirty(*ptep));
+		pfn = pte_pfn(*ptep);
+		mark_page_dirty(kvm, gfn);
+		kvm_set_pfn_dirty(pfn);
+	}
+
+out:
+	spin_unlock(&kvm->mmu_lock);
+	if (pfn_valid)
+		kvm_set_pfn_accessed(pfn);
+	return ret;
+}
+
+/**
+ * kvm_map_page() - Map a guest physical page.
+ * @vcpu:		vCPU pointer.
+ * @gpa:		Guest physical address of fault.
+ * @write:	Whether the fault was due to a write.
+ *
+ * Handle GPA faults by creating a new GPA mapping (or updating an existing
+ * one).
+ *
+ * This takes care of marking pages young or dirty (idle/dirty page tracking),
+ * asking KVM for the corresponding PFN, and creating a mapping in the GPA page
+ * tables. Derived mappings (GVA page tables and TLBs) must be handled by the
+ * caller.
+ *
+ * Returns:	0 on success
+ *		-EFAULT if there is no memory region at @gpa or a write was
+ *		attempted to a read-only memory region. This is usually handled
+ *		as an MMIO access.
+ */
+static int kvm_map_page(struct kvm_vcpu *vcpu, unsigned long gpa, bool write)
+{
+	bool writeable;
+	int srcu_idx, err = 0, retry_no = 0;
+	unsigned long hva;
+	unsigned long mmu_seq;
+	unsigned long prot_bits;
+	pte_t *ptep, new_pte;
+	kvm_pfn_t pfn;
+	gfn_t gfn = gpa >> PAGE_SHIFT;
+	struct vm_area_struct *vma;
+	struct kvm *kvm = vcpu->kvm;
+	struct kvm_memory_slot *memslot;
+	struct kvm_mmu_memory_cache *memcache = &vcpu->arch.mmu_page_cache;
+
+	/* Try the fast path to handle old / clean pages */
+	srcu_idx = srcu_read_lock(&kvm->srcu);
+	err = kvm_map_page_fast(vcpu, gpa, write);
+	if (!err)
+		goto out;
+
+	memslot = gfn_to_memslot(kvm, gfn);
+	hva = gfn_to_hva_memslot_prot(memslot, gfn, &writeable);
+	if (kvm_is_error_hva(hva) || (write && !writeable))
+		goto out;
+
+	mmap_read_lock(current->mm);
+	vma = find_vma_intersection(current->mm, hva, hva + 1);
+	if (unlikely(!vma)) {
+		kvm_err("Failed to find VMA for hva 0x%lx\n", hva);
+		mmap_read_unlock(current->mm);
+		err = -EFAULT;
+		goto out;
+	}
+	mmap_read_unlock(current->mm);
+
+	/* We need a minimum of cached pages ready for page table creation */
+	err = kvm_mmu_topup_memory_cache(memcache, KVM_MMU_CACHE_MIN_PAGES);
+	if (err)
+		goto out;
+
+retry:
+	/*
+	 * Used to check for invalidations in progress, of the pfn that is
+	 * returned by pfn_to_pfn_prot below.
+	 */
+	mmu_seq = kvm->mmu_invalidate_seq;
+	/*
+	 * Ensure the read of mmu_invalidate_seq isn't reordered with PTE reads in
+	 * gfn_to_pfn_prot() (which calls get_user_pages()), so that we don't
+	 * risk the page we get a reference to getting unmapped before we have a
+	 * chance to grab the mmu_lock without mmu_invalidate_retry() noticing.
+	 *
+	 * This smp_rmb() pairs with the effective smp_wmb() of the combination
+	 * of the pte_unmap_unlock() after the PTE is zapped, and the
+	 * spin_lock() in kvm_mmu_invalidate_invalidate_<page|range_end>() before
+	 * mmu_invalidate_seq is incremented.
+	 */
+	smp_rmb();
+
+	/* Slow path - ask KVM core whether we can access this GPA */
+	pfn = gfn_to_pfn_prot(kvm, gfn, write, &writeable);
+	if (is_error_noslot_pfn(pfn)) {
+		err = -EFAULT;
+		goto out;
+	}
+
+	spin_lock(&kvm->mmu_lock);
+	/* Check if an invalidation has taken place since we got pfn */
+	if (mmu_invalidate_retry(kvm, mmu_seq)) {
+		/*
+		 * This can happen when mappings are changed asynchronously, but
+		 * also synchronously if a COW is triggered by
+		 * gfn_to_pfn_prot().
+		 */
+		spin_unlock(&kvm->mmu_lock);
+		kvm_set_pfn_accessed(pfn);
+		kvm_release_pfn_clean(pfn);
+		if (retry_no > 100) {
+			retry_no = 0;
+			schedule();
+		}
+		retry_no++;
+		goto retry;
+	}
+
+	/*
+	 * For emulated devices such virtio device, actual cache attribute is
+	 * determined by physical machine.
+	 * For pass through physical device, it should be uncachable
+	 */
+	prot_bits = _PAGE_PRESENT | __READABLE;
+	if (vma->vm_flags & (VM_IO | VM_PFNMAP))
+		prot_bits |= _CACHE_SUC;
+	else
+		prot_bits |= _CACHE_CC;
+
+	if (writeable) {
+		prot_bits |= _PAGE_WRITE;
+		if (write) {
+			prot_bits |= __WRITEABLE;
+			mark_page_dirty(kvm, gfn);
+			kvm_set_pfn_dirty(pfn);
+		}
+	}
+
+	/* Ensure page tables are allocated */
+	ptep = kvm_pte_for_gpa(kvm, memcache, gpa);
+	new_pte = pfn_pte(pfn, __pgprot(prot_bits));
+	set_pte(ptep, new_pte);
+
+	err = 0;
+	spin_unlock(&kvm->mmu_lock);
+	kvm_release_pfn_clean(pfn);
+	kvm_set_pfn_accessed(pfn);
+out:
+	srcu_read_unlock(&kvm->srcu, srcu_idx);
+	return err;
+}
+
+int kvm_handle_mm_fault(struct kvm_vcpu *vcpu, unsigned long gpa, bool write)
+{
+	int ret;
+
+	ret = kvm_map_page(vcpu, gpa, write);
+	if (ret)
+		return ret;
+
+	/* Invalidate this entry in the TLB */
+	return kvm_flush_tlb_gpa(vcpu, gpa);
+}
+
+void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
+{
+
+}
+
+int kvm_arch_prepare_memory_region(struct kvm *kvm,
+				   const struct kvm_memory_slot *old,
+				   struct kvm_memory_slot *new,
+				   enum kvm_mr_change change)
+{
+	return 0;
+}
+
+void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
+					const struct kvm_memory_slot *memslot)
+{
+	kvm_flush_remote_tlbs(kvm);
+}
