Commit 4db35314 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: MMU: Rename variables of type 'struct kvm_mmu_page *' 



These are traditionally named 'page', but even more traditionally, that name
is reserved for variables that point to a 'struct page'.  Rename them to 'sp'
(for "shadow page").

Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent 1d28f5f4

drivers/kvm/mmu.c

+146 −154
Original line number Diff line number Diff line
@@ -367,7 +367,7 @@ static unsigned long *gfn_to_rmap(struct kvm *kvm, gfn_t gfn) 
 */

static void rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)

{

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct kvm_rmap_desc *desc;

	unsigned long *rmapp;

	int i;
@@ -375,8 +375,8 @@ static void rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn) 
	if (!is_rmap_pte(*spte))

		return;

	gfn = unalias_gfn(vcpu->kvm, gfn);

	page = page_header(__pa(spte));

	page->gfns[spte - page->spt] = gfn;

	sp = page_header(__pa(spte));

	sp->gfns[spte - sp->spt] = gfn;

	rmapp = gfn_to_rmap(vcpu->kvm, gfn);

	if (!*rmapp) {

		rmap_printk("rmap_add: %p %llx 0->1\n", spte, *spte);
@@ -429,20 +429,20 @@ static void rmap_remove(struct kvm *kvm, u64 *spte) 
{

	struct kvm_rmap_desc *desc;

	struct kvm_rmap_desc *prev_desc;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct page *release_page;

	unsigned long *rmapp;

	int i;



	if (!is_rmap_pte(*spte))

		return;

	page = page_header(__pa(spte));

	sp = page_header(__pa(spte));

	release_page = pfn_to_page((*spte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT);

	if (is_writeble_pte(*spte))

		kvm_release_page_dirty(release_page);

	else

		kvm_release_page_clean(release_page);

	rmapp = gfn_to_rmap(kvm, page->gfns[spte - page->spt]);

	rmapp = gfn_to_rmap(kvm, sp->gfns[spte - sp->spt]);

	if (!*rmapp) {

		printk(KERN_ERR "rmap_remove: %p %llx 0->BUG\n", spte, *spte);

		BUG();
@@ -537,14 +537,13 @@ static int is_empty_shadow_page(u64 *spt) 
}

#endif



static void kvm_mmu_free_page(struct kvm *kvm,

			      struct kvm_mmu_page *page_head)

static void kvm_mmu_free_page(struct kvm *kvm, struct kvm_mmu_page *sp)

{

	ASSERT(is_empty_shadow_page(page_head->spt));

	list_del(&page_head->link);

	__free_page(virt_to_page(page_head->spt));

	__free_page(virt_to_page(page_head->gfns));

	kfree(page_head);

	ASSERT(is_empty_shadow_page(sp->spt));

	list_del(&sp->link);

	__free_page(virt_to_page(sp->spt));

	__free_page(virt_to_page(sp->gfns));

	kfree(sp);

	++kvm->n_free_mmu_pages;

}
@@ -556,27 +555,26 @@ static unsigned kvm_page_table_hashfn(gfn_t gfn) 
static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,

					       u64 *parent_pte)

{

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;



	if (!vcpu->kvm->n_free_mmu_pages)

		return NULL;



	page = mmu_memory_cache_alloc(&vcpu->mmu_page_header_cache,

				      sizeof *page);

	page->spt = mmu_memory_cache_alloc(&vcpu->mmu_page_cache, PAGE_SIZE);

	page->gfns = mmu_memory_cache_alloc(&vcpu->mmu_page_cache, PAGE_SIZE);

	set_page_private(virt_to_page(page->spt), (unsigned long)page);

	list_add(&page->link, &vcpu->kvm->active_mmu_pages);

	ASSERT(is_empty_shadow_page(page->spt));

	page->slot_bitmap = 0;

	page->multimapped = 0;

	page->parent_pte = parent_pte;

	sp = mmu_memory_cache_alloc(&vcpu->mmu_page_header_cache, sizeof *sp);

	sp->spt = mmu_memory_cache_alloc(&vcpu->mmu_page_cache, PAGE_SIZE);

	sp->gfns = mmu_memory_cache_alloc(&vcpu->mmu_page_cache, PAGE_SIZE);

	set_page_private(virt_to_page(sp->spt), (unsigned long)sp);

	list_add(&sp->link, &vcpu->kvm->active_mmu_pages);

	ASSERT(is_empty_shadow_page(sp->spt));

	sp->slot_bitmap = 0;

	sp->multimapped = 0;

	sp->parent_pte = parent_pte;

	--vcpu->kvm->n_free_mmu_pages;

	return page;

	return sp;

}



static void mmu_page_add_parent_pte(struct kvm_vcpu *vcpu,

				    struct kvm_mmu_page *page, u64 *parent_pte)

				    struct kvm_mmu_page *sp, u64 *parent_pte)

{

	struct kvm_pte_chain *pte_chain;

	struct hlist_node *node;
@@ -584,20 +582,20 @@ static void mmu_page_add_parent_pte(struct kvm_vcpu *vcpu, 


	if (!parent_pte)

		return;

	if (!page->multimapped) {

		u64 *old = page->parent_pte;

	if (!sp->multimapped) {

		u64 *old = sp->parent_pte;



		if (!old) {

			page->parent_pte = parent_pte;

			sp->parent_pte = parent_pte;

			return;

		}

		page->multimapped = 1;

		sp->multimapped = 1;

		pte_chain = mmu_alloc_pte_chain(vcpu);

		INIT_HLIST_HEAD(&page->parent_ptes);

		hlist_add_head(&pte_chain->link, &page->parent_ptes);

		INIT_HLIST_HEAD(&sp->parent_ptes);

		hlist_add_head(&pte_chain->link, &sp->parent_ptes);

		pte_chain->parent_ptes[0] = old;

	}

	hlist_for_each_entry(pte_chain, node, &page->parent_ptes, link) {

	hlist_for_each_entry(pte_chain, node, &sp->parent_ptes, link) {

		if (pte_chain->parent_ptes[NR_PTE_CHAIN_ENTRIES-1])

			continue;

		for (i = 0; i < NR_PTE_CHAIN_ENTRIES; ++i)
@@ -608,23 +606,23 @@ static void mmu_page_add_parent_pte(struct kvm_vcpu *vcpu, 
	}

	pte_chain = mmu_alloc_pte_chain(vcpu);

	BUG_ON(!pte_chain);

	hlist_add_head(&pte_chain->link, &page->parent_ptes);

	hlist_add_head(&pte_chain->link, &sp->parent_ptes);

	pte_chain->parent_ptes[0] = parent_pte;

}



static void mmu_page_remove_parent_pte(struct kvm_mmu_page *page,

static void mmu_page_remove_parent_pte(struct kvm_mmu_page *sp,

				       u64 *parent_pte)

{

	struct kvm_pte_chain *pte_chain;

	struct hlist_node *node;

	int i;



	if (!page->multimapped) {

		BUG_ON(page->parent_pte != parent_pte);

		page->parent_pte = NULL;

	if (!sp->multimapped) {

		BUG_ON(sp->parent_pte != parent_pte);

		sp->parent_pte = NULL;

		return;

	}

	hlist_for_each_entry(pte_chain, node, &page->parent_ptes, link)

	hlist_for_each_entry(pte_chain, node, &sp->parent_ptes, link)

		for (i = 0; i < NR_PTE_CHAIN_ENTRIES; ++i) {

			if (!pte_chain->parent_ptes[i])

				break;
@@ -640,9 +638,9 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *page, 
			if (i == 0) {

				hlist_del(&pte_chain->link);

				mmu_free_pte_chain(pte_chain);

				if (hlist_empty(&page->parent_ptes)) {

					page->multimapped = 0;

					page->parent_pte = NULL;

				if (hlist_empty(&sp->parent_ptes)) {

					sp->multimapped = 0;

					sp->parent_pte = NULL;

				}

			}

			return;
@@ -650,22 +648,21 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *page, 
	BUG();

}



static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm,

						gfn_t gfn)

static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm, gfn_t gfn)

{

	unsigned index;

	struct hlist_head *bucket;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct hlist_node *node;



	pgprintk("%s: looking for gfn %lx\n", __FUNCTION__, gfn);

	index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES;

	bucket = &kvm->mmu_page_hash[index];

	hlist_for_each_entry(page, node, bucket, hash_link)

		if (page->gfn == gfn && !page->role.metaphysical) {

	hlist_for_each_entry(sp, node, bucket, hash_link)

		if (sp->gfn == gfn && !sp->role.metaphysical) {

			pgprintk("%s: found role %x\n",

				 __FUNCTION__, page->role.word);

			return page;

				 __FUNCTION__, sp->role.word);

			return sp;

		}

	return NULL;

}
@@ -682,7 +679,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, 
	unsigned index;

	unsigned quadrant;

	struct hlist_head *bucket;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct hlist_node *node;



	role.word = 0;
@@ -699,35 +696,35 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, 
		 gfn, role.word);

	index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES;

	bucket = &vcpu->kvm->mmu_page_hash[index];

	hlist_for_each_entry(page, node, bucket, hash_link)

		if (page->gfn == gfn && page->role.word == role.word) {

			mmu_page_add_parent_pte(vcpu, page, parent_pte);

	hlist_for_each_entry(sp, node, bucket, hash_link)

		if (sp->gfn == gfn && sp->role.word == role.word) {

			mmu_page_add_parent_pte(vcpu, sp, parent_pte);

			pgprintk("%s: found\n", __FUNCTION__);

			return page;

			return sp;

		}

	page = kvm_mmu_alloc_page(vcpu, parent_pte);

	if (!page)

		return page;

	sp = kvm_mmu_alloc_page(vcpu, parent_pte);

	if (!sp)

		return sp;

	pgprintk("%s: adding gfn %lx role %x\n", __FUNCTION__, gfn, role.word);

	page->gfn = gfn;

	page->role = role;

	hlist_add_head(&page->hash_link, bucket);

	vcpu->mmu.prefetch_page(vcpu, page);

	sp->gfn = gfn;

	sp->role = role;

	hlist_add_head(&sp->hash_link, bucket);

	vcpu->mmu.prefetch_page(vcpu, sp);

	if (!metaphysical)

		rmap_write_protect(vcpu->kvm, gfn);

	return page;

	return sp;

}



static void kvm_mmu_page_unlink_children(struct kvm *kvm,

					 struct kvm_mmu_page *page)

					 struct kvm_mmu_page *sp)

{

	unsigned i;

	u64 *pt;

	u64 ent;



	pt = page->spt;

	pt = sp->spt;



	if (page->role.level == PT_PAGE_TABLE_LEVEL) {

	if (sp->role.level == PT_PAGE_TABLE_LEVEL) {

		for (i = 0; i < PT64_ENT_PER_PAGE; ++i) {

			if (is_shadow_present_pte(pt[i]))

				rmap_remove(kvm, &pt[i]);
@@ -749,10 +746,9 @@ static void kvm_mmu_page_unlink_children(struct kvm *kvm, 
	kvm_flush_remote_tlbs(kvm);

}



static void kvm_mmu_put_page(struct kvm_mmu_page *page,

			     u64 *parent_pte)

static void kvm_mmu_put_page(struct kvm_mmu_page *sp, u64 *parent_pte)

{

	mmu_page_remove_parent_pte(page, parent_pte);

	mmu_page_remove_parent_pte(sp, parent_pte);

}



static void kvm_mmu_reset_last_pte_updated(struct kvm *kvm)
@@ -764,32 +760,31 @@ static void kvm_mmu_reset_last_pte_updated(struct kvm *kvm) 
			kvm->vcpus[i]->last_pte_updated = NULL;

}



static void kvm_mmu_zap_page(struct kvm *kvm,

			     struct kvm_mmu_page *page)

static void kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp)

{

	u64 *parent_pte;



	++kvm->stat.mmu_shadow_zapped;

	while (page->multimapped || page->parent_pte) {

		if (!page->multimapped)

			parent_pte = page->parent_pte;

	while (sp->multimapped || sp->parent_pte) {

		if (!sp->multimapped)

			parent_pte = sp->parent_pte;

		else {

			struct kvm_pte_chain *chain;



			chain = container_of(page->parent_ptes.first,

			chain = container_of(sp->parent_ptes.first,

					     struct kvm_pte_chain, link);

			parent_pte = chain->parent_ptes[0];

		}

		BUG_ON(!parent_pte);

		kvm_mmu_put_page(page, parent_pte);

		kvm_mmu_put_page(sp, parent_pte);

		set_shadow_pte(parent_pte, shadow_trap_nonpresent_pte);

	}

	kvm_mmu_page_unlink_children(kvm, page);

	if (!page->root_count) {

		hlist_del(&page->hash_link);

		kvm_mmu_free_page(kvm, page);

	kvm_mmu_page_unlink_children(kvm, sp);

	if (!sp->root_count) {

		hlist_del(&sp->hash_link);

		kvm_mmu_free_page(kvm, sp);

	} else

		list_move(&page->link, &kvm->active_mmu_pages);

		list_move(&sp->link, &kvm->active_mmu_pages);

	kvm_mmu_reset_last_pte_updated(kvm);

}
@@ -831,7 +826,7 @@ static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn) 
{

	unsigned index;

	struct hlist_head *bucket;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct hlist_node *node, *n;

	int r;
@@ -839,11 +834,11 @@ static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn) 
	r = 0;

	index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES;

	bucket = &kvm->mmu_page_hash[index];

	hlist_for_each_entry_safe(page, node, n, bucket, hash_link)

		if (page->gfn == gfn && !page->role.metaphysical) {

	hlist_for_each_entry_safe(sp, node, n, bucket, hash_link)

		if (sp->gfn == gfn && !sp->role.metaphysical) {

			pgprintk("%s: gfn %lx role %x\n", __FUNCTION__, gfn,

				 page->role.word);

			kvm_mmu_zap_page(kvm, page);

				 sp->role.word);

			kvm_mmu_zap_page(kvm, sp);

			r = 1;

		}

	return r;
@@ -851,21 +846,20 @@ static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn) 


static void mmu_unshadow(struct kvm *kvm, gfn_t gfn)

{

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;



	while ((page = kvm_mmu_lookup_page(kvm, gfn)) != NULL) {

		pgprintk("%s: zap %lx %x\n",

			 __FUNCTION__, gfn, page->role.word);

		kvm_mmu_zap_page(kvm, page);

	while ((sp = kvm_mmu_lookup_page(kvm, gfn)) != NULL) {

		pgprintk("%s: zap %lx %x\n", __FUNCTION__, gfn, sp->role.word);

		kvm_mmu_zap_page(kvm, sp);

	}

}



static void page_header_update_slot(struct kvm *kvm, void *pte, gfn_t gfn)

{

	int slot = memslot_id(kvm, gfn_to_memslot(kvm, gfn));

	struct kvm_mmu_page *page_head = page_header(__pa(pte));

	struct kvm_mmu_page *sp = page_header(__pa(pte));



	__set_bit(slot, &page_head->slot_bitmap);

	__set_bit(slot, &sp->slot_bitmap);

}



struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva)
@@ -951,7 +945,7 @@ static void nonpaging_prefetch_page(struct kvm_vcpu *vcpu, 
static void mmu_free_roots(struct kvm_vcpu *vcpu)

{

	int i;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;



	if (!VALID_PAGE(vcpu->mmu.root_hpa))

		return;
@@ -959,8 +953,8 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu) 
	if (vcpu->mmu.shadow_root_level == PT64_ROOT_LEVEL) {

		hpa_t root = vcpu->mmu.root_hpa;



		page = page_header(root);

		--page->root_count;

		sp = page_header(root);

		--sp->root_count;

		vcpu->mmu.root_hpa = INVALID_PAGE;

		return;

	}
@@ -970,8 +964,8 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu) 


		if (root) {

			root &= PT64_BASE_ADDR_MASK;

			page = page_header(root);

			--page->root_count;

			sp = page_header(root);

			--sp->root_count;

		}

		vcpu->mmu.pae_root[i] = INVALID_PAGE;

	}
@@ -982,7 +976,7 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu) 
{

	int i;

	gfn_t root_gfn;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;



	root_gfn = vcpu->cr3 >> PAGE_SHIFT;
@@ -991,10 +985,10 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu) 
		hpa_t root = vcpu->mmu.root_hpa;



		ASSERT(!VALID_PAGE(root));

		page = kvm_mmu_get_page(vcpu, root_gfn, 0,

		sp = kvm_mmu_get_page(vcpu, root_gfn, 0,

				      PT64_ROOT_LEVEL, 0, 0, NULL);

		root = __pa(page->spt);

		++page->root_count;

		root = __pa(sp->spt);

		++sp->root_count;

		vcpu->mmu.root_hpa = root;

		return;

	}
@@ -1011,11 +1005,11 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu) 
			root_gfn = vcpu->pdptrs[i] >> PAGE_SHIFT;

		} else if (vcpu->mmu.root_level == 0)

			root_gfn = 0;

		page = kvm_mmu_get_page(vcpu, root_gfn, i << 30,

		sp = kvm_mmu_get_page(vcpu, root_gfn, i << 30,

				      PT32_ROOT_LEVEL, !is_paging(vcpu),

				      0, NULL);

		root = __pa(page->spt);

		++page->root_count;

		root = __pa(sp->spt);

		++sp->root_count;

		vcpu->mmu.pae_root[i] = root | PT_PRESENT_MASK;

	}

	vcpu->mmu.root_hpa = __pa(vcpu->mmu.pae_root);
@@ -1196,7 +1190,7 @@ void kvm_mmu_unload(struct kvm_vcpu *vcpu) 
}



static void mmu_pte_write_zap_pte(struct kvm_vcpu *vcpu,

				  struct kvm_mmu_page *page,

				  struct kvm_mmu_page *sp,

				  u64 *spte)

{

	u64 pte;
@@ -1204,7 +1198,7 @@ static void mmu_pte_write_zap_pte(struct kvm_vcpu *vcpu, 


	pte = *spte;

	if (is_shadow_present_pte(pte)) {

		if (page->role.level == PT_PAGE_TABLE_LEVEL)

		if (sp->role.level == PT_PAGE_TABLE_LEVEL)

			rmap_remove(vcpu->kvm, spte);

		else {

			child = page_header(pte & PT64_BASE_ADDR_MASK);
@@ -1215,23 +1209,21 @@ static void mmu_pte_write_zap_pte(struct kvm_vcpu *vcpu, 
}



static void mmu_pte_write_new_pte(struct kvm_vcpu *vcpu,

				  struct kvm_mmu_page *page,

				  struct kvm_mmu_page *sp,

				  u64 *spte,

				  const void *new, int bytes,

				  int offset_in_pte)

{

	if (page->role.level != PT_PAGE_TABLE_LEVEL) {

	if (sp->role.level != PT_PAGE_TABLE_LEVEL) {

		++vcpu->kvm->stat.mmu_pde_zapped;

		return;

	}



	++vcpu->kvm->stat.mmu_pte_updated;

	if (page->role.glevels == PT32_ROOT_LEVEL)

		paging32_update_pte(vcpu, page, spte, new, bytes,

				    offset_in_pte);

	if (sp->role.glevels == PT32_ROOT_LEVEL)

		paging32_update_pte(vcpu, sp, spte, new, bytes, offset_in_pte);

	else

		paging64_update_pte(vcpu, page, spte, new, bytes,

				    offset_in_pte);

		paging64_update_pte(vcpu, sp, spte, new, bytes, offset_in_pte);

}



static bool need_remote_flush(u64 old, u64 new)
@@ -1266,7 +1258,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 
		       const u8 *new, int bytes)

{

	gfn_t gfn = gpa >> PAGE_SHIFT;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct hlist_node *node, *n;

	struct hlist_head *bucket;

	unsigned index;
@@ -1296,10 +1288,10 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 
	}

	index = kvm_page_table_hashfn(gfn) % KVM_NUM_MMU_PAGES;

	bucket = &vcpu->kvm->mmu_page_hash[index];

	hlist_for_each_entry_safe(page, node, n, bucket, hash_link) {

		if (page->gfn != gfn || page->role.metaphysical)

	hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) {

		if (sp->gfn != gfn || sp->role.metaphysical)

			continue;

		pte_size = page->role.glevels == PT32_ROOT_LEVEL ? 4 : 8;

		pte_size = sp->role.glevels == PT32_ROOT_LEVEL ? 4 : 8;

		misaligned = (offset ^ (offset + bytes - 1)) & ~(pte_size - 1);

		misaligned |= bytes < 4;

		if (misaligned || flooded) {
@@ -1314,15 +1306,15 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 
			 * page.

			 */

			pgprintk("misaligned: gpa %llx bytes %d role %x\n",

				 gpa, bytes, page->role.word);

			kvm_mmu_zap_page(vcpu->kvm, page);

				 gpa, bytes, sp->role.word);

			kvm_mmu_zap_page(vcpu->kvm, sp);

			++vcpu->kvm->stat.mmu_flooded;

			continue;

		}

		page_offset = offset;

		level = page->role.level;

		level = sp->role.level;

		npte = 1;

		if (page->role.glevels == PT32_ROOT_LEVEL) {

		if (sp->role.glevels == PT32_ROOT_LEVEL) {

			page_offset <<= 1;	/* 32->64 */

			/*

			 * A 32-bit pde maps 4MB while the shadow pdes map
@@ -1336,14 +1328,14 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, 
			}

			quadrant = page_offset >> PAGE_SHIFT;

			page_offset &= ~PAGE_MASK;

			if (quadrant != page->role.quadrant)

			if (quadrant != sp->role.quadrant)

				continue;

		}

		spte = &page->spt[page_offset / sizeof(*spte)];

		spte = &sp->spt[page_offset / sizeof(*spte)];

		while (npte--) {

			entry = *spte;

			mmu_pte_write_zap_pte(vcpu, page, spte);

			mmu_pte_write_new_pte(vcpu, page, spte, new, bytes,

			mmu_pte_write_zap_pte(vcpu, sp, spte);

			mmu_pte_write_new_pte(vcpu, sp, spte, new, bytes,

					      page_offset & (pte_size - 1));

			mmu_pte_write_flush_tlb(vcpu, entry, *spte);

			++spte;
@@ -1362,11 +1354,11 @@ int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva) 
void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)

{

	while (vcpu->kvm->n_free_mmu_pages < KVM_REFILL_PAGES) {

		struct kvm_mmu_page *page;

		struct kvm_mmu_page *sp;



		page = container_of(vcpu->kvm->active_mmu_pages.prev,

		sp = container_of(vcpu->kvm->active_mmu_pages.prev,

				  struct kvm_mmu_page, link);

		kvm_mmu_zap_page(vcpu->kvm, page);

		kvm_mmu_zap_page(vcpu->kvm, sp);

		++vcpu->kvm->stat.mmu_recycled;

	}

}
@@ -1413,12 +1405,12 @@ EXPORT_SYMBOL_GPL(kvm_mmu_page_fault); 


static void free_mmu_pages(struct kvm_vcpu *vcpu)

{

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;



	while (!list_empty(&vcpu->kvm->active_mmu_pages)) {

		page = container_of(vcpu->kvm->active_mmu_pages.next,

		sp = container_of(vcpu->kvm->active_mmu_pages.next,

				  struct kvm_mmu_page, link);

		kvm_mmu_zap_page(vcpu->kvm, page);

		kvm_mmu_zap_page(vcpu->kvm, sp);

	}

	free_page((unsigned long)vcpu->mmu.pae_root);

}
@@ -1480,16 +1472,16 @@ void kvm_mmu_destroy(struct kvm_vcpu *vcpu) 


void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot)

{

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;



	list_for_each_entry(page, &kvm->active_mmu_pages, link) {

	list_for_each_entry(sp, &kvm->active_mmu_pages, link) {

		int i;

		u64 *pt;



		if (!test_bit(slot, &page->slot_bitmap))

		if (!test_bit(slot, &sp->slot_bitmap))

			continue;



		pt = page->spt;

		pt = sp->spt;

		for (i = 0; i < PT64_ENT_PER_PAGE; ++i)

			/* avoid RMW */

			if (pt[i] & PT_WRITABLE_MASK)
@@ -1499,10 +1491,10 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot) 


void kvm_mmu_zap_all(struct kvm *kvm)

{

	struct kvm_mmu_page *page, *node;

	struct kvm_mmu_page *sp, *node;



	list_for_each_entry_safe(page, node, &kvm->active_mmu_pages, link)

		kvm_mmu_zap_page(kvm, page);

	list_for_each_entry_safe(sp, node, &kvm->active_mmu_pages, link)

		kvm_mmu_zap_page(kvm, sp);



	kvm_flush_remote_tlbs(kvm);

}
@@ -1668,13 +1660,13 @@ static int count_rmaps(struct kvm_vcpu *vcpu) 
static int count_writable_mappings(struct kvm_vcpu *vcpu)

{

	int nmaps = 0;

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	int i;



	list_for_each_entry(page, &vcpu->kvm->active_mmu_pages, link) {

		u64 *pt = page->spt;

	list_for_each_entry(sp, &vcpu->kvm->active_mmu_pages, link) {

		u64 *pt = sp->spt;



		if (page->role.level != PT_PAGE_TABLE_LEVEL)

		if (sp->role.level != PT_PAGE_TABLE_LEVEL)

			continue;



		for (i = 0; i < PT64_ENT_PER_PAGE; ++i) {
@@ -1702,23 +1694,23 @@ static void audit_rmap(struct kvm_vcpu *vcpu) 


static void audit_write_protection(struct kvm_vcpu *vcpu)

{

	struct kvm_mmu_page *page;

	struct kvm_mmu_page *sp;

	struct kvm_memory_slot *slot;

	unsigned long *rmapp;

	gfn_t gfn;



	list_for_each_entry(page, &vcpu->kvm->active_mmu_pages, link) {

		if (page->role.metaphysical)

	list_for_each_entry(sp, &vcpu->kvm->active_mmu_pages, link) {

		if (sp->role.metaphysical)

			continue;



		slot = gfn_to_memslot(vcpu->kvm, page->gfn);

		gfn = unalias_gfn(vcpu->kvm, page->gfn);

		slot = gfn_to_memslot(vcpu->kvm, sp->gfn);

		gfn = unalias_gfn(vcpu->kvm, sp->gfn);

		rmapp = &slot->rmap[gfn - slot->base_gfn];

		if (*rmapp)

			printk(KERN_ERR "%s: (%s) shadow page has writable"

			       " mappings: gfn %lx role %x\n",

			       __FUNCTION__, audit_msg, page->gfn,

			       page->role.word);

			       __FUNCTION__, audit_msg, sp->gfn,

			       sp->role.word);

	}

}

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