1 files changed, 114 insertions, 111 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 19a8906bcaa..81563e76e28 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -148,7 +148,6 @@ module_param(oos_shadow, bool, 0644);
 
 #include <trace/events/kvm.h>
 
-#undef TRACE_INCLUDE_FILE
 #define CREATE_TRACE_POINTS
 #include "mmutrace.h"
 
@@ -174,12 +173,7 @@ struct kvm_shadow_walk_iterator {
              shadow_walk_okay(&(_walker));                      \
              shadow_walk_next(&(_walker)))
 
-
-struct kvm_unsync_walk {
-        int (*entry) (struct kvm_mmu_page *sp, struct kvm_unsync_walk *walk);
-};
-
-typedef int (*mmu_parent_walk_fn) (struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp);
+typedef int (*mmu_parent_walk_fn) (struct kvm_mmu_page *sp);
 
 static struct kmem_cache *pte_chain_cache;
 static struct kmem_cache *rmap_desc_cache;
@@ -223,7 +217,7 @@ void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_set_mask_ptes);
 
-static int is_write_protection(struct kvm_vcpu *vcpu)
+static bool is_write_protection(struct kvm_vcpu *vcpu)
 {
         return kvm_read_cr0_bits(vcpu, X86_CR0_WP);
 }
@@ -327,7 +321,6 @@ static int mmu_topup_memory_cache_page(struct kvm_mmu_memory_cache *cache,
                 page = alloc_page(GFP_KERNEL);
                 if (!page)
                         return -ENOMEM;
-                set_page_private(page, 0);
                 cache->objects[cache->nobjs++] = page_address(page);
         }
         return 0;
@@ -438,9 +431,9 @@ static void unaccount_shadowed(struct kvm *kvm, gfn_t gfn)
         int i;
 
         gfn = unalias_gfn(kvm, gfn);
+        slot = gfn_to_memslot_unaliased(kvm, gfn);
         for (i = PT_DIRECTORY_LEVEL;
              i < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++i) {
-                slot          = gfn_to_memslot_unaliased(kvm, gfn);
                 write_count   = slot_largepage_idx(gfn, slot, i);
                 *write_count -= 1;
                 WARN_ON(*write_count < 0);
@@ -654,7 +647,6 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
 static u64 *rmap_next(struct kvm *kvm, unsigned long *rmapp, u64 *spte)
 {
         struct kvm_rmap_desc *desc;
-        struct kvm_rmap_desc *prev_desc;
         u64 *prev_spte;
         int i;
 
@@ -666,7 +658,6 @@ static u64 *rmap_next(struct kvm *kvm, unsigned long *rmapp, u64 *spte)
                 return NULL;
         }
         desc = (struct kvm_rmap_desc *)(*rmapp & ~1ul);
-        prev_desc = NULL;
         prev_spte = NULL;
         while (desc) {
                 for (i = 0; i < RMAP_EXT && desc->sptes[i]; ++i) {
@@ -794,7 +785,7 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
         int retval = 0;
         struct kvm_memslots *slots;
 
-        slots = rcu_dereference(kvm->memslots);
+        slots = kvm_memslots(kvm);
 
         for (i = 0; i < slots->nmemslots; i++) {
                 struct kvm_memory_slot *memslot = &slots->memslots[i];
@@ -925,7 +916,6 @@ static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,
         sp->gfns = mmu_memory_cache_alloc(&vcpu->arch.mmu_page_cache, PAGE_SIZE);
         set_page_private(virt_to_page(sp->spt), (unsigned long)sp);
         list_add(&sp->link, &vcpu->kvm->arch.active_mmu_pages);
-        INIT_LIST_HEAD(&sp->oos_link);
         bitmap_zero(sp->slot_bitmap, KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS);
         sp->multimapped = 0;
         sp->parent_pte = parent_pte;
@@ -1009,8 +999,7 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *sp,
 }
 
 
-static void mmu_parent_walk(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
-                            mmu_parent_walk_fn fn)
+static void mmu_parent_walk(struct kvm_mmu_page *sp, mmu_parent_walk_fn fn)
 {
         struct kvm_pte_chain *pte_chain;
         struct hlist_node *node;
@@ -1019,8 +1008,8 @@ static void mmu_parent_walk(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 
         if (!sp->multimapped && sp->parent_pte) {
                 parent_sp = page_header(__pa(sp->parent_pte));
-                fn(vcpu, parent_sp);
-                mmu_parent_walk(vcpu, parent_sp, fn);
+                fn(parent_sp);
+                mmu_parent_walk(parent_sp, fn);
                 return;
         }
         hlist_for_each_entry(pte_chain, node, &sp->parent_ptes, link)
@@ -1028,8 +1017,8 @@ static void mmu_parent_walk(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
                         if (!pte_chain->parent_ptes[i])
                                 break;
                         parent_sp = page_header(__pa(pte_chain->parent_ptes[i]));
-                        fn(vcpu, parent_sp);
-                        mmu_parent_walk(vcpu, parent_sp, fn);
+                        fn(parent_sp);
+                        mmu_parent_walk(parent_sp, fn);
                 }
 }
 
@@ -1066,16 +1055,15 @@ static void kvm_mmu_update_parents_unsync(struct kvm_mmu_page *sp)
                 }
 }
 
-static int unsync_walk_fn(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
+static int unsync_walk_fn(struct kvm_mmu_page *sp)
 {
         kvm_mmu_update_parents_unsync(sp);
         return 1;
 }
 
-static void kvm_mmu_mark_parents_unsync(struct kvm_vcpu *vcpu,
-                                        struct kvm_mmu_page *sp)
+static void kvm_mmu_mark_parents_unsync(struct kvm_mmu_page *sp)
 {
-        mmu_parent_walk(vcpu, sp, unsync_walk_fn);
+        mmu_parent_walk(sp, unsync_walk_fn);
         kvm_mmu_update_parents_unsync(sp);
 }
 
@@ -1201,6 +1189,7 @@ static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm, gfn_t gfn)
 static void kvm_unlink_unsync_page(struct kvm *kvm, struct kvm_mmu_page *sp)
 {
         WARN_ON(!sp->unsync);
+        trace_kvm_mmu_sync_page(sp);
         sp->unsync = 0;
         --kvm->stat.mmu_unsync;
 }
@@ -1209,12 +1198,11 @@ static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp);
 
 static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
 {
-        if (sp->role.glevels != vcpu->arch.mmu.root_level) {
+        if (sp->role.cr4_pae != !!is_pae(vcpu)) {
                 kvm_mmu_zap_page(vcpu->kvm, sp);
                 return 1;
         }
 
-        trace_kvm_mmu_sync_page(sp);
         if (rmap_write_protect(vcpu->kvm, sp->gfn))
                 kvm_flush_remote_tlbs(vcpu->kvm);
         kvm_unlink_unsync_page(vcpu->kvm, sp);
@@ -1331,6 +1319,8 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
         role = vcpu->arch.mmu.base_role;
         role.level = level;
         role.direct = direct;
+        if (role.direct)
+                role.cr4_pae = 0;
         role.access = access;
         if (vcpu->arch.mmu.root_level <= PT32_ROOT_LEVEL) {
                 quadrant = gaddr >> (PAGE_SHIFT + (PT64_PT_BITS * level));
@@ -1351,7 +1341,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
                         mmu_page_add_parent_pte(vcpu, sp, parent_pte);
                         if (sp->unsync_children) {
                                 set_bit(KVM_REQ_MMU_SYNC, &vcpu->requests);
-                                kvm_mmu_mark_parents_unsync(vcpu, sp);
+                                kvm_mmu_mark_parents_unsync(sp);
                         }
                         trace_kvm_mmu_get_page(sp, false);
                         return sp;
@@ -1573,13 +1563,14 @@ static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
         r = 0;
         index = kvm_page_table_hashfn(gfn);
         bucket = &kvm->arch.mmu_page_hash[index];
+restart:
         hlist_for_each_entry_safe(sp, node, n, bucket, hash_link)
                 if (sp->gfn == gfn && !sp->role.direct) {
                         pgprintk("%s: gfn %lx role %x\n", __func__, gfn,
                                  sp->role.word);
                         r = 1;
                         if (kvm_mmu_zap_page(kvm, sp))
-                                n = bucket->first;
+                                goto restart;
                 }
         return r;
 }
@@ -1593,13 +1584,14 @@ static void mmu_unshadow(struct kvm *kvm, gfn_t gfn)
 
         index = kvm_page_table_hashfn(gfn);
         bucket = &kvm->arch.mmu_page_hash[index];
+restart:
         hlist_for_each_entry_safe(sp, node, nn, bucket, hash_link) {
                 if (sp->gfn == gfn && !sp->role.direct
                     && !sp->role.invalid) {
                         pgprintk("%s: zap %lx %x\n",
                                  __func__, gfn, sp->role.word);
                         if (kvm_mmu_zap_page(kvm, sp))
-                                nn = bucket->first;
+                                goto restart;
                 }
         }
 }
@@ -1626,20 +1618,6 @@ static void mmu_convert_notrap(struct kvm_mmu_page *sp)
         }
 }
 
-struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva)
-{
-        struct page *page;
-
-        gpa_t gpa = kvm_mmu_gva_to_gpa_read(vcpu, gva, NULL);
-
-        if (gpa == UNMAPPED_GVA)
-                return NULL;
-
-        page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
-
-        return page;
-}
-
 /*
  * The function is based on mtrr_type_lookup() in
  * arch/x86/kernel/cpu/mtrr/generic.c
@@ -1752,7 +1730,6 @@ static int kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
         struct kvm_mmu_page *s;
         struct hlist_node *node, *n;
 
-        trace_kvm_mmu_unsync_page(sp);
         index = kvm_page_table_hashfn(sp->gfn);
         bucket = &vcpu->kvm->arch.mmu_page_hash[index];
         /* don't unsync if pagetable is shadowed with multiple roles */
@@ -1762,10 +1739,11 @@ static int kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
                 if (s->role.word != sp->role.word)
                         return 1;
         }
+        trace_kvm_mmu_unsync_page(sp);
         ++vcpu->kvm->stat.mmu_unsync;
         sp->unsync = 1;
 
-        kvm_mmu_mark_parents_unsync(vcpu, sp);
+        kvm_mmu_mark_parents_unsync(sp);
 
         mmu_convert_notrap(sp);
         return 0;
@@ -2081,21 +2059,23 @@ static int mmu_alloc_roots(struct kvm_vcpu *vcpu)
                 hpa_t root = vcpu->arch.mmu.root_hpa;
 
                 ASSERT(!VALID_PAGE(root));
-                if (tdp_enabled)
-                        direct = 1;
                 if (mmu_check_root(vcpu, root_gfn))
                         return 1;
+                if (tdp_enabled) {
+                        direct = 1;
+                        root_gfn = 0;
+                }
+                spin_lock(&vcpu->kvm->mmu_lock);
                 sp = kvm_mmu_get_page(vcpu, root_gfn, 0,
                                       PT64_ROOT_LEVEL, direct,
                                       ACC_ALL, NULL);
                 root = __pa(sp->spt);
                 ++sp->root_count;
+                spin_unlock(&vcpu->kvm->mmu_lock);
                 vcpu->arch.mmu.root_hpa = root;
                 return 0;
         }
         direct = !is_paging(vcpu);
-        if (tdp_enabled)
-                direct = 1;
         for (i = 0; i < 4; ++i) {
                 hpa_t root = vcpu->arch.mmu.pae_root[i];
 
@@ -2111,11 +2091,18 @@ static int mmu_alloc_roots(struct kvm_vcpu *vcpu)
                         root_gfn = 0;
                 if (mmu_check_root(vcpu, root_gfn))
                         return 1;
+                if (tdp_enabled) {
+                        direct = 1;
+                        root_gfn = i << 30;
+                }
+                spin_lock(&vcpu->kvm->mmu_lock);
                 sp = kvm_mmu_get_page(vcpu, root_gfn, i << 30,
                                       PT32_ROOT_LEVEL, direct,
                                       ACC_ALL, NULL);
                 root = __pa(sp->spt);
                 ++sp->root_count;
+                spin_unlock(&vcpu->kvm->mmu_lock);
+
                 vcpu->arch.mmu.pae_root[i] = root | PT_PRESENT_MASK;
         }
         vcpu->arch.mmu.root_hpa = __pa(vcpu->arch.mmu.pae_root);
@@ -2299,13 +2286,19 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int level)
                 /* no rsvd bits for 2 level 4K page table entries */
                 context->rsvd_bits_mask[0][1] = 0;
                 context->rsvd_bits_mask[0][0] = 0;
+                context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[0][0];
+
+                if (!is_pse(vcpu)) {
+                        context->rsvd_bits_mask[1][1] = 0;
+                        break;
+                }
+
                 if (is_cpuid_PSE36())
                         /* 36bits PSE 4MB page */
                         context->rsvd_bits_mask[1][1] = rsvd_bits(17, 21);
                 else
                         /* 32 bits PSE 4MB page */
                         context->rsvd_bits_mask[1][1] = rsvd_bits(13, 21);
-                context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[1][0];
                 break;
         case PT32E_ROOT_LEVEL:
                 context->rsvd_bits_mask[0][2] =
@@ -2318,7 +2311,7 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int level)
                 context->rsvd_bits_mask[1][1] = exb_bit_rsvd |
                         rsvd_bits(maxphyaddr, 62) |
                         rsvd_bits(13, 20);              /* large page */
-                context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[1][0];
+                context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[0][0];
                 break;
         case PT64_ROOT_LEVEL:
                 context->rsvd_bits_mask[0][3] = exb_bit_rsvd |
@@ -2336,7 +2329,7 @@ static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu, int level)
                 context->rsvd_bits_mask[1][1] = exb_bit_rsvd |
                         rsvd_bits(maxphyaddr, 51) |
                         rsvd_bits(13, 20);              /* large page */
-                context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[1][0];
+                context->rsvd_bits_mask[1][0] = context->rsvd_bits_mask[0][0];
                 break;
         }
 }
@@ -2438,7 +2431,8 @@ static int init_kvm_softmmu(struct kvm_vcpu *vcpu)
         else
                 r = paging32_init_context(vcpu);
 
-        vcpu->arch.mmu.base_role.glevels = vcpu->arch.mmu.root_level;
+        vcpu->arch.mmu.base_role.cr4_pae = !!is_pae(vcpu);
+        vcpu->arch.mmu.base_role.cr0_wp = is_write_protection(vcpu);
 
         return r;
 }
@@ -2478,7 +2472,9 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
                 goto out;
         spin_lock(&vcpu->kvm->mmu_lock);
         kvm_mmu_free_some_pages(vcpu);
+        spin_unlock(&vcpu->kvm->mmu_lock);
         r = mmu_alloc_roots(vcpu);
+        spin_lock(&vcpu->kvm->mmu_lock);
         mmu_sync_roots(vcpu);
         spin_unlock(&vcpu->kvm->mmu_lock);
         if (r)
@@ -2527,7 +2523,7 @@ static void mmu_pte_write_new_pte(struct kvm_vcpu *vcpu,
         }
 
         ++vcpu->kvm->stat.mmu_pte_updated;
-        if (sp->role.glevels == PT32_ROOT_LEVEL)
+        if (!sp->role.cr4_pae)
                 paging32_update_pte(vcpu, sp, spte, new);
         else
                 paging64_update_pte(vcpu, sp, spte, new);
@@ -2562,36 +2558,11 @@ static bool last_updated_pte_accessed(struct kvm_vcpu *vcpu)
 }
 
 static void mmu_guess_page_from_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
-                                          const u8 *new, int bytes)
+                                          u64 gpte)
 {
         gfn_t gfn;
-        int r;
-        u64 gpte = 0;
         pfn_t pfn;
 
-        if (bytes != 4 && bytes != 8)
-                return;
-
-        /*
-         * Assume that the pte write on a page table of the same type
-         * as the current vcpu paging mode.  This is nearly always true
-         * (might be false while changing modes).  Note it is verified later
-         * by update_pte().
-         */
-        if (is_pae(vcpu)) {
-                /* Handle a 32-bit guest writing two halves of a 64-bit gpte */
-                if ((bytes == 4) && (gpa % 4 == 0)) {
-                        r = kvm_read_guest(vcpu->kvm, gpa & ~(u64)7, &gpte, 8);
-                        if (r)
-                                return;
-                        memcpy((void *)&gpte + (gpa % 8), new, 4);
-                } else if ((bytes == 8) && (gpa % 8 == 0)) {
-                        memcpy((void *)&gpte, new, 8);
-                }
-        } else {
-                if ((bytes == 4) && (gpa % 4 == 0))
-                        memcpy((void *)&gpte, new, 4);
-        }
         if (!is_present_gpte(gpte))
                 return;
         gfn = (gpte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT;
@@ -2640,10 +2611,46 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
         int flooded = 0;
         int npte;
         int r;
+        int invlpg_counter;
 
         pgprintk("%s: gpa %llx bytes %d\n", __func__, gpa, bytes);
-        mmu_guess_page_from_pte_write(vcpu, gpa, new, bytes);
+
+        invlpg_counter = atomic_read(&vcpu->kvm->arch.invlpg_counter);
+
+        /*
+         * Assume that the pte write on a page table of the same type
+         * as the current vcpu paging mode.  This is nearly always true
+         * (might be false while changing modes).  Note it is verified later
+         * by update_pte().
+         */
+        if ((is_pae(vcpu) && bytes == 4) || !new) {
+                /* Handle a 32-bit guest writing two halves of a 64-bit gpte */
+                if (is_pae(vcpu)) {
+                        gpa &= ~(gpa_t)7;
+                        bytes = 8;
+                }
+                r = kvm_read_guest(vcpu->kvm, gpa, &gentry, min(bytes, 8));
+                if (r)
+                        gentry = 0;
+                new = (const u8 *)&gentry;
+        }
+
+        switch (bytes) {
+        case 4:
+                gentry = *(const u32 *)new;
+                break;
+        case 8:
+                gentry = *(const u64 *)new;
+                break;
+        default:
+                gentry = 0;
+                break;
+        }
+
+        mmu_guess_page_from_pte_write(vcpu, gpa, gentry);
         spin_lock(&vcpu->kvm->mmu_lock);
+        if (atomic_read(&vcpu->kvm->arch.invlpg_counter) != invlpg_counter)
+                gentry = 0;
         kvm_mmu_access_page(vcpu, gfn);
         kvm_mmu_free_some_pages(vcpu);
         ++vcpu->kvm->stat.mmu_pte_write;
@@ -2662,10 +2669,12 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
         }
         index = kvm_page_table_hashfn(gfn);
         bucket = &vcpu->kvm->arch.mmu_page_hash[index];
+
+restart:
         hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) {
                 if (sp->gfn != gfn || sp->role.direct || sp->role.invalid)
                         continue;
-                pte_size = sp->role.glevels == PT32_ROOT_LEVEL ? 4 : 8;
+                pte_size = sp->role.cr4_pae ? 8 : 4;
                 misaligned = (offset ^ (offset + bytes - 1)) & ~(pte_size - 1);
                 misaligned |= bytes < 4;
                 if (misaligned || flooded) {
@@ -2682,14 +2691,14 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
                         pgprintk("misaligned: gpa %llx bytes %d role %x\n",
                                  gpa, bytes, sp->role.word);
                         if (kvm_mmu_zap_page(vcpu->kvm, sp))
-                                n = bucket->first;
+                                goto restart;
                         ++vcpu->kvm->stat.mmu_flooded;
                         continue;
                 }
                 page_offset = offset;
                 level = sp->role.level;
                 npte = 1;
-                if (sp->role.glevels == PT32_ROOT_LEVEL) {
+                if (!sp->role.cr4_pae) {
                         page_offset <<= 1;      /* 32->64 */
                         /*
                          * A 32-bit pde maps 4MB while the shadow pdes map
@@ -2707,20 +2716,11 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
                                 continue;
                 }
                 spte = &sp->spt[page_offset / sizeof(*spte)];
-                if ((gpa & (pte_size - 1)) || (bytes < pte_size)) {
-                        gentry = 0;
-                        r = kvm_read_guest_atomic(vcpu->kvm,
-                                                  gpa & ~(u64)(pte_size - 1),
-                                                  &gentry, pte_size);
-                        new = (const void *)&gentry;
-                        if (r < 0)
-                                new = NULL;
-                }
                 while (npte--) {
                         entry = *spte;
                         mmu_pte_write_zap_pte(vcpu, sp, spte);
-                        if (new)
-                                mmu_pte_write_new_pte(vcpu, sp, spte, new);
+                        if (gentry)
+                                mmu_pte_write_new_pte(vcpu, sp, spte, &gentry);
                         mmu_pte_write_flush_tlb(vcpu, entry, *spte);
                         ++spte;
                 }
@@ -2900,22 +2900,23 @@ void kvm_mmu_zap_all(struct kvm *kvm)
         struct kvm_mmu_page *sp, *node;
 
         spin_lock(&kvm->mmu_lock);
+restart:
         list_for_each_entry_safe(sp, node, &kvm->arch.active_mmu_pages, link)
                 if (kvm_mmu_zap_page(kvm, sp))
-                        node = container_of(kvm->arch.active_mmu_pages.next,
-                                            struct kvm_mmu_page, link);
+                        goto restart;
+
         spin_unlock(&kvm->mmu_lock);
 
         kvm_flush_remote_tlbs(kvm);
 }
 
-static void kvm_mmu_remove_one_alloc_mmu_page(struct kvm *kvm)
+static int kvm_mmu_remove_some_alloc_mmu_pages(struct kvm *kvm)
 {
         struct kvm_mmu_page *page;
 
         page = container_of(kvm->arch.active_mmu_pages.prev,
                             struct kvm_mmu_page, link);
-        kvm_mmu_zap_page(kvm, page);
+        return kvm_mmu_zap_page(kvm, page) + 1;
 }
 
 static int mmu_shrink(int nr_to_scan, gfp_t gfp_mask)
@@ -2927,7 +2928,7 @@ static int mmu_shrink(int nr_to_scan, gfp_t gfp_mask)
         spin_lock(&kvm_lock);
 
         list_for_each_entry(kvm, &vm_list, vm_list) {
-                int npages, idx;
+                int npages, idx, freed_pages;
 
                 idx = srcu_read_lock(&kvm->srcu);
                 spin_lock(&kvm->mmu_lock);
@@ -2935,8 +2936,8 @@ static int mmu_shrink(int nr_to_scan, gfp_t gfp_mask)
                          kvm->arch.n_free_mmu_pages;
                 cache_count += npages;
                 if (!kvm_freed && nr_to_scan > 0 && npages > 0) {
-                        kvm_mmu_remove_one_alloc_mmu_page(kvm);
-                        cache_count--;
+                        freed_pages = kvm_mmu_remove_some_alloc_mmu_pages(kvm);
+                        cache_count -= freed_pages;
                         kvm_freed = kvm;
                 }
                 nr_to_scan--;
@@ -3011,7 +3012,8 @@ unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm)
         unsigned int  nr_pages = 0;
         struct kvm_memslots *slots;
 
-        slots = rcu_dereference(kvm->memslots);
+        slots = kvm_memslots(kvm);
+
         for (i = 0; i < slots->nmemslots; i++)
                 nr_pages += slots->memslots[i].npages;
 
@@ -3174,8 +3176,7 @@ static gva_t canonicalize(gva_t gva)
 }
 
 
-typedef void (*inspect_spte_fn) (struct kvm *kvm, struct kvm_mmu_page *sp,
-                                 u64 *sptep);
+typedef void (*inspect_spte_fn) (struct kvm *kvm, u64 *sptep);
 
 static void __mmu_spte_walk(struct kvm *kvm, struct kvm_mmu_page *sp,
                             inspect_spte_fn fn)
@@ -3191,7 +3192,7 @@ static void __mmu_spte_walk(struct kvm *kvm, struct kvm_mmu_page *sp,
                                 child = page_header(ent & PT64_BASE_ADDR_MASK);
                                 __mmu_spte_walk(kvm, child, fn);
                         } else
-                                fn(kvm, sp, &sp->spt[i]);
+                                fn(kvm, &sp->spt[i]);
                 }
         }
 }
@@ -3282,11 +3283,13 @@ static void audit_mappings(struct kvm_vcpu *vcpu)
 
 static int count_rmaps(struct kvm_vcpu *vcpu)
 {
+        struct kvm *kvm = vcpu->kvm;
+        struct kvm_memslots *slots;
         int nmaps = 0;
         int i, j, k, idx;
 
         idx = srcu_read_lock(&kvm->srcu);
-        slots = rcu_dereference(kvm->memslots);
+        slots = kvm_memslots(kvm);
         for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
                 struct kvm_memory_slot *m = &slots->memslots[i];
                 struct kvm_rmap_desc *d;
@@ -3315,7 +3318,7 @@ static int count_rmaps(struct kvm_vcpu *vcpu)
         return nmaps;
 }
 
-void inspect_spte_has_rmap(struct kvm *kvm, struct kvm_mmu_page *sp, u64 *sptep)
+void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
 {
         unsigned long *rmapp;
         struct kvm_mmu_page *rev_sp;
@@ -3331,14 +3334,14 @@ void inspect_spte_has_rmap(struct kvm *kvm, struct kvm_mmu_page *sp, u64 *sptep)
                         printk(KERN_ERR "%s: no memslot for gfn %ld\n",
                                          audit_msg, gfn);
                         printk(KERN_ERR "%s: index %ld of sp (gfn=%lx)\n",
-                                        audit_msg, sptep - rev_sp->spt,
+                               audit_msg, (long int)(sptep - rev_sp->spt),
                                         rev_sp->gfn);
                         dump_stack();
                         return;
                 }
 
                 rmapp = gfn_to_rmap(kvm, rev_sp->gfns[sptep - rev_sp->spt],
-                                    is_large_pte(*sptep));
+                                    rev_sp->role.level);
                 if (!*rmapp) {
                         if (!printk_ratelimit())
                                 return;
@@ -3373,7 +3376,7 @@ static void check_writable_mappings_rmap(struct kvm_vcpu *vcpu)
                                 continue;
                         if (!(ent & PT_WRITABLE_MASK))
                                 continue;
-                        inspect_spte_has_rmap(vcpu->kvm, sp, &pt[i]);
+                        inspect_spte_has_rmap(vcpu->kvm, &pt[i]);
                 }
         }
         return;