Merge branch 'topic/core-cleanup' into for-linus

[safe/jmp/linux-2.6] / arch / x86 / kvm / mmu.c

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 7397932..19a8906 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -31,6 +31,7 @@
 #include <linux/hugetlb.h>
 #include <linux/compiler.h>
 #include <linux/srcu.h>
+#include <linux/slab.h>
 
 #include <asm/page.h>
 #include <asm/cmpxchg.h>
@@ -138,12 +139,6 @@ module_param(oos_shadow, bool, 0644);
 #define PT64_PERM_MASK (PT_PRESENT_MASK | PT_WRITABLE_MASK | PT_USER_MASK \
                        | PT64_NX_MASK)
 
-#define PFERR_PRESENT_MASK (1U << 0)
-#define PFERR_WRITE_MASK (1U << 1)
-#define PFERR_USER_MASK (1U << 2)
-#define PFERR_RSVD_MASK (1U << 3)
-#define PFERR_FETCH_MASK (1U << 4)
-
 #define RMAP_EXT 4
 
 #define ACC_EXEC_MASK    1
@@ -1495,8 +1490,8 @@ static int mmu_zap_unsync_children(struct kvm *kvm,
                for_each_sp(pages, sp, parents, i) {
                        kvm_mmu_zap_page(kvm, sp);
                        mmu_pages_clear_parents(&parents);
+                       zapped++;
                }
-               zapped += pages.nr;
                kvm_mmu_pages_init(parent, &parents, &pages);
        }
 
@@ -1547,14 +1542,16 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
         */
 
        if (used_pages > kvm_nr_mmu_pages) {
-               while (used_pages > kvm_nr_mmu_pages) {
+               while (used_pages > kvm_nr_mmu_pages &&
+                       !list_empty(&kvm->arch.active_mmu_pages)) {
                        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);
+                       used_pages -= kvm_mmu_zap_page(kvm, page);
                        used_pages--;
                }
+               kvm_nr_mmu_pages = used_pages;
                kvm->arch.n_free_mmu_pages = 0;
        }
        else
@@ -1601,7 +1598,8 @@ static void mmu_unshadow(struct kvm *kvm, gfn_t gfn)
                    && !sp->role.invalid) {
                        pgprintk("%s: zap %lx %x\n",
                                 __func__, gfn, sp->role.word);
-                       kvm_mmu_zap_page(kvm, sp);
+                       if (kvm_mmu_zap_page(kvm, sp))
+                               nn = bucket->first;
                }
        }
 }
@@ -1632,7 +1630,7 @@ struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva)
 {
        struct page *page;
 
-       gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gva);
+       gpa_t gpa = kvm_mmu_gva_to_gpa_read(vcpu, gva, NULL);
 
        if (gpa == UNMAPPED_GVA)
                return NULL;
@@ -2155,8 +2153,11 @@ void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)
        spin_unlock(&vcpu->kvm->mmu_lock);
 }
 
-static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr)
+static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr,
+                                 u32 access, u32 *error)
 {
+       if (error)
+               *error = 0;
        return vaddr;
 }
 
@@ -2740,7 +2741,7 @@ int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva)
        if (tdp_enabled)
                return 0;
 
-       gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gva);
+       gpa = kvm_mmu_gva_to_gpa_read(vcpu, gva, NULL);
 
        spin_lock(&vcpu->kvm->mmu_lock);
        r = kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
@@ -3237,7 +3238,7 @@ static void audit_mappings_page(struct kvm_vcpu *vcpu, u64 page_pte,
                if (is_shadow_present_pte(ent) && !is_last_spte(ent, level))
                        audit_mappings_page(vcpu, ent, va, level - 1);
                else {
-                       gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, va);
+                       gpa_t gpa = kvm_mmu_gva_to_gpa_read(vcpu, va, NULL);
                        gfn_t gfn = gpa >> PAGE_SHIFT;
                        pfn_t pfn = gfn_to_pfn(vcpu->kvm, gfn);
                        hpa_t hpa = (hpa_t)pfn << PAGE_SHIFT;