1 files changed, 1 insertions, 278 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 8b750ff6911a..d2dad65a45f8 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3490,282 +3490,5 @@ int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4])
 EXPORT_SYMBOL_GPL(kvm_mmu_get_spte_hierarchy);
 
 #ifdef CONFIG_KVM_MMU_AUDIT
-static const char *audit_msg;
-
-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)
-{
-        int i;
-
-        for (i = 0; i < PT64_ENT_PER_PAGE; ++i) {
-                u64 ent = sp->spt[i];
-
-                if (is_shadow_present_pte(ent)) {
-                        if (!is_last_spte(ent, sp->role.level)) {
-                                struct kvm_mmu_page *child;
-                                child = page_header(ent & PT64_BASE_ADDR_MASK);
-                                __mmu_spte_walk(kvm, child, fn);
-                        } else
-                                fn(kvm, &sp->spt[i]);
-                }
-        }
-}
-
-static void mmu_spte_walk(struct kvm_vcpu *vcpu, inspect_spte_fn fn)
-{
-        int i;
-        struct kvm_mmu_page *sp;
-
-        if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
-                return;
-        if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) {
-                hpa_t root = vcpu->arch.mmu.root_hpa;
-                sp = page_header(root);
-                __mmu_spte_walk(vcpu->kvm, sp, fn);
-                return;
-        }
-        for (i = 0; i < 4; ++i) {
-                hpa_t root = vcpu->arch.mmu.pae_root[i];
-
-                if (root && VALID_PAGE(root)) {
-                        root &= PT64_BASE_ADDR_MASK;
-                        sp = page_header(root);
-                        __mmu_spte_walk(vcpu->kvm, sp, fn);
-                }
-        }
-        return;
-}
-
-static void audit_mappings_page(struct kvm_vcpu *vcpu, u64 page_pte,
-                                gva_t va, int level)
-{
-        u64 *pt = __va(page_pte & PT64_BASE_ADDR_MASK);
-        int i;
-        gva_t va_delta = 1ul << (PAGE_SHIFT + 9 * (level - 1));
-
-        for (i = 0; i < PT64_ENT_PER_PAGE; ++i, va += va_delta) {
-                u64 *sptep = pt + i;
-                struct kvm_mmu_page *sp;
-                gfn_t gfn;
-                pfn_t pfn;
-                hpa_t hpa;
-
-                sp = page_header(__pa(sptep));
-
-                if (sp->unsync) {
-                        if (level != PT_PAGE_TABLE_LEVEL) {
-                                printk(KERN_ERR "audit: (%s) error: unsync sp: %p level = %d\n",
-                                                audit_msg, sp, level);
-                                return;
-                        }
-
-                        if (*sptep == shadow_notrap_nonpresent_pte) {
-                                printk(KERN_ERR "audit: (%s) error: notrap spte in unsync sp: %p\n",
-                                                audit_msg, sp);
-                                return;
-                        }
-                }
-
-                if (sp->role.direct && *sptep == shadow_notrap_nonpresent_pte) {
-                        printk(KERN_ERR "audit: (%s) error: notrap spte in direct sp: %p\n",
-                                        audit_msg, sp);
-                        return;
-                }
-
-                if (!is_shadow_present_pte(*sptep) ||
-                      !is_last_spte(*sptep, level))
-                        return;
-
-                gfn = kvm_mmu_page_get_gfn(sp, sptep - sp->spt);
-                pfn = gfn_to_pfn_atomic(vcpu->kvm, gfn);
-
-                if (is_error_pfn(pfn)) {
-                        kvm_release_pfn_clean(pfn);
-                        return;
-                }
-
-                hpa =  pfn << PAGE_SHIFT;
-
-                if ((*sptep & PT64_BASE_ADDR_MASK) != hpa)
-                        printk(KERN_ERR "xx audit error: (%s) levels %d"
-                                           " gva %lx pfn %llx hpa %llx ent %llxn",
-                                           audit_msg, vcpu->arch.mmu.root_level,
-                                           va, pfn, hpa, *sptep);
-        }
-}
-
-static void audit_mappings(struct kvm_vcpu *vcpu)
-{
-        unsigned i;
-
-        if (vcpu->arch.mmu.root_level == 4)
-                audit_mappings_page(vcpu, vcpu->arch.mmu.root_hpa, 0, 4);
-        else
-                for (i = 0; i < 4; ++i)
-                        if (vcpu->arch.mmu.pae_root[i] & PT_PRESENT_MASK)
-                                audit_mappings_page(vcpu,
-                                                    vcpu->arch.mmu.pae_root[i],
-                                                    i << 30,
-                                                    2);
-}
-
-void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
-{
-        unsigned long *rmapp;
-        struct kvm_mmu_page *rev_sp;
-        gfn_t gfn;
-
-
-        rev_sp = page_header(__pa(sptep));
-        gfn = kvm_mmu_page_get_gfn(rev_sp, sptep - rev_sp->spt);
-
-        if (!gfn_to_memslot(kvm, gfn)) {
-                if (!printk_ratelimit())
-                        return;
-                printk(KERN_ERR "%s: no memslot for gfn %llx\n",
-                                 audit_msg, gfn);
-                printk(KERN_ERR "%s: index %ld of sp (gfn=%llx)\n",
-                       audit_msg, (long int)(sptep - rev_sp->spt),
-                                rev_sp->gfn);
-                dump_stack();
-                return;
-        }
-
-        rmapp = gfn_to_rmap(kvm, gfn, rev_sp->role.level);
-        if (!*rmapp) {
-                if (!printk_ratelimit())
-                        return;
-                printk(KERN_ERR "%s: no rmap for writable spte %llx\n",
-                                 audit_msg, *sptep);
-                dump_stack();
-        }
-}
-
-void audit_sptes_have_rmaps(struct kvm_vcpu *vcpu)
-{
-        mmu_spte_walk(vcpu, inspect_spte_has_rmap);
-}
-
-static void check_mappings_rmap(struct kvm_vcpu *vcpu)
-{
-        struct kvm_mmu_page *sp;
-        int i;
-
-        list_for_each_entry(sp, &vcpu->kvm->arch.active_mmu_pages, link) {
-                u64 *pt = sp->spt;
-
-                if (sp->role.level != PT_PAGE_TABLE_LEVEL)
-                        continue;
-
-                for (i = 0; i < PT64_ENT_PER_PAGE; ++i) {
-                        if (!is_rmap_spte(pt[i]))
-                                continue;
-
-                        inspect_spte_has_rmap(vcpu->kvm, &pt[i]);
-                }
-        }
-        return;
-}
-
-static void audit_rmap(struct kvm_vcpu *vcpu)
-{
-        check_mappings_rmap(vcpu);
-}
-
-static void audit_write_protection(struct kvm_vcpu *vcpu)
-{
-        struct kvm_mmu_page *sp;
-        struct kvm_memory_slot *slot;
-        unsigned long *rmapp;
-        u64 *spte;
-
-        list_for_each_entry(sp, &vcpu->kvm->arch.active_mmu_pages, link) {
-                if (sp->role.direct)
-                        continue;
-                if (sp->unsync)
-                        continue;
-                if (sp->role.invalid)
-                        continue;
-
-                slot = gfn_to_memslot(vcpu->kvm, sp->gfn);
-                rmapp = &slot->rmap[sp->gfn - slot->base_gfn];
-
-                spte = rmap_next(vcpu->kvm, rmapp, NULL);
-                while (spte) {
-                        if (is_writable_pte(*spte))
-                                printk(KERN_ERR "%s: (%s) shadow page has "
-                                "writable mappings: gfn %llx role %x\n",
-                               __func__, audit_msg, sp->gfn,
-                               sp->role.word);
-                        spte = rmap_next(vcpu->kvm, rmapp, spte);
-                }
-        }
-}
-
-static void kvm_mmu_audit(void *ignore, struct kvm_vcpu *vcpu, int audit_point)
-{
-        audit_msg = audit_point_name[audit_point];
-        audit_rmap(vcpu);
-        audit_write_protection(vcpu);
-        if (strcmp("pre pte write", audit_msg) != 0)
-                audit_mappings(vcpu);
-        audit_sptes_have_rmaps(vcpu);
-}
-
-static bool mmu_audit;
-
-static void mmu_audit_enable(void)
-{
-        int ret;
-
-        if (mmu_audit)
-                return;
-
-        ret = register_trace_kvm_mmu_audit(kvm_mmu_audit, NULL);
-        WARN_ON(ret);
-
-        mmu_audit = true;
-}
-
-static void mmu_audit_disable(void)
-{
-        if (!mmu_audit)
-                return;
-
-        unregister_trace_kvm_mmu_audit(kvm_mmu_audit, NULL);
-        tracepoint_synchronize_unregister();
-        mmu_audit = false;
-}
-
-static int mmu_audit_set(const char *val, const struct kernel_param *kp)
-{
-        int ret;
-        unsigned long enable;
-
-        ret = strict_strtoul(val, 10, &enable);
-        if (ret < 0)
-                return -EINVAL;
-
-        switch (enable) {
-        case 0:
-                mmu_audit_disable();
-                break;
-        case 1:
-                mmu_audit_enable();
-                break;
-        default:
-                return -EINVAL;
-        }
-
-        return 0;
-}
-
-static struct kernel_param_ops audit_param_ops = {
-        .set = mmu_audit_set,
-        .get = param_get_bool,
-};
-
-module_param_cb(mmu_audit, &audit_param_ops, &mmu_audit, 0644);
+#include "mmu_audit.c"
 #endif