diff options
Diffstat (limited to 'arch/x86/kvm/paging_tmpl.h')
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index e644d81979b..d2064015421 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -82,6 +82,7 @@ struct shadow_walker { int *ptwrite; pfn_t pfn; u64 *sptep; + gpa_t pte_gpa; }; static gfn_t gpte_to_gfn(pt_element_t gpte) @@ -222,7 +223,7 @@ walk: if (ret) goto walk; pte |= PT_DIRTY_MASK; - kvm_mmu_pte_write(vcpu, pte_gpa, (u8 *)&pte, sizeof(pte)); + kvm_mmu_pte_write(vcpu, pte_gpa, (u8 *)&pte, sizeof(pte), 0); walker->ptes[walker->level - 1] = pte; } @@ -468,8 +469,15 @@ static int FNAME(shadow_invlpg_entry)(struct kvm_shadow_walk *_sw, struct kvm_vcpu *vcpu, u64 addr, u64 *sptep, int level) { + struct shadow_walker *sw = + container_of(_sw, struct shadow_walker, walker); if (level == PT_PAGE_TABLE_LEVEL) { + struct kvm_mmu_page *sp = page_header(__pa(sptep)); + + sw->pte_gpa = (sp->gfn << PAGE_SHIFT); + sw->pte_gpa += (sptep - sp->spt) * sizeof(pt_element_t); + if (is_shadow_present_pte(*sptep)) rmap_remove(vcpu->kvm, sptep); set_shadow_pte(sptep, shadow_trap_nonpresent_pte); @@ -482,11 +490,26 @@ static int FNAME(shadow_invlpg_entry)(struct kvm_shadow_walk *_sw, static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva) { + pt_element_t gpte; struct shadow_walker walker = { .walker = { .entry = FNAME(shadow_invlpg_entry), }, + .pte_gpa = -1, }; + spin_lock(&vcpu->kvm->mmu_lock); walk_shadow(&walker.walker, vcpu, gva); + spin_unlock(&vcpu->kvm->mmu_lock); + if (walker.pte_gpa == -1) + return; + if (kvm_read_guest_atomic(vcpu->kvm, walker.pte_gpa, &gpte, + sizeof(pt_element_t))) + return; + if (is_present_pte(gpte) && (gpte & PT_ACCESSED_MASK)) { + if (mmu_topup_memory_caches(vcpu)) + return; + kvm_mmu_pte_write(vcpu, walker.pte_gpa, (const u8 *)&gpte, + sizeof(pt_element_t), 0); + } } static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr) |