- if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
- kvm_mmu_free_some_pages(vcpu);
- mmu_alloc_roots(vcpu);
- kvm_mmu_flush_tlb(vcpu);
- kvm_arch_ops->set_cr3(vcpu, vcpu->mmu.root_hpa);
-}
-
-static inline void set_pte_common(struct kvm_vcpu *vcpu,
- u64 *shadow_pte,
- gpa_t gaddr,
- int dirty,
- u64 access_bits,
- gfn_t gfn)
-{
- hpa_t paddr;
-
- *shadow_pte |= access_bits << PT_SHADOW_BITS_OFFSET;
- if (!dirty)
- access_bits &= ~PT_WRITABLE_MASK;
-
- paddr = gpa_to_hpa(vcpu, gaddr & PT64_BASE_ADDR_MASK);
-
- *shadow_pte |= access_bits;
-
- if (is_error_hpa(paddr)) {
- *shadow_pte |= gaddr;
- *shadow_pte |= PT_SHADOW_IO_MARK;
- *shadow_pte &= ~PT_PRESENT_MASK;
- return;
- }
-
- *shadow_pte |= paddr;
-
- if (access_bits & PT_WRITABLE_MASK) {
- struct kvm_mmu_page *shadow;
-
- shadow = kvm_mmu_lookup_page(vcpu, gfn);
- if (shadow) {
- pgprintk("%s: found shadow page for %lx, marking ro\n",
- __FUNCTION__, gfn);
- access_bits &= ~PT_WRITABLE_MASK;
- if (is_writeble_pte(*shadow_pte)) {
- *shadow_pte &= ~PT_WRITABLE_MASK;
- kvm_arch_ops->tlb_flush(vcpu);
- }
- }
- }
-
- if (access_bits & PT_WRITABLE_MASK)
- mark_page_dirty(vcpu->kvm, gaddr >> PAGE_SHIFT);
-
- page_header_update_slot(vcpu->kvm, shadow_pte, gaddr);
- rmap_add(vcpu, shadow_pte);