@@ -298,6 +298,16 @@ struct kvm_vcpu_arch {
struct kvm_mmu mmu;
/*
+ * Paging state of an L2 guest (used for nested npt)
+ *
+ * This context will save all necessary information to walk page tables
+ * of the an L2 guest. This context is only initialized for page table
+ * walking and not for faulting since we never handle l2 page faults on
+ * the host.
+ */
+ struct kvm_mmu nested_mmu;
+
+ /*
* Pointer to the mmu context currently used for
* gva_to_gpa translations.
*/
@@ -2466,6 +2466,14 @@ static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr,
return vaddr;
}
+static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr,
+ u32 access, u32 *error)
+{
+ if (error)
+ *error = 0;
+ return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, error);
+}
+
static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
u32 error_code)
{
@@ -272,6 +272,16 @@ static int FNAME(walk_addr)(struct guest_walker *walker,
write_fault, user_fault, fetch_fault);
}
+static int FNAME(walk_addr_nested)(struct guest_walker *walker,
+ struct kvm_vcpu *vcpu, gva_t addr,
+ int write_fault, int user_fault,
+ int fetch_fault)
+{
+ return FNAME(walk_addr_generic)(walker, vcpu, &vcpu->arch.nested_mmu,
+ addr, write_fault, user_fault,
+ fetch_fault);
+}
+
static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
u64 *spte, const void *pte)
{
@@ -656,6 +666,27 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
return gpa;
}
+static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
+ u32 access, u32 *error)
+{
+ struct guest_walker walker;
+ gpa_t gpa = UNMAPPED_GVA;
+ int r;
+
+ r = FNAME(walk_addr_nested)(&walker, vcpu, vaddr,
+ access & PFERR_WRITE_MASK,
+ access & PFERR_USER_MASK,
+ access & PFERR_FETCH_MASK);
+
+ if (r) {
+ gpa = gfn_to_gpa(walker.gfn);
+ gpa |= vaddr & ~PAGE_MASK;
+ } else if (error)
+ *error = walker.error_code;
+
+ return gpa;
+}
+
static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *sp)
{
@@ -50,6 +50,11 @@ static inline int is_long_mode(struct kvm_vcpu *vcpu)
#endif
}
+static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
+}
+
static inline int is_pae(struct kvm_vcpu *vcpu)
{
return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);