[07/22] KVM: SVM: Implement MMU helper functions for Nested Nested Paging

Commit Message

Joerg Roedel April 27, 2010, 10:38 a.m. UTC

None

Patch

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 4aae4be..e31f601 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -92,6 +92,9 @@  struct nested_state {
 	u32 intercept_exceptions;
 	u64 intercept;
 
+	/* Nested Paging related state */
+	u64 nested_cr3;
+
 };
 
 #define MSRPM_OFFSETS	16
@@ -1490,6 +1493,36 @@  static int vmmcall_interception(struct vcpu_svm *svm)
 	return 1;
 }
 
+static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
+{
+	struct vcpu_svm *svm = to_svm(vcpu);
+
+	return svm->nested.nested_cr3;
+}
+
+static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
+				   unsigned long root)
+{
+	struct vcpu_svm *svm = to_svm(vcpu);
+
+	svm->vmcb->control.nested_cr3 = root;
+	force_new_asid(vcpu);
+}
+
+static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
+				       unsigned long addr,
+				       u32 error_code)
+{
+	struct vcpu_svm *svm = to_svm(vcpu);
+
+	svm->vmcb->control.exit_code = SVM_EXIT_NPF;
+	svm->vmcb->control.exit_code_hi = 0;
+	svm->vmcb->control.exit_info_1 = error_code;
+	svm->vmcb->control.exit_info_2 = addr;
+
+	nested_svm_vmexit(svm);
+}
+
 static int nested_svm_check_permissions(struct vcpu_svm *svm)
 {
 	if (!(svm->vcpu.arch.efer & EFER_SVME)