[18/27] KVM: MMU: Propagate the right fault back to the guest after gva_to_gpa

Commit Message

Joerg Roedel Sept. 6, 2010, 3:55 p.m. UTC

None

Patch

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index e5eb57c..173834b 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -663,6 +663,7 @@  void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
 			    gfn_t gfn, void *data, int offset, int len,
 			    u32 *error);
+void kvm_propagate_fault(struct kvm_vcpu *vcpu);
 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
 
 int kvm_pic_set_irq(void *opaque, int irq, int level);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 38d482d..65b00f0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -337,6 +337,22 @@  void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
 	kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
 }
 
+void kvm_propagate_fault(struct kvm_vcpu *vcpu)
+{
+	unsigned long address;
+	u32 nested, error;
+
+	address = vcpu->arch.fault.address;
+	error   = vcpu->arch.fault.error_code;
+	nested  = error &  PFERR_NESTED_MASK;
+	error   = error & ~PFERR_NESTED_MASK;
+
+	if (mmu_is_nested(vcpu) && !nested)
+		vcpu->arch.nested_mmu.inject_page_fault(vcpu, address, error);
+	else
+		vcpu->arch.mmu.inject_page_fault(vcpu, address, error);
+}
+
 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
 {
 	vcpu->arch.nmi_pending = 1;
@@ -4130,8 +4146,7 @@  static void inject_emulated_exception(struct kvm_vcpu *vcpu)
 {
 	struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
 	if (ctxt->exception == PF_VECTOR)
-		kvm_inject_page_fault(vcpu, vcpu->arch.fault.address,
-					    vcpu->arch.fault.error_code);
+		kvm_propagate_fault(vcpu);
 	else if (ctxt->error_code_valid)
 		kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code);
 	else