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authorJoerg Roedel <joerg.roedel@amd.com>2010-09-10 17:31:02 +0200
committerAvi Kivity <avi@redhat.com>2010-10-24 10:52:45 +0200
commit5bd2edc341d11af175e759a546e4335ba3e0584f (patch)
treec376bdae4ee4a84f4be89ac16a030812ea63f06d /arch/x86/kvm/svm.c
parent2d48a985c7bbcd72b4e92e301ea96bf1252ffc61 (diff)
downloadlwn-5bd2edc341d11af175e759a546e4335ba3e0584f.tar.gz
lwn-5bd2edc341d11af175e759a546e4335ba3e0584f.zip
KVM: SVM: Implement MMU helper functions for Nested Nested Paging
This patch adds the helper functions which will be used in the mmu context for handling nested nested page faults. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
-rw-r--r--arch/x86/kvm/svm.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ca711cb27a19..9a9a4405b571 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -104,6 +104,8 @@ struct nested_state {
u32 intercept_exceptions;
u64 intercept;
+ /* Nested Paging related state */
+ u64 nested_cr3;
};
#define MSRPM_OFFSETS 16
@@ -1600,6 +1602,34 @@ 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)
+{
+ 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 = vcpu->arch.fault.error_code;
+ svm->vmcb->control.exit_info_2 = vcpu->arch.fault.address;
+
+ nested_svm_vmexit(svm);
+}
+
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
if (!(svm->vcpu.arch.efer & EFER_SVME)