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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-09-10 19:31:02 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 12:52:45 +0400 |
| commit | 5bd2edc341d11af175e759a546e4335ba3e0584f (patch) | |
| tree | c376bdae4ee4a84f4be89ac16a030812ea63f06d /arch/x86 | |
| parent | 2d48a985c7bbcd72b4e92e301ea96bf1252ffc61 (diff) | |
| download | linux-5bd2edc341d11af175e759a546e4335ba3e0584f.tar.xz | |
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')
| -rw-r--r-- | arch/x86/kvm/svm.c | 30 |
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) |