Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 24/27] KVM: SVM: Implement MMU helper functions for Nested Nested Paging | Date | Mon, 6 Sep 2010 17:56:03 +0200 |
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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> --- arch/x86/kvm/svm.c | 32 ++++++++++++++++++++++++++++++++ 1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index a98ac52..6e72ba9 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 +1602,36 @@ 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) -- 1.7.0.4
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