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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>
This commit is contained in:
Joerg Roedel 2010-09-10 17:31:02 +02:00 committed by Avi Kivity
parent 2d48a985c7
commit 5bd2edc341
1 changed files with 30 additions and 0 deletions
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30
arch/x86/kvm/svm.c
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@ -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)