diff options
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 1e215e8b9377..a26f13bd34e0 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2784,11 +2784,46 @@ static int init_kvm_softmmu(struct kvm_vcpu *vcpu) return r; } +static int init_kvm_nested_mmu(struct kvm_vcpu *vcpu) +{ + struct kvm_mmu *g_context = &vcpu->arch.nested_mmu; + + g_context->get_cr3 = get_cr3; + g_context->inject_page_fault = kvm_inject_page_fault; + + /* + * Note that arch.mmu.gva_to_gpa translates l2_gva to l1_gpa. The + * translation of l2_gpa to l1_gpa addresses is done using the + * arch.nested_mmu.gva_to_gpa function. Basically the gva_to_gpa + * functions between mmu and nested_mmu are swapped. + */ + if (!is_paging(vcpu)) { + g_context->root_level = 0; + g_context->gva_to_gpa = nonpaging_gva_to_gpa_nested; + } else if (is_long_mode(vcpu)) { + reset_rsvds_bits_mask(vcpu, g_context, PT64_ROOT_LEVEL); + g_context->root_level = PT64_ROOT_LEVEL; + g_context->gva_to_gpa = paging64_gva_to_gpa_nested; + } else if (is_pae(vcpu)) { + reset_rsvds_bits_mask(vcpu, g_context, PT32E_ROOT_LEVEL); + g_context->root_level = PT32E_ROOT_LEVEL; + g_context->gva_to_gpa = paging64_gva_to_gpa_nested; + } else { + reset_rsvds_bits_mask(vcpu, g_context, PT32_ROOT_LEVEL); + g_context->root_level = PT32_ROOT_LEVEL; + g_context->gva_to_gpa = paging32_gva_to_gpa_nested; + } + + return 0; +} + static int init_kvm_mmu(struct kvm_vcpu *vcpu) { vcpu->arch.update_pte.pfn = bad_pfn; - if (tdp_enabled) + if (mmu_is_nested(vcpu)) + return init_kvm_nested_mmu(vcpu); + else if (tdp_enabled) return init_kvm_tdp_mmu(vcpu); else return init_kvm_softmmu(vcpu); |
