diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 111 |
1 files changed, 62 insertions, 49 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 71df7411959f..bca60665d55d 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10507,6 +10507,65 @@ static int check_vmentry_postreqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, return 0; } +static int enter_vmx_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + struct vmcs12 *vmcs12 = get_vmcs12(vcpu); + struct loaded_vmcs *vmcs02; + int cpu; + u32 msr_entry_idx; + u32 exit_qual; + + vmcs02 = nested_get_current_vmcs02(vmx); + if (!vmcs02) + return -ENOMEM; + + enter_guest_mode(vcpu); + + if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) + vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); + + cpu = get_cpu(); + vmx->loaded_vmcs = vmcs02; + vmx_vcpu_put(vcpu); + vmx_vcpu_load(vcpu, cpu); + vcpu->cpu = cpu; + put_cpu(); + + vmx_segment_cache_clear(vmx); + + if (prepare_vmcs02(vcpu, vmcs12, from_vmentry, &exit_qual)) { + leave_guest_mode(vcpu); + vmx_load_vmcs01(vcpu); + nested_vmx_entry_failure(vcpu, vmcs12, + EXIT_REASON_INVALID_STATE, exit_qual); + return 1; + } + + nested_get_vmcs12_pages(vcpu, vmcs12); + + msr_entry_idx = nested_vmx_load_msr(vcpu, + vmcs12->vm_entry_msr_load_addr, + vmcs12->vm_entry_msr_load_count); + if (msr_entry_idx) { + leave_guest_mode(vcpu); + vmx_load_vmcs01(vcpu); + nested_vmx_entry_failure(vcpu, vmcs12, + EXIT_REASON_MSR_LOAD_FAIL, msr_entry_idx); + return 1; + } + + vmcs12->launch_state = 1; + + /* + * Note no nested_vmx_succeed or nested_vmx_fail here. At this point + * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet + * returned as far as L1 is concerned. It will only return (and set + * the success flag) when L2 exits (see nested_vmx_vmexit()). + */ + return 0; +} + /* * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1 * for running an L2 nested guest. @@ -10515,9 +10574,6 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) { struct vmcs12 *vmcs12; struct vcpu_vmx *vmx = to_vmx(vcpu); - int cpu; - struct loaded_vmcs *vmcs02; - u32 msr_entry_idx; u32 exit_qual; int ret; @@ -10576,58 +10632,15 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) * the nested entry. */ - vmcs02 = nested_get_current_vmcs02(vmx); - if (!vmcs02) - return -ENOMEM; - - enter_guest_mode(vcpu); - - if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) - vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); - - cpu = get_cpu(); - vmx->loaded_vmcs = vmcs02; - vmx_vcpu_put(vcpu); - vmx_vcpu_load(vcpu, cpu); - vcpu->cpu = cpu; - put_cpu(); - - vmx_segment_cache_clear(vmx); - - if (prepare_vmcs02(vcpu, vmcs12, true, &exit_qual)) { - leave_guest_mode(vcpu); - vmx_load_vmcs01(vcpu); - nested_vmx_entry_failure(vcpu, vmcs12, - EXIT_REASON_INVALID_STATE, exit_qual); - return 1; - } - - nested_get_vmcs12_pages(vcpu, vmcs12); - - msr_entry_idx = nested_vmx_load_msr(vcpu, - vmcs12->vm_entry_msr_load_addr, - vmcs12->vm_entry_msr_load_count); - if (msr_entry_idx) { - leave_guest_mode(vcpu); - vmx_load_vmcs01(vcpu); - nested_vmx_entry_failure(vcpu, vmcs12, - EXIT_REASON_MSR_LOAD_FAIL, msr_entry_idx); - return 1; - } - - vmcs12->launch_state = 1; + ret = enter_vmx_non_root_mode(vcpu, true); + if (ret) + return ret; if (vmcs12->guest_activity_state == GUEST_ACTIVITY_HLT) return kvm_vcpu_halt(vcpu); vmx->nested.nested_run_pending = 1; - /* - * Note no nested_vmx_succeed or nested_vmx_fail here. At this point - * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet - * returned as far as L1 is concerned. It will only return (and set - * the success flag) when L2 exits (see nested_vmx_vmexit()). - */ return 1; out: |