diff options
Diffstat (limited to 'arch/x86/kvm/vmx')
-rw-r--r-- | arch/x86/kvm/vmx/nested.c | 103 | ||||
-rw-r--r-- | arch/x86/kvm/vmx/vmcs12.h | 5 |
2 files changed, 61 insertions, 47 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 1032f068f0b9..5f9c1a200201 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -1397,7 +1397,7 @@ static int copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx) } if (unlikely(!(evmcs->hv_clean_fields & - HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC))) { + HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN))) { vmcs12->exception_bitmap = evmcs->exception_bitmap; } @@ -1437,7 +1437,7 @@ static int copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx) } if (unlikely(!(evmcs->hv_clean_fields & - HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1))) { + HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1))) { vmcs12->pin_based_vm_exec_control = evmcs->pin_based_vm_exec_control; vmcs12->vm_exit_controls = evmcs->vm_exit_controls; @@ -5226,14 +5226,16 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12; struct kvm_nested_state kvm_state = { .flags = 0, - .format = 0, + .format = KVM_STATE_NESTED_FORMAT_VMX, .size = sizeof(kvm_state), - .vmx.vmxon_pa = -1ull, - .vmx.vmcs_pa = -1ull, + .hdr.vmx.vmxon_pa = -1ull, + .hdr.vmx.vmcs12_pa = -1ull, }; + struct kvm_vmx_nested_state_data __user *user_vmx_nested_state = + &user_kvm_nested_state->data.vmx[0]; if (!vcpu) - return kvm_state.size + 2 * VMCS12_SIZE; + return kvm_state.size + sizeof(*user_vmx_nested_state); vmx = to_vmx(vcpu); vmcs12 = get_vmcs12(vcpu); @@ -5243,23 +5245,23 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu, if (nested_vmx_allowed(vcpu) && (vmx->nested.vmxon || vmx->nested.smm.vmxon)) { - kvm_state.vmx.vmxon_pa = vmx->nested.vmxon_ptr; - kvm_state.vmx.vmcs_pa = vmx->nested.current_vmptr; + kvm_state.hdr.vmx.vmxon_pa = vmx->nested.vmxon_ptr; + kvm_state.hdr.vmx.vmcs12_pa = vmx->nested.current_vmptr; if (vmx_has_valid_vmcs12(vcpu)) { - kvm_state.size += VMCS12_SIZE; + kvm_state.size += sizeof(user_vmx_nested_state->vmcs12); if (is_guest_mode(vcpu) && nested_cpu_has_shadow_vmcs(vmcs12) && vmcs12->vmcs_link_pointer != -1ull) - kvm_state.size += VMCS12_SIZE; + kvm_state.size += sizeof(user_vmx_nested_state->shadow_vmcs12); } if (vmx->nested.smm.vmxon) - kvm_state.vmx.smm.flags |= KVM_STATE_NESTED_SMM_VMXON; + kvm_state.hdr.vmx.smm.flags |= KVM_STATE_NESTED_SMM_VMXON; if (vmx->nested.smm.guest_mode) - kvm_state.vmx.smm.flags |= KVM_STATE_NESTED_SMM_GUEST_MODE; + kvm_state.hdr.vmx.smm.flags |= KVM_STATE_NESTED_SMM_GUEST_MODE; if (is_guest_mode(vcpu)) { kvm_state.flags |= KVM_STATE_NESTED_GUEST_MODE; @@ -5294,16 +5296,19 @@ static int vmx_get_nested_state(struct kvm_vcpu *vcpu, copy_shadow_to_vmcs12(vmx); } + BUILD_BUG_ON(sizeof(user_vmx_nested_state->vmcs12) < VMCS12_SIZE); + BUILD_BUG_ON(sizeof(user_vmx_nested_state->shadow_vmcs12) < VMCS12_SIZE); + /* * Copy over the full allocated size of vmcs12 rather than just the size * of the struct. */ - if (copy_to_user(user_kvm_nested_state->data, vmcs12, VMCS12_SIZE)) + if (copy_to_user(user_vmx_nested_state->vmcs12, vmcs12, VMCS12_SIZE)) return -EFAULT; if (nested_cpu_has_shadow_vmcs(vmcs12) && vmcs12->vmcs_link_pointer != -1ull) { - if (copy_to_user(user_kvm_nested_state->data + VMCS12_SIZE, + if (copy_to_user(user_vmx_nested_state->shadow_vmcs12, get_shadow_vmcs12(vcpu), VMCS12_SIZE)) return -EFAULT; } @@ -5331,33 +5336,35 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu, struct vcpu_vmx *vmx = to_vmx(vcpu); struct vmcs12 *vmcs12; u32 exit_qual; + struct kvm_vmx_nested_state_data __user *user_vmx_nested_state = + &user_kvm_nested_state->data.vmx[0]; int ret; - if (kvm_state->format != 0) + if (kvm_state->format != KVM_STATE_NESTED_FORMAT_VMX) return -EINVAL; - if (!nested_vmx_allowed(vcpu)) - return kvm_state->vmx.vmxon_pa == -1ull ? 0 : -EINVAL; - - if (kvm_state->vmx.vmxon_pa == -1ull) { - if (kvm_state->vmx.smm.flags) + if (kvm_state->hdr.vmx.vmxon_pa == -1ull) { + if (kvm_state->hdr.vmx.smm.flags) return -EINVAL; - if (kvm_state->vmx.vmcs_pa != -1ull) + if (kvm_state->hdr.vmx.vmcs12_pa != -1ull) return -EINVAL; - vmx_leave_nested(vcpu); - return 0; - } + if (kvm_state->flags & ~KVM_STATE_NESTED_EVMCS) + return -EINVAL; + } else { + if (!nested_vmx_allowed(vcpu)) + return -EINVAL; - if (!page_address_valid(vcpu, kvm_state->vmx.vmxon_pa)) - return -EINVAL; + if (!page_address_valid(vcpu, kvm_state->hdr.vmx.vmxon_pa)) + return -EINVAL; + } - if ((kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) && + if ((kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) && (kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE)) return -EINVAL; - if (kvm_state->vmx.smm.flags & + if (kvm_state->hdr.vmx.smm.flags & ~(KVM_STATE_NESTED_SMM_GUEST_MODE | KVM_STATE_NESTED_SMM_VMXON)) return -EINVAL; @@ -5366,21 +5373,25 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu, * nor can VMLAUNCH/VMRESUME be pending. Outside SMM, SMM flags * must be zero. */ - if (is_smm(vcpu) ? kvm_state->flags : kvm_state->vmx.smm.flags) + if (is_smm(vcpu) ? kvm_state->flags : kvm_state->hdr.vmx.smm.flags) return -EINVAL; - if ((kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) && - !(kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON)) + if ((kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) && + !(kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON)) return -EINVAL; vmx_leave_nested(vcpu); - if (kvm_state->vmx.vmxon_pa == -1ull) - return 0; + if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) { + if (!nested_vmx_allowed(vcpu)) + return -EINVAL; - if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) nested_enable_evmcs(vcpu, NULL); + } + + if (kvm_state->hdr.vmx.vmxon_pa == -1ull) + return 0; - vmx->nested.vmxon_ptr = kvm_state->vmx.vmxon_pa; + vmx->nested.vmxon_ptr = kvm_state->hdr.vmx.vmxon_pa; ret = enter_vmx_operation(vcpu); if (ret) return ret; @@ -5389,12 +5400,12 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu, if (kvm_state->size < sizeof(*kvm_state) + sizeof(*vmcs12)) return 0; - if (kvm_state->vmx.vmcs_pa != -1ull) { - if (kvm_state->vmx.vmcs_pa == kvm_state->vmx.vmxon_pa || - !page_address_valid(vcpu, kvm_state->vmx.vmcs_pa)) + if (kvm_state->hdr.vmx.vmcs12_pa != -1ull) { + if (kvm_state->hdr.vmx.vmcs12_pa == kvm_state->hdr.vmx.vmxon_pa || + !page_address_valid(vcpu, kvm_state->hdr.vmx.vmcs12_pa)) return -EINVAL; - set_current_vmptr(vmx, kvm_state->vmx.vmcs_pa); + set_current_vmptr(vmx, kvm_state->hdr.vmx.vmcs12_pa); } else if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) { /* * Sync eVMCS upon entry as we may not have @@ -5405,16 +5416,16 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu, return -EINVAL; } - if (kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON) { + if (kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON) { vmx->nested.smm.vmxon = true; vmx->nested.vmxon = false; - if (kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) + if (kvm_state->hdr.vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) vmx->nested.smm.guest_mode = true; } vmcs12 = get_vmcs12(vcpu); - if (copy_from_user(vmcs12, user_kvm_nested_state->data, sizeof(*vmcs12))) + if (copy_from_user(vmcs12, user_vmx_nested_state->vmcs12, sizeof(*vmcs12))) return -EFAULT; if (vmcs12->hdr.revision_id != VMCS12_REVISION) @@ -5431,12 +5442,14 @@ static int vmx_set_nested_state(struct kvm_vcpu *vcpu, vmcs12->vmcs_link_pointer != -1ull) { struct vmcs12 *shadow_vmcs12 = get_shadow_vmcs12(vcpu); - if (kvm_state->size < sizeof(*kvm_state) + VMCS12_SIZE + sizeof(*vmcs12)) + if (kvm_state->size < + sizeof(*kvm_state) + + sizeof(user_vmx_nested_state->vmcs12) + sizeof(*shadow_vmcs12)) goto error_guest_mode; if (copy_from_user(shadow_vmcs12, - user_kvm_nested_state->data + VMCS12_SIZE, - sizeof(*vmcs12))) { + user_vmx_nested_state->shadow_vmcs12, + sizeof(*shadow_vmcs12))) { ret = -EFAULT; goto error_guest_mode; } diff --git a/arch/x86/kvm/vmx/vmcs12.h b/arch/x86/kvm/vmx/vmcs12.h index 3a742428ad17..337718fc8a36 100644 --- a/arch/x86/kvm/vmx/vmcs12.h +++ b/arch/x86/kvm/vmx/vmcs12.h @@ -201,9 +201,10 @@ struct __packed vmcs12 { /* * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region * and any VMCS region. Although only sizeof(struct vmcs12) are used by the - * current implementation, 4K are reserved to avoid future complications. + * current implementation, 4K are reserved to avoid future complications and + * to preserve userspace ABI. */ -#define VMCS12_SIZE 0x1000 +#define VMCS12_SIZE KVM_STATE_NESTED_VMX_VMCS_SIZE /* * VMCS12_MAX_FIELD_INDEX is the highest index value used in any |