1 // Copyright 2023, The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //! Access to hypervisor capabilities via system properties set by the bootloader. 16 17 use anyhow::Result; 18 use platformproperties::hypervisorproperties; 19 20 /// Returns whether there is a hypervisor present that supports non-protected VMs. is_vm_supported() -> Result<bool>21pub fn is_vm_supported() -> Result<bool> { 22 Ok(hypervisorproperties::hypervisor_vm_supported()?.unwrap_or(false)) 23 } 24 25 /// Returns whether there is a hypervisor present that supports protected VMs. is_protected_vm_supported() -> Result<bool>26pub fn is_protected_vm_supported() -> Result<bool> { 27 Ok(hypervisorproperties::hypervisor_protected_vm_supported()?.unwrap_or(false)) 28 } 29 30 /// Returns whether there is a hypervisor present that supports any sort of VM, either protected 31 /// or non-protected. is_any_vm_supported() -> Result<bool>32pub fn is_any_vm_supported() -> Result<bool> { 33 is_vm_supported().and_then(|ok| if ok { Ok(true) } else { is_protected_vm_supported() }) 34 } 35 36 /// Returns the version of the hypervisor, if there is one. version() -> Result<Option<String>>37pub fn version() -> Result<Option<String>> { 38 Ok(hypervisorproperties::hypervisor_version()?) 39 } 40 41 /// Returns if the hypervisor is pKVM is_pkvm() -> Result<bool>42pub fn is_pkvm() -> Result<bool> { 43 Ok(version()?.unwrap_or_default().starts_with("kvm") && is_protected_vm_supported()?) 44 } 45