mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
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9ce6c3b75c
There are some code base and function which are purely KVM specific for now and we don't have those supports in mshv at the moment but we have plan for the future. We are doing a feature guard with KVM. For example, KVM has mp_state, cpu clock support, which we don't have for mshv. In order to build those code we are making the code base for KVM specific compilation. Signed-off-by: Muminul Islam <muislam@microsoft.com>
116 lines
2.9 KiB
Rust
116 lines
2.9 KiB
Rust
// Copyright © 2019 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
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//
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// Copyright © 2020, Microsoft Corporation
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//
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// Copyright 2018-2019 CrowdStrike, Inc.
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//
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//
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use crate::vm::Vm;
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#[cfg(target_arch = "x86_64")]
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use crate::x86_64::{CpuId, MsrList};
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#[cfg(all(feature = "kvm", target_arch = "x86_64"))]
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use kvm_ioctls::Cap;
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use std::sync::Arc;
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use thiserror::Error;
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#[derive(Error, Debug)]
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///
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///
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pub enum HypervisorError {
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///
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/// Vm creation failure
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///
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#[error("Failed to create Vm: {0}")]
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VmCreate(#[source] anyhow::Error),
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///
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/// Vm setup failure
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///
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#[error("Failed to setup Vm: {0}")]
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VmSetup(#[source] anyhow::Error),
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///
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/// API version error
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///
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#[error("Failed to get API Version: {0}")]
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GetApiVersion(#[source] anyhow::Error),
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///
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/// Vcpu mmap error
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///
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#[error("Failed to get Vcpu Mmap: {0}")]
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GetVcpuMmap(#[source] anyhow::Error),
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///
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/// Max Vcpu error
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///
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#[error("Failed to get number of max vcpus: {0}")]
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GetMaxVcpu(#[source] anyhow::Error),
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///
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/// CpuId error
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///
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#[error("Failed to get cpuid: {0}")]
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GetCpuId(#[source] anyhow::Error),
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///
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/// Failed to retrieve list of MSRs.
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///
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#[error("Failed to get the list of supported MSRs: {0}")]
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GetMsrList(#[source] anyhow::Error),
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///
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/// API version is not compatible
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///
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#[error("Incompatible API version")]
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IncompatibleApiVersion,
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}
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///
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/// Result type for returning from a function
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///
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pub type Result<T> = std::result::Result<T, HypervisorError>;
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///
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/// Trait to represent a Hypervisor
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///
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/// This crate provides a hypervisor-agnostic interfaces
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///
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pub trait Hypervisor: Send + Sync {
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///
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/// Create a Vm using the underlying hypervisor
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/// Return a hypervisor-agnostic Vm trait object
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///
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fn create_vm(&self) -> Result<Arc<dyn Vm>>;
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#[cfg(feature = "kvm")]
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///
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/// Returns the size of the memory mapping required to use the vcpu's structures
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///
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fn get_vcpu_mmap_size(&self) -> Result<usize>;
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#[cfg(feature = "kvm")]
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///
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/// Gets the recommended maximum number of VCPUs per VM.
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///
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fn get_max_vcpus(&self) -> Result<usize>;
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#[cfg(feature = "kvm")]
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///
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/// Gets the recommended number of VCPUs per VM.
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///
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fn get_nr_vcpus(&self) -> Result<usize>;
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#[cfg(all(feature = "kvm", target_arch = "x86_64"))]
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///
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/// Checks if a particular `Cap` is available.
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///
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fn check_capability(&self, c: Cap) -> bool;
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#[cfg(target_arch = "x86_64")]
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///
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/// Get the supported CpuID
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///
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fn get_cpuid(&self) -> Result<CpuId>;
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///
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/// Check particular extensions if any
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///
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fn check_required_extensions(&self) -> Result<()>;
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#[cfg(target_arch = "x86_64")]
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///
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/// Retrieve the list of MSRs supported by the hypervisor.
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///
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fn get_msr_list(&self) -> Result<MsrList>;
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}
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