x86_vcpu 0.5.8

x86 Virtual CPU implementation for the Arceos Hypervisor
Documentation 
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// Copyright 2025 The Axvisor Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#![no_std]
#![doc = include_str!("../README.md")]

#[cfg(any(feature = "vmx", feature = "svm"))]
#[macro_use]
extern crate log;
#[cfg(not(any(feature = "vmx", feature = "svm")))]
extern crate log;

extern crate alloc;

#[cfg(all(feature = "vmx", feature = "svm"))]
compile_error!("features `vmx` and `svm` are mutually exclusive");

#[cfg(test)]
mod test_utils;

pub(crate) mod msr;
#[cfg(feature = "vmx")]
#[macro_use]
pub(crate) mod regs;
mod ept;
#[cfg(not(feature = "vmx"))]
pub(crate) mod regs;
#[cfg(any(feature = "vmx", feature = "svm"))]
pub(crate) mod xstate;

cfg_if::cfg_if! {
    if #[cfg(feature = "vmx")] {
        mod vmx;
        use vmx as vendor;
        pub use vmx::{VmxExitInfo, VmxExitReason, VmxInterruptInfo, VmxIoExitInfo};

        pub use vendor::{
            VmxArchPerCpuState, VmxArchPerCpuState as X86ArchPerCpuState, VmxArchVCpu,
            VmxArchVCpu as X86ArchVCpu,
        };
    } else if #[cfg(feature = "svm")] {
        mod svm;
        use svm as vendor;

        pub use svm::{SvmExitCode, SvmExitInfo, SvmIntercept};
        pub use vendor::{
            SvmArchPerCpuState, SvmArchPerCpuState as X86ArchPerCpuState, SvmArchVCpu,
            SvmArchVCpu as X86ArchVCpu,
        };
    }
}

pub use ept::GuestPageWalkInfo;
pub use regs::GeneralRegisters;
#[cfg(any(feature = "vmx", feature = "svm"))]
pub use vendor::has_hardware_support;

#[cfg(not(any(feature = "vmx", feature = "svm")))]
pub fn has_hardware_support() -> bool {
    false
}

#[cfg(any(feature = "vmx", feature = "svm"))]
pub(crate) fn restore_host_interrupt_flag(host_rflags: u64) {
    if host_rflags & x86_64::registers::rflags::RFlags::INTERRUPT_FLAG.bits() != 0 {
        x86_64::instructions::interrupts::enable();
    } else {
        x86_64::instructions::interrupts::disable();
    }
}