Trait hypervisor::x86_64::VcpuX86_64

pub trait VcpuX86_64: Vcpu {
    // Required methods
    fn set_interrupt_window_requested(&self, requested: bool);
    fn ready_for_interrupt(&self) -> bool;
    fn interrupt(&self, irq: u32) -> Result<()>;
    fn inject_nmi(&self) -> Result<()>;
    fn get_regs(&self) -> Result<Regs>;
    fn set_regs(&self, regs: &Regs) -> Result<()>;
    fn get_sregs(&self) -> Result<Sregs>;
    fn set_sregs(&self, sregs: &Sregs) -> Result<()>;
    fn get_fpu(&self) -> Result<Fpu>;
    fn set_fpu(&self, fpu: &Fpu) -> Result<()>;
    fn get_debugregs(&self) -> Result<DebugRegs>;
    fn set_debugregs(&self, debugregs: &DebugRegs) -> Result<()>;
    fn get_xcrs(&self) -> Result<BTreeMap<u32, u64>>;
    fn set_xcr(&self, xcr: u32, value: u64) -> Result<()>;
    fn get_xsave(&self) -> Result<Xsave>;
    fn set_xsave(&self, xsave: &Xsave) -> Result<()>;
    fn get_interrupt_state(&self) -> Result<Value>;
    fn set_interrupt_state(&self, data: Value) -> Result<()>;
    fn get_msr(&self, msr_index: u32) -> Result<u64>;
    fn get_all_msrs(&self) -> Result<BTreeMap<u32, u64>>;
    fn set_msr(&self, msr_index: u32, value: u64) -> Result<()>;
    fn set_cpuid(&self, cpuid: &CpuId) -> Result<()>;
    fn get_hyperv_cpuid(&self) -> Result<CpuId>;
    fn set_guest_debug(
        &self,
        addrs: &[GuestAddress],
        enable_singlestep: bool
    ) -> Result<()>;
    fn handle_cpuid(&mut self, entry: &CpuIdEntry) -> Result<()>;
    fn restore_timekeeping(
        &self,
        host_tsc_reference_moment: u64,
        tsc_offset: u64
    ) -> Result<()>;

    // Provided methods
    fn get_tsc_offset(&self) -> Result<u64> { ... }
    fn set_tsc_offset(&self, offset: u64) -> Result<()> { ... }
    fn set_tsc_value(&self, value: u64) -> Result<()> { ... }
    fn snapshot(&self) -> Result<VcpuSnapshot> { ... }
    fn restore(
        &mut self,
        snapshot: &VcpuSnapshot,
        host_tsc_reference_moment: u64
    ) -> Result<()> { ... }
}

A wrapper around creating and using a VCPU on x86_64.

Required Methods

fn set_interrupt_window_requested(&self, requested: bool)

Sets or clears the flag that requests the VCPU to exit when it becomes possible to inject interrupts into the guest.

fn ready_for_interrupt(&self) -> bool

Checks if we can inject an interrupt into the VCPU.

fn interrupt(&self, irq: u32) -> Result<()>

Injects interrupt vector irq into the VCPU.

fn inject_nmi(&self) -> Result<()>

Injects a non-maskable interrupt into the VCPU.

fn get_regs(&self) -> Result<Regs>

Gets the VCPU general purpose registers.

fn set_regs(&self, regs: &Regs) -> Result<()>

Sets the VCPU general purpose registers.

fn get_sregs(&self) -> Result<Sregs>

Gets the VCPU special registers.

fn set_sregs(&self, sregs: &Sregs) -> Result<()>

Sets the VCPU special registers.

fn get_fpu(&self) -> Result<Fpu>

Gets the VCPU FPU registers.

fn set_fpu(&self, fpu: &Fpu) -> Result<()>

Sets the VCPU FPU registers.

fn get_debugregs(&self) -> Result<DebugRegs>

Gets the VCPU debug registers.

fn set_debugregs(&self, debugregs: &DebugRegs) -> Result<()>

Sets the VCPU debug registers.

fn get_xcrs(&self) -> Result<BTreeMap<u32, u64>>

Gets the VCPU extended control registers.

fn set_xcr(&self, xcr: u32, value: u64) -> Result<()>

Sets a VCPU extended control register.

fn get_xsave(&self) -> Result<Xsave>

Gets the VCPU x87 FPU, MMX, XMM, YMM and MXCSR registers.

fn set_xsave(&self, xsave: &Xsave) -> Result<()>

Sets the VCPU x87 FPU, MMX, XMM, YMM and MXCSR registers.

fn get_interrupt_state(&self) -> Result<Value>

Gets interrupt state (hypervisor specific) for this VCPU that must be saved/restored for snapshotting.

fn set_interrupt_state(&self, data: Value) -> Result<()>

Sets interrupt state (hypervisor specific) for this VCPU. Only used for snapshotting.

fn get_msr(&self, msr_index: u32) -> Result<u64>

Gets a single model-specific register’s value.

fn get_all_msrs(&self) -> Result<BTreeMap<u32, u64>>

Gets the model-specific registers. Returns all the MSRs for the VCPU.

fn set_msr(&self, msr_index: u32, value: u64) -> Result<()>

Sets a single model-specific register’s value.

fn set_cpuid(&self, cpuid: &CpuId) -> Result<()>

Sets up the data returned by the CPUID instruction.

fn get_hyperv_cpuid(&self) -> Result<CpuId>

Gets the system emulated hyper-v CPUID values.

fn set_guest_debug( &self, addrs: &[GuestAddress], enable_singlestep: bool ) -> Result<()>

Sets up debug registers and configure vcpu for handling guest debug events.

fn handle_cpuid(&mut self, entry: &CpuIdEntry) -> Result<()>

This function should be called after Vcpu::run returns VcpuExit::Cpuid, and entry should represent the result of emulating the CPUID instruction. The handle_cpuid function will then set the appropriate registers on the vcpu.

fn restore_timekeeping( &self, host_tsc_reference_moment: u64, tsc_offset: u64 ) -> Result<()>

Some hypervisors require special handling to restore timekeeping when a snapshot is restored. They are provided with a host TSC reference moment, guaranteed to be the same across all Vcpus, and the Vcpu’s TSC offset at the moment it was snapshotted.

Provided Methods

fn get_tsc_offset(&self) -> Result<u64>

Gets the guest->host TSC offset.

The default implementation uses VcpuX86_64::get_msr() to read the guest TSC.

fn set_tsc_offset(&self, offset: u64) -> Result<()>

Sets the guest->host TSC offset.

The default implementation uses VcpuX86_64::set_tsc_value() to set the TSC value.

It sets TSC_OFFSET (VMCS / CB field) by setting the TSC MSR to the current host TSC value plus the desired offset. We rely on the fact that hypervisors determine the value of TSC_OFFSET by computing TSC_OFFSET = new_tsc_value

• _rdtsc() = _rdtsc() + offset - _rdtsc() ~= offset. Note that the ~= is important: this is an approximate operation, because the two _rdtsc() calls are separated by at least a few ticks.

Note: TSC_OFFSET, host TSC, guest TSC, and TSC MSR are all different concepts.

• When a guest executes rdtsc, the value (guest TSC) returned is host_tsc * TSC_MULTIPLIER + TSC_OFFSET + TSC_ADJUST.
• The TSC MSR is a special MSR that when written to by the host, will cause TSC_OFFSET to be set accordingly by the hypervisor.
• When the guest writes to TSC MSR, it actually changes the TSC_ADJUST MSR for the guest. Generally this is only happens if the guest is trying to re-zero or synchronize TSCs.

fn set_tsc_value(&self, value: u64) -> Result<()>

Sets the guest TSC exactly to the provided value.

The default implementation sets the guest’s TSC by writing the value to the MSR directly.

See VcpuX86_64::set_tsc_offset() for an explanation of how this value is actually read by the guest after being set.

fn snapshot(&self) -> Result<VcpuSnapshot>

Snapshot vCPU state

fn restore( &mut self, snapshot: &VcpuSnapshot, host_tsc_reference_moment: u64 ) -> Result<()>

Implementations

impl dyn VcpuX86_64

pub fn is<__T: VcpuX86_64>(&self) -> bool

Returns true if the trait object wraps an object of type __T.

pub fn downcast<__T: VcpuX86_64>(self: Box<Self>) -> Result<Box<__T>, Box<Self>>

Returns a boxed object from a boxed trait object if the underlying object is of type __T. Returns the original boxed trait if it isn’t.

pub fn downcast_rc<__T: VcpuX86_64>(self: Rc<Self>) -> Result<Rc<__T>, Rc<Self>>

Returns an Rc-ed object from an Rc-ed trait object if the underlying object is of type __T. Returns the original Rc-ed trait if it isn’t.

pub fn downcast_ref<__T: VcpuX86_64>(&self) -> Option<&__T>

Returns a reference to the object within the trait object if it is of type __T, or None if it isn’t.

pub fn downcast_mut<__T: VcpuX86_64>(&mut self) -> Option<&mut __T>

Returns a mutable reference to the object within the trait object if it is of type __T, or None if it isn’t.

Implementors

impl VcpuX86_64 for KvmVcpu