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CHANGELOG.md

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v0.11.0

Added

  • [#178] Support for the AMD Security Encrypted Virtualization (SEV) through the following VM ioctls: encrypt_op, encrypt_op_sev, register_enc_memory_region and unregister_enc_memory_region.
  • [#184] DeviceFd now derives Debug.

v0.10.0

Changed

  • Now depends on kvm-bindings >=0.5.0 which replaced the v4.20 KVM bindings with the v5.13 ones.
  • Updated VcpuExit::Debug to return architecture specific information for the debug event.

v0.9.0

Added

  • Support for accessing and controlling the Time Stamp Counter on x86 platforms through the get_tsc_khz and set_tsc_khz functions.

Changed

  • Updated create_vm on aarch64 to create a VM fd from the KVM fd using the host's maximum IPA size.

v0.8.0

Added

  • Support for specifying VM type (an opaque platform and architecture specific constant) when creating a VM (KVM_CREATE_VM ioctl) via the Kvm::create_vm_with_type function.

Changed

  • Now depends on kvm-bindings >=0.4.0 to support use of a newer vmm-sys-utils dependency.

v0.7.0

Added

  • Support for the system API that returns the maximum allowed vCPU ID (KVM_CAP_MAX_VCPU_ID).
  • Support for KVM_MEMORY_ENCRYPT_OP.

Fixed

  • [#119]: Disallow invalid number of cpuid entries to be passed to get_supported_cpuid and get_emulated_cpuid.

Changed

  • [#123]: Updated create_vcpu to use u64 as the parameter for the number of vCPUs.

v0.6.0

Added

  • Support for the vcpu ioctls: KVM_SET_GUEST_DEBUG, KVM_KVMCLOCK_CTRL, and KVM_GET_REG_LIST.
  • Support for the vm ioctl KVM_GET_DEVICE_ATTR.
  • Support for the device ioctl KVM_HAS_DEVICE_ATTR.
  • Support for VcpuExit::Debug.
  • Support for enabling vcpu capabilities using Vcpu::enable_cap.
  • Support for checking Hyper-V (HypervSynic and HypervSynic2), MSI (MsiDevid), and IPA Size (ArmVmIPASize) capabilities. using kvm.check_extension.
  • Support for checking the VM capabilities via Vm::check_extension.
  • Create a VM with flexible IPA size using Kvm::create_vm_with_ipa_size.

Removed

  • Removed Kvm::new_with_fd_number. The same functionality is offered by the Kvm FromRawFd trait implementation.

Changed

  • The VM ioctl unregister_ioevent now correctly unregisters the events that correspond to the data match passed as a parameter.
  • The SystemEvent Vcpu Exit now also contains the relevant type and flags.
  • Updated get_dirty_log such that it does not assume the page size is 4K, but instead reads it using libc::sysconf.

v0.5.0

Added

  • Support for the vcpu ioctls KVM_GET/SET_VCPU_EVENTS and KVM_GET_DIRTY_LOG on aarch64.
  • Support for the vcpu ioctl KVM_IRQ_LINE.

v0.4.0

Added

  • Support for unregistering ioeventfds through KVM_IOEVENTFD.

Changed

  • Functions working with event FDs now require vmm_sys_util::eventfd::EventFd in their interface instead of RawFd.
  • Functions working with FAM structs kvm_msr_list and kvm_msrs, were changed to work with their respective safe counterparts MsrList and respectively Msrs.
  • Now exporting kvm_ioctls::Error type definition so that users of this crate can create their own wrapping errors without having to know the Error type used internally by this crate.
  • No longer exporting kvm_ioctls::Result. Users of this crate should not have to use kvm_ioctls::Result outside the crate.
  • kvm_ioctls::Error now works with errno::Error instead of io::Error.

Removed

  • CpuId safe wrapper over FAM struct kvm_cpuid2. The safe wrapper is now provided by the kvm_bindings crate starting with v0.2.0.
  • KVM_MAX_MSR_ENTRIES and MAX_KVM_CPUID_ENTRIES. Equivalent constants are provided by the kvm_bindings crate starting with v0.2.0.

v0.3.0

Added

  • Support for setting vcpu kvm_immediate_exit flag
  • Support for the vcpu ioctl KVM_GET_CPUID2
  • Support for the vcpu ioctl KVM_GET_MP_STATE
  • Support for the vcpu ioctl KVM_SET_MP_STATE
  • Support for the vcpu ioctl KVM_GET_VCPU_EVENTS
  • Support for the vcpu ioctl KVM_SET_VCPU_EVENTS
  • Support for the vcpu ioctl KVM_GET_DEBUGREGS
  • Support for the vcpu ioctl KVM_SET_DEBUGREGS
  • Support for the vcpu ioctl KVM_GET_XSAVE
  • Support for the vcpu ioctl KVM_SET_XSAVE
  • Support for the vcpu ioctl KVM_GET_XCRS
  • Support for the vcpu ioctl KVM_SET_XCRS
  • Support for the vm ioctl KVM_GET_IRQCHIP
  • Support for the vm ioctl KVM_SET_IRQCHIP
  • Support for the vm ioctl KVM_GET_CLOCK
  • Support for the vm ioctl KVM_SET_CLOCK
  • Support for the vm ioctl KVM_GET_PIT2
  • Support for the vm ioctl KVM_SET_PIT2
  • Support for the vcpu ioctl KVM_GET_ONE_REG

Changed

  • Function offering support for KVM_SET_MSRS also returns the number of MSR entries successfully written.

v0.2.0

Added

  • Add support for KVM_ENABLE_CAP.
  • Add support for KVM_SIGNAL_MSI.

Fixed

  • Fix bug in KvmRunWrapper. The memory for kvm_run struct was not unmapped after the KvmRunWrapper object got out of scope.
  • Return proper value when receiving the EOI KVM exit.
  • Mark set_user_memory_region as unsafe.

v0.1.0

First release of the kvm-ioctls crate.

The kvm-ioctls crate provides safe wrappers over the KVM API, a set of ioctls used for creating and configuring Virtual Machines (VMs) on Linux. The ioctls are accessible through four structures:

  • Kvm - wrappers over system ioctls
  • VmFd - wrappers over VM ioctls
  • VcpuFd - wrappers over vCPU ioctls
  • DeviceFd - wrappers over device ioctls

The kvm-ioctls can be used on x86_64 and aarch64. Right now the aarch64 support is considered experimental.