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b212f2823d
cloud-hypervisor/vmm/src/device_manager.rs
Rob Bradford b212f2823d vmm: Deprecate mergeable option from virtio-pmem 
KSM would never merge the file backed pages so this option has no
effect.

See: #3968

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2022-04-12 07:12:25 -07:00

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// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE-BSD-3-Clause file.
//
// Copyright © 2019 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
//
use crate::config::{
ConsoleOutputMode, DeviceConfig, DiskConfig, FsConfig, NetConfig, PmemConfig, UserDeviceConfig,
VdpaConfig, VhostMode, VmConfig, VsockConfig,
};
use crate::device_tree::{DeviceNode, DeviceTree};
#[cfg(feature = "kvm")]
use crate::interrupt::kvm::KvmMsiInterruptManager as MsiInterruptManager;
#[cfg(feature = "mshv")]
use crate::interrupt::mshv::MshvMsiInterruptManager as MsiInterruptManager;
use crate::interrupt::LegacyUserspaceInterruptManager;
use crate::memory_manager::MEMORY_MANAGER_ACPI_SIZE;
use crate::memory_manager::{Error as MemoryManagerError, MemoryManager};
use crate::pci_segment::PciSegment;
use crate::seccomp_filters::{get_seccomp_filter, Thread};
use crate::serial_manager::{Error as SerialManagerError, SerialManager};
use crate::sigwinch_listener::start_sigwinch_listener;
#[cfg(target_arch = "aarch64")]
use crate::GuestMemoryMmap;
use crate::GuestRegionMmap;
use crate::PciDeviceInfo;
use crate::{device_node, DEVICE_MANAGER_SNAPSHOT_ID};
use acpi_tables::{aml, aml::Aml};
use anyhow::anyhow;
#[cfg(target_arch = "aarch64")]
use arch::aarch64::gic::gicv3_its::kvm::KvmGicV3Its;
use arch::layout;
#[cfg(target_arch = "x86_64")]
use arch::layout::{APIC_START, IOAPIC_SIZE, IOAPIC_START};
use arch::NumaNodes;
#[cfg(target_arch = "aarch64")]
use arch::{DeviceType, MmioDeviceInfo};
use block_util::{
async_io::DiskFile, block_io_uring_is_supported, detect_image_type,
fixed_vhd_async::FixedVhdDiskAsync, fixed_vhd_sync::FixedVhdDiskSync, qcow_sync::QcowDiskSync,
raw_async::RawFileDisk, raw_sync::RawFileDiskSync, vhdx_sync::VhdxDiskSync, ImageType,
};
#[cfg(target_arch = "aarch64")]
use devices::gic;
#[cfg(target_arch = "x86_64")]
use devices::ioapic;
#[cfg(target_arch = "aarch64")]
use devices::legacy::Pl011;
#[cfg(target_arch = "x86_64")]
use devices::legacy::Serial;
use devices::{
interrupt_controller, interrupt_controller::InterruptController, AcpiNotificationFlags,
};
#[cfg(feature = "kvm")]
use hypervisor::kvm_ioctls::*;
use hypervisor::DeviceFd;
#[cfg(feature = "mshv")]
use hypervisor::IoEventAddress;
use libc::{
cfmakeraw, isatty, tcgetattr, tcsetattr, termios, MAP_NORESERVE, MAP_PRIVATE, MAP_SHARED,
O_TMPFILE, PROT_READ, PROT_WRITE, TCSANOW,
};
#[cfg(target_arch = "x86_64")]
use pci::PciConfigIo;
use pci::{
DeviceRelocation, PciBarRegionType, PciBdf, PciDevice, VfioPciDevice, VfioUserDmaMapping,
VfioUserPciDevice, VfioUserPciDeviceError,
};
use seccompiler::SeccompAction;
use std::collections::HashMap;
use std::convert::TryInto;
use std::fs::{read_link, File, OpenOptions};
use std::io::{self, stdout, Seek, SeekFrom};
use std::mem::zeroed;
use std::num::Wrapping;
use std::os::unix::fs::OpenOptionsExt;
use std::os::unix::io::{AsRawFd, FromRawFd, RawFd};
use std::path::PathBuf;
use std::result;
use std::sync::{Arc, Mutex};
use vfio_ioctls::{VfioContainer, VfioDevice};
use virtio_devices::transport::VirtioPciDevice;
use virtio_devices::transport::VirtioTransport;
use virtio_devices::vhost_user::VhostUserConfig;
use virtio_devices::{AccessPlatformMapping, VdpaDmaMapping, VirtioMemMappingSource};
use virtio_devices::{Endpoint, IommuMapping};
use virtio_devices::{VirtioSharedMemory, VirtioSharedMemoryList};
use vm_allocator::{AddressAllocator, SystemAllocator};
use vm_device::dma_mapping::vfio::VfioDmaMapping;
use vm_device::dma_mapping::ExternalDmaMapping;
use vm_device::interrupt::{
InterruptIndex, InterruptManager, LegacyIrqGroupConfig, MsiIrqGroupConfig,
};
use vm_device::{Bus, BusDevice, Resource};
use vm_memory::guest_memory::FileOffset;
#[cfg(target_arch = "aarch64")]
use vm_memory::GuestMemoryAtomic;
use vm_memory::GuestMemoryRegion;
use vm_memory::{Address, GuestAddress, GuestUsize, MmapRegion};
#[cfg(target_arch = "x86_64")]
use vm_memory::{GuestAddressSpace, GuestMemory};
use vm_migration::{
protocol::MemoryRangeTable, Migratable, MigratableError, Pausable, Snapshot,
SnapshotDataSection, Snapshottable, Transportable,
};
use vm_virtio::AccessPlatform;
use vm_virtio::VirtioDeviceType;
use vmm_sys_util::eventfd::EventFd;
#[cfg(target_arch = "aarch64")]
const MMIO_LEN: u64 = 0x1000;
const VFIO_DEVICE_NAME_PREFIX: &str = "_vfio";
const VFIO_USER_DEVICE_NAME_PREFIX: &str = "_vfio_user";
#[cfg(target_arch = "x86_64")]
const IOAPIC_DEVICE_NAME: &str = "_ioapic";
const SERIAL_DEVICE_NAME_PREFIX: &str = "_serial";
#[cfg(target_arch = "aarch64")]
const GPIO_DEVICE_NAME_PREFIX: &str = "_gpio";
const CONSOLE_DEVICE_NAME: &str = "_console";
const DISK_DEVICE_NAME_PREFIX: &str = "_disk";
const FS_DEVICE_NAME_PREFIX: &str = "_fs";
const BALLOON_DEVICE_NAME: &str = "_balloon";
const NET_DEVICE_NAME_PREFIX: &str = "_net";
const PMEM_DEVICE_NAME_PREFIX: &str = "_pmem";
const RNG_DEVICE_NAME: &str = "_rng";
const VDPA_DEVICE_NAME_PREFIX: &str = "_vdpa";
const VSOCK_DEVICE_NAME_PREFIX: &str = "_vsock";
const WATCHDOG_DEVICE_NAME: &str = "_watchdog";
const IOMMU_DEVICE_NAME: &str = "_iommu";
const VIRTIO_PCI_DEVICE_NAME_PREFIX: &str = "_virtio-pci";
/// Errors associated with device manager
#[derive(Debug)]
pub enum DeviceManagerError {
/// Cannot create EventFd.
EventFd(io::Error),
/// Cannot open disk path
Disk(io::Error),
/// Cannot create vhost-user-net device
CreateVhostUserNet(virtio_devices::vhost_user::Error),
/// Cannot create virtio-blk device
CreateVirtioBlock(io::Error),
/// Cannot create virtio-net device
CreateVirtioNet(virtio_devices::net::Error),
/// Cannot create virtio-console device
CreateVirtioConsole(io::Error),
/// Cannot create virtio-rng device
CreateVirtioRng(io::Error),
/// Cannot create virtio-fs device
CreateVirtioFs(virtio_devices::vhost_user::Error),
/// Virtio-fs device was created without a socket.
NoVirtioFsSock,
/// Cannot create vhost-user-blk device
CreateVhostUserBlk(virtio_devices::vhost_user::Error),
/// Cannot create virtio-pmem device
CreateVirtioPmem(io::Error),
/// Cannot create vDPA device
CreateVdpa(virtio_devices::vdpa::Error),
/// Cannot create virtio-vsock device
CreateVirtioVsock(io::Error),
/// Failed to convert Path to &str for the vDPA device.
CreateVdpaConvertPath,
/// Failed to convert Path to &str for the virtio-vsock device.
CreateVsockConvertPath,
/// Cannot create virtio-vsock backend
CreateVsockBackend(virtio_devices::vsock::VsockUnixError),
/// Cannot create virtio-iommu device
CreateVirtioIommu(io::Error),
/// Cannot create virtio-balloon device
CreateVirtioBalloon(io::Error),
/// Cannot create virtio-watchdog device
CreateVirtioWatchdog(io::Error),
/// Failed to parse disk image format
DetectImageType(io::Error),
/// Cannot open qcow disk path
QcowDeviceCreate(qcow::Error),
/// Cannot create serial manager
CreateSerialManager(SerialManagerError),
/// Cannot spawn the serial manager thread
SpawnSerialManager(SerialManagerError),
/// Cannot open tap interface
OpenTap(net_util::TapError),
/// Cannot allocate IRQ.
AllocateIrq,
/// Cannot configure the IRQ.
Irq(vmm_sys_util::errno::Error),
/// Cannot allocate PCI BARs
AllocateBars(pci::PciDeviceError),
/// Could not free the BARs associated with a PCI device.
FreePciBars(pci::PciDeviceError),
/// Cannot register ioevent.
RegisterIoevent(anyhow::Error),
/// Cannot unregister ioevent.
UnRegisterIoevent(anyhow::Error),
/// Cannot create virtio device
VirtioDevice(vmm_sys_util::errno::Error),
/// Cannot add PCI device
AddPciDevice(pci::PciRootError),
/// Cannot open persistent memory file
PmemFileOpen(io::Error),
/// Cannot set persistent memory file size
PmemFileSetLen(io::Error),
/// Cannot find a memory range for persistent memory
PmemRangeAllocation,
/// Cannot find a memory range for virtio-fs
FsRangeAllocation,
/// Error creating serial output file
SerialOutputFileOpen(io::Error),
/// Error creating console output file
ConsoleOutputFileOpen(io::Error),
/// Error creating serial pty
SerialPtyOpen(io::Error),
/// Error creating console pty
ConsolePtyOpen(io::Error),
/// Error setting pty raw mode
SetPtyRaw(vmm_sys_util::errno::Error),
/// Error getting pty peer
GetPtyPeer(vmm_sys_util::errno::Error),
/// Cannot create a VFIO device
VfioCreate(vfio_ioctls::VfioError),
/// Cannot create a VFIO PCI device
VfioPciCreate(pci::VfioPciError),
/// Failed to map VFIO MMIO region.
VfioMapRegion(pci::VfioPciError),
/// Failed to DMA map VFIO device.
VfioDmaMap(vfio_ioctls::VfioError),
/// Failed to DMA unmap VFIO device.
VfioDmaUnmap(pci::VfioPciError),
/// Failed to create the passthrough device.
CreatePassthroughDevice(anyhow::Error),
/// Failed to memory map.
Mmap(io::Error),
/// Cannot add legacy device to Bus.
BusError(vm_device::BusError),
/// Failed to allocate IO port
AllocateIoPort,
/// Failed to allocate MMIO address
AllocateMmioAddress,
/// Failed to make hotplug notification
HotPlugNotification(io::Error),
/// Error from a memory manager operation
MemoryManager(MemoryManagerError),
/// Failed to create new interrupt source group.
CreateInterruptGroup(io::Error),
/// Failed to update interrupt source group.
UpdateInterruptGroup(io::Error),
/// Failed to create interrupt controller.
CreateInterruptController(interrupt_controller::Error),
/// Failed to create a new MmapRegion instance.
NewMmapRegion(vm_memory::mmap::MmapRegionError),
/// Failed to clone a File.
CloneFile(io::Error),
/// Failed to create socket file
CreateSocketFile(io::Error),
/// Failed to spawn the network backend
SpawnNetBackend(io::Error),
/// Failed to spawn the block backend
SpawnBlockBackend(io::Error),
/// Missing PCI bus.
NoPciBus,
/// Could not find an available device name.
NoAvailableDeviceName,
/// Missing PCI device.
MissingPciDevice,
/// Failed to remove a PCI device from the PCI bus.
RemoveDeviceFromPciBus(pci::PciRootError),
/// Failed to remove a bus device from the IO bus.
RemoveDeviceFromIoBus(vm_device::BusError),
/// Failed to remove a bus device from the MMIO bus.
RemoveDeviceFromMmioBus(vm_device::BusError),
/// Failed to find the device corresponding to a specific PCI b/d/f.
UnknownPciBdf(u32),
/// Not allowed to remove this type of device from the VM.
RemovalNotAllowed(vm_virtio::VirtioDeviceType),
/// Failed to find device corresponding to the given identifier.
UnknownDeviceId(String),
/// Failed to find an available PCI device ID.
NextPciDeviceId(pci::PciRootError),
/// Could not reserve the PCI device ID.
GetPciDeviceId(pci::PciRootError),
/// Could not give the PCI device ID back.
PutPciDeviceId(pci::PciRootError),
/// Incorrect device ID as it is already used by another device.
DeviceIdAlreadyInUse,
/// No disk path was specified when one was expected
NoDiskPath,
/// Failed to update guest memory for virtio device.
UpdateMemoryForVirtioDevice(virtio_devices::Error),
/// Cannot create virtio-mem device
CreateVirtioMem(io::Error),
/// Cannot generate a ResizeSender from the Resize object.
CreateResizeSender(virtio_devices::mem::Error),
/// Cannot find a memory range for virtio-mem memory
VirtioMemRangeAllocation,
/// Failed to update guest memory for VFIO PCI device.
UpdateMemoryForVfioPciDevice(vfio_ioctls::VfioError),
/// Trying to use a directory for pmem but no size specified
PmemWithDirectorySizeMissing,
/// Trying to use a size that is not multiple of 2MiB
PmemSizeNotAligned,
/// Could not find the node in the device tree.
MissingNode,
/// Resource was already found.
ResourceAlreadyExists,
/// Expected resources for virtio-pci could not be found.
MissingVirtioPciResources,
/// Expected resources for virtio-pmem could not be found.
MissingVirtioPmemResources,
/// Missing PCI b/d/f from the DeviceNode.
MissingDeviceNodePciBdf,
/// No support for device passthrough
NoDevicePassthroughSupport,
/// Failed to resize virtio-balloon
VirtioBalloonResize(virtio_devices::balloon::Error),
/// Missing virtio-balloon, can't proceed as expected.
MissingVirtioBalloon,
/// Missing virtual IOMMU device
MissingVirtualIommu,
/// Failed to do power button notification
PowerButtonNotification(io::Error),
/// Failed to do AArch64 GPIO power button notification
#[cfg(target_arch = "aarch64")]
AArch64PowerButtonNotification(devices::legacy::GpioDeviceError),
/// Failed to set O_DIRECT flag to file descriptor
SetDirectIo,
/// Failed to create FixedVhdDiskAsync
CreateFixedVhdDiskAsync(io::Error),
/// Failed to create FixedVhdDiskSync
CreateFixedVhdDiskSync(io::Error),
/// Failed to create QcowDiskSync
CreateQcowDiskSync(qcow::Error),
/// Failed to create FixedVhdxDiskSync
CreateFixedVhdxDiskSync(vhdx::vhdx::VhdxError),
/// Failed to add DMA mapping handler to virtio-mem device.
AddDmaMappingHandlerVirtioMem(virtio_devices::mem::Error),
/// Failed to remove DMA mapping handler from virtio-mem device.
RemoveDmaMappingHandlerVirtioMem(virtio_devices::mem::Error),
/// Failed to create vfio-user client
VfioUserCreateClient(vfio_user::Error),
/// Failed to create VFIO user device
VfioUserCreate(VfioUserPciDeviceError),
/// Failed to map region from VFIO user device into guest
VfioUserMapRegion(VfioUserPciDeviceError),
/// Failed to DMA map VFIO user device.
VfioUserDmaMap(VfioUserPciDeviceError),
/// Failed to DMA unmap VFIO user device.
VfioUserDmaUnmap(VfioUserPciDeviceError),
/// Failed to update memory mappings for VFIO user device
UpdateMemoryForVfioUserPciDevice(VfioUserPciDeviceError),
/// Cannot duplicate file descriptor
DupFd(vmm_sys_util::errno::Error),
/// Failed to DMA map virtio device.
VirtioDmaMap(std::io::Error),
/// Failed to DMA unmap virtio device.
VirtioDmaUnmap(std::io::Error),
/// Cannot hotplug device behind vIOMMU
InvalidIommuHotplug,
/// Failed to create UEFI flash
CreateUefiFlash(hypervisor::vm::HypervisorVmError),
}
pub type DeviceManagerResult<T> = result::Result<T, DeviceManagerError>;
const DEVICE_MANAGER_ACPI_SIZE: usize = 0x10;
const TIOCSPTLCK: libc::c_int = 0x4004_5431;
const TIOCGTPEER: libc::c_int = 0x5441;
pub fn create_pty(non_blocking: bool) -> io::Result<(File, File, PathBuf)> {
// Try to use /dev/pts/ptmx first then fall back to /dev/ptmx
// This is done to try and use the devpts filesystem that
// could be available for use in the process's namespace first.
// Ideally these are all the same file though but different
// kernels could have things setup differently.
// See https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
// for further details.
let custom_flags = libc::O_NOCTTY | if non_blocking { libc::O_NONBLOCK } else { 0 };
let main = match OpenOptions::new()
.read(true)
.write(true)
.custom_flags(custom_flags)
.open("/dev/pts/ptmx")
{
Ok(f) => f,
_ => OpenOptions::new()
.read(true)
.write(true)
.custom_flags(custom_flags)
.open("/dev/ptmx")?,
};
let mut unlock: libc::c_ulong = 0;
// SAFETY: FFI call into libc, trivially safe
unsafe {
libc::ioctl(
main.as_raw_fd(),
TIOCSPTLCK.try_into().unwrap(),
&mut unlock,
)
};
// SAFETY: FFI call into libc, trivally safe
let sub_fd = unsafe {
libc::ioctl(
main.as_raw_fd(),
TIOCGTPEER.try_into().unwrap(),
libc::O_NOCTTY | libc::O_RDWR,
)
};
if sub_fd == -1 {
return vmm_sys_util::errno::errno_result().map_err(|e| e.into());
}
let proc_path = PathBuf::from(format!("/proc/self/fd/{}", sub_fd));
let path = read_link(proc_path)?;
// SAFETY: sub_fd is checked to be valid before being wrapped in File
Ok((main, unsafe { File::from_raw_fd(sub_fd) }, path))
}
#[derive(Default)]
pub struct Console {
console_resizer: Option<Arc<virtio_devices::ConsoleResizer>>,
}
impl Console {
pub fn update_console_size(&self) {
if let Some(resizer) = self.console_resizer.as_ref() {
resizer.update_console_size()
}
}
}
pub(crate) struct AddressManager {
pub(crate) allocator: Arc<Mutex<SystemAllocator>>,
#[cfg(target_arch = "x86_64")]
pub(crate) io_bus: Arc<Bus>,
pub(crate) mmio_bus: Arc<Bus>,
vm: Arc<dyn hypervisor::Vm>,
device_tree: Arc<Mutex<DeviceTree>>,
pci_mmio_allocators: Vec<Arc<Mutex<AddressAllocator>>>,
}
impl DeviceRelocation for AddressManager {
fn move_bar(
&self,
old_base: u64,
new_base: u64,
len: u64,
pci_dev: &mut dyn PciDevice,
region_type: PciBarRegionType,
) -> std::result::Result<(), std::io::Error> {
match region_type {
PciBarRegionType::IoRegion => {
#[cfg(target_arch = "x86_64")]
{
// Update system allocator
self.allocator
.lock()
.unwrap()
.free_io_addresses(GuestAddress(old_base), len as GuestUsize);
self.allocator
.lock()
.unwrap()
.allocate_io_addresses(
Some(GuestAddress(new_base)),
len as GuestUsize,
None,
)
.ok_or_else(|| {
io::Error::new(io::ErrorKind::Other, "failed allocating new IO range")
})?;
// Update PIO bus
self.io_bus
.update_range(old_base, len, new_base, len)
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
}
#[cfg(target_arch = "aarch64")]
error!("I/O region is not supported");
}
PciBarRegionType::Memory32BitRegion | PciBarRegionType::Memory64BitRegion => {
// Update system allocator
if region_type == PciBarRegionType::Memory32BitRegion {
self.allocator
.lock()
.unwrap()
.free_mmio_hole_addresses(GuestAddress(old_base), len as GuestUsize);
self.allocator
.lock()
.unwrap()
.allocate_mmio_hole_addresses(
Some(GuestAddress(new_base)),
len as GuestUsize,
Some(len),
)
.ok_or_else(|| {
io::Error::new(
io::ErrorKind::Other,
"failed allocating new 32 bits MMIO range",
)
})?;
} else {
// Find the specific allocator that this BAR was allocated from and use it for new one
for allocator in &self.pci_mmio_allocators {
let allocator_base = allocator.lock().unwrap().base();
let allocator_end = allocator.lock().unwrap().end();
if old_base >= allocator_base.0 && old_base <= allocator_end.0 {
allocator
.lock()
.unwrap()
.free(GuestAddress(old_base), len as GuestUsize);
allocator
.lock()
.unwrap()
.allocate(
Some(GuestAddress(new_base)),
len as GuestUsize,
Some(len),
)
.ok_or_else(|| {
io::Error::new(
io::ErrorKind::Other,
"failed allocating new 64 bits MMIO range",
)
})?;
break;
}
}
}
// Update MMIO bus
self.mmio_bus
.update_range(old_base, len, new_base, len)
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
}
}
let any_dev = pci_dev.as_any();
if let Some(virtio_pci_dev) = any_dev.downcast_ref::<VirtioPciDevice>() {
// Update the device_tree resources associated with the device
if let Some(node) = self
.device_tree
.lock()
.unwrap()
.get_mut(&virtio_pci_dev.id())
{
let mut resource_updated = false;
for resource in node.resources.iter_mut() {
if let Resource::MmioAddressRange { base, .. } = resource {
if *base == old_base {
*base = new_base;
resource_updated = true;
break;
}
}
}
if !resource_updated {
return Err(io::Error::new(
io::ErrorKind::Other,
format!(
"Couldn't find a resource with base 0x{:x} for device {}",
old_base,
virtio_pci_dev.id()
),
));
}
} else {
return Err(io::Error::new(
io::ErrorKind::Other,
format!(
"Couldn't find device {} from device tree",
virtio_pci_dev.id()
),
));
}
let bar_addr = virtio_pci_dev.config_bar_addr();
if bar_addr == new_base {
for (event, addr) in virtio_pci_dev.ioeventfds(old_base) {
let io_addr = IoEventAddress::Mmio(addr);
self.vm.unregister_ioevent(event, &io_addr).map_err(|e| {
io::Error::new(
io::ErrorKind::Other,
format!("failed to unregister ioevent: {:?}", e),
)
})?;
}
for (event, addr) in virtio_pci_dev.ioeventfds(new_base) {
let io_addr = IoEventAddress::Mmio(addr);
self.vm
.register_ioevent(event, &io_addr, None)
.map_err(|e| {
io::Error::new(
io::ErrorKind::Other,
format!("failed to register ioevent: {:?}", e),
)
})?;
}
} else {
let virtio_dev = virtio_pci_dev.virtio_device();
let mut virtio_dev = virtio_dev.lock().unwrap();
if let Some(mut shm_regions) = virtio_dev.get_shm_regions() {
if shm_regions.addr.raw_value() == old_base {
let mem_region = self.vm.make_user_memory_region(
shm_regions.mem_slot,
old_base,
shm_regions.len,
shm_regions.host_addr,
false,
false,
);
self.vm.remove_user_memory_region(mem_region).map_err(|e| {
io::Error::new(
io::ErrorKind::Other,
format!("failed to remove user memory region: {:?}", e),
)
})?;
// Create new mapping by inserting new region to KVM.
let mem_region = self.vm.make_user_memory_region(
shm_regions.mem_slot,
new_base,
shm_regions.len,
shm_regions.host_addr,
false,
false,
);
self.vm.create_user_memory_region(mem_region).map_err(|e| {
io::Error::new(
io::ErrorKind::Other,
format!("failed to create user memory regions: {:?}", e),
)
})?;
// Update shared memory regions to reflect the new mapping.
shm_regions.addr = GuestAddress(new_base);
virtio_dev.set_shm_regions(shm_regions).map_err(|e| {
io::Error::new(
io::ErrorKind::Other,
format!("failed to update shared memory regions: {:?}", e),
)
})?;
}
}
}
}
pci_dev.move_bar(old_base, new_base)
}
}
#[derive(Serialize, Deserialize)]
struct DeviceManagerState {
device_tree: DeviceTree,
device_id_cnt: Wrapping<usize>,
}
#[derive(Debug)]
pub struct PtyPair {
pub main: File,
pub sub: File,
pub path: PathBuf,
}
impl Clone for PtyPair {
fn clone(&self) -> Self {
PtyPair {
main: self.main.try_clone().unwrap(),
sub: self.sub.try_clone().unwrap(),
path: self.path.clone(),
}
}
}
#[derive(Clone)]
pub enum PciDeviceHandle {
Vfio(Arc<Mutex<VfioPciDevice>>),
Virtio(Arc<Mutex<VirtioPciDevice>>),
VfioUser(Arc<Mutex<VfioUserPciDevice>>),
}
#[derive(Clone)]
struct MetaVirtioDevice {
virtio_device: Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: bool,
id: String,
pci_segment: u16,
dma_handler: Option<Arc<dyn ExternalDmaMapping>>,
}
pub struct DeviceManager {
// Manage address space related to devices
address_manager: Arc<AddressManager>,
// Console abstraction
console: Arc<Console>,
// console PTY
console_pty: Option<Arc<Mutex<PtyPair>>>,
// serial PTY
serial_pty: Option<Arc<Mutex<PtyPair>>>,
// Serial Manager
serial_manager: Option<Arc<SerialManager>>,
// pty foreground status,
console_resize_pipe: Option<Arc<File>>,
// Interrupt controller
#[cfg(target_arch = "x86_64")]
interrupt_controller: Option<Arc<Mutex<ioapic::Ioapic>>>,
#[cfg(target_arch = "aarch64")]
interrupt_controller: Option<Arc<Mutex<gic::Gic>>>,
// Things to be added to the commandline (i.e. for virtio-mmio)
cmdline_additions: Vec<String>,
// ACPI GED notification device
ged_notification_device: Option<Arc<Mutex<devices::AcpiGedDevice>>>,
// VM configuration
config: Arc<Mutex<VmConfig>>,
// Memory Manager
memory_manager: Arc<Mutex<MemoryManager>>,
// The virtio devices on the system
virtio_devices: Vec<MetaVirtioDevice>,
// List of bus devices
// Let the DeviceManager keep strong references to the BusDevice devices.
// This allows the IO and MMIO buses to be provided with Weak references,
// which prevents cyclic dependencies.
bus_devices: Vec<Arc<Mutex<dyn BusDevice>>>,
// Counter to keep track of the consumed device IDs.
device_id_cnt: Wrapping<usize>,
pci_segments: Vec<PciSegment>,
#[cfg_attr(target_arch = "aarch64", allow(dead_code))]
// MSI Interrupt Manager
msi_interrupt_manager: Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>>,
#[cfg_attr(feature = "mshv", allow(dead_code))]
// Legacy Interrupt Manager
legacy_interrupt_manager: Option<Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>>,
// Passthrough device handle
passthrough_device: Option<Arc<dyn hypervisor::Device>>,
// VFIO container
// Only one container can be created, therefore it is stored as part of the
// DeviceManager to be reused.
vfio_container: Option<Arc<VfioContainer>>,
// Paravirtualized IOMMU
iommu_device: Option<Arc<Mutex<virtio_devices::Iommu>>>,
iommu_mapping: Option<Arc<IommuMapping>>,
// PCI information about devices attached to the paravirtualized IOMMU
// It contains the virtual IOMMU PCI BDF along with the list of PCI BDF
// representing the devices attached to the virtual IOMMU. This is useful
// information for filling the ACPI VIOT table.
iommu_attached_devices: Option<(PciBdf, Vec<PciBdf>)>,
// Tree of devices, representing the dependencies between devices.
// Useful for introspection, snapshot and restore.
device_tree: Arc<Mutex<DeviceTree>>,
// Exit event
exit_evt: EventFd,
reset_evt: EventFd,
#[cfg(target_arch = "aarch64")]
id_to_dev_info: HashMap<(DeviceType, String), MmioDeviceInfo>,
// seccomp action
seccomp_action: SeccompAction,
// List of guest NUMA nodes.
numa_nodes: NumaNodes,
// Possible handle to the virtio-balloon device
balloon: Option<Arc<Mutex<virtio_devices::Balloon>>>,
// Virtio Device activation EventFd to allow the VMM thread to trigger device
// activation and thus start the threads from the VMM thread
activate_evt: EventFd,
acpi_address: GuestAddress,
selected_segment: usize,
// Possible handle to the virtio-mem device
virtio_mem_devices: Vec<Arc<Mutex<virtio_devices::Mem>>>,
#[cfg(target_arch = "aarch64")]
// GPIO device for AArch64
gpio_device: Option<Arc<Mutex<devices::legacy::Gpio>>>,
#[cfg(target_arch = "aarch64")]
// Flash device for UEFI on AArch64
uefi_flash: Option<GuestMemoryAtomic<GuestMemoryMmap>>,
// Flag to force setting the iommu on virtio devices
force_iommu: bool,
// Helps identify if the VM is currently being restored
restoring: bool,
// io_uring availability if detected
io_uring_supported: Option<bool>,
}
impl DeviceManager {
#[allow(clippy::too_many_arguments)]
pub fn new(
vm: Arc<dyn hypervisor::Vm>,
config: Arc<Mutex<VmConfig>>,
memory_manager: Arc<Mutex<MemoryManager>>,
exit_evt: &EventFd,
reset_evt: &EventFd,
seccomp_action: SeccompAction,
numa_nodes: NumaNodes,
activate_evt: &EventFd,
force_iommu: bool,
restoring: bool,
) -> DeviceManagerResult<Arc<Mutex<Self>>> {
let device_tree = Arc::new(Mutex::new(DeviceTree::new()));
let num_pci_segments =
if let Some(platform_config) = config.lock().unwrap().platform.as_ref() {
platform_config.num_pci_segments
} else {
1
};
let start_of_device_area = memory_manager.lock().unwrap().start_of_device_area().0;
let end_of_device_area = memory_manager.lock().unwrap().end_of_device_area().0;
// Start each PCI segment range on a 4GiB boundary
let pci_segment_size = (end_of_device_area - start_of_device_area + 1)
/ ((4 << 30) * num_pci_segments as u64)
* (4 << 30);
let mut pci_mmio_allocators = vec![];
for i in 0..num_pci_segments as u64 {
let mmio_start = start_of_device_area + i * pci_segment_size;
let allocator = Arc::new(Mutex::new(
AddressAllocator::new(GuestAddress(mmio_start), pci_segment_size).unwrap(),
));
pci_mmio_allocators.push(allocator)
}
let address_manager = Arc::new(AddressManager {
allocator: memory_manager.lock().unwrap().allocator(),
#[cfg(target_arch = "x86_64")]
io_bus: Arc::new(Bus::new()),
mmio_bus: Arc::new(Bus::new()),
vm: vm.clone(),
device_tree: Arc::clone(&device_tree),
pci_mmio_allocators,
});
// First we create the MSI interrupt manager, the legacy one is created
// later, after the IOAPIC device creation.
// The reason we create the MSI one first is because the IOAPIC needs it,
// and then the legacy interrupt manager needs an IOAPIC. So we're
// handling a linear dependency chain:
// msi_interrupt_manager <- IOAPIC <- legacy_interrupt_manager.
let msi_interrupt_manager: Arc<dyn InterruptManager<GroupConfig = MsiIrqGroupConfig>> =
Arc::new(MsiInterruptManager::new(
Arc::clone(&address_manager.allocator),
vm,
));
let acpi_address = address_manager
.allocator
.lock()
.unwrap()
.allocate_platform_mmio_addresses(None, DEVICE_MANAGER_ACPI_SIZE as u64, None)
.ok_or(DeviceManagerError::AllocateIoPort)?;
let mut pci_irq_slots = [0; 32];
PciSegment::reserve_legacy_interrupts_for_pci_devices(
&address_manager,
&mut pci_irq_slots,
)?;
let mut pci_segments = vec![PciSegment::new_default_segment(
&address_manager,
Arc::clone(&address_manager.pci_mmio_allocators[0]),
&pci_irq_slots,
)?];
for i in 1..num_pci_segments as usize {
pci_segments.push(PciSegment::new(
i as u16,
&address_manager,
Arc::clone(&address_manager.pci_mmio_allocators[i]),
&pci_irq_slots,
)?);
}
let device_manager = DeviceManager {
address_manager: Arc::clone(&address_manager),
console: Arc::new(Console::default()),
interrupt_controller: None,
cmdline_additions: Vec::new(),
ged_notification_device: None,
config,
memory_manager,
virtio_devices: Vec::new(),
bus_devices: Vec::new(),
device_id_cnt: Wrapping(0),
msi_interrupt_manager,
legacy_interrupt_manager: None,
passthrough_device: None,
vfio_container: None,
iommu_device: None,
iommu_mapping: None,
iommu_attached_devices: None,
pci_segments,
device_tree,
exit_evt: exit_evt.try_clone().map_err(DeviceManagerError::EventFd)?,
reset_evt: reset_evt.try_clone().map_err(DeviceManagerError::EventFd)?,
#[cfg(target_arch = "aarch64")]
id_to_dev_info: HashMap::new(),
seccomp_action,
numa_nodes,
balloon: None,
activate_evt: activate_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
acpi_address,
selected_segment: 0,
serial_pty: None,
serial_manager: None,
console_pty: None,
console_resize_pipe: None,
virtio_mem_devices: Vec::new(),
#[cfg(target_arch = "aarch64")]
gpio_device: None,
#[cfg(target_arch = "aarch64")]
uefi_flash: None,
force_iommu,
restoring,
io_uring_supported: None,
};
let device_manager = Arc::new(Mutex::new(device_manager));
address_manager
.mmio_bus
.insert(
Arc::clone(&device_manager) as Arc<Mutex<dyn BusDevice>>,
acpi_address.0,
DEVICE_MANAGER_ACPI_SIZE as u64,
)
.map_err(DeviceManagerError::BusError)?;
Ok(device_manager)
}
pub fn serial_pty(&self) -> Option<PtyPair> {
self.serial_pty
.as_ref()
.map(|pty| pty.lock().unwrap().clone())
}
pub fn console_pty(&self) -> Option<PtyPair> {
self.console_pty
.as_ref()
.map(|pty| pty.lock().unwrap().clone())
}
pub fn console_resize_pipe(&self) -> Option<Arc<File>> {
self.console_resize_pipe.as_ref().map(Arc::clone)
}
pub fn create_devices(
&mut self,
serial_pty: Option<PtyPair>,
console_pty: Option<PtyPair>,
console_resize_pipe: Option<File>,
) -> DeviceManagerResult<()> {
let mut virtio_devices: Vec<MetaVirtioDevice> = Vec::new();
let interrupt_controller = self.add_interrupt_controller()?;
// Now we can create the legacy interrupt manager, which needs the freshly
// formed IOAPIC device.
let legacy_interrupt_manager: Arc<
dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>,
> = Arc::new(LegacyUserspaceInterruptManager::new(Arc::clone(
&interrupt_controller,
)));
{
if let Some(acpi_address) = self.memory_manager.lock().unwrap().acpi_address() {
self.address_manager
.mmio_bus
.insert(
Arc::clone(&self.memory_manager) as Arc<Mutex<dyn BusDevice>>,
acpi_address.0,
MEMORY_MANAGER_ACPI_SIZE as u64,
)
.map_err(DeviceManagerError::BusError)?;
}
}
#[cfg(target_arch = "x86_64")]
self.add_legacy_devices(
self.reset_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)?;
#[cfg(target_arch = "aarch64")]
self.add_legacy_devices(&legacy_interrupt_manager)?;
{
self.ged_notification_device = self.add_acpi_devices(
&legacy_interrupt_manager,
self.reset_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)?;
}
self.console = self.add_console_device(
&legacy_interrupt_manager,
&mut virtio_devices,
serial_pty,
console_pty,
console_resize_pipe,
)?;
self.legacy_interrupt_manager = Some(legacy_interrupt_manager);
virtio_devices.append(&mut self.make_virtio_devices()?);
self.add_pci_devices(virtio_devices.clone())?;
self.virtio_devices = virtio_devices;
Ok(())
}
fn state(&self) -> DeviceManagerState {
DeviceManagerState {
device_tree: self.device_tree.lock().unwrap().clone(),
device_id_cnt: self.device_id_cnt,
}
}
fn set_state(&mut self, state: &DeviceManagerState) {
*self.device_tree.lock().unwrap() = state.device_tree.clone();
self.device_id_cnt = state.device_id_cnt;
}
fn get_msi_iova_space(&mut self) -> (u64, u64) {
#[cfg(target_arch = "aarch64")]
{
let vcpus = self.config.lock().unwrap().cpus.boot_vcpus;
let msi_start = arch::layout::GIC_V3_DIST_START.raw_value()
- arch::layout::GIC_V3_REDIST_SIZE * (vcpus as u64)
- arch::layout::GIC_V3_ITS_SIZE;
let msi_end = msi_start + arch::layout::GIC_V3_ITS_SIZE - 1;
(msi_start, msi_end)
}
#[cfg(target_arch = "x86_64")]
(0xfee0_0000, 0xfeef_ffff)
}
#[cfg(target_arch = "aarch64")]
/// Gets the information of the devices registered up to some point in time.
pub fn get_device_info(&self) -> &HashMap<(DeviceType, String), MmioDeviceInfo> {
&self.id_to_dev_info
}
#[allow(unused_variables)]
fn add_pci_devices(
&mut self,
virtio_devices: Vec<MetaVirtioDevice>,
) -> DeviceManagerResult<()> {
let iommu_id = String::from(IOMMU_DEVICE_NAME);
let iommu_device = if self.config.lock().unwrap().iommu {
let (device, mapping) = virtio_devices::Iommu::new(
iommu_id.clone(),
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
self.get_msi_iova_space(),
)
.map_err(DeviceManagerError::CreateVirtioIommu)?;
let device = Arc::new(Mutex::new(device));
self.iommu_device = Some(Arc::clone(&device));
self.iommu_mapping = Some(mapping);
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(iommu_id.clone(), device_node!(iommu_id, device));
Some(device)
} else {
None
};
let mut iommu_attached_devices = Vec::new();
{
for handle in virtio_devices {
let mapping: Option<Arc<IommuMapping>> = if handle.iommu {
self.iommu_mapping.clone()
} else {
None
};
let dev_id = self.add_virtio_pci_device(
handle.virtio_device,
&mapping,
handle.id,
handle.pci_segment,
handle.dma_handler,
)?;
if handle.iommu {
iommu_attached_devices.push(dev_id);
}
}
let mut vfio_iommu_device_ids = self.add_vfio_devices()?;
iommu_attached_devices.append(&mut vfio_iommu_device_ids);
let mut vfio_user_iommu_device_ids = self.add_user_devices()?;
iommu_attached_devices.append(&mut vfio_user_iommu_device_ids);
// Add all devices from forced iommu segments
if let Some(platform_config) = self.config.lock().unwrap().platform.as_ref() {
if let Some(iommu_segments) = platform_config.iommu_segments.as_ref() {
for segment in iommu_segments {
for device in 0..32 {
let bdf = PciBdf::new(*segment, 0, device, 0);
if !iommu_attached_devices.contains(&bdf) {
iommu_attached_devices.push(bdf);
}
}
}
}
}
if let Some(iommu_device) = iommu_device {
let dev_id = self.add_virtio_pci_device(iommu_device, &None, iommu_id, 0, None)?;
self.iommu_attached_devices = Some((dev_id, iommu_attached_devices));
}
}
for segment in &self.pci_segments {
#[cfg(target_arch = "x86_64")]
if let Some(pci_config_io) = segment.pci_config_io.as_ref() {
self.bus_devices
.push(Arc::clone(pci_config_io) as Arc<Mutex<dyn BusDevice>>);
}
self.bus_devices
.push(Arc::clone(&segment.pci_config_mmio) as Arc<Mutex<dyn BusDevice>>);
}
Ok(())
}
#[cfg(target_arch = "aarch64")]
fn add_interrupt_controller(
&mut self,
) -> DeviceManagerResult<Arc<Mutex<dyn InterruptController>>> {
let interrupt_controller: Arc<Mutex<gic::Gic>> = Arc::new(Mutex::new(
gic::Gic::new(
self.config.lock().unwrap().cpus.boot_vcpus,
Arc::clone(&self.msi_interrupt_manager),
)
.map_err(DeviceManagerError::CreateInterruptController)?,
));
self.interrupt_controller = Some(interrupt_controller.clone());
// Unlike x86_64, the "interrupt_controller" here for AArch64 is only
// a `Gic` object that implements the `InterruptController` to provide
// interrupt delivery service. This is not the real GIC device so that
// we do not need to insert it to the device tree.
Ok(interrupt_controller)
}
#[cfg(target_arch = "aarch64")]
pub fn get_interrupt_controller(&mut self) -> Option<&Arc<Mutex<gic::Gic>>> {
self.interrupt_controller.as_ref()
}
#[cfg(target_arch = "x86_64")]
fn add_interrupt_controller(
&mut self,
) -> DeviceManagerResult<Arc<Mutex<dyn InterruptController>>> {
let id = String::from(IOAPIC_DEVICE_NAME);
// Create IOAPIC
let interrupt_controller = Arc::new(Mutex::new(
ioapic::Ioapic::new(
id.clone(),
APIC_START,
Arc::clone(&self.msi_interrupt_manager),
)
.map_err(DeviceManagerError::CreateInterruptController)?,
));
self.interrupt_controller = Some(interrupt_controller.clone());
self.address_manager
.mmio_bus
.insert(interrupt_controller.clone(), IOAPIC_START.0, IOAPIC_SIZE)
.map_err(DeviceManagerError::BusError)?;
self.bus_devices
.push(Arc::clone(&interrupt_controller) as Arc<Mutex<dyn BusDevice>>);
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, interrupt_controller));
Ok(interrupt_controller)
}
fn add_acpi_devices(
&mut self,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>,
reset_evt: EventFd,
exit_evt: EventFd,
) -> DeviceManagerResult<Option<Arc<Mutex<devices::AcpiGedDevice>>>> {
let shutdown_device = Arc::new(Mutex::new(devices::AcpiShutdownDevice::new(
exit_evt, reset_evt,
)));
self.bus_devices
.push(Arc::clone(&shutdown_device) as Arc<Mutex<dyn BusDevice>>);
#[cfg(target_arch = "x86_64")]
{
self.address_manager
.allocator
.lock()
.unwrap()
.allocate_io_addresses(Some(GuestAddress(0x3c0)), 0x8, None)
.ok_or(DeviceManagerError::AllocateIoPort)?;
self.address_manager
.io_bus
.insert(shutdown_device, 0x3c0, 0x4)
.map_err(DeviceManagerError::BusError)?;
}
let ged_irq = self
.address_manager
.allocator
.lock()
.unwrap()
.allocate_irq()
.unwrap();
let interrupt_group = interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: ged_irq as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?;
let ged_address = self
.address_manager
.allocator
.lock()
.unwrap()
.allocate_platform_mmio_addresses(
None,
devices::acpi::GED_DEVICE_ACPI_SIZE as u64,
None,
)
.ok_or(DeviceManagerError::AllocateMmioAddress)?;
let ged_device = Arc::new(Mutex::new(devices::AcpiGedDevice::new(
interrupt_group,
ged_irq,
ged_address,
)));
self.address_manager
.mmio_bus
.insert(
ged_device.clone(),
ged_address.0,
devices::acpi::GED_DEVICE_ACPI_SIZE as u64,
)
.map_err(DeviceManagerError::BusError)?;
self.bus_devices
.push(Arc::clone(&ged_device) as Arc<Mutex<dyn BusDevice>>);
let pm_timer_device = Arc::new(Mutex::new(devices::AcpiPmTimerDevice::new()));
self.bus_devices
.push(Arc::clone(&pm_timer_device) as Arc<Mutex<dyn BusDevice>>);
#[cfg(target_arch = "x86_64")]
{
self.address_manager
.allocator
.lock()
.unwrap()
.allocate_io_addresses(Some(GuestAddress(0xb008)), 0x4, None)
.ok_or(DeviceManagerError::AllocateIoPort)?;
self.address_manager
.io_bus
.insert(pm_timer_device, 0xb008, 0x4)
.map_err(DeviceManagerError::BusError)?;
}
Ok(Some(ged_device))
}
#[cfg(target_arch = "x86_64")]
fn add_legacy_devices(&mut self, reset_evt: EventFd) -> DeviceManagerResult<()> {
// Add a shutdown device (i8042)
let i8042 = Arc::new(Mutex::new(devices::legacy::I8042Device::new(
reset_evt.try_clone().unwrap(),
)));
self.bus_devices
.push(Arc::clone(&i8042) as Arc<Mutex<dyn BusDevice>>);
self.address_manager
.io_bus
.insert(i8042, 0x61, 0x4)
.map_err(DeviceManagerError::BusError)?;
{
// Add a CMOS emulated device
let mem_size = self
.memory_manager
.lock()
.unwrap()
.guest_memory()
.memory()
.last_addr()
.0
+ 1;
let mem_below_4g = std::cmp::min(arch::layout::MEM_32BIT_RESERVED_START.0, mem_size);
let mem_above_4g = mem_size.saturating_sub(arch::layout::RAM_64BIT_START.0);
let cmos = Arc::new(Mutex::new(devices::legacy::Cmos::new(
mem_below_4g,
mem_above_4g,
reset_evt,
)));
self.bus_devices
.push(Arc::clone(&cmos) as Arc<Mutex<dyn BusDevice>>);
self.address_manager
.io_bus
.insert(cmos, 0x70, 0x2)
.map_err(DeviceManagerError::BusError)?;
}
#[cfg(feature = "fwdebug")]
{
let fwdebug = Arc::new(Mutex::new(devices::legacy::FwDebugDevice::new()));
self.bus_devices
.push(Arc::clone(&fwdebug) as Arc<Mutex<dyn BusDevice>>);
self.address_manager
.io_bus
.insert(fwdebug, 0x402, 0x1)
.map_err(DeviceManagerError::BusError)?;
}
Ok(())
}
#[cfg(target_arch = "aarch64")]
fn add_legacy_devices(
&mut self,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>,
) -> DeviceManagerResult<()> {
// Add a RTC device
let rtc_irq = self
.address_manager
.allocator
.lock()
.unwrap()
.allocate_irq()
.unwrap();
let interrupt_group = interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: rtc_irq as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?;
let rtc_device = Arc::new(Mutex::new(devices::legacy::Rtc::new(interrupt_group)));
self.bus_devices
.push(Arc::clone(&rtc_device) as Arc<Mutex<dyn BusDevice>>);
let addr = arch::layout::LEGACY_RTC_MAPPED_IO_START;
self.address_manager
.mmio_bus
.insert(rtc_device, addr.0, MMIO_LEN)
.map_err(DeviceManagerError::BusError)?;
self.id_to_dev_info.insert(
(DeviceType::Rtc, "rtc".to_string()),
MmioDeviceInfo {
addr: addr.0,
len: MMIO_LEN,
irq: rtc_irq,
},
);
// Add a GPIO device
let id = String::from(GPIO_DEVICE_NAME_PREFIX);
let gpio_irq = self
.address_manager
.allocator
.lock()
.unwrap()
.allocate_irq()
.unwrap();
let interrupt_group = interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: gpio_irq as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?;
let gpio_device = Arc::new(Mutex::new(devices::legacy::Gpio::new(
id.clone(),
interrupt_group,
)));
self.bus_devices
.push(Arc::clone(&gpio_device) as Arc<Mutex<dyn BusDevice>>);
let addr = arch::layout::LEGACY_GPIO_MAPPED_IO_START;
self.address_manager
.mmio_bus
.insert(gpio_device.clone(), addr.0, MMIO_LEN)
.map_err(DeviceManagerError::BusError)?;
self.gpio_device = Some(gpio_device.clone());
self.id_to_dev_info.insert(
(DeviceType::Gpio, "gpio".to_string()),
MmioDeviceInfo {
addr: addr.0,
len: MMIO_LEN,
irq: gpio_irq,
},
);
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, gpio_device));
// On AArch64, the UEFI binary requires a flash device at address 0.
// 4 MiB memory is mapped to simulate the flash.
let uefi_mem_slot = self.memory_manager.lock().unwrap().allocate_memory_slot();
let uefi_region = GuestRegionMmap::new(
MmapRegion::new(arch::layout::UEFI_SIZE as usize).unwrap(),
arch::layout::UEFI_START,
)
.unwrap();
let uefi_mem_region = self
.memory_manager
.lock()
.unwrap()
.vm
.make_user_memory_region(
uefi_mem_slot,
uefi_region.start_addr().raw_value(),
uefi_region.len() as u64,
uefi_region.as_ptr() as u64,
false,
false,
);
self.memory_manager
.lock()
.unwrap()
.vm
.create_user_memory_region(uefi_mem_region)
.map_err(DeviceManagerError::CreateUefiFlash)?;
let uefi_flash =
GuestMemoryAtomic::new(GuestMemoryMmap::from_regions(vec![uefi_region]).unwrap());
self.uefi_flash = Some(uefi_flash);
Ok(())
}
#[cfg(target_arch = "x86_64")]
fn add_serial_device(
&mut self,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>,
serial_writer: Option<Box<dyn io::Write + Send>>,
) -> DeviceManagerResult<Arc<Mutex<Serial>>> {
// Serial is tied to IRQ #4
let serial_irq = 4;
let id = String::from(SERIAL_DEVICE_NAME_PREFIX);
let interrupt_group = interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: serial_irq as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?;
let serial = Arc::new(Mutex::new(Serial::new(
id.clone(),
interrupt_group,
serial_writer,
)));
self.bus_devices
.push(Arc::clone(&serial) as Arc<Mutex<dyn BusDevice>>);
self.address_manager
.allocator
.lock()
.unwrap()
.allocate_io_addresses(Some(GuestAddress(0x3f8)), 0x8, None)
.ok_or(DeviceManagerError::AllocateIoPort)?;
self.address_manager
.io_bus
.insert(serial.clone(), 0x3f8, 0x8)
.map_err(DeviceManagerError::BusError)?;
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, serial));
Ok(serial)
}
#[cfg(target_arch = "aarch64")]
fn add_serial_device(
&mut self,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>,
serial_writer: Option<Box<dyn io::Write + Send>>,
) -> DeviceManagerResult<Arc<Mutex<Pl011>>> {
let id = String::from(SERIAL_DEVICE_NAME_PREFIX);
let serial_irq = self
.address_manager
.allocator
.lock()
.unwrap()
.allocate_irq()
.unwrap();
let interrupt_group = interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: serial_irq as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?;
let serial = Arc::new(Mutex::new(devices::legacy::Pl011::new(
id.clone(),
interrupt_group,
serial_writer,
)));
self.bus_devices
.push(Arc::clone(&serial) as Arc<Mutex<dyn BusDevice>>);
let addr = arch::layout::LEGACY_SERIAL_MAPPED_IO_START;
self.address_manager
.mmio_bus
.insert(serial.clone(), addr.0, MMIO_LEN)
.map_err(DeviceManagerError::BusError)?;
self.id_to_dev_info.insert(
(DeviceType::Serial, DeviceType::Serial.to_string()),
MmioDeviceInfo {
addr: addr.0,
len: MMIO_LEN,
irq: serial_irq,
},
);
self.cmdline_additions
.push(format!("earlycon=pl011,mmio,0x{:08x}", addr.0));
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, serial));
Ok(serial)
}
fn modify_mode<F: FnOnce(&mut termios)>(
&self,
fd: RawFd,
f: F,
) -> vmm_sys_util::errno::Result<()> {
// SAFETY: safe because we check the return value of isatty.
if unsafe { isatty(fd) } != 1 {
return Ok(());
}
// SAFETY: The following pair are safe because termios gets totally overwritten by tcgetattr
// and we check the return result.
let mut termios: termios = unsafe { zeroed() };
let ret = unsafe { tcgetattr(fd, &mut termios as *mut _) };
if ret < 0 {
return vmm_sys_util::errno::errno_result();
}
f(&mut termios);
// SAFETY: Safe because the syscall will only read the extent of termios and we check
// the return result.
let ret = unsafe { tcsetattr(fd, TCSANOW, &termios as *const _) };
if ret < 0 {
return vmm_sys_util::errno::errno_result();
}
Ok(())
}
fn set_raw_mode(&self, f: &mut File) -> vmm_sys_util::errno::Result<()> {
// SAFETY: FFI call. Variable t is guaranteed to be a valid termios from modify_mode.
self.modify_mode(f.as_raw_fd(), |t| unsafe { cfmakeraw(t) })
}
fn listen_for_sigwinch_on_tty(&mut self, pty: &File) -> std::io::Result<()> {
let seccomp_filter =
get_seccomp_filter(&self.seccomp_action, Thread::PtyForeground).unwrap();
match start_sigwinch_listener(seccomp_filter, pty) {
Ok(pipe) => {
self.console_resize_pipe = Some(Arc::new(pipe));
}
Err(e) => {
warn!("Ignoring error from setting up SIGWINCH listener: {}", e)
}
}
Ok(())
}
fn add_virtio_console_device(
&mut self,
virtio_devices: &mut Vec<MetaVirtioDevice>,
console_pty: Option<PtyPair>,
resize_pipe: Option<File>,
) -> DeviceManagerResult<Option<Arc<virtio_devices::ConsoleResizer>>> {
let console_config = self.config.lock().unwrap().console.clone();
let endpoint = match console_config.mode {
ConsoleOutputMode::File => {
let file = File::create(console_config.file.as_ref().unwrap())
.map_err(DeviceManagerError::ConsoleOutputFileOpen)?;
Endpoint::File(file)
}
ConsoleOutputMode::Pty => {
if let Some(pty) = console_pty {
self.config.lock().unwrap().console.file = Some(pty.path.clone());
let file = pty.main.try_clone().unwrap();
self.console_pty = Some(Arc::new(Mutex::new(pty)));
self.console_resize_pipe = resize_pipe.map(Arc::new);
Endpoint::FilePair(file.try_clone().unwrap(), file)
} else {
let (main, mut sub, path) =
create_pty(false).map_err(DeviceManagerError::ConsolePtyOpen)?;
self.set_raw_mode(&mut sub)
.map_err(DeviceManagerError::SetPtyRaw)?;
self.config.lock().unwrap().console.file = Some(path.clone());
let file = main.try_clone().unwrap();
assert!(resize_pipe.is_none());
self.listen_for_sigwinch_on_tty(&sub).unwrap();
self.console_pty = Some(Arc::new(Mutex::new(PtyPair { main, sub, path })));
Endpoint::FilePair(file.try_clone().unwrap(), file)
}
}
ConsoleOutputMode::Tty => {
// Duplicating the file descriptors like this is needed as otherwise
// they will be closed on a reboot and the numbers reused
// SAFETY: FFI call to dup. Trivially safe.
let stdout = unsafe { libc::dup(libc::STDOUT_FILENO) };
if stdout == -1 {
return vmm_sys_util::errno::errno_result().map_err(DeviceManagerError::DupFd);
}
// SAFETY: stdout is valid and owned solely by us.
let stdout = unsafe { File::from_raw_fd(stdout) };
// If an interactive TTY then we can accept input
// SAFETY: FFI call. Trivially safe.
if unsafe { libc::isatty(libc::STDIN_FILENO) == 1 } {
// SAFETY: FFI call to dup. Trivially safe.
let stdin = unsafe { libc::dup(libc::STDIN_FILENO) };
if stdin == -1 {
return vmm_sys_util::errno::errno_result()
.map_err(DeviceManagerError::DupFd);
}
// SAFETY: stdin is valid and owned solely by us.
let stdin = unsafe { File::from_raw_fd(stdin) };
Endpoint::FilePair(stdout, stdin)
} else {
Endpoint::File(stdout)
}
}
ConsoleOutputMode::Null => Endpoint::Null,
ConsoleOutputMode::Off => return Ok(None),
};
let id = String::from(CONSOLE_DEVICE_NAME);
let (virtio_console_device, console_resizer) = virtio_devices::Console::new(
id.clone(),
endpoint,
self.console_resize_pipe
.as_ref()
.map(|p| p.try_clone().unwrap()),
self.force_iommu | console_config.iommu,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioConsole)?;
let virtio_console_device = Arc::new(Mutex::new(virtio_console_device));
virtio_devices.push(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_console_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: console_config.iommu,
id: id.clone(),
pci_segment: 0,
dma_handler: None,
});
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, virtio_console_device));
// Only provide a resizer (for SIGWINCH handling) if the console is attached to the TTY
Ok(if matches!(console_config.mode, ConsoleOutputMode::Tty) {
Some(console_resizer)
} else {
None
})
}
fn add_console_device(
&mut self,
interrupt_manager: &Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>,
virtio_devices: &mut Vec<MetaVirtioDevice>,
serial_pty: Option<PtyPair>,
console_pty: Option<PtyPair>,
console_resize_pipe: Option<File>,
) -> DeviceManagerResult<Arc<Console>> {
let serial_config = self.config.lock().unwrap().serial.clone();
let serial_writer: Option<Box<dyn io::Write + Send>> = match serial_config.mode {
ConsoleOutputMode::File => Some(Box::new(
File::create(serial_config.file.as_ref().unwrap())
.map_err(DeviceManagerError::SerialOutputFileOpen)?,
)),
ConsoleOutputMode::Pty => {
if let Some(pty) = serial_pty {
self.config.lock().unwrap().serial.file = Some(pty.path.clone());
self.serial_pty = Some(Arc::new(Mutex::new(pty)));
} else {
let (main, mut sub, path) =
create_pty(true).map_err(DeviceManagerError::SerialPtyOpen)?;
self.set_raw_mode(&mut sub)
.map_err(DeviceManagerError::SetPtyRaw)?;
self.config.lock().unwrap().serial.file = Some(path.clone());
self.serial_pty = Some(Arc::new(Mutex::new(PtyPair { main, sub, path })));
}
None
}
ConsoleOutputMode::Tty => Some(Box::new(stdout())),
ConsoleOutputMode::Off | ConsoleOutputMode::Null => None,
};
if serial_config.mode != ConsoleOutputMode::Off {
let serial = self.add_serial_device(interrupt_manager, serial_writer)?;
self.serial_manager = match serial_config.mode {
ConsoleOutputMode::Pty | ConsoleOutputMode::Tty => {
let serial_manager =
SerialManager::new(serial, self.serial_pty.clone(), serial_config.mode)
.map_err(DeviceManagerError::CreateSerialManager)?;
if let Some(mut serial_manager) = serial_manager {
serial_manager
.start_thread(
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::SpawnSerialManager)?;
Some(Arc::new(serial_manager))
} else {
None
}
}
_ => None,
};
}
let console_resizer =
self.add_virtio_console_device(virtio_devices, console_pty, console_resize_pipe)?;
Ok(Arc::new(Console { console_resizer }))
}
fn make_virtio_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices: Vec<MetaVirtioDevice> = Vec::new();
// Create "standard" virtio devices (net/block/rng)
devices.append(&mut self.make_virtio_block_devices()?);
devices.append(&mut self.make_virtio_net_devices()?);
devices.append(&mut self.make_virtio_rng_devices()?);
// Add virtio-fs if required
devices.append(&mut self.make_virtio_fs_devices()?);
// Add virtio-pmem if required
devices.append(&mut self.make_virtio_pmem_devices()?);
// Add virtio-vsock if required
devices.append(&mut self.make_virtio_vsock_devices()?);
devices.append(&mut self.make_virtio_mem_devices()?);
// Add virtio-balloon if required
devices.append(&mut self.make_virtio_balloon_devices()?);
// Add virtio-watchdog device
devices.append(&mut self.make_virtio_watchdog_devices()?);
// Add vDPA devices if required
devices.append(&mut self.make_vdpa_devices()?);
Ok(devices)
}
// Cache whether io_uring is supported to avoid probing for very block device
fn io_uring_is_supported(&mut self) -> bool {
if let Some(supported) = self.io_uring_supported {
return supported;
}
let supported = block_io_uring_is_supported();
self.io_uring_supported = Some(supported);
supported
}
fn make_virtio_block_device(
&mut self,
disk_cfg: &mut DiskConfig,
) -> DeviceManagerResult<MetaVirtioDevice> {
let id = if let Some(id) = &disk_cfg.id {
id.clone()
} else {
let id = self.next_device_name(DISK_DEVICE_NAME_PREFIX)?;
disk_cfg.id = Some(id.clone());
id
};
info!("Creating virtio-block device: {:?}", disk_cfg);
if disk_cfg.vhost_user {
let socket = disk_cfg.vhost_socket.as_ref().unwrap().clone();
let vu_cfg = VhostUserConfig {
socket,
num_queues: disk_cfg.num_queues,
queue_size: disk_cfg.queue_size,
};
let vhost_user_block_device = Arc::new(Mutex::new(
match virtio_devices::vhost_user::Blk::new(
id.clone(),
vu_cfg,
self.restoring,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
self.force_iommu,
) {
Ok(vub_device) => vub_device,
Err(e) => {
return Err(DeviceManagerError::CreateVhostUserBlk(e));
}
},
));
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, vhost_user_block_device));
Ok(MetaVirtioDevice {
virtio_device: Arc::clone(&vhost_user_block_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: false,
id,
pci_segment: disk_cfg.pci_segment,
dma_handler: None,
})
} else {
let mut options = OpenOptions::new();
options.read(true);
options.write(!disk_cfg.readonly);
if disk_cfg.direct {
options.custom_flags(libc::O_DIRECT);
}
// Open block device path
let mut file: File = options
.open(
disk_cfg
.path
.as_ref()
.ok_or(DeviceManagerError::NoDiskPath)?
.clone(),
)
.map_err(DeviceManagerError::Disk)?;
let image_type =
detect_image_type(&mut file).map_err(DeviceManagerError::DetectImageType)?;
let image = match image_type {
ImageType::FixedVhd => {
// Use asynchronous backend relying on io_uring if the
// syscalls are supported.
if self.io_uring_is_supported() && !disk_cfg.disable_io_uring {
info!("Using asynchronous fixed VHD disk file (io_uring)");
Box::new(
FixedVhdDiskAsync::new(file)
.map_err(DeviceManagerError::CreateFixedVhdDiskAsync)?,
) as Box<dyn DiskFile>
} else {
info!("Using synchronous fixed VHD disk file");
Box::new(
FixedVhdDiskSync::new(file)
.map_err(DeviceManagerError::CreateFixedVhdDiskSync)?,
) as Box<dyn DiskFile>
}
}
ImageType::Raw => {
// Use asynchronous backend relying on io_uring if the
// syscalls are supported.
if self.io_uring_is_supported() && !disk_cfg.disable_io_uring {
info!("Using asynchronous RAW disk file (io_uring)");
Box::new(RawFileDisk::new(file)) as Box<dyn DiskFile>
} else {
info!("Using synchronous RAW disk file");
Box::new(RawFileDiskSync::new(file)) as Box<dyn DiskFile>
}
}
ImageType::Qcow2 => {
info!("Using synchronous QCOW disk file");
Box::new(
QcowDiskSync::new(file, disk_cfg.direct)
.map_err(DeviceManagerError::CreateQcowDiskSync)?,
) as Box<dyn DiskFile>
}
ImageType::Vhdx => {
info!("Using synchronous VHDX disk file");
Box::new(
VhdxDiskSync::new(file)
.map_err(DeviceManagerError::CreateFixedVhdxDiskSync)?,
) as Box<dyn DiskFile>
}
};
let dev = Arc::new(Mutex::new(
virtio_devices::Block::new(
id.clone(),
image,
disk_cfg
.path
.as_ref()
.ok_or(DeviceManagerError::NoDiskPath)?
.clone(),
disk_cfg.readonly,
self.force_iommu | disk_cfg.iommu,
disk_cfg.num_queues,
disk_cfg.queue_size,
self.seccomp_action.clone(),
disk_cfg.rate_limiter_config,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioBlock)?,
));
let virtio_device = Arc::clone(&dev) as Arc<Mutex<dyn virtio_devices::VirtioDevice>>;
let migratable_device = dev as Arc<Mutex<dyn Migratable>>;
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, migratable_device));
Ok(MetaVirtioDevice {
virtio_device,
iommu: disk_cfg.iommu,
id,
pci_segment: disk_cfg.pci_segment,
dma_handler: None,
})
}
}
fn make_virtio_block_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
let mut block_devices = self.config.lock().unwrap().disks.clone();
if let Some(disk_list_cfg) = &mut block_devices {
for disk_cfg in disk_list_cfg.iter_mut() {
devices.push(self.make_virtio_block_device(disk_cfg)?);
}
}
self.config.lock().unwrap().disks = block_devices;
Ok(devices)
}
fn make_virtio_net_device(
&mut self,
net_cfg: &mut NetConfig,
) -> DeviceManagerResult<MetaVirtioDevice> {
let id = if let Some(id) = &net_cfg.id {
id.clone()
} else {
let id = self.next_device_name(NET_DEVICE_NAME_PREFIX)?;
net_cfg.id = Some(id.clone());
id
};
info!("Creating virtio-net device: {:?}", net_cfg);
if net_cfg.vhost_user {
let socket = net_cfg.vhost_socket.as_ref().unwrap().clone();
let vu_cfg = VhostUserConfig {
socket,
num_queues: net_cfg.num_queues,
queue_size: net_cfg.queue_size,
};
let server = match net_cfg.vhost_mode {
VhostMode::Client => false,
VhostMode::Server => true,
};
let vhost_user_net_device = Arc::new(Mutex::new(
match virtio_devices::vhost_user::Net::new(
id.clone(),
net_cfg.mac,
vu_cfg,
server,
self.seccomp_action.clone(),
self.restoring,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
self.force_iommu,
) {
Ok(vun_device) => vun_device,
Err(e) => {
return Err(DeviceManagerError::CreateVhostUserNet(e));
}
},
));
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, vhost_user_net_device));
Ok(MetaVirtioDevice {
virtio_device: Arc::clone(&vhost_user_net_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: net_cfg.iommu,
id,
pci_segment: net_cfg.pci_segment,
dma_handler: None,
})
} else {
let virtio_net_device = if let Some(ref tap_if_name) = net_cfg.tap {
Arc::new(Mutex::new(
virtio_devices::Net::new(
id.clone(),
Some(tap_if_name),
None,
None,
Some(net_cfg.mac),
&mut net_cfg.host_mac,
self.force_iommu | net_cfg.iommu,
net_cfg.num_queues,
net_cfg.queue_size,
self.seccomp_action.clone(),
net_cfg.rate_limiter_config,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioNet)?,
))
} else if let Some(fds) = &net_cfg.fds {
Arc::new(Mutex::new(
virtio_devices::Net::from_tap_fds(
id.clone(),
fds,
Some(net_cfg.mac),
self.force_iommu | net_cfg.iommu,
net_cfg.queue_size,
self.seccomp_action.clone(),
net_cfg.rate_limiter_config,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioNet)?,
))
} else {
Arc::new(Mutex::new(
virtio_devices::Net::new(
id.clone(),
None,
Some(net_cfg.ip),
Some(net_cfg.mask),
Some(net_cfg.mac),
&mut net_cfg.host_mac,
self.force_iommu | net_cfg.iommu,
net_cfg.num_queues,
net_cfg.queue_size,
self.seccomp_action.clone(),
net_cfg.rate_limiter_config,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioNet)?,
))
};
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, virtio_net_device));
Ok(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_net_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: net_cfg.iommu,
id,
pci_segment: net_cfg.pci_segment,
dma_handler: None,
})
}
}
/// Add virto-net and vhost-user-net devices
fn make_virtio_net_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
let mut net_devices = self.config.lock().unwrap().net.clone();
if let Some(net_list_cfg) = &mut net_devices {
for net_cfg in net_list_cfg.iter_mut() {
devices.push(self.make_virtio_net_device(net_cfg)?);
}
}
self.config.lock().unwrap().net = net_devices;
Ok(devices)
}
fn make_virtio_rng_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
// Add virtio-rng if required
let rng_config = self.config.lock().unwrap().rng.clone();
if let Some(rng_path) = rng_config.src.to_str() {
info!("Creating virtio-rng device: {:?}", rng_config);
let id = String::from(RNG_DEVICE_NAME);
let virtio_rng_device = Arc::new(Mutex::new(
virtio_devices::Rng::new(
id.clone(),
rng_path,
self.force_iommu | rng_config.iommu,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioRng)?,
));
devices.push(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_rng_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: rng_config.iommu,
id: id.clone(),
pci_segment: 0,
dma_handler: None,
});
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, virtio_rng_device));
}
Ok(devices)
}
fn make_virtio_fs_device(
&mut self,
fs_cfg: &mut FsConfig,
) -> DeviceManagerResult<MetaVirtioDevice> {
let id = if let Some(id) = &fs_cfg.id {
id.clone()
} else {
let id = self.next_device_name(FS_DEVICE_NAME_PREFIX)?;
fs_cfg.id = Some(id.clone());
id
};
info!("Creating virtio-fs device: {:?}", fs_cfg);
let mut node = device_node!(id);
// Look for the id in the device tree. If it can be found, that means
// the device is being restored, otherwise it's created from scratch.
let cache_range = if let Some(node) = self.device_tree.lock().unwrap().get(&id) {
info!("Restoring virtio-fs {} resources", id);
let mut cache_range: Option<(u64, u64)> = None;
for resource in node.resources.iter() {
match resource {
Resource::MmioAddressRange { base, size } => {
if cache_range.is_some() {
return Err(DeviceManagerError::ResourceAlreadyExists);
}
cache_range = Some((*base, *size));
}
_ => {
error!("Unexpected resource {:?} for {}", resource, id);
}
}
}
cache_range
} else {
None
};
// DAX is not supported, we override the config by disabling the option.
fs_cfg.dax = false;
if let Some(fs_socket) = fs_cfg.socket.to_str() {
let cache = if fs_cfg.dax {
let (cache_base, cache_size) = if let Some((base, size)) = cache_range {
// The memory needs to be 2MiB aligned in order to support
// hugepages.
self.pci_segments[fs_cfg.pci_segment as usize]
.allocator
.lock()
.unwrap()
.allocate(
Some(GuestAddress(base)),
size as GuestUsize,
Some(0x0020_0000),
)
.ok_or(DeviceManagerError::FsRangeAllocation)?;
(base, size)
} else {
let size = fs_cfg.cache_size;
// The memory needs to be 2MiB aligned in order to support
// hugepages.
let base = self.pci_segments[fs_cfg.pci_segment as usize]
.allocator
.lock()
.unwrap()
.allocate(None, size as GuestUsize, Some(0x0020_0000))
.ok_or(DeviceManagerError::FsRangeAllocation)?;
(base.raw_value(), size)
};
// Update the node with correct resource information.
node.resources.push(Resource::MmioAddressRange {
base: cache_base,
size: cache_size,
});
let mmap_region = MmapRegion::build(
None,
cache_size as usize,
libc::PROT_NONE,
libc::MAP_ANONYMOUS | libc::MAP_PRIVATE,
)
.map_err(DeviceManagerError::NewMmapRegion)?;
let host_addr: u64 = mmap_region.as_ptr() as u64;
let mem_slot = self
.memory_manager
.lock()
.unwrap()
.create_userspace_mapping(
cache_base, cache_size, host_addr, false, false, false,
)
.map_err(DeviceManagerError::MemoryManager)?;
let region_list = vec![VirtioSharedMemory {
offset: 0,
len: cache_size,
}];
Some((
VirtioSharedMemoryList {
host_addr,
mem_slot,
addr: GuestAddress(cache_base),
len: cache_size as GuestUsize,
region_list,
},
mmap_region,
))
} else {
None
};
let virtio_fs_device = Arc::new(Mutex::new(
virtio_devices::vhost_user::Fs::new(
id.clone(),
fs_socket,
&fs_cfg.tag,
fs_cfg.num_queues,
fs_cfg.queue_size,
cache,
self.seccomp_action.clone(),
self.restoring,
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
self.force_iommu,
)
.map_err(DeviceManagerError::CreateVirtioFs)?,
));
// Update the device tree with the migratable device.
node.migratable = Some(Arc::clone(&virtio_fs_device) as Arc<Mutex<dyn Migratable>>);
self.device_tree.lock().unwrap().insert(id.clone(), node);
Ok(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_fs_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: false,
id,
pci_segment: fs_cfg.pci_segment,
dma_handler: None,
})
} else {
Err(DeviceManagerError::NoVirtioFsSock)
}
}
fn make_virtio_fs_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
let mut fs_devices = self.config.lock().unwrap().fs.clone();
if let Some(fs_list_cfg) = &mut fs_devices {
for fs_cfg in fs_list_cfg.iter_mut() {
devices.push(self.make_virtio_fs_device(fs_cfg)?);
}
}
self.config.lock().unwrap().fs = fs_devices;
Ok(devices)
}
fn make_virtio_pmem_device(
&mut self,
pmem_cfg: &mut PmemConfig,
) -> DeviceManagerResult<MetaVirtioDevice> {
let id = if let Some(id) = &pmem_cfg.id {
id.clone()
} else {
let id = self.next_device_name(PMEM_DEVICE_NAME_PREFIX)?;
pmem_cfg.id = Some(id.clone());
id
};
info!("Creating virtio-pmem device: {:?}", pmem_cfg);
let mut node = device_node!(id);
// Look for the id in the device tree. If it can be found, that means
// the device is being restored, otherwise it's created from scratch.
let region_range = if let Some(node) = self.device_tree.lock().unwrap().get(&id) {
info!("Restoring virtio-pmem {} resources", id);
let mut region_range: Option<(u64, u64)> = None;
for resource in node.resources.iter() {
match resource {
Resource::MmioAddressRange { base, size } => {
if region_range.is_some() {
return Err(DeviceManagerError::ResourceAlreadyExists);
}
region_range = Some((*base, *size));
}
_ => {
error!("Unexpected resource {:?} for {}", resource, id);
}
}
}
if region_range.is_none() {
return Err(DeviceManagerError::MissingVirtioPmemResources);
}
region_range
} else {
None
};
let (custom_flags, set_len) = if pmem_cfg.file.is_dir() {
if pmem_cfg.size.is_none() {
return Err(DeviceManagerError::PmemWithDirectorySizeMissing);
}
(O_TMPFILE, true)
} else {
(0, false)
};
let mut file = OpenOptions::new()
.read(true)
.write(!pmem_cfg.discard_writes)
.custom_flags(custom_flags)
.open(&pmem_cfg.file)
.map_err(DeviceManagerError::PmemFileOpen)?;
let size = if let Some(size) = pmem_cfg.size {
if set_len {
file.set_len(size)
.map_err(DeviceManagerError::PmemFileSetLen)?;
}
size
} else {
file.seek(SeekFrom::End(0))
.map_err(DeviceManagerError::PmemFileSetLen)?
};
if size % 0x20_0000 != 0 {
return Err(DeviceManagerError::PmemSizeNotAligned);
}
let (region_base, region_size) = if let Some((base, size)) = region_range {
// The memory needs to be 2MiB aligned in order to support
// hugepages.
self.pci_segments[pmem_cfg.pci_segment as usize]
.allocator
.lock()
.unwrap()
.allocate(
Some(GuestAddress(base)),
size as GuestUsize,
Some(0x0020_0000),
)
.ok_or(DeviceManagerError::PmemRangeAllocation)?;
(base, size)
} else {
// The memory needs to be 2MiB aligned in order to support
// hugepages.
let base = self.pci_segments[pmem_cfg.pci_segment as usize]
.allocator
.lock()
.unwrap()
.allocate(None, size as GuestUsize, Some(0x0020_0000))
.ok_or(DeviceManagerError::PmemRangeAllocation)?;
(base.raw_value(), size)
};
let cloned_file = file.try_clone().map_err(DeviceManagerError::CloneFile)?;
let mmap_region = MmapRegion::build(
Some(FileOffset::new(cloned_file, 0)),
region_size as usize,
PROT_READ | PROT_WRITE,
MAP_NORESERVE
| if pmem_cfg.discard_writes {
MAP_PRIVATE
} else {
MAP_SHARED
},
)
.map_err(DeviceManagerError::NewMmapRegion)?;
let host_addr: u64 = mmap_region.as_ptr() as u64;
let mem_slot = self
.memory_manager
.lock()
.unwrap()
.create_userspace_mapping(region_base, region_size, host_addr, false, false, false)
.map_err(DeviceManagerError::MemoryManager)?;
let mapping = virtio_devices::UserspaceMapping {
host_addr,
mem_slot,
addr: GuestAddress(region_base),
len: region_size,
mergeable: false,
};
let virtio_pmem_device = Arc::new(Mutex::new(
virtio_devices::Pmem::new(
id.clone(),
file,
GuestAddress(region_base),
mapping,
mmap_region,
self.force_iommu | pmem_cfg.iommu,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioPmem)?,
));
// Update the device tree with correct resource information and with
// the migratable device.
node.resources.push(Resource::MmioAddressRange {
base: region_base,
size: region_size,
});
node.migratable = Some(Arc::clone(&virtio_pmem_device) as Arc<Mutex<dyn Migratable>>);
self.device_tree.lock().unwrap().insert(id.clone(), node);
Ok(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_pmem_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: pmem_cfg.iommu,
id,
pci_segment: pmem_cfg.pci_segment,
dma_handler: None,
})
}
fn make_virtio_pmem_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
// Add virtio-pmem if required
let mut pmem_devices = self.config.lock().unwrap().pmem.clone();
if let Some(pmem_list_cfg) = &mut pmem_devices {
for pmem_cfg in pmem_list_cfg.iter_mut() {
devices.push(self.make_virtio_pmem_device(pmem_cfg)?);
}
}
self.config.lock().unwrap().pmem = pmem_devices;
Ok(devices)
}
fn make_virtio_vsock_device(
&mut self,
vsock_cfg: &mut VsockConfig,
) -> DeviceManagerResult<MetaVirtioDevice> {
let id = if let Some(id) = &vsock_cfg.id {
id.clone()
} else {
let id = self.next_device_name(VSOCK_DEVICE_NAME_PREFIX)?;
vsock_cfg.id = Some(id.clone());
id
};
info!("Creating virtio-vsock device: {:?}", vsock_cfg);
let socket_path = vsock_cfg
.socket
.to_str()
.ok_or(DeviceManagerError::CreateVsockConvertPath)?;
let backend =
virtio_devices::vsock::VsockUnixBackend::new(vsock_cfg.cid, socket_path.to_string())
.map_err(DeviceManagerError::CreateVsockBackend)?;
let vsock_device = Arc::new(Mutex::new(
virtio_devices::Vsock::new(
id.clone(),
vsock_cfg.cid,
vsock_cfg.socket.clone(),
backend,
self.force_iommu | vsock_cfg.iommu,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioVsock)?,
));
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, vsock_device));
Ok(MetaVirtioDevice {
virtio_device: Arc::clone(&vsock_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: vsock_cfg.iommu,
id,
pci_segment: vsock_cfg.pci_segment,
dma_handler: None,
})
}
fn make_virtio_vsock_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
let mut vsock = self.config.lock().unwrap().vsock.clone();
if let Some(ref mut vsock_cfg) = &mut vsock {
devices.push(self.make_virtio_vsock_device(vsock_cfg)?);
}
self.config.lock().unwrap().vsock = vsock;
Ok(devices)
}
fn make_virtio_mem_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
let mm = self.memory_manager.clone();
let mm = mm.lock().unwrap();
for (memory_zone_id, memory_zone) in mm.memory_zones().iter() {
if let Some(virtio_mem_zone) = memory_zone.virtio_mem_zone() {
info!("Creating virtio-mem device: id = {}", memory_zone_id);
let node_id = numa_node_id_from_memory_zone_id(&self.numa_nodes, memory_zone_id)
.map(|i| i as u16);
let virtio_mem_device = Arc::new(Mutex::new(
virtio_devices::Mem::new(
memory_zone_id.clone(),
virtio_mem_zone.region(),
virtio_mem_zone
.resize_handler()
.new_resize_sender()
.map_err(DeviceManagerError::CreateResizeSender)?,
self.seccomp_action.clone(),
node_id,
virtio_mem_zone.hotplugged_size(),
virtio_mem_zone.hugepages(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
virtio_mem_zone.blocks_state().clone(),
)
.map_err(DeviceManagerError::CreateVirtioMem)?,
));
self.virtio_mem_devices.push(Arc::clone(&virtio_mem_device));
devices.push(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_mem_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: false,
id: memory_zone_id.clone(),
pci_segment: 0,
dma_handler: None,
});
// Fill the device tree with a new node. In case of restore, we
// know there is nothing to do, so we can simply override the
// existing entry.
self.device_tree.lock().unwrap().insert(
memory_zone_id.clone(),
device_node!(memory_zone_id, virtio_mem_device),
);
}
}
Ok(devices)
}
fn make_virtio_balloon_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
if let Some(balloon_config) = &self.config.lock().unwrap().balloon {
let id = String::from(BALLOON_DEVICE_NAME);
info!("Creating virtio-balloon device: id = {}", id);
let virtio_balloon_device = Arc::new(Mutex::new(
virtio_devices::Balloon::new(
id.clone(),
balloon_config.size,
balloon_config.deflate_on_oom,
balloon_config.free_page_reporting,
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioBalloon)?,
));
self.balloon = Some(virtio_balloon_device.clone());
devices.push(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_balloon_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: false,
id: id.clone(),
pci_segment: 0,
dma_handler: None,
});
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, virtio_balloon_device));
}
Ok(devices)
}
fn make_virtio_watchdog_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
if !self.config.lock().unwrap().watchdog {
return Ok(devices);
}
let id = String::from(WATCHDOG_DEVICE_NAME);
info!("Creating virtio-watchdog device: id = {}", id);
let virtio_watchdog_device = Arc::new(Mutex::new(
virtio_devices::Watchdog::new(
id.clone(),
self.reset_evt.try_clone().unwrap(),
self.seccomp_action.clone(),
self.exit_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
)
.map_err(DeviceManagerError::CreateVirtioWatchdog)?,
));
devices.push(MetaVirtioDevice {
virtio_device: Arc::clone(&virtio_watchdog_device)
as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: false,
id: id.clone(),
pci_segment: 0,
dma_handler: None,
});
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id, virtio_watchdog_device));
Ok(devices)
}
fn make_vdpa_device(
&mut self,
vdpa_cfg: &mut VdpaConfig,
) -> DeviceManagerResult<MetaVirtioDevice> {
let id = if let Some(id) = &vdpa_cfg.id {
id.clone()
} else {
let id = self.next_device_name(VDPA_DEVICE_NAME_PREFIX)?;
vdpa_cfg.id = Some(id.clone());
id
};
info!("Creating vDPA device: {:?}", vdpa_cfg);
let device_path = vdpa_cfg
.path
.to_str()
.ok_or(DeviceManagerError::CreateVdpaConvertPath)?;
let vdpa_device = Arc::new(Mutex::new(
virtio_devices::Vdpa::new(
id.clone(),
device_path,
self.memory_manager.lock().unwrap().guest_memory(),
vdpa_cfg.num_queues as u16,
)
.map_err(DeviceManagerError::CreateVdpa)?,
));
// Create the DMA handler that is required by the vDPA device
let vdpa_mapping = Arc::new(VdpaDmaMapping::new(
Arc::clone(&vdpa_device),
Arc::new(self.memory_manager.lock().unwrap().guest_memory()),
));
self.device_tree
.lock()
.unwrap()
.insert(id.clone(), device_node!(id));
Ok(MetaVirtioDevice {
virtio_device: vdpa_device as Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu: vdpa_cfg.iommu,
id,
pci_segment: vdpa_cfg.pci_segment,
dma_handler: Some(vdpa_mapping),
})
}
fn make_vdpa_devices(&mut self) -> DeviceManagerResult<Vec<MetaVirtioDevice>> {
let mut devices = Vec::new();
// Add vdpa if required
let mut vdpa_devices = self.config.lock().unwrap().vdpa.clone();
if let Some(vdpa_list_cfg) = &mut vdpa_devices {
for vdpa_cfg in vdpa_list_cfg.iter_mut() {
devices.push(self.make_vdpa_device(vdpa_cfg)?);
}
}
self.config.lock().unwrap().vdpa = vdpa_devices;
Ok(devices)
}
fn next_device_name(&mut self, prefix: &str) -> DeviceManagerResult<String> {
let start_id = self.device_id_cnt;
loop {
// Generate the temporary name.
let name = format!("{}{}", prefix, self.device_id_cnt);
// Increment the counter.
self.device_id_cnt += Wrapping(1);
// Check if the name is already in use.
if !self.device_tree.lock().unwrap().contains_key(&name) {
return Ok(name);
}
if self.device_id_cnt == start_id {
// We went through a full loop and there's nothing else we can
// do.
break;
}
}
Err(DeviceManagerError::NoAvailableDeviceName)
}
fn add_passthrough_device(
&mut self,
device_cfg: &mut DeviceConfig,
) -> DeviceManagerResult<(PciBdf, String)> {
// If the passthrough device has not been created yet, it is created
// here and stored in the DeviceManager structure for future needs.
if self.passthrough_device.is_none() {
self.passthrough_device = Some(
self.address_manager
.vm
.create_passthrough_device()
.map_err(|e| DeviceManagerError::CreatePassthroughDevice(e.into()))?,
);
}
self.add_vfio_device(device_cfg)
}
fn create_vfio_container(&self) -> DeviceManagerResult<Arc<VfioContainer>> {
let passthrough_device = self
.passthrough_device
.as_ref()
.ok_or(DeviceManagerError::NoDevicePassthroughSupport)?;
// Safe because we know the RawFd is valid.
//
// This dup() is mandatory to be able to give full ownership of the
// file descriptor to the DeviceFd::from_raw_fd() function later in
// the code.
//
// This is particularly needed so that VfioContainer will still have
// a valid file descriptor even if DeviceManager, and therefore the
// passthrough_device are dropped. In case of Drop, the file descriptor
// would be closed, but Linux would still have the duplicated file
// descriptor opened from DeviceFd, preventing from unexpected behavior
// where the VfioContainer would try to use a closed file descriptor.
let dup_device_fd = unsafe { libc::dup(passthrough_device.as_raw_fd()) };
if dup_device_fd == -1 {
return vmm_sys_util::errno::errno_result().map_err(DeviceManagerError::DupFd);
}
// SAFETY the raw fd conversion here is safe because:
// 1. When running on KVM or MSHV, passthrough_device wraps around DeviceFd.
// 2. The conversion here extracts the raw fd and then turns the raw fd into a DeviceFd
// of the same (correct) type.
Ok(Arc::new(
VfioContainer::new(Arc::new(unsafe { DeviceFd::from_raw_fd(dup_device_fd) }))
.map_err(DeviceManagerError::VfioCreate)?,
))
}
fn add_vfio_device(
&mut self,
device_cfg: &mut DeviceConfig,
) -> DeviceManagerResult<(PciBdf, String)> {
let pci_segment_id = device_cfg.pci_segment;
let pci_device_bdf = self.pci_segments[pci_segment_id as usize].next_device_bdf()?;
let mut needs_dma_mapping = false;
// Here we create a new VFIO container for two reasons. Either this is
// the first VFIO device, meaning we need a new VFIO container, which
// will be shared with other VFIO devices. Or the new VFIO device is
// attached to a vIOMMU, meaning we must create a dedicated VFIO
// container. In the vIOMMU use case, we can't let all devices under
// the same VFIO container since we couldn't map/unmap memory for each
// device. That's simply because the map/unmap operations happen at the
// VFIO container level.
let vfio_container = if device_cfg.iommu {
let vfio_container = self.create_vfio_container()?;
let vfio_mapping = Arc::new(VfioDmaMapping::new(
Arc::clone(&vfio_container),
Arc::new(self.memory_manager.lock().unwrap().guest_memory()),
));
if let Some(iommu) = &self.iommu_device {
iommu
.lock()
.unwrap()
.add_external_mapping(pci_device_bdf.into(), vfio_mapping);
} else {
return Err(DeviceManagerError::MissingVirtualIommu);
}
vfio_container
} else if let Some(vfio_container) = &self.vfio_container {
Arc::clone(vfio_container)
} else {
let vfio_container = self.create_vfio_container()?;
needs_dma_mapping = true;
self.vfio_container = Some(Arc::clone(&vfio_container));
vfio_container
};
let vfio_device = VfioDevice::new(&device_cfg.path, Arc::clone(&vfio_container))
.map_err(DeviceManagerError::VfioCreate)?;
if needs_dma_mapping {
// Register DMA mapping in IOMMU.
// Do not register virtio-mem regions, as they are handled directly by
// virtio-mem device itself.
for (_, zone) in self.memory_manager.lock().unwrap().memory_zones().iter() {
for region in zone.regions() {
vfio_container
.vfio_dma_map(
region.start_addr().raw_value(),
region.len() as u64,
region.as_ptr() as u64,
)
.map_err(DeviceManagerError::VfioDmaMap)?;
}
}
let vfio_mapping = Arc::new(VfioDmaMapping::new(
Arc::clone(&vfio_container),
Arc::new(self.memory_manager.lock().unwrap().guest_memory()),
));
for virtio_mem_device in self.virtio_mem_devices.iter() {
virtio_mem_device
.lock()
.unwrap()
.add_dma_mapping_handler(
VirtioMemMappingSource::Container,
vfio_mapping.clone(),
)
.map_err(DeviceManagerError::AddDmaMappingHandlerVirtioMem)?;
}
}
let legacy_interrupt_group =
if let Some(legacy_interrupt_manager) = &self.legacy_interrupt_manager {
Some(
legacy_interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: self.pci_segments[pci_segment_id as usize].pci_irq_slots
[pci_device_bdf.device() as usize]
as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?,
)
} else {
None
};
let vfio_pci_device = VfioPciDevice::new(
&self.address_manager.vm,
vfio_device,
vfio_container,
&self.msi_interrupt_manager,
legacy_interrupt_group,
device_cfg.iommu,
pci_device_bdf,
)
.map_err(DeviceManagerError::VfioPciCreate)?;
let vfio_name = if let Some(id) = &device_cfg.id {
if self.device_tree.lock().unwrap().contains_key(id) {
return Err(DeviceManagerError::DeviceIdAlreadyInUse);
}
id.clone()
} else {
let id = self.next_device_name(VFIO_DEVICE_NAME_PREFIX)?;
device_cfg.id = Some(id.clone());
id
};
let vfio_pci_device = Arc::new(Mutex::new(vfio_pci_device));
self.add_pci_device(
vfio_pci_device.clone(),
vfio_pci_device.clone(),
pci_segment_id,
pci_device_bdf,
)?;
vfio_pci_device
.lock()
.unwrap()
.map_mmio_regions(&self.address_manager.vm, || {
self.memory_manager.lock().unwrap().allocate_memory_slot()
})
.map_err(DeviceManagerError::VfioMapRegion)?;
let mut node = device_node!(vfio_name);
for region in vfio_pci_device.lock().unwrap().mmio_regions() {
node.resources.push(Resource::MmioAddressRange {
base: region.start.0,
size: region.length as u64,
});
}
node.pci_bdf = Some(pci_device_bdf);
node.pci_device_handle = Some(PciDeviceHandle::Vfio(vfio_pci_device));
self.device_tree
.lock()
.unwrap()
.insert(vfio_name.clone(), node);
Ok((pci_device_bdf, vfio_name))
}
fn add_pci_device(
&mut self,
bus_device: Arc<Mutex<dyn BusDevice>>,
pci_device: Arc<Mutex<dyn PciDevice>>,
segment_id: u16,
bdf: PciBdf,
) -> DeviceManagerResult<Vec<(GuestAddress, GuestUsize, PciBarRegionType)>> {
let bars = pci_device
.lock()
.unwrap()
.allocate_bars(
&self.address_manager.allocator,
&mut self.pci_segments[segment_id as usize]
.allocator
.lock()
.unwrap(),
)
.map_err(DeviceManagerError::AllocateBars)?;
let mut pci_bus = self.pci_segments[segment_id as usize]
.pci_bus
.lock()
.unwrap();
pci_bus
.add_device(bdf.device() as u32, pci_device)
.map_err(DeviceManagerError::AddPciDevice)?;
self.bus_devices.push(Arc::clone(&bus_device));
pci_bus
.register_mapping(
bus_device,
#[cfg(target_arch = "x86_64")]
self.address_manager.io_bus.as_ref(),
self.address_manager.mmio_bus.as_ref(),
bars.clone(),
)
.map_err(DeviceManagerError::AddPciDevice)?;
Ok(bars)
}
fn add_vfio_devices(&mut self) -> DeviceManagerResult<Vec<PciBdf>> {
let mut iommu_attached_device_ids = Vec::new();
let mut devices = self.config.lock().unwrap().devices.clone();
if let Some(device_list_cfg) = &mut devices {
for device_cfg in device_list_cfg.iter_mut() {
let (device_id, _) = self.add_passthrough_device(device_cfg)?;
if device_cfg.iommu && self.iommu_device.is_some() {
iommu_attached_device_ids.push(device_id);
}
}
}
// Update the list of devices
self.config.lock().unwrap().devices = devices;
Ok(iommu_attached_device_ids)
}
fn add_vfio_user_device(
&mut self,
device_cfg: &mut UserDeviceConfig,
) -> DeviceManagerResult<(PciBdf, String)> {
let pci_segment_id = device_cfg.pci_segment;
let pci_device_bdf = self.pci_segments[pci_segment_id as usize].next_device_bdf()?;
let legacy_interrupt_group =
if let Some(legacy_interrupt_manager) = &self.legacy_interrupt_manager {
Some(
legacy_interrupt_manager
.create_group(LegacyIrqGroupConfig {
irq: self.pci_segments[pci_segment_id as usize].pci_irq_slots
[pci_device_bdf.device() as usize]
as InterruptIndex,
})
.map_err(DeviceManagerError::CreateInterruptGroup)?,
)
} else {
None
};
let client = Arc::new(Mutex::new(
vfio_user::Client::new(&device_cfg.socket)
.map_err(DeviceManagerError::VfioUserCreateClient)?,
));
let mut vfio_user_pci_device = VfioUserPciDevice::new(
&self.address_manager.vm,
client.clone(),
&self.msi_interrupt_manager,
legacy_interrupt_group,
pci_device_bdf,
)
.map_err(DeviceManagerError::VfioUserCreate)?;
vfio_user_pci_device
.map_mmio_regions(&self.address_manager.vm, || {
self.memory_manager.lock().unwrap().allocate_memory_slot()
})
.map_err(DeviceManagerError::VfioUserMapRegion)?;
let memory = self.memory_manager.lock().unwrap().guest_memory();
let vfio_user_mapping = Arc::new(VfioUserDmaMapping::new(client, Arc::new(memory)));
for virtio_mem_device in self.virtio_mem_devices.iter() {
virtio_mem_device
.lock()
.unwrap()
.add_dma_mapping_handler(
VirtioMemMappingSource::Device(pci_device_bdf.into()),
vfio_user_mapping.clone(),
)
.map_err(DeviceManagerError::AddDmaMappingHandlerVirtioMem)?;
}
for (_, zone) in self.memory_manager.lock().unwrap().memory_zones().iter() {
for region in zone.regions() {
vfio_user_pci_device
.dma_map(region)
.map_err(DeviceManagerError::VfioUserDmaMap)?;
}
}
let vfio_user_pci_device = Arc::new(Mutex::new(vfio_user_pci_device));
let vfio_user_name = if let Some(id) = &device_cfg.id {
if self.device_tree.lock().unwrap().contains_key(id) {
return Err(DeviceManagerError::DeviceIdAlreadyInUse);
}
id.clone()
} else {
let id = self.next_device_name(VFIO_USER_DEVICE_NAME_PREFIX)?;
device_cfg.id = Some(id.clone());
id
};
self.add_pci_device(
vfio_user_pci_device.clone(),
vfio_user_pci_device.clone(),
pci_segment_id,
pci_device_bdf,
)?;
let mut node = device_node!(vfio_user_name);
node.pci_bdf = Some(pci_device_bdf);
node.pci_device_handle = Some(PciDeviceHandle::VfioUser(vfio_user_pci_device));
self.device_tree
.lock()
.unwrap()
.insert(vfio_user_name.clone(), node);
Ok((pci_device_bdf, vfio_user_name))
}
fn add_user_devices(&mut self) -> DeviceManagerResult<Vec<PciBdf>> {
let mut user_devices = self.config.lock().unwrap().user_devices.clone();
if let Some(device_list_cfg) = &mut user_devices {
for device_cfg in device_list_cfg.iter_mut() {
let (_device_id, _id) = self.add_vfio_user_device(device_cfg)?;
}
}
// Update the list of devices
self.config.lock().unwrap().user_devices = user_devices;
Ok(vec![])
}
fn add_virtio_pci_device(
&mut self,
virtio_device: Arc<Mutex<dyn virtio_devices::VirtioDevice>>,
iommu_mapping: &Option<Arc<IommuMapping>>,
virtio_device_id: String,
pci_segment_id: u16,
dma_handler: Option<Arc<dyn ExternalDmaMapping>>,
) -> DeviceManagerResult<PciBdf> {
let id = format!("{}-{}", VIRTIO_PCI_DEVICE_NAME_PREFIX, virtio_device_id);
// Add the new virtio-pci node to the device tree.
let mut node = device_node!(id);
node.children = vec![virtio_device_id.clone()];
// Look for the id in the device tree. If it can be found, that means
// the device is being restored, otherwise it's created from scratch.
let (pci_segment_id, pci_device_bdf, config_bar_addr) = if let Some(node) =
self.device_tree.lock().unwrap().get(&id)
{
info!("Restoring virtio-pci {} resources", id);
let pci_device_bdf: PciBdf = node
.pci_bdf
.ok_or(DeviceManagerError::MissingDeviceNodePciBdf)?;
let pci_segment_id = pci_device_bdf.segment();
self.pci_segments[pci_segment_id as usize]
.pci_bus
.lock()
.unwrap()
.get_device_id(pci_device_bdf.device() as usize)
.map_err(DeviceManagerError::GetPciDeviceId)?;
if node.resources.is_empty() {
return Err(DeviceManagerError::MissingVirtioPciResources);
}
// We know the configuration BAR address is stored on the first
// resource in the list.
let config_bar_addr = match node.resources[0] {
Resource::MmioAddressRange { base, .. } => Some(base),
_ => {
error!("Unexpected resource {:?} for {}", node.resources[0], id);
return Err(DeviceManagerError::MissingVirtioPciResources);
}
};
(pci_segment_id, pci_device_bdf, config_bar_addr)
} else {
let pci_device_bdf = self.pci_segments[pci_segment_id as usize].next_device_bdf()?;
(pci_segment_id, pci_device_bdf, None)
};
// Update the existing virtio node by setting the parent.
if let Some(node) = self.device_tree.lock().unwrap().get_mut(&virtio_device_id) {
node.parent = Some(id.clone());
} else {
return Err(DeviceManagerError::MissingNode);
}
// Allows support for one MSI-X vector per queue. It also adds 1
// as we need to take into account the dedicated vector to notify
// about a virtio config change.
let msix_num = (virtio_device.lock().unwrap().queue_max_sizes().len() + 1) as u16;
// Create the AccessPlatform trait from the implementation IommuMapping.
// This will provide address translation for any virtio device sitting
// behind a vIOMMU.
let access_platform: Option<Arc<dyn AccessPlatform>> = if let Some(mapping) = iommu_mapping
{
Some(Arc::new(AccessPlatformMapping::new(
pci_device_bdf.into(),
mapping.clone(),
)))
} else {
None
};
let memory = self.memory_manager.lock().unwrap().guest_memory();
// Map DMA ranges if a DMA handler is available and if the device is
// not attached to a virtual IOMMU.
if let Some(dma_handler) = &dma_handler {
if iommu_mapping.is_some() {
if let Some(iommu) = &self.iommu_device {
iommu
.lock()
.unwrap()
.add_external_mapping(pci_device_bdf.into(), dma_handler.clone());
} else {
return Err(DeviceManagerError::MissingVirtualIommu);
}
} else {
// Let every virtio-mem device handle the DMA map/unmap through the
// DMA handler provided.
for virtio_mem_device in self.virtio_mem_devices.iter() {
virtio_mem_device
.lock()
.unwrap()
.add_dma_mapping_handler(
VirtioMemMappingSource::Device(pci_device_bdf.into()),
dma_handler.clone(),
)
.map_err(DeviceManagerError::AddDmaMappingHandlerVirtioMem)?;
}
// Do not register virtio-mem regions, as they are handled directly by
// virtio-mem devices.
for (_, zone) in self.memory_manager.lock().unwrap().memory_zones().iter() {
for region in zone.regions() {
let gpa = region.start_addr().0;
let size = region.len();
dma_handler
.map(gpa, gpa, size)
.map_err(DeviceManagerError::VirtioDmaMap)?;
}
}
}
}
let device_type = virtio_device.lock().unwrap().device_type();
let mut virtio_pci_device = VirtioPciDevice::new(
id.clone(),
memory,
virtio_device,
msix_num,
access_platform,
&self.msi_interrupt_manager,
pci_device_bdf.into(),
self.activate_evt
.try_clone()
.map_err(DeviceManagerError::EventFd)?,
// All device types *except* virtio block devices should be allocated a 64-bit bar
// The block devices should be given a 32-bit BAR so that they are easily accessible
// to firmware without requiring excessive identity mapping.
// The exception being if not on the default PCI segment.
pci_segment_id > 0 || device_type != VirtioDeviceType::Block as u32,
dma_handler,
)
.map_err(DeviceManagerError::VirtioDevice)?;
// This is important as this will set the BAR address if it exists,
// which is mandatory on the restore path.
if let Some(addr) = config_bar_addr {
virtio_pci_device.set_config_bar_addr(addr);
}
let virtio_pci_device = Arc::new(Mutex::new(virtio_pci_device));
let bars = self.add_pci_device(
virtio_pci_device.clone(),
virtio_pci_device.clone(),
pci_segment_id,
pci_device_bdf,
)?;
let bar_addr = virtio_pci_device.lock().unwrap().config_bar_addr();
for (event, addr) in virtio_pci_device.lock().unwrap().ioeventfds(bar_addr) {
let io_addr = IoEventAddress::Mmio(addr);
self.address_manager
.vm
.register_ioevent(event, &io_addr, None)
.map_err(|e| DeviceManagerError::RegisterIoevent(e.into()))?;
}
// Update the device tree with correct resource information.
for pci_bar in bars.iter() {
node.resources.push(Resource::MmioAddressRange {
base: pci_bar.0.raw_value(),
size: pci_bar.1 as u64,
});
}
node.migratable = Some(Arc::clone(&virtio_pci_device) as Arc<Mutex<dyn Migratable>>);
node.pci_bdf = Some(pci_device_bdf);
node.pci_device_handle = Some(PciDeviceHandle::Virtio(virtio_pci_device));
self.device_tree.lock().unwrap().insert(id, node);
Ok(pci_device_bdf)
}
#[cfg(target_arch = "x86_64")]
pub fn io_bus(&self) -> &Arc<Bus> {
&self.address_manager.io_bus
}
pub fn mmio_bus(&self) -> &Arc<Bus> {
&self.address_manager.mmio_bus
}
pub fn allocator(&self) -> &Arc<Mutex<SystemAllocator>> {
&self.address_manager.allocator
}
pub fn interrupt_controller(&self) -> Option<Arc<Mutex<dyn InterruptController>>> {
self.interrupt_controller
.as_ref()
.map(|ic| ic.clone() as Arc<Mutex<dyn InterruptController>>)
}
#[cfg(target_arch = "x86_64")]
// Used to provide a fast path for handling PIO exits
pub fn pci_config_io(&self) -> Arc<Mutex<PciConfigIo>> {
Arc::clone(self.pci_segments[0].pci_config_io.as_ref().unwrap())
}
pub(crate) fn pci_segments(&self) -> &Vec<PciSegment> {
&self.pci_segments
}
pub fn console(&self) -> &Arc<Console> {
&self.console
}
pub fn cmdline_additions(&self) -> &[String] {
self.cmdline_additions.as_slice()
}
pub fn update_memory(&self, new_region: &Arc<GuestRegionMmap>) -> DeviceManagerResult<()> {
for handle in self.virtio_devices.iter() {
handle
.virtio_device
.lock()
.unwrap()
.add_memory_region(new_region)
.map_err(DeviceManagerError::UpdateMemoryForVirtioDevice)?;
if let Some(dma_handler) = &handle.dma_handler {
if !handle.iommu {
let gpa = new_region.start_addr().0;
let size = new_region.len();
dma_handler
.map(gpa, gpa, size)
.map_err(DeviceManagerError::VirtioDmaMap)?;
}
}
}
// Take care of updating the memory for VFIO PCI devices.
if let Some(vfio_container) = &self.vfio_container {
vfio_container
.vfio_dma_map(
new_region.start_addr().raw_value(),
new_region.len() as u64,
new_region.as_ptr() as u64,
)
.map_err(DeviceManagerError::UpdateMemoryForVfioPciDevice)?;
}
// Take care of updating the memory for vfio-user devices.
{
let device_tree = self.device_tree.lock().unwrap();
for pci_device_node in device_tree.pci_devices() {
if let PciDeviceHandle::VfioUser(vfio_user_pci_device) = pci_device_node
.pci_device_handle
.as_ref()
.ok_or(DeviceManagerError::MissingPciDevice)?
{
vfio_user_pci_device
.lock()
.unwrap()
.dma_map(new_region)
.map_err(DeviceManagerError::UpdateMemoryForVfioUserPciDevice)?;
}
}
}
Ok(())
}
pub fn activate_virtio_devices(&self) -> DeviceManagerResult<()> {
// Find virtio pci devices and activate any pending ones
let device_tree = self.device_tree.lock().unwrap();
for pci_device_node in device_tree.pci_devices() {
#[allow(irrefutable_let_patterns)]
if let PciDeviceHandle::Virtio(virtio_pci_device) = &pci_device_node
.pci_device_handle
.as_ref()
.ok_or(DeviceManagerError::MissingPciDevice)?
{
virtio_pci_device.lock().unwrap().maybe_activate();
}
}
Ok(())
}
pub fn notify_hotplug(
&self,
_notification_type: AcpiNotificationFlags,
) -> DeviceManagerResult<()> {
return self
.ged_notification_device
.as_ref()
.unwrap()
.lock()
.unwrap()
.notify(_notification_type)
.map_err(DeviceManagerError::HotPlugNotification);
}
pub fn add_device(
&mut self,
device_cfg: &mut DeviceConfig,
) -> DeviceManagerResult<PciDeviceInfo> {
if device_cfg.iommu && !self.is_iommu_segment(device_cfg.pci_segment) {
return Err(DeviceManagerError::InvalidIommuHotplug);
}
let (bdf, device_name) = self.add_passthrough_device(device_cfg)?;
// Update the PCIU bitmap
self.pci_segments[device_cfg.pci_segment as usize].pci_devices_up |= 1 << bdf.device();
Ok(PciDeviceInfo {
id: device_name,
bdf,
})
}
pub fn add_user_device(
&mut self,
device_cfg: &mut UserDeviceConfig,
) -> DeviceManagerResult<PciDeviceInfo> {
let (bdf, device_name) = self.add_vfio_user_device(device_cfg)?;
// Update the PCIU bitmap
self.pci_segments[device_cfg.pci_segment as usize].pci_devices_up |= 1 << bdf.device();
Ok(PciDeviceInfo {
id: device_name,
bdf,
})
}
pub fn remove_device(&mut self, id: String) -> DeviceManagerResult<()> {
// The node can be directly a PCI node in case the 'id' refers to a
// VFIO device or a virtio-pci one.
// In case the 'id' refers to a virtio device, we must find the PCI
// node by looking at the parent.
let device_tree = self.device_tree.lock().unwrap();
let node = device_tree
.get(&id)
.ok_or(DeviceManagerError::UnknownDeviceId(id))?;
let pci_device_node = if node.pci_bdf.is_some() && node.pci_device_handle.is_some() {
node
} else {
let parent = node
.parent
.as_ref()
.ok_or(DeviceManagerError::MissingNode)?;
device_tree
.get(parent)
.ok_or(DeviceManagerError::MissingNode)?
};
let pci_device_bdf: PciBdf = pci_device_node
.pci_bdf
.ok_or(DeviceManagerError::MissingDeviceNodePciBdf)?;
let pci_segment_id = pci_device_bdf.segment();
let pci_device_handle = pci_device_node
.pci_device_handle
.as_ref()
.ok_or(DeviceManagerError::MissingPciDevice)?;
#[allow(irrefutable_let_patterns)]
if let PciDeviceHandle::Virtio(virtio_pci_device) = pci_device_handle {
let device_type = VirtioDeviceType::from(
virtio_pci_device
.lock()
.unwrap()
.virtio_device()
.lock()
.unwrap()
.device_type(),
);
match device_type {
VirtioDeviceType::Net
| VirtioDeviceType::Block
| VirtioDeviceType::Pmem
| VirtioDeviceType::Fs
| VirtioDeviceType::Vsock => {}
_ => return Err(DeviceManagerError::RemovalNotAllowed(device_type)),
}
}
// Update the PCID bitmap
self.pci_segments[pci_segment_id as usize].pci_devices_down |= 1 << pci_device_bdf.device();
Ok(())
}
pub fn eject_device(&mut self, pci_segment_id: u16, device_id: u8) -> DeviceManagerResult<()> {
info!(
"Ejecting device_id = {} on segment_id={}",
device_id, pci_segment_id
);
// Convert the device ID into the corresponding b/d/f.
let pci_device_bdf = PciBdf::new(pci_segment_id, 0, device_id, 0);
// Give the PCI device ID back to the PCI bus.
self.pci_segments[pci_segment_id as usize]
.pci_bus
.lock()
.unwrap()
.put_device_id(device_id as usize)
.map_err(DeviceManagerError::PutPciDeviceId)?;
// Remove the device from the device tree along with its children.
let mut device_tree = self.device_tree.lock().unwrap();
let pci_device_node = device_tree
.remove_node_by_pci_bdf(pci_device_bdf)
.ok_or(DeviceManagerError::MissingPciDevice)?;
for child in pci_device_node.children.iter() {
device_tree.remove(child);
}
let mut iommu_attached = false;
if let Some((_, iommu_attached_devices)) = &self.iommu_attached_devices {
if iommu_attached_devices.contains(&pci_device_bdf) {
iommu_attached = true;
}
}
let pci_device_handle = pci_device_node
.pci_device_handle
.ok_or(DeviceManagerError::MissingPciDevice)?;
let (pci_device, bus_device, virtio_device, remove_dma_handler) = match pci_device_handle {
// No need to remove any virtio-mem mapping here as the container outlives all devices
PciDeviceHandle::Vfio(vfio_pci_device) => (
Arc::clone(&vfio_pci_device) as Arc<Mutex<dyn PciDevice>>,
Arc::clone(&vfio_pci_device) as Arc<Mutex<dyn BusDevice>>,
None as Option<Arc<Mutex<dyn virtio_devices::VirtioDevice>>>,
false,
),
PciDeviceHandle::Virtio(virtio_pci_device) => {
let dev = virtio_pci_device.lock().unwrap();
let bar_addr = dev.config_bar_addr();
for (event, addr) in dev.ioeventfds(bar_addr) {
let io_addr = IoEventAddress::Mmio(addr);
self.address_manager
.vm
.unregister_ioevent(event, &io_addr)
.map_err(|e| DeviceManagerError::UnRegisterIoevent(e.into()))?;
}
if let Some(dma_handler) = dev.dma_handler() {
if !iommu_attached {
for (_, zone) in self.memory_manager.lock().unwrap().memory_zones().iter() {
for region in zone.regions() {
let iova = region.start_addr().0;
let size = region.len();
dma_handler
.unmap(iova, size)
.map_err(DeviceManagerError::VirtioDmaUnmap)?;
}
}
}
}
(
Arc::clone(&virtio_pci_device) as Arc<Mutex<dyn PciDevice>>,
Arc::clone(&virtio_pci_device) as Arc<Mutex<dyn BusDevice>>,
Some(dev.virtio_device()),
dev.dma_handler().is_some() && !iommu_attached,
)
}
PciDeviceHandle::VfioUser(vfio_user_pci_device) => {
let mut dev = vfio_user_pci_device.lock().unwrap();
for (_, zone) in self.memory_manager.lock().unwrap().memory_zones().iter() {
for region in zone.regions() {
dev.dma_unmap(region)
.map_err(DeviceManagerError::VfioUserDmaUnmap)?;
}
}
(
Arc::clone(&vfio_user_pci_device) as Arc<Mutex<dyn PciDevice>>,
Arc::clone(&vfio_user_pci_device) as Arc<Mutex<dyn BusDevice>>,
None as Option<Arc<Mutex<dyn virtio_devices::VirtioDevice>>>,
true,
)
}
};
if remove_dma_handler {
for virtio_mem_device in self.virtio_mem_devices.iter() {
virtio_mem_device
.lock()
.unwrap()
.remove_dma_mapping_handler(VirtioMemMappingSource::Device(
pci_device_bdf.into(),
))
.map_err(DeviceManagerError::RemoveDmaMappingHandlerVirtioMem)?;
}
}
// Free the allocated BARs
pci_device
.lock()
.unwrap()
.free_bars(
&mut self.address_manager.allocator.lock().unwrap(),
&mut self.pci_segments[pci_segment_id as usize]
.allocator
.lock()
.unwrap(),
)
.map_err(DeviceManagerError::FreePciBars)?;
// Remove the device from the PCI bus
self.pci_segments[pci_segment_id as usize]
.pci_bus
.lock()
.unwrap()
.remove_by_device(&pci_device)
.map_err(DeviceManagerError::RemoveDeviceFromPciBus)?;
#[cfg(target_arch = "x86_64")]
// Remove the device from the IO bus
self.io_bus()
.remove_by_device(&bus_device)
.map_err(DeviceManagerError::RemoveDeviceFromIoBus)?;
// Remove the device from the MMIO bus
self.mmio_bus()
.remove_by_device(&bus_device)
.map_err(DeviceManagerError::RemoveDeviceFromMmioBus)?;
// Remove the device from the list of BusDevice held by the
// DeviceManager.
self.bus_devices
.retain(|dev| !Arc::ptr_eq(dev, &bus_device));
// Shutdown and remove the underlying virtio-device if present
if let Some(virtio_device) = virtio_device {
for mapping in virtio_device.lock().unwrap().userspace_mappings() {
self.memory_manager
.lock()
.unwrap()
.remove_userspace_mapping(
mapping.addr.raw_value(),
mapping.len,
mapping.host_addr,
mapping.mergeable,
mapping.mem_slot,
)
.map_err(DeviceManagerError::MemoryManager)?;
}
virtio_device.lock().unwrap().shutdown();
self.virtio_devices
.retain(|handler| !Arc::ptr_eq(&handler.virtio_device, &virtio_device));
}
// At this point, the device has been removed from all the list and
// buses where it was stored. At the end of this function, after
// any_device, bus_device and pci_device are released, the actual
// device will be dropped.
Ok(())
}
fn hotplug_virtio_pci_device(
&mut self,
handle: MetaVirtioDevice,
) -> DeviceManagerResult<PciDeviceInfo> {
// Add the virtio device to the device manager list. This is important
// as the list is used to notify virtio devices about memory updates
// for instance.
self.virtio_devices.push(handle.clone());
let mapping: Option<Arc<IommuMapping>> = if handle.iommu {
self.iommu_mapping.clone()
} else {
None
};
let bdf = self.add_virtio_pci_device(
handle.virtio_device,
&mapping,
handle.id.clone(),
handle.pci_segment,
handle.dma_handler,
)?;
// Update the PCIU bitmap
self.pci_segments[handle.pci_segment as usize].pci_devices_up |= 1 << bdf.device();
Ok(PciDeviceInfo { id: handle.id, bdf })
}
fn is_iommu_segment(&self, pci_segment_id: u16) -> bool {
self.config
.lock()
.as_ref()
.unwrap()
.platform
.as_ref()
.map(|pc| {
pc.iommu_segments
.as_ref()
.map(|v| v.contains(&pci_segment_id))
.unwrap_or_default()
})
.unwrap_or_default()
}
pub fn add_disk(&mut self, disk_cfg: &mut DiskConfig) -> DeviceManagerResult<PciDeviceInfo> {
if disk_cfg.iommu && !self.is_iommu_segment(disk_cfg.pci_segment) {
return Err(DeviceManagerError::InvalidIommuHotplug);
}
let device = self.make_virtio_block_device(disk_cfg)?;
self.hotplug_virtio_pci_device(device)
}
pub fn add_fs(&mut self, fs_cfg: &mut FsConfig) -> DeviceManagerResult<PciDeviceInfo> {
let device = self.make_virtio_fs_device(fs_cfg)?;
self.hotplug_virtio_pci_device(device)
}
pub fn add_pmem(&mut self, pmem_cfg: &mut PmemConfig) -> DeviceManagerResult<PciDeviceInfo> {
if pmem_cfg.iommu && !self.is_iommu_segment(pmem_cfg.pci_segment) {
return Err(DeviceManagerError::InvalidIommuHotplug);
}
let device = self.make_virtio_pmem_device(pmem_cfg)?;
self.hotplug_virtio_pci_device(device)
}
pub fn add_net(&mut self, net_cfg: &mut NetConfig) -> DeviceManagerResult<PciDeviceInfo> {
if net_cfg.iommu && !self.is_iommu_segment(net_cfg.pci_segment) {
return Err(DeviceManagerError::InvalidIommuHotplug);
}
let device = self.make_virtio_net_device(net_cfg)?;
self.hotplug_virtio_pci_device(device)
}
pub fn add_vdpa(&mut self, vdpa_cfg: &mut VdpaConfig) -> DeviceManagerResult<PciDeviceInfo> {
if vdpa_cfg.iommu && !self.is_iommu_segment(vdpa_cfg.pci_segment) {
return Err(DeviceManagerError::InvalidIommuHotplug);
}
let device = self.make_vdpa_device(vdpa_cfg)?;
self.hotplug_virtio_pci_device(device)
}
pub fn add_vsock(&mut self, vsock_cfg: &mut VsockConfig) -> DeviceManagerResult<PciDeviceInfo> {
if vsock_cfg.iommu && !self.is_iommu_segment(vsock_cfg.pci_segment) {
return Err(DeviceManagerError::InvalidIommuHotplug);
}
let device = self.make_virtio_vsock_device(vsock_cfg)?;
self.hotplug_virtio_pci_device(device)
}
pub fn counters(&self) -> HashMap<String, HashMap<&'static str, Wrapping<u64>>> {
let mut counters = HashMap::new();
for handle in &self.virtio_devices {
let virtio_device = handle.virtio_device.lock().unwrap();
if let Some(device_counters) = virtio_device.counters() {
counters.insert(handle.id.clone(), device_counters.clone());
}
}
counters
}
pub fn resize_balloon(&mut self, size: u64) -> DeviceManagerResult<()> {
if let Some(balloon) = &self.balloon {
return balloon
.lock()
.unwrap()
.resize(size)
.map_err(DeviceManagerError::VirtioBalloonResize);
}
warn!("No balloon setup: Can't resize the balloon");
Err(DeviceManagerError::MissingVirtioBalloon)
}
pub fn balloon_size(&self) -> u64 {
if let Some(balloon) = &self.balloon {
return balloon.lock().unwrap().get_actual();
}
0
}
pub fn device_tree(&self) -> Arc<Mutex<DeviceTree>> {
self.device_tree.clone()
}
pub fn restore_devices(
&mut self,
snapshot: Snapshot,
) -> std::result::Result<(), MigratableError> {
// Finally, restore all devices associated with the DeviceManager.
// It's important to restore devices in the right order, that's why
// the device tree is the right way to ensure we restore a child before
// its parent node.
for node in self
.device_tree
.lock()
.unwrap()
.breadth_first_traversal()
.rev()
{
// Restore the node
if let Some(migratable) = &node.migratable {
info!("Restoring {} from DeviceManager", node.id);
if let Some(snapshot) = snapshot.snapshots.get(&node.id) {
migratable.lock().unwrap().pause()?;
migratable.lock().unwrap().restore(*snapshot.clone())?;
} else {
return Err(MigratableError::Restore(anyhow!(
"Missing device {}",
node.id
)));
}
}
}
// The devices have been fully restored, we can now update the
// restoring state of the DeviceManager.
self.restoring = false;
Ok(())
}
#[cfg(target_arch = "x86_64")]
pub fn notify_power_button(&self) -> DeviceManagerResult<()> {
self.ged_notification_device
.as_ref()
.unwrap()
.lock()
.unwrap()
.notify(AcpiNotificationFlags::POWER_BUTTON_CHANGED)
.map_err(DeviceManagerError::PowerButtonNotification)
}
#[cfg(target_arch = "aarch64")]
pub fn notify_power_button(&self) -> DeviceManagerResult<()> {
// There are two use cases:
// 1. Users will use direct kernel boot with device tree.
// 2. Users will use ACPI+UEFI boot.
// Trigger a GPIO pin 3 event to satisify use case 1.
self.gpio_device
.as_ref()
.unwrap()
.lock()
.unwrap()
.trigger_key(3)
.map_err(DeviceManagerError::AArch64PowerButtonNotification)?;
// Trigger a GED power button event to satisify use case 2.
return self
.ged_notification_device
.as_ref()
.unwrap()
.lock()
.unwrap()
.notify(AcpiNotificationFlags::POWER_BUTTON_CHANGED)
.map_err(DeviceManagerError::PowerButtonNotification);
}
pub fn iommu_attached_devices(&self) -> &Option<(PciBdf, Vec<PciBdf>)> {
&self.iommu_attached_devices
}
#[cfg(target_arch = "aarch64")]
pub fn uefi_flash(&self) -> GuestMemoryAtomic<GuestMemoryMmap> {
self.uefi_flash.as_ref().unwrap().clone()
}
}
fn numa_node_id_from_memory_zone_id(numa_nodes: &NumaNodes, memory_zone_id: &str) -> Option<u32> {
for (numa_node_id, numa_node) in numa_nodes.iter() {
if numa_node.memory_zones.contains(&memory_zone_id.to_owned()) {
return Some(*numa_node_id);
}
}
None
}
impl Aml for DeviceManager {
fn append_aml_bytes(&self, bytes: &mut Vec<u8>) {
#[cfg(target_arch = "aarch64")]
use arch::aarch64::DeviceInfoForFdt;
let mut pci_scan_methods = Vec::new();
for i in 0..self.pci_segments.len() {
pci_scan_methods.push(aml::MethodCall::new(
format!("\\_SB_.PCI{:X}.PCNT", i).as_str().into(),
vec![],
));
}
let mut pci_scan_inner: Vec<&dyn Aml> = Vec::new();
for method in &pci_scan_methods {
pci_scan_inner.push(method)
}
// PCI hotplug controller
aml::Device::new(
"_SB_.PHPR".into(),
vec![
&aml::Name::new("_HID".into(), &aml::EisaName::new("PNP0A06")),
&aml::Name::new("_STA".into(), &0x0bu8),
&aml::Name::new("_UID".into(), &"PCI Hotplug Controller"),
&aml::Mutex::new("BLCK".into(), 0),
&aml::Name::new(
"_CRS".into(),
&aml::ResourceTemplate::new(vec![&aml::AddressSpace::new_memory(
aml::AddressSpaceCachable::NotCacheable,
true,
self.acpi_address.0 as u64,
self.acpi_address.0 + DEVICE_MANAGER_ACPI_SIZE as u64 - 1,
)]),
),
// OpRegion and Fields map MMIO range into individual field values
&aml::OpRegion::new(
"PCST".into(),
aml::OpRegionSpace::SystemMemory,
self.acpi_address.0 as usize,
DEVICE_MANAGER_ACPI_SIZE,
),
&aml::Field::new(
"PCST".into(),
aml::FieldAccessType::DWord,
aml::FieldUpdateRule::WriteAsZeroes,
vec![
aml::FieldEntry::Named(*b"PCIU", 32),
aml::FieldEntry::Named(*b"PCID", 32),
aml::FieldEntry::Named(*b"B0EJ", 32),
aml::FieldEntry::Named(*b"PSEG", 32),
],
),
&aml::Method::new(
"PCEJ".into(),
2,
true,
vec![
// Take lock defined above
&aml::Acquire::new("BLCK".into(), 0xffff),
// Choose the current segment
&aml::Store::new(&aml::Path::new("PSEG"), &aml::Arg(1)),
// Write PCI bus number (in first argument) to I/O port via field
&aml::ShiftLeft::new(&aml::Path::new("B0EJ"), &aml::ONE, &aml::Arg(0)),
// Release lock
&aml::Release::new("BLCK".into()),
// Return 0
&aml::Return::new(&aml::ZERO),
],
),
&aml::Method::new("PSCN".into(), 0, true, pci_scan_inner),
],
)
.append_aml_bytes(bytes);
for segment in &self.pci_segments {
segment.append_aml_bytes(bytes);
}
let mut mbrd_memory = Vec::new();
for segment in &self.pci_segments {
mbrd_memory.push(aml::Memory32Fixed::new(
true,
segment.mmio_config_address as u32,
layout::PCI_MMIO_CONFIG_SIZE_PER_SEGMENT as u32,
))
}
let mut mbrd_memory_refs = Vec::new();
for mbrd_memory_ref in &mbrd_memory {
mbrd_memory_refs.push(mbrd_memory_ref as &dyn Aml);
}
aml::Device::new(
"_SB_.MBRD".into(),
vec![
&aml::Name::new("_HID".into(), &aml::EisaName::new("PNP0C02")),
&aml::Name::new("_UID".into(), &aml::ZERO),
&aml::Name::new("_CRS".into(), &aml::ResourceTemplate::new(mbrd_memory_refs)),
],
)
.append_aml_bytes(bytes);
// Serial device
#[cfg(target_arch = "x86_64")]
let serial_irq = 4;
#[cfg(target_arch = "aarch64")]
let serial_irq =
if self.config.lock().unwrap().serial.clone().mode != ConsoleOutputMode::Off {
self.get_device_info()
.clone()
.get(&(DeviceType::Serial, DeviceType::Serial.to_string()))
.unwrap()
.irq()
} else {
// If serial is turned off, add a fake device with invalid irq.
31
};
if self.config.lock().unwrap().serial.mode != ConsoleOutputMode::Off {
aml::Device::new(
"_SB_.COM1".into(),
vec![
&aml::Name::new(
"_HID".into(),
#[cfg(target_arch = "x86_64")]
&aml::EisaName::new("PNP0501"),
#[cfg(target_arch = "aarch64")]
&"ARMH0011",
),
&aml::Name::new("_UID".into(), &aml::ZERO),
&aml::Name::new("_DDN".into(), &"COM1"),
&aml::Name::new(
"_CRS".into(),
&aml::ResourceTemplate::new(vec![
&aml::Interrupt::new(true, true, false, false, serial_irq),
#[cfg(target_arch = "x86_64")]
&aml::Io::new(0x3f8, 0x3f8, 0, 0x8),
#[cfg(target_arch = "aarch64")]
&aml::Memory32Fixed::new(
true,
arch::layout::LEGACY_SERIAL_MAPPED_IO_START.raw_value() as u32,
MMIO_LEN as u32,
),
]),
),
],
)
.append_aml_bytes(bytes);
}
aml::Name::new("_S5_".into(), &aml::Package::new(vec![&5u8])).append_aml_bytes(bytes);
aml::Device::new(
"_SB_.PWRB".into(),
vec![
&aml::Name::new("_HID".into(), &aml::EisaName::new("PNP0C0C")),
&aml::Name::new("_UID".into(), &aml::ZERO),
],
)
.append_aml_bytes(bytes);
self.ged_notification_device
.as_ref()
.unwrap()
.lock()
.unwrap()
.append_aml_bytes(bytes);
}
}
impl Pausable for DeviceManager {
fn pause(&mut self) -> result::Result<(), MigratableError> {
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
migratable.lock().unwrap().pause()?;
}
}
// On AArch64, the pause of device manager needs to trigger
// a "pause" of GIC, which will flush the GIC pending tables
// and ITS tables to guest RAM.
#[cfg(target_arch = "aarch64")]
{
let gic_device = Arc::clone(
self.get_interrupt_controller()
.unwrap()
.lock()
.unwrap()
.get_gic_device()
.unwrap(),
);
if let Some(gicv3_its) = gic_device
.lock()
.unwrap()
.as_any_concrete_mut()
.downcast_mut::<KvmGicV3Its>()
{
gicv3_its.pause()?;
} else {
return Err(MigratableError::Pause(anyhow!(
"GicDevice downcast to KvmGicV3Its failed when pausing device manager!"
)));
};
};
Ok(())
}
fn resume(&mut self) -> result::Result<(), MigratableError> {
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
migratable.lock().unwrap().resume()?;
}
}
Ok(())
}
}
impl Snapshottable for DeviceManager {
fn id(&self) -> String {
DEVICE_MANAGER_SNAPSHOT_ID.to_string()
}
fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
let mut snapshot = Snapshot::new(DEVICE_MANAGER_SNAPSHOT_ID);
// We aggregate all devices snapshots.
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
let device_snapshot = migratable.lock().unwrap().snapshot()?;
snapshot.add_snapshot(device_snapshot);
}
}
// Then we store the DeviceManager state.
snapshot.add_data_section(SnapshotDataSection::new_from_state(
DEVICE_MANAGER_SNAPSHOT_ID,
&self.state(),
)?);
Ok(snapshot)
}
fn restore(&mut self, snapshot: Snapshot) -> std::result::Result<(), MigratableError> {
// Let's first restore the DeviceManager.
self.set_state(&snapshot.to_state(DEVICE_MANAGER_SNAPSHOT_ID)?);
// Now that DeviceManager is updated with the right states, it's time
// to create the devices based on the configuration.
self.create_devices(None, None, None)
.map_err(|e| MigratableError::Restore(anyhow!("Could not create devices {:?}", e)))?;
Ok(())
}
}
impl Transportable for DeviceManager {}
impl Migratable for DeviceManager {
fn start_dirty_log(&mut self) -> std::result::Result<(), MigratableError> {
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
migratable.lock().unwrap().start_dirty_log()?;
}
}
Ok(())
}
fn stop_dirty_log(&mut self) -> std::result::Result<(), MigratableError> {
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
migratable.lock().unwrap().stop_dirty_log()?;
}
}
Ok(())
}
fn dirty_log(&mut self) -> std::result::Result<MemoryRangeTable, MigratableError> {
let mut tables = Vec::new();
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
tables.push(migratable.lock().unwrap().dirty_log()?);
}
}
Ok(MemoryRangeTable::new_from_tables(tables))
}
fn start_migration(&mut self) -> std::result::Result<(), MigratableError> {
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
migratable.lock().unwrap().start_migration()?;
}
}
Ok(())
}
fn complete_migration(&mut self) -> std::result::Result<(), MigratableError> {
for (_, device_node) in self.device_tree.lock().unwrap().iter() {
if let Some(migratable) = &device_node.migratable {
migratable.lock().unwrap().complete_migration()?;
}
}
Ok(())
}
}
const PCIU_FIELD_OFFSET: u64 = 0;
const PCID_FIELD_OFFSET: u64 = 4;
const B0EJ_FIELD_OFFSET: u64 = 8;
const PSEG_FIELD_OFFSET: u64 = 12;
const PCIU_FIELD_SIZE: usize = 4;
const PCID_FIELD_SIZE: usize = 4;
const B0EJ_FIELD_SIZE: usize = 4;
const PSEG_FIELD_SIZE: usize = 4;
impl BusDevice for DeviceManager {
fn read(&mut self, base: u64, offset: u64, data: &mut [u8]) {
match offset {
PCIU_FIELD_OFFSET => {
assert!(data.len() == PCIU_FIELD_SIZE);
data.copy_from_slice(
&self.pci_segments[self.selected_segment]
.pci_devices_up
.to_le_bytes(),
);
// Clear the PCIU bitmap
self.pci_segments[self.selected_segment].pci_devices_up = 0;
}
PCID_FIELD_OFFSET => {
assert!(data.len() == PCID_FIELD_SIZE);
data.copy_from_slice(
&self.pci_segments[self.selected_segment]
.pci_devices_down
.to_le_bytes(),
);
// Clear the PCID bitmap
self.pci_segments[self.selected_segment].pci_devices_down = 0;
}
B0EJ_FIELD_OFFSET => {
assert!(data.len() == B0EJ_FIELD_SIZE);
// Always return an empty bitmap since the eject is always
// taken care of right away during a write access.
data.fill(0);
}
PSEG_FIELD_OFFSET => {
assert_eq!(data.len(), PSEG_FIELD_SIZE);
data.copy_from_slice(&(self.selected_segment as u32).to_le_bytes());
}
_ => error!(
"Accessing unknown location at base 0x{:x}, offset 0x{:x}",
base, offset
),
}
debug!(
"PCI_HP_REG_R: base 0x{:x}, offset 0x{:x}, data {:?}",
base, offset, data
)
}
fn write(&mut self, base: u64, offset: u64, data: &[u8]) -> Option<Arc<std::sync::Barrier>> {
match offset {
B0EJ_FIELD_OFFSET => {
assert!(data.len() == B0EJ_FIELD_SIZE);
let mut data_array: [u8; 4] = [0, 0, 0, 0];
data_array.copy_from_slice(data);
let mut slot_bitmap = u32::from_le_bytes(data_array);
while slot_bitmap > 0 {
let slot_id = slot_bitmap.trailing_zeros();
if let Err(e) = self.eject_device(self.selected_segment as u16, slot_id as u8) {
error!("Failed ejecting device {}: {:?}", slot_id, e);
}
slot_bitmap &= !(1 << slot_id);
}
}
PSEG_FIELD_OFFSET => {
assert_eq!(data.len(), PSEG_FIELD_SIZE);
let mut data_array: [u8; 4] = [0, 0, 0, 0];
data_array.copy_from_slice(data);
let selected_segment = u32::from_le_bytes(data_array) as usize;
if selected_segment >= self.pci_segments.len() {
error!(
"Segment selection out of range: {} >= {}",
selected_segment,
self.pci_segments.len()
);
return None;
}
self.selected_segment = selected_segment;
}
_ => error!(
"Accessing unknown location at base 0x{:x}, offset 0x{:x}",
base, offset
),
}
debug!(
"PCI_HP_REG_W: base 0x{:x}, offset 0x{:x}, data {:?}",
base, offset, data
);
None
}
}
impl Drop for DeviceManager {
fn drop(&mut self) {
for handle in self.virtio_devices.drain(..) {
handle.virtio_device.lock().unwrap().shutdown();
}
}
}
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