External/cloud-hypervisor
1
0
Fork 0
mirror of https://github.com/cloud-hypervisor/cloud-hypervisor.git synced 2024-11-04 19:11:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

hypervisor, vmm: use new vfio-ioctls

Browse Source 
Use the new vfio-ioctls APIs. Drop Cloud Hypervisor's Device trait
since it is no longer needed.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2022-07-21 13:15:15 +00:00 committed by Liu Wei
parent 5e2c70b87f
commit a96a5d7816
10 changed files with 36 additions and 128 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Cargo.lock generated
View File

@ -355,6 +355,7 @@ dependencies = [
"serde",
"serde_json",
"thiserror",
"vfio-ioctls",
"vm-memory",
"vmm-sys-util",
]
@ -1141,7 +1142,7 @@ dependencies = [
[[package]]
name = "vfio-ioctls"
version = "0.1.0"
source = "git+https://github.com/rust-vmm/vfio?branch=main#0e0e115551d7c3c894d42d8351e3d44f133e9056"
source = "git+https://github.com/rust-vmm/vfio?branch=main#1ff2324e5cb0fccab825f9c96bb9387a1a01863f"
dependencies = [
"byteorder",
"kvm-bindings",

3
fuzz/Cargo.lock generated
View File

@ -293,6 +293,7 @@ dependencies = [
"serde",
"serde_json",
"thiserror",
"vfio-ioctls",
"vm-memory",
"vmm-sys-util",
]
@ -723,7 +724,7 @@ dependencies = [
[[package]]
name = "vfio-ioctls"
version = "0.1.0"
source = "git+https://github.com/rust-vmm/vfio?branch=main#4630612f2ff300e78b6d55be324fb5481aa84661"
source = "git+https://github.com/rust-vmm/vfio?branch=main#1ff2324e5cb0fccab825f9c96bb9387a1a01863f"
dependencies = [
"byteorder",
"kvm-bindings",

1
hypervisor/Cargo.toml
View File

@ -23,6 +23,7 @@ mshv-bindings = { git = "https://github.com/rust-vmm/mshv", branch = "main", fea
mshv-ioctls = { git = "https://github.com/rust-vmm/mshv", branch = "main", optional = true}
serde = { version = "1.0.140", features = ["rc", "derive"] }
serde_json = "1.0.82"
vfio-ioctls = { git = "https://github.com/rust-vmm/vfio", branch = "main", default-features = false }
vm-memory = { version = "0.8.0", features = ["backend-mmap", "backend-atomic"] }
vmm-sys-util = { version = "0.10.0", features = ["with-serde"] }

22
hypervisor/src/device.rs
View File

@ -9,9 +9,6 @@
// Copyright 2020, ARM Limited
//
use crate::DeviceAttr;
use std::any::Any;
use std::os::unix::io::AsRawFd;
use thiserror::Error;
#[derive(Error, Debug)]
@ -29,22 +26,3 @@ pub enum HypervisorDeviceError {
#[error("Failed to get device attribute: {0}")]
GetDeviceAttribute(#[source] anyhow::Error),
}
///
/// Result type for returning from a function
///
pub type Result<T> = std::result::Result<T, HypervisorDeviceError>;
///
/// Trait to represent a device
///
/// This crate provides a hypervisor-agnostic interfaces for device
///
pub trait Device: Send + Sync + AsRawFd {
/// Set device attribute.
fn set_device_attr(&self, attr: &DeviceAttr) -> Result<()>;
/// Get device attribute.
fn get_device_attr(&self, attr: &mut DeviceAttr) -> Result<()>;
/// Provide a way to downcast to the device fd.
fn as_any(&self) -> &dyn Any;
}

10
hypervisor/src/kvm/aarch64/gic/mod.rs
View File

@ -166,6 +166,9 @@ impl KvmGicV3Its {
.create_device(&mut its_device)
.map_err(Error::CreateGic)?;
// We know vm is KvmVm
let its_fd = its_fd.to_kvm().unwrap();
Self::set_device_attribute(
&its_fd,
kvm_bindings::KVM_DEV_ARM_VGIC_GRP_ADDR,
@ -216,7 +219,12 @@ impl KvmGicV3Its {
flags: 0,
};
vm.create_device(&mut gic_device).map_err(Error::CreateGic)
let device_fd = vm
.create_device(&mut gic_device)
.map_err(Error::CreateGic)?;
// We know for sure this is a KVM fd
Ok(device_fd.to_kvm().unwrap())
}
/// Set a GIC device attribute

42
hypervisor/src/kvm/mod.rs
View File

@ -18,7 +18,6 @@ pub use crate::aarch64::{
#[cfg(target_arch = "aarch64")]
use crate::arch::aarch64::gic::Vgic;
use crate::cpu;
use crate::device;
use crate::hypervisor;
use crate::vec_with_array_field;
use crate::vm::{self, InterruptSourceConfig, VmOps};
@ -88,6 +87,7 @@ pub use kvm_ioctls::{Cap, Kvm};
#[cfg(target_arch = "aarch64")]
use std::mem;
use thiserror::Error;
use vfio_ioctls::VfioDeviceFd;
#[cfg(feature = "tdx")]
use vmm_sys_util::{ioctl::ioctl_with_val, ioctl_ioc_nr, ioctl_iowr_nr};
///
@ -95,8 +95,7 @@ use vmm_sys_util::{ioctl::ioctl_with_val, ioctl_ioc_nr, ioctl_iowr_nr};
///
pub use {
kvm_bindings::kvm_create_device as CreateDevice, kvm_bindings::kvm_device_attr as DeviceAttr,
kvm_bindings::kvm_run, kvm_bindings::kvm_vcpu_events as VcpuEvents, kvm_ioctls::DeviceFd,
kvm_ioctls::VcpuExit,
kvm_bindings::kvm_run, kvm_bindings::kvm_vcpu_events as VcpuEvents, kvm_ioctls::VcpuExit,
};
#[cfg(target_arch = "x86_64")]
@ -319,12 +318,12 @@ impl KvmVm {
/// Creates an emulated device in the kernel.
///
/// See the documentation for `KVM_CREATE_DEVICE`.
fn create_device(&self, device: &mut CreateDevice) -> vm::Result<DeviceFd> {
fn create_device(&self, device: &mut CreateDevice) -> vm::Result<vfio_ioctls::VfioDeviceFd> {
let device_fd = self
.fd
.create_device(device)
.map_err(|e| vm::HypervisorVmError::CreateDevice(e.into()))?;
Ok(device_fd)
Ok(VfioDeviceFd::new_from_kvm(device_fd))
}
}
@ -687,16 +686,15 @@ impl vm::Vm for KvmVm {
self.fd.check_extension(c)
}
/// Create a device that is used for passthrough
fn create_passthrough_device(&self) -> vm::Result<Arc<dyn device::Device>> {
fn create_passthrough_device(&self) -> vm::Result<VfioDeviceFd> {
let mut vfio_dev = kvm_create_device {
type_: kvm_device_type_KVM_DEV_TYPE_VFIO,
fd: 0,
flags: 0,
};
Ok(Arc::new(self.create_device(&mut vfio_dev).map_err(
|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()),
)?))
self.create_device(&mut vfio_dev)
.map_err(|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()))
}
///
/// Start logging dirty pages
@ -2142,29 +2140,3 @@ impl KvmVcpu {
.map_err(|e| cpu::HypervisorCpuError::SetVcpuEvents(e.into()))
}
}
/// Device struct for KVM
pub type KvmDevice = DeviceFd;
impl device::Device for KvmDevice {
///
/// Set device attribute
///
fn set_device_attr(&self, attr: &DeviceAttr) -> device::Result<()> {
self.set_device_attr(attr)
.map_err(|e| device::HypervisorDeviceError::SetDeviceAttribute(e.into()))
}
///
/// Get device attribute
///
fn get_device_attr(&self, attr: &mut DeviceAttr) -> device::Result<()> {
self.get_device_attr(attr)
.map_err(|e| device::HypervisorDeviceError::GetDeviceAttribute(e.into()))
}
///
/// Cast to the underlying KVM device fd
///
fn as_any(&self) -> &dyn Any {
self
}
}

7
hypervisor/src/lib.rs
View File

@ -51,20 +51,15 @@ mod cpu;
mod device;
pub use cpu::{HypervisorCpuError, Vcpu, VmExit};
pub use device::{Device, HypervisorDeviceError};
pub use device::HypervisorDeviceError;
pub use hypervisor::{Hypervisor, HypervisorError};
#[cfg(all(feature = "kvm", target_arch = "x86_64"))]
pub use kvm::x86_64;
#[cfg(all(feature = "kvm", target_arch = "aarch64"))]
pub use kvm::{aarch64, GicState};
// Aliased types exposed from both hypervisors
#[cfg(feature = "kvm")]
pub use kvm::{CreateDevice, DeviceAttr, DeviceFd};
#[cfg(all(feature = "mshv", target_arch = "x86_64"))]
pub use mshv::x86_64;
// Aliased types exposed from both hypervisors
#[cfg(all(feature = "mshv", target_arch = "x86_64"))]
pub use mshv::{CreateDevice, DeviceAttr, DeviceFd};
use std::sync::Arc;
pub use vm::{
DataMatch, HypervisorVmError, InterruptSourceConfig, LegacyIrqSourceConfig, MsiIrqSourceConfig,

39
hypervisor/src/mshv/mod.rs
View File

@ -17,11 +17,11 @@ use mshv_ioctls::{set_registers_64, Mshv, NoDatamatch, VcpuFd, VmFd};
use std::any::Any;
use std::collections::HashMap;
use std::sync::{Arc, RwLock};
use vfio_ioctls::VfioDeviceFd;
use vm::DataMatch;
// x86_64 dependencies
#[cfg(target_arch = "x86_64")]
pub mod x86_64;
use crate::device;
use crate::{
ClockData, CpuState, IoEventAddress, IrqRoutingEntry, MpState, UserMemoryRegion,
USER_MEMORY_REGION_EXECUTE, USER_MEMORY_REGION_READ, USER_MEMORY_REGION_WRITE,
@ -753,32 +753,6 @@ impl MshvVcpu {
}
}
/// Device struct for MSHV
pub type MshvDevice = DeviceFd;
impl device::Device for MshvDevice {
///
/// Set device attribute
///
fn set_device_attr(&self, attr: &DeviceAttr) -> device::Result<()> {
self.set_device_attr(attr)
.map_err(|e| device::HypervisorDeviceError::SetDeviceAttribute(e.into()))
}
///
/// Get device attribute
///
fn get_device_attr(&self, attr: &mut DeviceAttr) -> device::Result<()> {
self.get_device_attr(attr)
.map_err(|e| device::HypervisorDeviceError::GetDeviceAttribute(e.into()))
}
///
/// Cast to the underlying MSHV device fd
///
fn as_any(&self) -> &dyn Any {
self
}
}
struct MshvEmulatorContext<'a> {
vcpu: &'a MshvVcpu,
map: (u64, u64), // Initial GVA to GPA mapping provided by the hypervisor
@ -918,12 +892,12 @@ impl MshvVm {
/// Creates an in-kernel device.
///
/// See the documentation for `MSHV_CREATE_DEVICE`.
fn create_device(&self, device: &mut CreateDevice) -> vm::Result<DeviceFd> {
fn create_device(&self, device: &mut CreateDevice) -> vm::Result<VfioDeviceFd> {
let device_fd = self
.fd
.create_device(device)
.map_err(|e| vm::HypervisorVmError::CreateDevice(e.into()))?;
Ok(device_fd)
Ok(VfioDeviceFd::new_from_mshv(device_fd))
}
}
@ -1110,16 +1084,15 @@ impl vm::Vm for MshvVm {
.into()
}
fn create_passthrough_device(&self) -> vm::Result<Arc<dyn device::Device>> {
fn create_passthrough_device(&self) -> vm::Result<VfioDeviceFd> {
let mut vfio_dev = mshv_create_device {
type_: mshv_device_type_MSHV_DEV_TYPE_VFIO,
fd: 0,
flags: 0,
};
Ok(Arc::new(self.create_device(&mut vfio_dev).map_err(
|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()),
)?))
self.create_device(&mut vfio_dev)
.map_err(|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()))
}
///

3
hypervisor/src/vm.rs
View File

@ -15,7 +15,6 @@ use crate::arch::aarch64::gic::Vgic;
#[cfg(feature = "tdx")]
use crate::arch::x86::CpuIdEntry;
use crate::cpu::Vcpu;
use crate::device::Device;
#[cfg(target_arch = "x86_64")]
use crate::ClockData;
use crate::UserMemoryRegion;
@ -331,7 +330,7 @@ pub trait Vm: Send + Sync + Any {
/// Checks if a particular `Cap` is available.
fn check_extension(&self, c: Cap) -> bool;
/// Create a device that is used for passthrough
fn create_passthrough_device(&self) -> Result<Arc<dyn Device>>;
fn create_passthrough_device(&self) -> Result<vfio_ioctls::VfioDeviceFd>;
/// Start logging dirty pages
fn start_dirty_log(&self) -> Result<()>;
/// Stop logging dirty pages

34
vmm/src/device_manager.rs
View File

@ -50,7 +50,7 @@ use devices::legacy::Serial;
use devices::{
interrupt_controller, interrupt_controller::InterruptController, AcpiNotificationFlags,
};
use hypervisor::{DeviceFd, HypervisorVmError, IoEventAddress};
use hypervisor::{HypervisorVmError, IoEventAddress};
use libc::{
cfmakeraw, isatty, tcgetattr, tcsetattr, termios, MAP_NORESERVE, MAP_PRIVATE, MAP_SHARED,
O_TMPFILE, PROT_READ, PROT_WRITE, TCSANOW,
@ -75,7 +75,7 @@ use std::path::PathBuf;
use std::result;
use std::sync::{Arc, Mutex};
use std::time::Instant;
use vfio_ioctls::{VfioContainer, VfioDevice};
use vfio_ioctls::{VfioContainer, VfioDevice, VfioDeviceFd};
use virtio_devices::transport::VirtioTransport;
use virtio_devices::transport::{VirtioPciDevice, VirtioPciDeviceActivator};
use virtio_devices::vhost_user::VhostUserConfig;
@ -867,7 +867,7 @@ pub struct DeviceManager {
legacy_interrupt_manager: Option<Arc<dyn InterruptManager<GroupConfig = LegacyIrqGroupConfig>>>,
// Passthrough device handle
passthrough_device: Option<Arc<dyn hypervisor::Device>>,
passthrough_device: Option<VfioDeviceFd>,
// VFIO container
// Only one container can be created, therefore it is stored as part of the
@ -2942,32 +2942,12 @@ impl DeviceManager {
.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);
}
let dup = passthrough_device
.try_clone()
.map_err(DeviceManagerError::VfioCreate)?;
assert!(passthrough_device.as_any().is::<DeviceFd>());
// 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)?,
VfioContainer::new(Some(Arc::new(dup))).map_err(DeviceManagerError::VfioCreate)?,
))
}