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hypervisor: Move creation of irq routing struct to hypervisor crate

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This removes the requirement to leak as many datastructures from the
hypervisor crate into the vmm crate.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2022-05-10 16:47:34 +01:00
parent fe82322727
commit 3f9e8d676a
6 changed files with 98 additions and 85 deletions
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1
Cargo.lock generated
View File

@ -356,6 +356,7 @@ dependencies = [
"serde_derive",
"serde_json",
"thiserror",
"vm-device",
"vm-memory",
"vmm-sys-util",
]

3
hypervisor/Cargo.toml
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@ -18,11 +18,12 @@ libc = "0.2.125"
log = "0.4.17"
kvm-ioctls = { version = "0.11.0", optional = true }
kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch-v0.5.0-tdx", features = ["with-serde", "fam-wrappers"], optional = true }
mshv-bindings = {git = "https://github.com/rust-vmm/mshv", branch = "main", features = ["with-serde", "fam-wrappers"], optional = true }
mshv-bindings = { git = "https://github.com/rust-vmm/mshv", branch = "main", features = ["with-serde", "fam-wrappers"], optional = true }
mshv-ioctls = { git = "https://github.com/rust-vmm/mshv", branch = "main", optional = true}
serde = { version = "1.0.137", features = ["rc"] }
serde_derive = "1.0.137"
serde_json = "1.0.81"
vm-device = { path = "../vm-device" }
vm-memory = { version = "0.7.0", features = ["backend-mmap", "backend-atomic"] }
vmm-sys-util = { version = "0.9.0", features = ["with-serde"] }

59
hypervisor/src/kvm/mod.rs
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@ -32,6 +32,7 @@ use std::result;
#[cfg(target_arch = "x86_64")]
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::{Arc, RwLock};
use vm_device::interrupt::InterruptSourceConfig;
use vmm_sys_util::eventfd::EventFd;
// x86_64 dependencies
#[cfg(target_arch = "x86_64")]
@ -284,6 +285,64 @@ impl vm::Vm for KvmVm {
.unregister_ioevent(fd, addr, NoDatamatch)
.map_err(|e| vm::HypervisorVmError::UnregisterIoEvent(e.into()))
}
///
/// Constructs a routing entry
///
fn make_routing_entry(
&self,
gsi: u32,
config: &InterruptSourceConfig,
) -> kvm_irq_routing_entry {
match &config {
InterruptSourceConfig::MsiIrq(cfg) => {
let mut kvm_route = kvm_irq_routing_entry {
gsi,
type_: KVM_IRQ_ROUTING_MSI,
..Default::default()
};
kvm_route.u.msi.address_lo = cfg.low_addr;
kvm_route.u.msi.address_hi = cfg.high_addr;
kvm_route.u.msi.data = cfg.data;
if self.check_extension(crate::Cap::MsiDevid) {
// On AArch64, there is limitation on the range of the 'devid',
// it can not be greater than 65536 (the max of u16).
//
// BDF can not be used directly, because 'segment' is in high
// 16 bits. The layout of the u32 BDF is:
// |---- 16 bits ----|-- 8 bits --|-- 5 bits --|-- 3 bits --|
// | segment | bus | device | function |
//
// Now that we support 1 bus only in a segment, we can build a
// 'devid' by replacing the 'bus' bits with the low 8 bits of
// 'segment' data.
// This way we can resolve the range checking problem and give
// different `devid` to all the devices. Limitation is that at
// most 256 segments can be supported.
//
let modified_devid = (cfg.devid & 0x00ff_0000) >> 8 | cfg.devid & 0xff;
kvm_route.flags = KVM_MSI_VALID_DEVID;
kvm_route.u.msi.__bindgen_anon_1.devid = modified_devid;
}
kvm_route
}
InterruptSourceConfig::LegacyIrq(cfg) => {
let mut kvm_route = kvm_irq_routing_entry {
gsi,
type_: KVM_IRQ_ROUTING_IRQCHIP,
..Default::default()
};
kvm_route.u.irqchip.irqchip = cfg.irqchip;
kvm_route.u.irqchip.pin = cfg.pin;
kvm_route
}
}
}
///
/// Sets the GSI routing table entries, overwriting any previously set
/// entries, as per the `KVM_SET_GSI_ROUTING` ioctl.

22
hypervisor/src/mshv/mod.rs
View File

@ -23,6 +23,7 @@ use vm::DataMatch;
#[cfg(target_arch = "x86_64")]
pub mod x86_64;
use crate::device;
use vm_device::interrupt::InterruptSourceConfig;
use vmm_sys_util::eventfd::EventFd;
#[cfg(target_arch = "x86_64")]
pub use x86_64::VcpuMshvState as CpuState;
@ -957,6 +958,27 @@ impl vm::Vm for MshvVm {
.map_err(|e| vm::HypervisorVmError::CreatePassthroughDevice(e.into()))
}
///
/// Constructs a routing entry
///
fn make_routing_entry(
&self,
gsi: u32,
config: &InterruptSourceConfig,
) -> mshv_msi_routing_entry {
match config {
InterruptSourceConfig::MsiIrq(cfg) => mshv_msi_routing_entry {
gsi,
address_lo: cfg.low_addr,
address_hi: cfg.high_addr,
data: cfg.data,
},
_ => {
unreachable!()
}
}
}
fn set_gsi_routing(&self, entries: &[IrqRoutingEntry]) -> vm::Result<()> {
let mut msi_routing =
vec_with_array_field::<mshv_msi_routing, mshv_msi_routing_entry>(entries.len());

3
hypervisor/src/vm.rs
View File

@ -28,6 +28,7 @@ use kvm_ioctls::Cap;
use std::fs::File;
use std::sync::Arc;
use thiserror::Error;
use vm_device::interrupt::InterruptSourceConfig;
use vmm_sys_util::eventfd::EventFd;
///
@ -245,6 +246,8 @@ pub trait Vm: Send + Sync {
) -> Result<()>;
/// Unregister an event from a certain address it has been previously registered to.
fn unregister_ioevent(&self, fd: &EventFd, addr: &IoEventAddress) -> Result<()>;
// Construct a routing entry
fn make_routing_entry(&self, gsi: u32, config: &InterruptSourceConfig) -> IrqRoutingEntry;
/// Sets the GSI routing table entries, overwriting any previously set
fn set_gsi_routing(&self, entries: &[IrqRoutingEntry]) -> Result<()>;
/// Creates a memory region structure that can be used with {create/remove}_user_memory_region

95
vmm/src/interrupt.rs
View File

@ -303,9 +303,7 @@ impl InterruptManager for MsiInterruptManager<IrqRoutingEntry> {
#[cfg(feature = "kvm")]
pub mod kvm {
use super::*;
use hypervisor::kvm::KVM_MSI_VALID_DEVID;
use hypervisor::kvm::{kvm_irq_routing_entry, KVM_IRQ_ROUTING_IRQCHIP, KVM_IRQ_ROUTING_MSI};
use pci::PciBdf;
use hypervisor::kvm::kvm_irq_routing_entry;
type KvmRoutingEntry = RoutingEntry<kvm_irq_routing_entry>;
pub type KvmMsiInterruptManager = MsiInterruptManager<kvm_irq_routing_entry>;
@ -316,66 +314,10 @@ pub mod kvm {
gsi: u32,
config: &InterruptSourceConfig,
) -> Result<Box<Self>> {
if let InterruptSourceConfig::MsiIrq(cfg) = &config {
let mut kvm_route = kvm_irq_routing_entry {
gsi,
type_: KVM_IRQ_ROUTING_MSI,
..Default::default()
};
kvm_route.u.msi.address_lo = cfg.low_addr;
kvm_route.u.msi.address_hi = cfg.high_addr;
kvm_route.u.msi.data = cfg.data;
if vm.check_extension(hypervisor::Cap::MsiDevid) {
// On AArch64, there is limitation on the range of the 'devid',
// it can not be greater than 65536 (the max of u16).
//
// BDF can not be used directly, because 'segment' is in high
// 16 bits. The layout of the u32 BDF is:
// |---- 16 bits ----|-- 8 bits --|-- 5 bits --|-- 3 bits --|
// | segment | bus | device | function |
//
// Now that we support 1 bus only in a segment, we can build a
// 'devid' by replacing the 'bus' bits with the low 8 bits of
// 'segment' data.
// This way we can resolve the range checking problem and give
// different `devid` to all the devices. Limitation is that at
// most 256 segments can be supported.
//
let bdf: PciBdf = PciBdf::from(cfg.devid);
let modified_bdf: PciBdf =
PciBdf::new(0, bdf.segment() as u8, bdf.device(), bdf.function());
kvm_route.flags = KVM_MSI_VALID_DEVID;
kvm_route.u.msi.__bindgen_anon_1.devid = modified_bdf.into();
}
let kvm_entry = KvmRoutingEntry {
route: kvm_route,
masked: false,
};
return Ok(Box::new(kvm_entry));
} else if let InterruptSourceConfig::LegacyIrq(cfg) = &config {
let mut kvm_route = kvm_irq_routing_entry {
gsi,
type_: KVM_IRQ_ROUTING_IRQCHIP,
..Default::default()
};
kvm_route.u.irqchip.irqchip = cfg.irqchip;
kvm_route.u.irqchip.pin = cfg.pin;
let kvm_entry = KvmRoutingEntry {
route: kvm_route,
masked: false,
};
return Ok(Box::new(kvm_entry));
}
Err(io::Error::new(
io::ErrorKind::Other,
"Interrupt config type not supported",
))
Ok(Box::new(Self {
masked: false,
route: vm.make_routing_entry(gsi, config),
}))
}
}
}
@ -383,36 +325,21 @@ pub mod kvm {
#[cfg(feature = "mshv")]
pub mod mshv {
use super::*;
use hypervisor::mshv::*;
use hypervisor::mshv::mshv_msi_routing_entry;
type MshvRoutingEntry = RoutingEntry<mshv_msi_routing_entry>;
pub type MshvMsiInterruptManager = MsiInterruptManager<mshv_msi_routing_entry>;
impl MshvRoutingEntry {
pub fn make_entry(
_vm: &Arc<dyn hypervisor::Vm>,
vm: &Arc<dyn hypervisor::Vm>,
gsi: u32,
config: &InterruptSourceConfig,
) -> Result<Box<Self>> {
if let InterruptSourceConfig::MsiIrq(cfg) = &config {
let route = mshv_msi_routing_entry {
gsi,
address_lo: cfg.low_addr,
address_hi: cfg.high_addr,
data: cfg.data,
};
let entry = MshvRoutingEntry {
route,
masked: false,
};
return Ok(Box::new(entry));
}
Err(io::Error::new(
io::ErrorKind::Other,
"Interrupt config type not supported",
))
Ok(Box::new(Self {
masked: false,
route: vm.make_routing_entry(gsi, config),
}))
}
}
}