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hypervisor: provide a generic IrqRoutingEntry structure

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu
2022-07-14 18:59:13 +00:00
committed by Liu Wei
parent 2de7121680
commit d20f647b32
3 changed files with 76 additions and 25 deletions
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45
hypervisor/src/kvm/mod.rs
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@@ -50,8 +50,8 @@ use crate::arch::x86::NUM_IOAPIC_PINS;
#[cfg(target_arch = "x86_64")]
use crate::ClockData;
use crate::{
CpuState, IoEventAddress, MpState, UserMemoryRegion, USER_MEMORY_REGION_LOG_DIRTY,
USER_MEMORY_REGION_READ, USER_MEMORY_REGION_WRITE,
CpuState, IoEventAddress, IrqRoutingEntry, MpState, UserMemoryRegion,
USER_MEMORY_REGION_LOG_DIRTY, USER_MEMORY_REGION_READ, USER_MEMORY_REGION_WRITE,
};
#[cfg(target_arch = "aarch64")]
use aarch64::{RegList, Register, StandardRegisters};
@@ -95,8 +95,8 @@ use vmm_sys_util::{ioctl::ioctl_with_val, ioctl_expr, ioctl_ioc_nr, ioctl_iowr_n
///
pub use {
kvm_bindings::kvm_create_device as CreateDevice, kvm_bindings::kvm_device_attr as DeviceAttr,
kvm_bindings::kvm_irq_routing_entry as IrqRoutingEntry, 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::DeviceFd,
kvm_ioctls::VcpuExit,
};
#[cfg(target_arch = "x86_64")]
@@ -282,6 +282,23 @@ impl From<ClockData> for kvm_clock_data {
}
}
impl From<kvm_irq_routing_entry> for IrqRoutingEntry {
fn from(s: kvm_irq_routing_entry) -> Self {
IrqRoutingEntry::Kvm(s)
}
}
impl From<IrqRoutingEntry> for kvm_irq_routing_entry {
fn from(e: IrqRoutingEntry) -> Self {
match e {
IrqRoutingEntry::Kvm(e) => e,
/* Needed in case other hypervisors are enabled */
#[allow(unreachable_patterns)]
_ => panic!("IrqRoutingEntry is not valid"),
}
}
}
struct KvmDirtyLogSlot {
slot: u32,
guest_phys_addr: u64,
@@ -437,11 +454,7 @@ impl vm::Vm for KvmVm {
///
/// Constructs a routing entry
///
fn make_routing_entry(
&self,
gsi: u32,
config: &InterruptSourceConfig,
) -> kvm_irq_routing_entry {
fn make_routing_entry(&self, gsi: u32, config: &InterruptSourceConfig) -> IrqRoutingEntry {
match &config {
InterruptSourceConfig::MsiIrq(cfg) => {
let mut kvm_route = kvm_irq_routing_entry {
@@ -475,7 +488,7 @@ impl vm::Vm for KvmVm {
kvm_route.flags = KVM_MSI_VALID_DEVID;
kvm_route.u.msi.__bindgen_anon_1.devid = modified_devid;
}
kvm_route
kvm_route.into()
}
InterruptSourceConfig::LegacyIrq(cfg) => {
let mut kvm_route = kvm_irq_routing_entry {
@@ -486,7 +499,7 @@ impl vm::Vm for KvmVm {
kvm_route.u.irqchip.irqchip = cfg.irqchip;
kvm_route.u.irqchip.pin = cfg.pin;
kvm_route
kvm_route.into()
}
}
}
@@ -500,6 +513,14 @@ impl vm::Vm for KvmVm {
vec_with_array_field::<kvm_irq_routing, kvm_irq_routing_entry>(entries.len());
irq_routing[0].nr = entries.len() as u32;
irq_routing[0].flags = 0;
let entries: Vec<kvm_irq_routing_entry> = entries
.iter()
.map(|entry| match entry {
IrqRoutingEntry::Kvm(e) => *e,
#[allow(unreachable_patterns)]
_ => panic!("IrqRoutingEntry type is wrong"),
})
.collect();
// SAFETY: irq_routing initialized with entries.len() and now it is being turned into
// entries_slice with entries.len() again. It is guaranteed to be large enough to hold
@@ -507,7 +528,7 @@ impl vm::Vm for KvmVm {
unsafe {
let entries_slice: &mut [kvm_irq_routing_entry] =
irq_routing[0].entries.as_mut_slice(entries.len());
entries_slice.copy_from_slice(entries);
entries_slice.copy_from_slice(&entries);
}
self.fd