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vmm: interrupt: provide and use extension trait RoutingEntryExt

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This trait contains a function which produces a interrupt routing entry.

Implement that trait for KvmRoutingEntry and rewrite the update
function.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2020-06-27 15:56:43 +00:00 committed by Rob Bradford
parent 4dbca81b86
commit b2abead65b
1 changed files with 37 additions and 26 deletions
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63
vmm/src/interrupt.rs
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@ -116,6 +116,38 @@ struct MsiInterruptGroup<E> {
irq_routes: HashMap<InterruptIndex, InterruptRoute>,
}
trait RoutingEntryExt {
fn make_entry(gsi: u32, config: &InterruptSourceConfig) -> Result<Box<Self>>;
}
impl RoutingEntryExt for KvmRoutingEntry {
fn make_entry(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;
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",
))
}
}
impl<E> MsiInterruptGroup<E> {
fn new(
vm_fd: Arc<dyn hypervisor::Vm>,
@ -202,32 +234,11 @@ impl InterruptSourceGroup for KvmMsiInterruptGroup {
fn update(&self, index: InterruptIndex, config: InterruptSourceConfig) -> Result<()> {
if let Some(route) = self.irq_routes.get(&index) {
if let InterruptSourceConfig::MsiIrq(cfg) = &config {
let mut kvm_route = kvm_irq_routing_entry {
gsi: route.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;
let kvm_entry = KvmRoutingEntry {
route: kvm_route,
masked: false,
};
self.gsi_msi_routes
.lock()
.unwrap()
.insert(route.gsi, kvm_entry);
} else {
return Err(io::Error::new(
io::ErrorKind::Other,
"Interrupt config type not supported",
));
}
let entry = KvmRoutingEntry::make_entry(route.gsi, &config)?;
self.gsi_msi_routes
.lock()
.unwrap()
.insert(route.gsi, *entry);
return self.set_gsi_routes();
}