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rust: qdev: support returning errors from realize

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Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2025-05-23 18:31:29 +02:00
parent 9a33f49f44
commit 4b66abead9
3 changed files with 14 additions and 8 deletions
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5
rust/hw/char/pl011/src/device.rs
View file

@ -175,7 +175,7 @@ impl DeviceImpl for PL011State {
fn vmsd() -> Option<&'static VMStateDescription> {
Some(&device_class::VMSTATE_PL011)
}
const REALIZE: Option<fn(&Self)> = Some(Self::realize);
const REALIZE: Option<fn(&Self) -> qemu_api::Result<()>> = Some(Self::realize);
}
impl ResettablePhasesImpl for PL011State {
@ -619,9 +619,10 @@ impl PL011State {
}
}
fn realize(&self) {
fn realize(&self) -> qemu_api::Result<()> {
self.char_backend
.enable_handlers(self, Self::can_receive, Self::receive, Self::event);
Ok(())
}
fn reset_hold(&self, _type: ResetType) {

5
rust/hw/timer/hpet/src/device.rs
View file

@ -724,7 +724,7 @@ impl HPETState {
}
}
fn realize(&self) {
fn realize(&self) -> qemu_api::Result<()> {
if self.int_route_cap == 0 {
// TODO: Add error binding: warn_report()
println!("Hpet's hpet-intcap property not initialized");
@ -751,6 +751,7 @@ impl HPETState {
self.init_gpio_in(2, HPETState::handle_legacy_irq);
self.init_gpio_out(from_ref(&self.pit_enabled));
Ok(())
}
fn reset_hold(&self, _type: ResetType) {
@ -1042,7 +1043,7 @@ impl DeviceImpl for HPETState {
Some(&VMSTATE_HPET)
}
const REALIZE: Option<fn(&Self)> = Some(Self::realize);
const REALIZE: Option<fn(&Self) -> qemu_api::Result<()>> = Some(Self::realize);
}
impl ResettablePhasesImpl for HPETState {

12
rust/qemu-api/src/qdev.rs
View file

@ -12,10 +12,11 @@ use std::{
pub use bindings::{ClockEvent, DeviceClass, Property, ResetType};
use crate::{
bindings::{self, qdev_init_gpio_in, qdev_init_gpio_out, Error, ResettableClass},
bindings::{self, qdev_init_gpio_in, qdev_init_gpio_out, ResettableClass},
callbacks::FnCall,
cell::{bql_locked, Opaque},
chardev::Chardev,
error::{Error, Result},
irq::InterruptSource,
prelude::*,
qom::{ObjectClass, ObjectImpl, Owned},
@ -108,7 +109,7 @@ pub trait DeviceImpl: ObjectImpl + ResettablePhasesImpl + IsA<DeviceState> {
///
/// If not `None`, the parent class's `realize` method is overridden
/// with the function pointed to by `REALIZE`.
const REALIZE: Option<fn(&Self)> = None;
const REALIZE: Option<fn(&Self) -> Result<()>> = None;
/// An array providing the properties that the user can set on the
/// device. Not a `const` because referencing statics in constants
@ -134,10 +135,13 @@ pub trait DeviceImpl: ObjectImpl + ResettablePhasesImpl + IsA<DeviceState> {
/// readable/writeable from one thread at any time.
unsafe extern "C" fn rust_realize_fn<T: DeviceImpl>(
dev: *mut bindings::DeviceState,
_errp: *mut *mut Error,
errp: *mut *mut bindings::Error,
) {
let state = NonNull::new(dev).unwrap().cast::<T>();
T::REALIZE.unwrap()(unsafe { state.as_ref() });
let result = T::REALIZE.unwrap()(unsafe { state.as_ref() });
unsafe {
Error::ok_or_propagate(result, errp);
}
}
unsafe impl InterfaceType for ResettableClass {