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https://github.com/Motorhead1991/qemu.git
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37fdb2f56a
This commit adds a re-implementation of hw/char/pl011.c in Rust. How to build: 1. Configure a QEMU build with: --enable-system --target-list=aarch64-softmmu --enable-rust 2. Launching a VM with qemu-system-aarch64 should use the Rust version of the pl011 device Co-authored-by: Junjie Mao <junjie.mao@intel.com> Co-authored-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Junjie Mao <junjie.mao@intel.com> Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Link: https://lore.kernel.org/r/20241024-rust-round-2-v1-2-051e7a25b978@linaro.org
70 lines
1.9 KiB
Rust
70 lines
1.9 KiB
Rust
// Copyright 2024, Linaro Limited
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// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
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// SPDX-License-Identifier: GPL-2.0-or-later
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use core::ptr::NonNull;
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use qemu_api::{bindings::*, definitions::ObjectImpl};
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use crate::device::PL011State;
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#[used]
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pub static VMSTATE_PL011: VMStateDescription = VMStateDescription {
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name: PL011State::TYPE_INFO.name,
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unmigratable: true,
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..unsafe { ::core::mem::MaybeUninit::<VMStateDescription>::zeroed().assume_init() }
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};
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qemu_api::declare_properties! {
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PL011_PROPERTIES,
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qemu_api::define_property!(
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c"chardev",
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PL011State,
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char_backend,
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unsafe { &qdev_prop_chr },
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CharBackend
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),
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qemu_api::define_property!(
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c"migrate-clk",
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PL011State,
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migrate_clock,
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unsafe { &qdev_prop_bool },
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bool
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),
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}
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qemu_api::device_class_init! {
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pl011_class_init,
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props => PL011_PROPERTIES,
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realize_fn => Some(pl011_realize),
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legacy_reset_fn => Some(pl011_reset),
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vmsd => VMSTATE_PL011,
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}
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/// # Safety
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///
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/// We expect the FFI user of this function to pass a valid pointer, that has
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/// the same size as [`PL011State`]. We also expect the device is
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/// readable/writeable from one thread at any time.
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#[no_mangle]
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pub unsafe extern "C" fn pl011_realize(dev: *mut DeviceState, _errp: *mut *mut Error) {
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unsafe {
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assert!(!dev.is_null());
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let mut state = NonNull::new_unchecked(dev.cast::<PL011State>());
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state.as_mut().realize();
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}
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}
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/// # Safety
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///
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/// We expect the FFI user of this function to pass a valid pointer, that has
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/// the same size as [`PL011State`]. We also expect the device is
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/// readable/writeable from one thread at any time.
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#[no_mangle]
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pub unsafe extern "C" fn pl011_reset(dev: *mut DeviceState) {
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unsafe {
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assert!(!dev.is_null());
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let mut state = NonNull::new_unchecked(dev.cast::<PL011State>());
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state.as_mut().reset();
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}
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}
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