rust: add bindings for interrupt sources

The InterruptSource bindings let us call qemu_set_irq() and sysbus_init_irq()
as safe code.

Interrupt sources, qemu_irq in C code, are pointers to IRQState objects.
They are QOM link properties and can be written to outside the control
of the device (i.e. from a shared reference); therefore they must be
interior-mutable in Rust.  Since thread-safety is provided by the BQL,
what we want here is the newly-introduced BqlCell.  A pointer to the
contents of the BqlCell (an IRQState**, or equivalently qemu_irq*)
is then passed to the C sysbus_init_irq function.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/rust/qemu-api/src/lib.rs b/rust/qemu-api/src/lib.rs
index e5956cd5eb..0efbef4744 100644
--- a/rust/qemu-api/src/lib.rs
+++ b/rust/qemu-api/src/lib.rs
@@ -16,7 +16,9 @@ pub mod c_str;
 pub mod cell;
 pub mod definitions;
 pub mod device_class;
+pub mod irq;
 pub mod offset_of;
+pub mod sysbus;
 pub mod vmstate;
 pub mod zeroable;