Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* first commit for Rust support
* add CI job using Fedora + Rust nightly
* fix detection of ATOMIC128 on x86_64
* fix compilation with Sphinx 8.1.0

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# gpg: Signature made Fri 11 Oct 2024 12:48:53 BST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu:
  docs: use consistent markup for footnotes
  docs: avoid footnotes consisting of just URLs
  docs: fix invalid footnote syntax
  gitlab-ci: add Rust-enabled CI job
  dockerfiles: add a Dockerfile using a nightly Rust toolchain
  meson: ensure -mcx16 is passed when detecting ATOMIC128
  meson: define qemu_isa_flags
  meson: fix machine option for x86_version
  rust: add PL011 device model
  rust: add utility procedural macro crate
  scripts/archive-source: find directory name for subprojects
  rust: add crate to expose bindings and interfaces
  meson.build: add HAVE_GLIB_WITH_ALIGNED_ALLOC flag
  .gitattributes: add Rust diff and merge attributes
  rust: add bindgen step as a meson dependency
  configure, meson: detect Rust toolchain
  build-sys: Add rust feature option
  Require meson version 1.5.0

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/rust/hw/char/pl011/src/memory_ops.rs b/rust/hw/char/pl011/src/memory_ops.rs
new file mode 100644
index 0000000000..8d066ebf6d
--- /dev/null
+++ b/rust/hw/char/pl011/src/memory_ops.rs
@@ -0,0 +1,59 @@
+// Copyright 2024, Linaro Limited
+// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+use core::{mem::MaybeUninit, ptr::NonNull};
+
+use qemu_api::bindings::*;
+
+use crate::device::PL011State;
+
+pub static PL011_OPS: MemoryRegionOps = MemoryRegionOps {
+    read: Some(pl011_read),
+    write: Some(pl011_write),
+    read_with_attrs: None,
+    write_with_attrs: None,
+    endianness: device_endian::DEVICE_NATIVE_ENDIAN,
+    valid: unsafe { MaybeUninit::<MemoryRegionOps__bindgen_ty_1>::zeroed().assume_init() },
+    impl_: MemoryRegionOps__bindgen_ty_2 {
+        min_access_size: 4,
+        max_access_size: 4,
+        ..unsafe { MaybeUninit::<MemoryRegionOps__bindgen_ty_2>::zeroed().assume_init() }
+    },
+};
+
+#[no_mangle]
+unsafe extern "C" fn pl011_read(
+    opaque: *mut core::ffi::c_void,
+    addr: hwaddr,
+    size: core::ffi::c_uint,
+) -> u64 {
+    assert!(!opaque.is_null());
+    let mut state = unsafe { NonNull::new_unchecked(opaque.cast::<PL011State>()) };
+    let val = unsafe { state.as_mut().read(addr, size) };
+    match val {
+        std::ops::ControlFlow::Break(val) => val,
+        std::ops::ControlFlow::Continue(val) => {
+            // SAFETY: self.char_backend is a valid CharBackend instance after it's been
+            // initialized in realize().
+            let cb_ptr = unsafe { core::ptr::addr_of_mut!(state.as_mut().char_backend) };
+            unsafe { qemu_chr_fe_accept_input(cb_ptr) };
+
+            val
+        }
+    }
+}
+
+#[no_mangle]
+unsafe extern "C" fn pl011_write(
+    opaque: *mut core::ffi::c_void,
+    addr: hwaddr,
+    data: u64,
+    _size: core::ffi::c_uint,
+) {
+    unsafe {
+        assert!(!opaque.is_null());
+        let mut state = NonNull::new_unchecked(opaque.cast::<PL011State>());
+        state.as_mut().write(addr, data)
+    }
+}