1 /*
2 * Copyright (c) 2025 Google Inc. All rights reserved
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files
6 * (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify, merge,
8 * publish, distribute, sublicense, and/or sell copies of the Software,
9 * and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23 #![no_std]
24 #![feature(unsigned_is_multiple_of)]
25
26 use core::ffi::c_int;
27
28 use rust_support::paddr_t;
29 use rust_support::Error as LkError;
30
31 #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
32 mod hyp;
33
34 // TODO: Enable for x86_64 once it's supported.
35 #[cfg(target_arch = "aarch64")]
36 pub use hyp::mmio_map_region;
37
38 #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
39 pub use hyp::{share_pages, unshare_pages};
40
41 /// # Safety
42 /// Actually not unsafe for targets other then aarch64
43 #[cfg(not(target_arch = "aarch64"))]
mmio_map_region(_paddr: usize, _size: usize) -> Result<(), LkError>44 pub unsafe fn mmio_map_region(_paddr: usize, _size: usize) -> Result<(), LkError> {
45 Err(LkError::ERR_NOT_SUPPORTED)
46 }
47
48 /// # Safety
49 /// - paddr must be a valid physical address
50 /// - paddr + size must be a valid physical address
51 /// - the caller must be aware that after the call the [paddr .. paddr + size] memory
52 /// is available for reading by the host.
53 #[no_mangle]
hypervisor_mmio_map_region(paddr: paddr_t, size: usize) -> c_int54 pub unsafe extern "C" fn hypervisor_mmio_map_region(paddr: paddr_t, size: usize) -> c_int {
55 crate::mmio_map_region(paddr, size).err().unwrap_or(LkError::NO_ERROR).into()
56 }
57