17385983897

Committed 01 Sep 2025 07:41PM UTC coverage: 18.009% (-0.1%) from 18.149%

Build # 17385983897

Build Type

Pull #281

github

Committed by

web-flow

Commit Message

Merge 782c57b11 into 6ec9a6d6b

Pull Request Pull Request #281: Port to Apple Hypervisor framework

Run Details

0 of 154 new or added lines in 11 files covered. (0.0%)

1166 existing lines in 29 files now uncovered.

1362 of 7563 relevant lines covered (18.01%)

18.77 hits per line

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0.0

/alioth/src/hv/kvm/device.rs

// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::mem::{MaybeUninit, size_of_val};
use std::os::fd::{AsFd, BorrowedFd, FromRawFd, OwnedFd};

use snafu::ResultExt;

use crate::hv::kvm::bindings::{KvmCreateDevice, KvmDevType, KvmDeviceAttr};
use crate::hv::kvm::ioctls::{kvm_create_device, kvm_get_device_attr, kvm_set_device_attr};
use crate::hv::kvm::kvm_error;
use crate::hv::{KvmError, Result};

#[derive(Debug)]
pub(super) struct KvmDevice(pub OwnedFd);

impl KvmDevice {
    pub fn new(vm_fd: &impl AsFd, type_: KvmDevType) -> Result<KvmDevice, KvmError> {
        let mut create_device = KvmCreateDevice {
            type_,
            fd: 0,
            flags: 0,
        };
        unsafe { kvm_create_device(vm_fd, &mut create_device) }
            .context(kvm_error::CreateDevice { type_ })?;
        Ok(KvmDevice(unsafe { OwnedFd::from_raw_fd(create_device.fd) }))
    }
}

impl AsFd for KvmDevice {
    fn as_fd(&self) -> BorrowedFd<'_> {
        self.0.as_fd()
    }
}

impl KvmDevice {
    pub fn set_attr<T>(&self, group: u32, attr: u64, val: &T) -> Result<(), KvmError> {
        let attr = KvmDeviceAttr {
            group,
            attr,
            addr: if size_of_val(val) == 0 {
                0
            } else {
                val as *const _ as _
            },
            _flags: 0,
        };
        unsafe { kvm_set_device_attr(self, &attr) }.context(kvm_error::DeviceAttr)?;
        Ok(())
    }

    pub fn get_attr<T>(&self, group: u32, attr: u64) -> Result<T, KvmError> {
        let mut val = MaybeUninit::uninit();
        let attr = KvmDeviceAttr {
            group,
            attr,
            addr: val.as_mut_ptr() as _,
            _flags: 0,
        };
        unsafe { kvm_get_device_attr(self, &attr) }.context(kvm_error::DeviceAttr)?;
        Ok(unsafe { val.assume_init() })
    }
}

1	// Copyright 2024 Google LLC
2	//
3	// Licensed under the Apache License, Version 2.0 (the "License");
4	// you may not use this file except in compliance with the License.
5	// You may obtain a copy of the License at
6	//
7	// https://www.apache.org/licenses/LICENSE-2.0
8	//
9	// Unless required by applicable law or agreed to in writing, software
10	// distributed under the License is distributed on an "AS IS" BASIS,
11	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12	// See the License for the specific language governing permissions and
13	// limitations under the License.
14
15	use std::mem::{MaybeUninit, size_of_val};
16	use std::os::fd::{AsFd, BorrowedFd, FromRawFd, OwnedFd};
17
18	use snafu::ResultExt;
19
20	use crate::hv::kvm::bindings::{KvmCreateDevice, KvmDevType, KvmDeviceAttr};
21	use crate::hv::kvm::ioctls::{kvm_create_device, kvm_get_device_attr, kvm_set_device_attr};
22	use crate::hv::kvm::kvm_error;
23	use crate::hv::{KvmError, Result};
24
25	#[derive(Debug)]
26	pub(super) struct KvmDevice(pub OwnedFd);
27
28	impl KvmDevice {
UNCOV 29	pub fn new(vm_fd: &impl AsFd, type_: KvmDevType) -> Result<KvmDevice, KvmError> {
30	let mut create_device = KvmCreateDevice {
31	type_,
32	fd: 0,
33	flags: 0,
34	};
UNCOV 35	unsafe { kvm_create_device(vm_fd, &mut create_device) }
UNCOV 36	.context(kvm_error::CreateDevice { type_ })?;
UNCOV 37	Ok(KvmDevice(unsafe { OwnedFd::from_raw_fd(create_device.fd) }))
38	}
39	}
40
41	impl AsFd for KvmDevice {
UNCOV 42	fn as_fd(&self) -> BorrowedFd<'_> {
UNCOV 43	self.0.as_fd()
44	}
45	}
46
47	impl KvmDevice {
48	pub fn set_attr<T>(&self, group: u32, attr: u64, val: &T) -> Result<(), KvmError> {	×
49	let attr = KvmDeviceAttr {
50	group,
51	attr,
52	addr: if size_of_val(val) == 0 {	×
53	0
54	} else {
55	val as *const _ as _
56	},
57	_flags: 0,
58	};
59	unsafe { kvm_set_device_attr(self, &attr) }.context(kvm_error::DeviceAttr)?;	×
60	Ok(())	×
61	}
62
63	pub fn get_attr<T>(&self, group: u32, attr: u64) -> Result<T, KvmError> {	×
64	let mut val = MaybeUninit::uninit();	×
65	let attr = KvmDeviceAttr {
66	group,
67	attr,
68	addr: val.as_mut_ptr() as _,	×
69	_flags: 0,
70	};
71	unsafe { kvm_get_device_attr(self, &attr) }.context(kvm_error::DeviceAttr)?;	×
72	Ok(unsafe { val.assume_init() })	×
73	}
74	}

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