18638570188

Committed 20 Oct 2025 12:38AM UTC coverage: 20.202% (-0.01%) from 20.213%

Build # 18638570188

Build Type

Pull #308

github

Committed by

web-flow

Commit Message

Merge 73a1640e9 into 416357998

Pull Request Pull Request #308: Add tests for PciSegment

Run Details

0 of 59 new or added lines in 5 files covered. (0.0%)

1163 existing lines in 25 files now uncovered.

1578 of 7811 relevant lines covered (20.2%)

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

#[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::kvm_error;
21	use crate::hv::{KvmError, Result};
22	use crate::sys::kvm::{
23	KvmCreateDevice, KvmDevType, KvmDeviceAttr, kvm_create_device, kvm_get_device_attr,
24	kvm_set_device_attr,
25	};
26
27	#[derive(Debug)]
28	pub(super) struct KvmDevice(pub OwnedFd);
29
30	impl KvmDevice {
UNCOV 31	pub fn new(vm_fd: &impl AsFd, type_: KvmDevType) -> Result<KvmDevice, KvmError> {
32	let mut create_device = KvmCreateDevice {
33	type_,
34	fd: 0,
35	flags: 0,
36	};
UNCOV 37	unsafe { kvm_create_device(vm_fd, &mut create_device) }
UNCOV 38	.context(kvm_error::CreateDevice { type_ })?;
UNCOV 39	Ok(KvmDevice(unsafe { OwnedFd::from_raw_fd(create_device.fd) }))
40	}
41	}
42
43	impl AsFd for KvmDevice {
UNCOV 44	fn as_fd(&self) -> BorrowedFd<'_> {
UNCOV 45	self.0.as_fd()
46	}
47	}
48
49	impl KvmDevice {
50	pub fn set_attr<T>(&self, group: u32, attr: u64, val: &T) -> Result<(), KvmError> {	×
51	let attr = KvmDeviceAttr {
52	group,
53	attr,
54	addr: if size_of_val(val) == 0 {	×
55	0
56	} else {
57	val as *const _ as _
58	},
59	_flags: 0,
60	};
61	unsafe { kvm_set_device_attr(self, &attr) }.context(kvm_error::DeviceAttr)?;	×
62	Ok(())	×
63	}
64
65	pub fn get_attr<T>(&self, group: u32, attr: u64) -> Result<T, KvmError> {	×
66	let mut val = MaybeUninit::uninit();	×
67	let attr = KvmDeviceAttr {
68	group,
69	attr,
70	addr: val.as_mut_ptr() as _,	×
71	_flags: 0,
72	};
73	unsafe { kvm_get_device_attr(self, &attr) }.context(kvm_error::DeviceAttr)?;	×
74	Ok(unsafe { val.assume_init() })	×
75	}
76	}

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