17385686062

Committed 01 Sep 2025 07:20PM UTC coverage: 18.016% (-0.1%) from 18.149%

Build # 17385686062

Build Type

Pull #281

github

Committed by

web-flow

Commit Message

Merge f6f978f6a into 6ec9a6d6b

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

Run Details

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1323 existing lines in 30 files now uncovered.

1362 of 7560 relevant lines covered (18.02%)

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/alioth/src/vfio/cdev.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::fmt::Debug;
use std::fs::{File, OpenOptions};
use std::mem::size_of;
use std::os::fd::AsRawFd;
use std::path::Path;
use std::sync::Arc;

use snafu::ResultExt;

use crate::vfio::bindings::{
    VfioDeviceAttachIommufdPt, VfioDeviceBindIommufd, VfioDeviceDetachIommufdPt,
};
use crate::vfio::device::Device;
use crate::vfio::ioctls::{
    vfio_device_attach_iommufd_pt, vfio_device_bind_iommufd, vfio_device_detach_iommufd_pt,
};
use crate::vfio::iommu::Ioas;
use crate::vfio::{Result, error};

#[derive(Debug)]
pub struct Cdev {
    fd: File,
    ioas: Option<Arc<Ioas>>,
}

impl Cdev {
    pub fn new(path: impl AsRef<Path>) -> Result<Self> {
        let fd = OpenOptions::new()
            .read(true)
            .write(true)
            .open(&path)
            .context(error::AccessDevice {
                path: path.as_ref(),
            })?;
        Ok(Cdev { fd, ioas: None })
    }
}

impl Cdev {
    pub fn attach_iommu_ioas(&mut self, ioas: Arc<Ioas>) -> Result<()> {
        let bind = VfioDeviceBindIommufd {
            argsz: size_of::<VfioDeviceBindIommufd>() as u32,
            iommufd: ioas.iommu.fd.as_raw_fd(),
            ..Default::default()
        };
        unsafe { vfio_device_bind_iommufd(&self.fd, &bind) }?;
        let attach = VfioDeviceAttachIommufdPt {
            argsz: size_of::<VfioDeviceAttachIommufdPt>() as u32,
            pt_id: ioas.id,
            ..Default::default()
        };
        unsafe { vfio_device_attach_iommufd_pt(&self.fd, &attach) }?;
        self.ioas.replace(ioas);
        Ok(())
    }

    pub fn detach_iommu_ioas(&mut self) -> Result<()> {
        if self.ioas.is_none() {
            return Ok(());
        };
        let detach = VfioDeviceDetachIommufdPt {
            argsz: size_of::<VfioDeviceDetachIommufdPt>() as u32,
            flags: 0,
        };
        unsafe { vfio_device_detach_iommufd_pt(&self.fd, &detach) }?;
        self.ioas = None;
        Ok(())
    }
}

impl Device for Cdev {
    fn fd(&self) -> &File {
        &self.fd
    }
}

impl Drop for Cdev {
    fn drop(&mut self) {
        if let Err(e) = self.detach_iommu_ioas() {
            log::error!("Cdev-{}: detaching ioas: {e:?}", self.fd.as_raw_fd())
        }
    }
}

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::fmt::Debug;
16	use std::fs::{File, OpenOptions};
17	use std::mem::size_of;
18	use std::os::fd::AsRawFd;
19	use std::path::Path;
20	use std::sync::Arc;
21
22	use snafu::ResultExt;
23
24	use crate::vfio::bindings::{
25	VfioDeviceAttachIommufdPt, VfioDeviceBindIommufd, VfioDeviceDetachIommufdPt,
26	};
27	use crate::vfio::device::Device;
28	use crate::vfio::ioctls::{
29	vfio_device_attach_iommufd_pt, vfio_device_bind_iommufd, vfio_device_detach_iommufd_pt,
30	};
31	use crate::vfio::iommu::Ioas;
32	use crate::vfio::{Result, error};
33
34	#[derive(Debug)]
35	pub struct Cdev {
36	fd: File,
37	ioas: Option<Arc<Ioas>>,
38	}
39
40	impl Cdev {
41	pub fn new(path: impl AsRef<Path>) -> Result<Self> {	×
42	let fd = OpenOptions::new()	×
43	.read(true)
44	.write(true)
45	.open(&path)	×
46	.context(error::AccessDevice {	×
47	path: path.as_ref(),	×
48	})?;
49	Ok(Cdev { fd, ioas: None })	×
50	}
51	}
52
53	impl Cdev {
UNCOV 54	pub fn attach_iommu_ioas(&mut self, ioas: Arc<Ioas>) -> Result<()> {
55	let bind = VfioDeviceBindIommufd {
UNCOV 56	argsz: size_of::<VfioDeviceBindIommufd>() as u32,
UNCOV 57	iommufd: ioas.iommu.fd.as_raw_fd(),
58	..Default::default()
59	};
UNCOV 60	unsafe { vfio_device_bind_iommufd(&self.fd, &bind) }?;
61	let attach = VfioDeviceAttachIommufdPt {
UNCOV 62	argsz: size_of::<VfioDeviceAttachIommufdPt>() as u32,
UNCOV 63	pt_id: ioas.id,
64	..Default::default()
65	};
UNCOV 66	unsafe { vfio_device_attach_iommufd_pt(&self.fd, &attach) }?;
UNCOV 67	self.ioas.replace(ioas);
UNCOV 68	Ok(())
69	}
70
UNCOV 71	pub fn detach_iommu_ioas(&mut self) -> Result<()> {
UNCOV 72	if self.ioas.is_none() {
UNCOV 73	return Ok(());
74	};
75	let detach = VfioDeviceDetachIommufdPt {
UNCOV 76	argsz: size_of::<VfioDeviceDetachIommufdPt>() as u32,
77	flags: 0,
78	};
UNCOV 79	unsafe { vfio_device_detach_iommufd_pt(&self.fd, &detach) }?;
UNCOV 80	self.ioas = None;
UNCOV 81	Ok(())
82	}
83	}
84
85	impl Device for Cdev {
UNCOV 86	fn fd(&self) -> &File {
UNCOV 87	&self.fd
88	}
89	}
90
91	impl Drop for Cdev {
UNCOV 92	fn drop(&mut self) {
UNCOV 93	if let Err(e) = self.detach_iommu_ioas() {
UNCOV 94	log::error!("Cdev-{}: detaching ioas: {e:?}", self.fd.as_raw_fd())
95	}
96	}
97	}

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