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

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1166 existing lines in 29 files now uncovered.

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/alioth/src/vfio/iommu.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::fs::File;
use std::mem::size_of;
use std::os::fd::AsRawFd;
use std::path::Path;
use std::sync::Arc;

use snafu::ResultExt;

use crate::errors::BoxTrace;
use crate::mem::mapped::ArcMemPages;
use crate::mem::{self, LayoutChanged};
use crate::vfio::bindings::{
    IommuDestroy, IommuIoasAlloc, IommuIoasMap, IommuIoasMapFlag, IommuIoasUnmap,
};
use crate::vfio::ioctls::{iommu_destroy, iommu_ioas_alloc, iommu_ioas_map, iommu_ioas_unmap};
use crate::vfio::{Result, error};

#[derive(Debug)]
pub struct Iommu {
    pub(super) fd: File,
}

impl Iommu {
    pub fn new(path: impl AsRef<Path>) -> Result<Self> {
        let fd = File::open(&path).context(error::AccessDevice {
            path: path.as_ref(),
        })?;
        Ok(Iommu { fd })
    }
}

#[derive(Debug)]
pub struct Ioas {
    pub(super) iommu: Arc<Iommu>,
    pub(super) id: u32,
}

impl Drop for Ioas {
    fn drop(&mut self) {
        if let Err(e) = self.reset() {
            log::error!("Removing mappings from ioas id {:#x}: {e}", self.id)
        }
        let destroy = IommuDestroy {
            size: size_of::<IommuDestroy>() as u32,
            id: self.id,
        };
        let ret = unsafe { iommu_destroy(&self.iommu.fd, &destroy) };
        if let Err(e) = ret {
            log::error!("Destroying ioas id {:#x}: {e}", self.id)
        }
    }
}

impl Ioas {
    pub fn alloc_on(iommu: Arc<Iommu>) -> Result<Self> {
        let mut alloc: IommuIoasAlloc = IommuIoasAlloc {
            size: size_of::<IommuIoasAlloc>() as u32,
            ..Default::default()
        };
        unsafe { iommu_ioas_alloc(&iommu.fd, &mut alloc) }?;
        Ok(Ioas {
            iommu,
            id: alloc.out_ioas_id,
        })
    }

    pub fn map(&self, user_va: usize, iova: u64, len: u64) -> Result<()> {
        let flags =
            IommuIoasMapFlag::READABLE | IommuIoasMapFlag::WRITEABLE | IommuIoasMapFlag::FIXED_IOVA;
        let ioas_map = IommuIoasMap {
            size: size_of::<IommuIoasMap>() as u32,
            flags,
            ioas_id: self.id,
            user_va: user_va as u64,
            length: len,
            iova,
            ..Default::default()
        };
        unsafe { iommu_ioas_map(&self.iommu.fd, &ioas_map) }?;
        log::debug!(
            "ioas-{}-{}: mapped: {iova:#018x} -> {user_va:#018x}, size = {len:#x}",
            self.iommu.fd.as_raw_fd(),
            self.id
        );
        Ok(())
    }

    pub fn unmap(&self, iova: u64, len: u64) -> Result<()> {
        let ioas_unmap = IommuIoasUnmap {
            size: size_of::<IommuIoasUnmap>() as u32,
            ioas_id: self.id,
            iova,
            length: len,
        };
        unsafe { iommu_ioas_unmap(&self.iommu.fd, &ioas_unmap) }?;
        log::debug!(
            "ioas-{}-{}: unmapped: {iova:#018x}, size = {len:#x}",
            self.iommu.fd.as_raw_fd(),
            self.id,
        );
        Ok(())
    }

    pub fn reset(&self) -> Result<()> {
        self.unmap(0, u64::MAX)
    }
}

#[derive(Debug)]
pub struct UpdateIommuIoas {
    pub ioas: Arc<Ioas>,
}

impl LayoutChanged for UpdateIommuIoas {
    fn ram_added(&self, gpa: u64, pages: &ArcMemPages) -> mem::Result<()> {
        let ret = self.ioas.map(pages.addr(), gpa, pages.size());
        ret.box_trace(mem::error::ChangeLayout)?;
        Ok(())
    }

    fn ram_removed(&self, gpa: u64, pages: &ArcMemPages) -> mem::Result<()> {
        let ret = self.ioas.unmap(gpa, pages.size());
        ret.box_trace(mem::error::ChangeLayout)?;
        Ok(())
    }
}

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::fs::File;
16	use std::mem::size_of;
17	use std::os::fd::AsRawFd;
18	use std::path::Path;
19	use std::sync::Arc;
20
21	use snafu::ResultExt;
22
23	use crate::errors::BoxTrace;
24	use crate::mem::mapped::ArcMemPages;
25	use crate::mem::{self, LayoutChanged};
26	use crate::vfio::bindings::{
27	IommuDestroy, IommuIoasAlloc, IommuIoasMap, IommuIoasMapFlag, IommuIoasUnmap,
28	};
29	use crate::vfio::ioctls::{iommu_destroy, iommu_ioas_alloc, iommu_ioas_map, iommu_ioas_unmap};
30	use crate::vfio::{Result, error};
31
32	#[derive(Debug)]
33	pub struct Iommu {
34	pub(super) fd: File,
35	}
36
37	impl Iommu {
38	pub fn new(path: impl AsRef<Path>) -> Result<Self> {	×
39	let fd = File::open(&path).context(error::AccessDevice {	×
40	path: path.as_ref(),	×
41	})?;
42	Ok(Iommu { fd })	×
43	}
44	}
45
46	#[derive(Debug)]
47	pub struct Ioas {
48	pub(super) iommu: Arc<Iommu>,
49	pub(super) id: u32,
50	}
51
52	impl Drop for Ioas {
UNCOV 53	fn drop(&mut self) {
UNCOV 54	if let Err(e) = self.reset() {
UNCOV 55	log::error!("Removing mappings from ioas id {:#x}: {e}", self.id)
56	}
57	let destroy = IommuDestroy {
UNCOV 58	size: size_of::<IommuDestroy>() as u32,
UNCOV 59	id: self.id,
60	};
UNCOV 61	let ret = unsafe { iommu_destroy(&self.iommu.fd, &destroy) };
UNCOV 62	if let Err(e) = ret {
UNCOV 63	log::error!("Destroying ioas id {:#x}: {e}", self.id)
64	}
65	}
66	}
67
68	impl Ioas {
UNCOV 69	pub fn alloc_on(iommu: Arc<Iommu>) -> Result<Self> {
70	let mut alloc: IommuIoasAlloc = IommuIoasAlloc {
UNCOV 71	size: size_of::<IommuIoasAlloc>() as u32,
72	..Default::default()
73	};
UNCOV 74	unsafe { iommu_ioas_alloc(&iommu.fd, &mut alloc) }?;
UNCOV 75	Ok(Ioas {
UNCOV 76	iommu,
UNCOV 77	id: alloc.out_ioas_id,
78	})
79	}
80
UNCOV 81	pub fn map(&self, user_va: usize, iova: u64, len: u64) -> Result<()> {
UNCOV 82	let flags =
UNCOV 83	IommuIoasMapFlag::READABLE \| IommuIoasMapFlag::WRITEABLE \| IommuIoasMapFlag::FIXED_IOVA;
84	let ioas_map = IommuIoasMap {
UNCOV 85	size: size_of::<IommuIoasMap>() as u32,
86	flags,
UNCOV 87	ioas_id: self.id,
UNCOV 88	user_va: user_va as u64,
89	length: len,
90	iova,
91	..Default::default()
92	};
UNCOV 93	unsafe { iommu_ioas_map(&self.iommu.fd, &ioas_map) }?;
UNCOV 94	log::debug!(
UNCOV 95	"ioas-{}-{}: mapped: {iova:#018x} -> {user_va:#018x}, size = {len:#x}",
UNCOV 96	self.iommu.fd.as_raw_fd(),
97	self.id
98	);
UNCOV 99	Ok(())
100	}
101
UNCOV 102	pub fn unmap(&self, iova: u64, len: u64) -> Result<()> {
103	let ioas_unmap = IommuIoasUnmap {
UNCOV 104	size: size_of::<IommuIoasUnmap>() as u32,
UNCOV 105	ioas_id: self.id,
106	iova,
107	length: len,
108	};
UNCOV 109	unsafe { iommu_ioas_unmap(&self.iommu.fd, &ioas_unmap) }?;
UNCOV 110	log::debug!(
UNCOV 111	"ioas-{}-{}: unmapped: {iova:#018x}, size = {len:#x}",
UNCOV 112	self.iommu.fd.as_raw_fd(),
113	self.id,
114	);
UNCOV 115	Ok(())
116	}
117
UNCOV 118	pub fn reset(&self) -> Result<()> {
UNCOV 119	self.unmap(0, u64::MAX)
120	}
121	}
122
123	#[derive(Debug)]
124	pub struct UpdateIommuIoas {
125	pub ioas: Arc<Ioas>,
126	}
127
128	impl LayoutChanged for UpdateIommuIoas {
UNCOV 129	fn ram_added(&self, gpa: u64, pages: &ArcMemPages) -> mem::Result<()> {
UNCOV 130	let ret = self.ioas.map(pages.addr(), gpa, pages.size());
UNCOV 131	ret.box_trace(mem::error::ChangeLayout)?;
UNCOV 132	Ok(())
133	}
134
UNCOV 135	fn ram_removed(&self, gpa: u64, pages: &ArcMemPages) -> mem::Result<()> {
UNCOV 136	let ret = self.ioas.unmap(gpa, pages.size());
UNCOV 137	ret.box_trace(mem::error::ChangeLayout)?;
UNCOV 138	Ok(())
139	}
140	}

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