src/kvm_rs/vm.rs.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143

<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/vm.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>vm.rs - source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css"  id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
<link rel="alternate icon" type="image/png" href="../../favicon-16x16.png">
<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">&#9776;</div><a href='../../kvm_rs/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1"> 1</span>
<span id="2"> 2</span>
<span id="3"> 3</span>
<span id="4"> 4</span>
<span id="5"> 5</span>
<span id="6"> 6</span>
<span id="7"> 7</span>
<span id="8"> 8</span>
<span id="9"> 9</span>
<span id="10">10</span>
<span id="11">11</span>
<span id="12">12</span>
<span id="13">13</span>
<span id="14">14</span>
<span id="15">15</span>
<span id="16">16</span>
<span id="17">17</span>
<span id="18">18</span>
<span id="19">19</span>
<span id="20">20</span>
<span id="21">21</span>
<span id="22">22</span>
<span id="23">23</span>
<span id="24">24</span>
<span id="25">25</span>
<span id="26">26</span>
<span id="27">27</span>
<span id="28">28</span>
<span id="29">29</span>
<span id="30">30</span>
<span id="31">31</span>
<span id="32">32</span>
<span id="33">33</span>
<span id="34">34</span>
<span id="35">35</span>
<span id="36">36</span>
<span id="37">37</span>
<span id="38">38</span>
<span id="39">39</span>
<span id="40">40</span>
<span id="41">41</span>
<span id="42">42</span>
<span id="43">43</span>
<span id="44">44</span>
<span id="45">45</span>
<span id="46">46</span>
<span id="47">47</span>
<span id="48">48</span>
<span id="49">49</span>
<span id="50">50</span>
<span id="51">51</span>
<span id="52">52</span>
<span id="53">53</span>
<span id="54">54</span>
<span id="55">55</span>
<span id="56">56</span>
<span id="57">57</span>
<span id="58">58</span>
<span id="59">59</span>
<span id="60">60</span>
<span id="61">61</span>
<span id="62">62</span>
<span id="63">63</span>
<span id="64">64</span>
<span id="65">65</span>
<span id="66">66</span>
<span id="67">67</span>
<span id="68">68</span>
<span id="69">69</span>
</pre><pre class="rust">
<span class="doccomment">//! VM system ioctls.</span>

<span class="kw">use</span> <span class="ident">std::fs</span>;
<span class="kw">use</span> <span class="ident">std::io</span>;
<span class="kw">use</span> <span class="ident">std::os::unix::io::FromRawFd</span>;

<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::vcpu::Vcpu</span>;
<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">ioctl</span>, <span class="ident">kvm_sys</span>, <span class="ident">KvmRun</span>, <span class="ident">PhysAddr</span>, <span class="ident">UserMem</span>};

<span class="doccomment">/// Wrapper for VM ioctls.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Representation of the file descriptor obtained by the [`KVM_CREATE_VM`][kvm-create-vm] ioctl.</span>
<span class="doccomment">/// This wrapper provides access to the `VM ioctls` as described in [KVM API][kvm].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [kvm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#general-description</span>
<span class="doccomment">/// [kvm-create-vm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vm</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Vm</span> {
    <span class="ident">vm</span>: <span class="ident">fs::File</span>,
    <span class="ident">vcpu_mmap_size</span>: <span class="ident">usize</span>,
}

<span class="kw">impl</span> <span class="ident">Vm</span> {
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">vm</span>: <span class="ident">fs::File</span>, <span class="ident">vcpu_mmap_size</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vm</span> {
        <span class="ident">Vm</span> { <span class="ident">vm</span>, <span class="ident">vcpu_mmap_size</span> }
    }

    <span class="doccomment">/// Map memory from userspace into the VM as `guest physical` memory starting at address</span>
    <span class="doccomment">/// `phys_addr`.</span>
    <span class="doccomment">/// The underlying operation is the [`KVM_SET_USER_MEMORY_REGION`][kmv-set-user-memory-region]</span>
    <span class="doccomment">/// ioctl.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// # Safety</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// The `mem: &amp;UserMem` argument passed to this function must at least live as long the `Vcpu`</span>
    <span class="doccomment">/// instance.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-set-user-memory-region]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-user-memory-region</span>
    <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">set_user_memory_region</span>(
        <span class="kw-2">&amp;</span><span class="self">self</span>,
        <span class="ident">phys_addr</span>: <span class="ident">PhysAddr</span>,
        <span class="ident">mem</span>: <span class="kw-2">&amp;</span><span class="ident">UserMem</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
        <span class="comment">// Create guest physical memory mapping for `slot : 0` at guest `phys_addr`.</span>
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">kvm_mem</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_userspace_memory_region::default</span>();
        <span class="ident">kvm_mem</span>.<span class="ident">userspace_addr</span> <span class="op">=</span> <span class="ident">mem</span>.<span class="ident">ptr</span> <span class="kw">as</span> <span class="ident">u64</span>;
        <span class="ident">kvm_mem</span>.<span class="ident">memory_size</span> <span class="op">=</span> <span class="ident">mem</span>.<span class="ident">len</span> <span class="kw">as</span> <span class="ident">u64</span>;
        <span class="ident">kvm_mem</span>.<span class="ident">guest_phys_addr</span> <span class="op">=</span> <span class="ident">phys_addr</span>.<span class="number">0</span>;

        <span class="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vm</span>,
            <span class="ident">kvm_sys::KVM_SET_USER_MEMORY_REGION</span>,
            <span class="kw-2">&amp;</span><span class="ident">kvm_mem</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>,
        )
        .<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ())
    }

    <span class="doccomment">/// Create a new virtual cpu with the [`KVM_CREATE_VCPU`][kvm-create-vcpu] ioctl.</span>
    <span class="doccomment">/// Returns a wrapper [`vcpu::Vcpu`][crate::vcpu::Vcpu] representing the VCPU.</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-create-vcpu]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vcpu</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">create_vpcu</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">id</span>: <span class="ident">u64</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">Vcpu</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">vcpu</span> <span class="op">=</span> <span class="ident">ioctl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vm</span>, <span class="ident">kvm_sys::KVM_CREATE_VCPU</span>, <span class="ident">id</span>)
            .<span class="ident">map</span>(<span class="op">|</span><span class="ident">fd</span><span class="op">|</span> <span class="kw">unsafe</span> { <span class="ident">fs::File::from_raw_fd</span>(<span class="ident">fd</span>) })<span class="question-mark">?</span>;

        <span class="kw">let</span> <span class="ident">kvm_run</span> <span class="op">=</span> <span class="ident">KvmRun::new</span>(<span class="kw-2">&amp;</span><span class="ident">vcpu</span>, <span class="self">self</span>.<span class="ident">vcpu_mmap_size</span>)<span class="question-mark">?</span>;

        <span class="prelude-val">Ok</span>(<span class="ident">Vcpu::new</span>(<span class="ident">vcpu</span>, <span class="ident">kvm_run</span>))
    }
}
</pre></div>
</section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="kvm_rs" data-search-index-js="../../search-index.js" data-search-js="../../search.js"></div><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script></body></html>