path: root/src/kvm_rs/vcpu.rs.html


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
<!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/vcpu.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>vcpu.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"><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" class="help-button">?</button>
                <a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><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>
<span id="70"> 70</span>
<span id="71"> 71</span>
<span id="72"> 72</span>
<span id="73"> 73</span>
<span id="74"> 74</span>
<span id="75"> 75</span>
<span id="76"> 76</span>
<span id="77"> 77</span>
<span id="78"> 78</span>
<span id="79"> 79</span>
<span id="80"> 80</span>
<span id="81"> 81</span>
<span id="82"> 82</span>
<span id="83"> 83</span>
<span id="84"> 84</span>
<span id="85"> 85</span>
<span id="86"> 86</span>
<span id="87"> 87</span>
<span id="88"> 88</span>
<span id="89"> 89</span>
<span id="90"> 90</span>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! VCPU 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="kw">crate</span>::{<span class="ident">ioctl</span>, <span class="ident">kvm_sys</span>, <span class="ident">KvmRun</span>};

<span class="doccomment">/// Exit reasons for the [`Vcpu::kvm_run`][crate::vcpu::Vcpu::kvm_run] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Details for the different exit reasons can be found in the [`kvm_run`</span>
<span class="doccomment">/// structure][kvm-run-struct] description.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [kvm-run]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-run</span>
<span class="doccomment">/// [kvm-run-struct]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#the-kvm-run-structure</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">KvmExit</span><span class="op">&lt;</span><span class="lifetime">&#39;cpu</span><span class="op">&gt;</span> {
    <span class="ident">Halt</span>,
    <span class="ident">IoIn</span>(<span class="ident">u16</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> <span class="kw-2">mut</span> [<span class="ident">u8</span>]),
    <span class="ident">IoOut</span>(<span class="ident">u16</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> [<span class="ident">u8</span>]),
    <span class="ident">MmioRead</span>(<span class="ident">u64</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> <span class="kw-2">mut</span> [<span class="ident">u8</span>]),
    <span class="ident">MmioWrite</span>(<span class="ident">u64</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> [<span class="ident">u8</span>]),
}

<span class="doccomment">/// Wrapper for VCPU ioctls.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Representation of the file descriptor obtained by the [`KVM_CREATE_VCPU`][kvm-create-vcpu] ioctl.</span>
<span class="doccomment">/// This wrapper provides access to the `VCPU 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-vcpu]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vcpu</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Vcpu</span> {
    <span class="ident">vcpu</span>: <span class="ident">fs::File</span>,
    <span class="ident">kvm_run</span>: <span class="ident">KvmRun</span>,
}

<span class="kw">impl</span> <span class="ident">Vcpu</span> {
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">vcpu</span>: <span class="ident">fs::File</span>, <span class="ident">kvm_run</span>: <span class="ident">KvmRun</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vcpu</span> {
        <span class="ident">Vcpu</span> { <span class="ident">vcpu</span>, <span class="ident">kvm_run</span> }
    }

    <span class="doccomment">/// Get the general purpose registers with the [`KVM_GET_REGS`][kvm-get-regs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_regs`](crate::kvm_sys::kvm_regs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-get-regs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-regs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_regs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">kvm_sys::kvm_regs</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">regs</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_regs::default</span>();
        <span class="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>,
            <span class="ident">kvm_sys::KVM_GET_REGS</span>,
            <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">regs</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>,
        )<span class="question-mark">?</span>;
        <span class="prelude-val">Ok</span>(<span class="ident">regs</span>)
    }

    <span class="doccomment">/// Set the general purpose registers with the [`KVM_SET_REGS`][kvm-set-regs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_regs`](crate::kvm_sys::kvm_regs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-set-regs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-regs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_regs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">regs</span>: <span class="ident">kvm_sys::kvm_regs</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="ident">ioctl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>, <span class="ident">kvm_sys::KVM_SET_REGS</span>, <span class="kw-2">&amp;</span><span class="ident">regs</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">/// Get the special registers with the [`KVM_GET_SREGS`][kvm-get-sregs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_sregs`](crate::kvm_sys::kvm_sregs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-get-sregs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-sregs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_sregs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">kvm_sys::kvm_sregs</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sregs</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_sregs::default</span>();
        <span class="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>,
            <span class="ident">kvm_sys::KVM_GET_SREGS</span>,
            <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">sregs</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>,
        )<span class="question-mark">?</span>;
        <span class="prelude-val">Ok</span>(<span class="ident">sregs</span>)
    }

    <span class="doccomment">/// Set the special registers with the [`KVM_SET_SREGS`][kvm-set-sregs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_sregs`](crate::kvm_sys::kvm_sregs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-set-sregs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-sregs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_sregs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">sregs</span>: <span class="ident">kvm_sys::kvm_sregs</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="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>,
            <span class="ident">kvm_sys::KVM_SET_SREGS</span>,
            <span class="kw-2">&amp;</span><span class="ident">sregs</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">/// Run the guest VCPU with the [`KVM_RUN`][kvm-run] ioctl until it exits with one of the exit</span>
    <span class="doccomment">/// reasons described in [`KvmExit`](crate::vcpu::KvmExit).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-run]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-run</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">run</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">KvmExit</span><span class="op">&lt;</span><span class="lifetime">&#39;_</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="ident">ioctl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>, <span class="ident">kvm_sys::KVM_RUN</span>, <span class="number">0</span>)<span class="question-mark">?</span>;

        <span class="kw">let</span> <span class="ident">kvm_run</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">kvm_run</span>.<span class="ident">as_mut</span>();

        <span class="kw">match</span> <span class="ident">kvm_run</span>.<span class="ident">exit_reason</span> <span class="kw">as</span> <span class="ident">u64</span> {
            <span class="ident">kvm_sys::KVM_EXIT_HLT</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::Halt</span>),
            <span class="ident">kvm_sys::KVM_EXIT_IO</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="comment">// Safe to use union `io` field, as Kernel instructed us to.</span>
                <span class="kw">let</span> <span class="ident">io</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">kvm_run</span>.<span class="ident">inner</span>.<span class="ident">io</span> };

                <span class="kw">let</span> <span class="ident">kvm_run_ptr</span> <span class="op">=</span> <span class="ident">kvm_run</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">kvm_sys::kvm_run</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">u8</span>;

                <span class="comment">// Create IO buffer located at `kvm_run + io.offset`.</span>
                <span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="kw">unsafe</span> {
                    <span class="ident">std::slice::from_raw_parts_mut</span>(
                        <span class="ident">kvm_run_ptr</span>.<span class="ident">offset</span>(<span class="ident">io</span>.<span class="ident">data_offset</span> <span class="kw">as</span> <span class="ident">isize</span>),
                        <span class="ident">io</span>.<span class="ident">count</span> <span class="comment">/* num blocks */</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">*</span> <span class="ident">io</span>.<span class="ident">size</span> <span class="comment">/* bytes per block */</span> <span class="kw">as</span> <span class="ident">usize</span>,
                    )
                };

                <span class="kw">match</span> <span class="ident">io</span>.<span class="ident">direction</span> <span class="kw">as</span> <span class="ident">u64</span> {
                    <span class="ident">kvm_sys::KVM_EXIT_IO_IN</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::IoIn</span>(<span class="ident">io</span>.<span class="ident">port</span>, <span class="ident">data</span>)),
                    <span class="ident">kvm_sys::KVM_EXIT_IO_OUT</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::IoOut</span>(<span class="ident">io</span>.<span class="ident">port</span>, <span class="ident">data</span>)),
                    <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable!</span>(),
                }
            }
            <span class="ident">kvm_sys::KVM_EXIT_MMIO</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="comment">// Safe to use union `mmio` filed, as Kernel instructed us to.</span>
                <span class="kw">let</span> <span class="ident">mmio</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">kvm_run</span>.<span class="ident">inner</span>.<span class="ident">mmio</span> };
                <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">mmio</span>.<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>;

                <span class="kw">match</span> <span class="ident">mmio</span>.<span class="ident">is_write</span> {
                    <span class="number">0</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::MmioRead</span>(<span class="ident">mmio</span>.<span class="ident">phys_addr</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">mmio</span>.<span class="ident">data</span>[..<span class="ident">len</span>])),
                    <span class="number">1</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::MmioWrite</span>(<span class="ident">mmio</span>.<span class="ident">phys_addr</span>, <span class="kw-2">&amp;</span><span class="ident">mmio</span>.<span class="ident">data</span>[..<span class="ident">len</span>])),
                    <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable!</span>(),
                }
            }
            <span class="ident">r</span> @ <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="macro">todo!</span>(<span class="string">&quot;KVM_EXIT_... (exit_reason={}) not implemented!&quot;</span>, <span class="ident">r</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>
<!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/vcpu.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>vcpu.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"><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" class="help-button">?</button>
                <a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><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>
<span id="70"> 70</span>
<span id="71"> 71</span>
<span id="72"> 72</span>
<span id="73"> 73</span>
<span id="74"> 74</span>
<span id="75"> 75</span>
<span id="76"> 76</span>
<span id="77"> 77</span>
<span id="78"> 78</span>
<span id="79"> 79</span>
<span id="80"> 80</span>
<span id="81"> 81</span>
<span id="82"> 82</span>
<span id="83"> 83</span>
<span id="84"> 84</span>
<span id="85"> 85</span>
<span id="86"> 86</span>
<span id="87"> 87</span>
<span id="88"> 88</span>
<span id="89"> 89</span>
<span id="90"> 90</span>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! VCPU 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="kw">crate</span>::{<span class="ident">ioctl</span>, <span class="ident">kvm_sys</span>, <span class="ident">KvmRun</span>};

<span class="doccomment">/// Exit reasons for the [`Vcpu::kvm_run`][crate::vcpu::Vcpu::kvm_run] function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Details for the different exit reasons can be found in the [`kvm_run`</span>
<span class="doccomment">/// structure][kvm-run-struct] description.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [kvm-run]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-run</span>
<span class="doccomment">/// [kvm-run-struct]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#the-kvm-run-structure</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">KvmExit</span><span class="op">&lt;</span><span class="lifetime">&#39;cpu</span><span class="op">&gt;</span> {
    <span class="ident">Halt</span>,
    <span class="ident">IoIn</span>(<span class="ident">u16</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> <span class="kw-2">mut</span> [<span class="ident">u8</span>]),
    <span class="ident">IoOut</span>(<span class="ident">u16</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> [<span class="ident">u8</span>]),
    <span class="ident">MmioRead</span>(<span class="ident">u64</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> <span class="kw-2">mut</span> [<span class="ident">u8</span>]),
    <span class="ident">MmioWrite</span>(<span class="ident">u64</span>, <span class="kw-2">&amp;</span><span class="lifetime">&#39;cpu</span> [<span class="ident">u8</span>]),
}

<span class="doccomment">/// Wrapper for VCPU ioctls.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Representation of the file descriptor obtained by the [`KVM_CREATE_VCPU`][kvm-create-vcpu] ioctl.</span>
<span class="doccomment">/// This wrapper provides access to the `VCPU 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-vcpu]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vcpu</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Vcpu</span> {
    <span class="ident">vcpu</span>: <span class="ident">fs::File</span>,
    <span class="ident">kvm_run</span>: <span class="ident">KvmRun</span>,
}

<span class="kw">impl</span> <span class="ident">Vcpu</span> {
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">vcpu</span>: <span class="ident">fs::File</span>, <span class="ident">kvm_run</span>: <span class="ident">KvmRun</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vcpu</span> {
        <span class="ident">Vcpu</span> { <span class="ident">vcpu</span>, <span class="ident">kvm_run</span> }
    }

    <span class="doccomment">/// Get the general purpose registers with the [`KVM_GET_REGS`][kvm-get-regs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_regs`](crate::kvm_sys::kvm_regs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-get-regs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-regs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_regs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">kvm_sys::kvm_regs</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">regs</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_regs::default</span>();
        <span class="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>,
            <span class="ident">kvm_sys::KVM_GET_REGS</span>,
            <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">regs</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>,
        )<span class="question-mark">?</span>;
        <span class="prelude-val">Ok</span>(<span class="ident">regs</span>)
    }

    <span class="doccomment">/// Set the general purpose registers with the [`KVM_SET_REGS`][kvm-set-regs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_regs`](crate::kvm_sys::kvm_regs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-set-regs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-regs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_regs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">regs</span>: <span class="ident">kvm_sys::kvm_regs</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="ident">ioctl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>, <span class="ident">kvm_sys::KVM_SET_REGS</span>, <span class="kw-2">&amp;</span><span class="ident">regs</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">/// Get the special registers with the [`KVM_GET_SREGS`][kvm-get-sregs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_sregs`](crate::kvm_sys::kvm_sregs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-get-sregs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-sregs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_sregs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">kvm_sys::kvm_sregs</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sregs</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_sregs::default</span>();
        <span class="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>,
            <span class="ident">kvm_sys::KVM_GET_SREGS</span>,
            <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">sregs</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>,
        )<span class="question-mark">?</span>;
        <span class="prelude-val">Ok</span>(<span class="ident">sregs</span>)
    }

    <span class="doccomment">/// Set the special registers with the [`KVM_SET_SREGS`][kvm-set-sregs] ioctl in form of</span>
    <span class="doccomment">/// [`kvm_sregs`](crate::kvm_sys::kvm_sregs).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-set-sregs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-sregs</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_sregs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">sregs</span>: <span class="ident">kvm_sys::kvm_sregs</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="ident">ioctl</span>(
            <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>,
            <span class="ident">kvm_sys::KVM_SET_SREGS</span>,
            <span class="kw-2">&amp;</span><span class="ident">sregs</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">/// Run the guest VCPU with the [`KVM_RUN`][kvm-run] ioctl until it exits with one of the exit</span>
    <span class="doccomment">/// reasons described in [`KvmExit`](crate::vcpu::KvmExit).</span>
    <span class="doccomment">///</span>
    <span class="doccomment">/// [kvm-run]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-run</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">run</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">io::Result</span><span class="op">&lt;</span><span class="ident">KvmExit</span><span class="op">&lt;</span><span class="lifetime">&#39;_</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="ident">ioctl</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">vcpu</span>, <span class="ident">kvm_sys::KVM_RUN</span>, <span class="number">0</span>)<span class="question-mark">?</span>;

        <span class="kw">let</span> <span class="ident">kvm_run</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">kvm_run</span>.<span class="ident">as_mut</span>();

        <span class="kw">match</span> <span class="ident">kvm_run</span>.<span class="ident">exit_reason</span> <span class="kw">as</span> <span class="ident">u64</span> {
            <span class="ident">kvm_sys::KVM_EXIT_HLT</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::Halt</span>),
            <span class="ident">kvm_sys::KVM_EXIT_IO</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="comment">// Safe to use union `io` field, as Kernel instructed us to.</span>
                <span class="kw">let</span> <span class="ident">io</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">kvm_run</span>.<span class="ident">inner</span>.<span class="ident">io</span> };

                <span class="kw">let</span> <span class="ident">kvm_run_ptr</span> <span class="op">=</span> <span class="ident">kvm_run</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">kvm_sys::kvm_run</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">u8</span>;

                <span class="comment">// Create IO buffer located at `kvm_run + io.offset`.</span>
                <span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="kw">unsafe</span> {
                    <span class="ident">std::slice::from_raw_parts_mut</span>(
                        <span class="ident">kvm_run_ptr</span>.<span class="ident">offset</span>(<span class="ident">io</span>.<span class="ident">data_offset</span> <span class="kw">as</span> <span class="ident">isize</span>),
                        <span class="ident">io</span>.<span class="ident">count</span> <span class="comment">/* num blocks */</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">*</span> <span class="ident">io</span>.<span class="ident">size</span> <span class="comment">/* bytes per block */</span> <span class="kw">as</span> <span class="ident">usize</span>,
                    )
                };

                <span class="kw">match</span> <span class="ident">io</span>.<span class="ident">direction</span> <span class="kw">as</span> <span class="ident">u64</span> {
                    <span class="ident">kvm_sys::KVM_EXIT_IO_IN</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::IoIn</span>(<span class="ident">io</span>.<span class="ident">port</span>, <span class="ident">data</span>)),
                    <span class="ident">kvm_sys::KVM_EXIT_IO_OUT</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::IoOut</span>(<span class="ident">io</span>.<span class="ident">port</span>, <span class="ident">data</span>)),
                    <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable!</span>(),
                }
            }
            <span class="ident">kvm_sys::KVM_EXIT_MMIO</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="comment">// Safe to use union `mmio` filed, as Kernel instructed us to.</span>
                <span class="kw">let</span> <span class="ident">mmio</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">kvm_run</span>.<span class="ident">inner</span>.<span class="ident">mmio</span> };
                <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">mmio</span>.<span class="ident">len</span> <span class="kw">as</span> <span class="ident">usize</span>;

                <span class="kw">match</span> <span class="ident">mmio</span>.<span class="ident">is_write</span> {
                    <span class="number">0</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::MmioRead</span>(<span class="ident">mmio</span>.<span class="ident">phys_addr</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">mmio</span>.<span class="ident">data</span>[..<span class="ident">len</span>])),
                    <span class="number">1</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::MmioWrite</span>(<span class="ident">mmio</span>.<span class="ident">phys_addr</span>, <span class="kw-2">&amp;</span><span class="ident">mmio</span>.<span class="ident">data</span>[..<span class="ident">len</span>])),
                    <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable!</span>(),
                }
            }
            <span class="ident">r</span> @ <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="macro">todo!</span>(<span class="string">&quot;KVM_EXIT_... (exit_reason={}) not implemented!&quot;</span>, <span class="ident">r</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>