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diff --git a/src/kvm_rs/vcpu.rs.html b/src/kvm_rs/vcpu.rs.html new file mode 100644 index 0000000..df4a7bc --- /dev/null +++ b/src/kvm_rs/vcpu.rs.html @@ -0,0 +1,279 @@ +<!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 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+<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</span>::<span class="ident">fs</span>; +<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">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"><</span><span class="lifetime">'cpu</span><span class="op">></span> { + <span class="ident">Halt</span>, + <span class="ident">IoIn</span>(<span class="ident">u16</span>, <span class="kw-2">&</span><span class="lifetime">'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">&</span><span class="lifetime">'cpu</span> [<span class="ident">u8</span>]), + <span class="ident">MmioRead</span>(<span class="ident">u64</span>, <span class="kw-2">&</span><span class="lifetime">'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">&</span><span class="lifetime">'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</span>::<span class="ident">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</span>::<span class="ident">File</span>, <span class="ident">kvm_run</span>: <span class="ident">KvmRun</span>) <span class="op">-</span><span class="op">></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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">kvm_sys</span>::<span class="ident">kvm_regs</span><span class="op">></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</span>::<span class="ident">kvm_regs</span>::<span class="ident">default</span>(); + <span class="ident">ioctl</span>( + <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vcpu</span>, + <span class="ident">kvm_sys</span>::<span class="ident">KVM_GET_REGS</span>, + <span class="kw-2">&</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">&</span><span class="self">self</span>, <span class="ident">regs</span>: <span class="ident">kvm_sys</span>::<span class="ident">kvm_regs</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { + <span class="ident">ioctl</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vcpu</span>, <span class="ident">kvm_sys</span>::<span class="ident">KVM_SET_REGS</span>, <span class="kw-2">&</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">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">kvm_sys</span>::<span class="ident">kvm_sregs</span><span class="op">></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</span>::<span class="ident">kvm_sregs</span>::<span class="ident">default</span>(); + <span class="ident">ioctl</span>( + <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vcpu</span>, + <span class="ident">kvm_sys</span>::<span class="ident">KVM_GET_SREGS</span>, + <span class="kw-2">&</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">&</span><span class="self">self</span>, <span class="ident">sregs</span>: <span class="ident">kvm_sys</span>::<span class="ident">kvm_sregs</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { + <span class="ident">ioctl</span>( + <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vcpu</span>, + <span class="ident">kvm_sys</span>::<span class="ident">KVM_SET_SREGS</span>, + <span class="kw-2">&</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">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">KvmExit</span><span class="op"><</span><span class="lifetime">'_</span><span class="op">></span><span class="op">></span> { + <span class="ident">ioctl</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vcpu</span>, <span class="ident">kvm_sys</span>::<span class="ident">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</span>::<span class="ident">KVM_EXIT_HLT</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit</span>::<span class="ident">Halt</span>), + <span class="ident">kvm_sys</span>::<span class="ident">KVM_EXIT_IO</span> <span class="op">=</span><span class="op">></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</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">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</span>::<span class="ident">slice</span>::<span class="ident">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</span>::<span class="ident">KVM_EXIT_IO_IN</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit</span>::<span class="ident">IoIn</span>(<span class="ident">io</span>.<span class="ident">port</span>, <span class="ident">data</span>)), + <span class="ident">kvm_sys</span>::<span class="ident">KVM_EXIT_IO_OUT</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit</span>::<span class="ident">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">></span> <span class="macro">unreachable</span><span class="macro">!</span>(), + } + } + <span class="ident">kvm_sys</span>::<span class="ident">KVM_EXIT_MMIO</span> <span class="op">=</span><span class="op">></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">&</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">></span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit</span>::<span class="ident">MmioRead</span>(<span class="ident">mmio</span>.<span class="ident">phys_addr</span>, <span class="kw-2">&</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">></span> <span class="prelude-val">Ok</span>(<span class="ident">KvmExit</span>::<span class="ident">MmioWrite</span>(<span class="ident">mmio</span>.<span class="ident">phys_addr</span>, <span class="kw-2">&</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">></span> <span class="macro">unreachable</span><span class="macro">!</span>(), + } + } + <span class="ident">r</span> @ <span class="kw">_</span> <span class="op">=</span><span class="op">></span> { + <span class="macro">todo</span><span class="macro">!</span>(<span class="string">"KVM_EXIT_... (exit_reason={}) not implemented!"</span>, <span class="ident">r</span>) + } + } + } +} +</pre></div> +</section><section id="search" class="content hidden"></section><section class="footer"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="kvm_rs" data-search-js="../../search-index.js"></div> + <script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script></body></html>
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