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VCPU system ioctls.</span> +<!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`."><title>vcpu.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><link rel="preload" as="font" 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href="#198" id="198">198</a> +<a href="#199" id="199">199</a> +<a href="#200" id="200">200</a> +<a href="#201" id="201">201</a> +<a href="#202" id="202">202</a> +</pre></div><pre class="rust"><code><span class="doccomment">//! VCPU system ioctls. -<span class="kw">use</span> <span class="ident">std::fs</span>; -<span class="kw">use</span> <span class="ident">std::io</span>; +</span><span class="kw">use </span>std::fs; +<span class="kw">use </span>std::io; -<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="kw">use crate</span>::{ioctl, kvm_sys, KvmRun}; -<span class="doccomment">/// Exit reasons for the [`Vcpu::run`][crate::vcpu::Vcpu::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="ident">Debug</span>(<span class="ident">u64</span>), +<span class="doccomment">/// Exit reasons for the [`Vcpu::run`][crate::vcpu::Vcpu::run] function. +/// +/// Details for the different exit reasons can be found in the [`kvm_run` +/// structure][kvm-run-struct] description. +/// +/// [kvm-run]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-run +/// [kvm-run-struct]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#the-kvm-run-structure +</span><span class="kw">pub enum </span>KvmExit<<span class="lifetime">'cpu</span>> { + Halt, + IoIn(u16, <span class="kw-2">&</span><span class="lifetime">'cpu </span><span class="kw-2">mut </span>[u8]), + IoOut(u16, <span class="kw-2">&</span><span class="lifetime">'cpu </span>[u8]), + MmioRead(u64, <span class="kw-2">&</span><span class="lifetime">'cpu </span><span class="kw-2">mut </span>[u8]), + MmioWrite(u64, <span class="kw-2">&</span><span class="lifetime">'cpu </span>[u8]), + Debug(u64), } -<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="doccomment">/// Wrapper for VCPU ioctls. +/// +/// Representation of the file descriptor obtained by the [`KVM_CREATE_VCPU`][kvm-create-vcpu] ioctl. +/// This wrapper provides access to the `VCPU ioctls` as described in [KVM API][kvm]. +/// +/// [kvm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#general-description +/// [kvm-create-vcpu]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vcpu +</span><span class="kw">pub struct </span>Vcpu { + vcpu: fs::File, + kvm_run: KvmRun, } -<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="ident">Vcpu</span> { - <span class="ident">Vcpu</span> { <span class="ident">vcpu</span>, <span class="ident">kvm_run</span> } +<span class="kw">impl </span>Vcpu { + <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(vcpu: fs::File, kvm_run: KvmRun) -> Vcpu { + Vcpu { vcpu, kvm_run } } - <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="ident">io::Result</span><span class="op"><</span><span class="ident">kvm_sys::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::kvm_regs::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::KVM_GET_REGS</span>, - <span class="kw-2">&mut</span> <span class="ident">regs</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>, + <span class="doccomment">/// Get the general purpose registers with the [`KVM_GET_REGS`][kvm-get-regs] ioctl in form of + /// [`kvm_regs`](crate::kvm_sys::kvm_regs). + /// + /// [kvm-get-regs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-regs + </span><span class="kw">pub fn </span>get_regs(<span class="kw-2">&</span><span class="self">self</span>) -> io::Result<kvm_sys::kvm_regs> { + <span class="kw">let </span><span class="kw-2">mut </span>regs = kvm_sys::kvm_regs::default(); + ioctl( + <span class="kw-2">&</span><span class="self">self</span>.vcpu, + kvm_sys::KVM_GET_REGS, + <span class="kw-2">&mut </span>regs <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ as </span>u64, )<span class="question-mark">?</span>; - <span class="prelude-val">Ok</span>(<span class="ident">regs</span>) + <span class="prelude-val">Ok</span>(regs) } - <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::kvm_regs</span>) -> <span class="ident">io::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::KVM_SET_REGS</span>, <span class="kw-2">&</span><span class="ident">regs</span> <span class="kw">as</span> <span class="kw-2">*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">/// Set the general purpose registers with the [`KVM_SET_REGS`][kvm-set-regs] ioctl in form of + /// [`kvm_regs`](crate::kvm_sys::kvm_regs). + /// + /// [kvm-set-regs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-regs + </span><span class="kw">pub fn </span>set_regs(<span class="kw-2">&</span><span class="self">self</span>, regs: kvm_sys::kvm_regs) -> io::Result<()> { + ioctl(<span class="kw-2">&</span><span class="self">self</span>.vcpu, kvm_sys::KVM_SET_REGS, <span class="kw-2">&</span>regs <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>u64).map(|<span class="kw">_</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="ident">io::Result</span><span class="op"><</span><span class="ident">kvm_sys::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::kvm_sregs::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::KVM_GET_SREGS</span>, - <span class="kw-2">&mut</span> <span class="ident">sregs</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>, + <span class="doccomment">/// Get the special registers with the [`KVM_GET_SREGS`][kvm-get-sregs] ioctl in form of + /// [`kvm_sregs`](crate::kvm_sys::kvm_sregs). + /// + /// [kvm-get-sregs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-sregs + </span><span class="kw">pub fn </span>get_sregs(<span class="kw-2">&</span><span class="self">self</span>) -> io::Result<kvm_sys::kvm_sregs> { + <span class="kw">let </span><span class="kw-2">mut </span>sregs = kvm_sys::kvm_sregs::default(); + ioctl( + <span class="kw-2">&</span><span class="self">self</span>.vcpu, + kvm_sys::KVM_GET_SREGS, + <span class="kw-2">&mut </span>sregs <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ as </span>u64, )<span class="question-mark">?</span>; - <span class="prelude-val">Ok</span>(<span class="ident">sregs</span>) + <span class="prelude-val">Ok</span>(sregs) } - <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::kvm_sregs</span>) -> <span class="ident">io::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::KVM_SET_SREGS</span>, - <span class="kw-2">&</span><span class="ident">sregs</span> <span class="kw">as</span> <span class="kw-2">*const</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>, + <span class="doccomment">/// Set the special registers with the [`KVM_SET_SREGS`][kvm-set-sregs] ioctl in form of + /// [`kvm_sregs`](crate::kvm_sys::kvm_sregs). + /// + /// [kvm-set-sregs]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-sregs + </span><span class="kw">pub fn </span>set_sregs(<span class="kw-2">&</span><span class="self">self</span>, sregs: kvm_sys::kvm_sregs) -> io::Result<()> { + ioctl( + <span class="kw-2">&</span><span class="self">self</span>.vcpu, + kvm_sys::KVM_SET_SREGS, + <span class="kw-2">&</span>sregs <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>u64, ) - .<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) + .map(|<span class="kw">_</span>| ()) } - <span class="doccomment">/// Get the debug registers with the [`KVM_GET_DEBUGREGS`][kvm-get-debugregs] ioctl in form of</span> - <span class="doccomment">/// [`kvm_debugregs`](crate::kvm_sys::kvm_debugregs).</span> - <span class="doccomment">///</span> - <span class="doccomment">/// [kvm-get-debugregs]:</span> - <span class="doccomment">/// https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-debugregs</span> - <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>)]</span> - <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_debugregs</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">io::Result</span><span class="op"><</span><span class="ident">kvm_sys::kvm_debugregs</span><span class="op">></span> { - <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dregs</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_debugregs::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::KVM_GET_DEBUGREGS</span>, - <span class="kw-2">&mut</span> <span class="ident">dregs</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>, + <span class="doccomment">/// Get the debug registers with the [`KVM_GET_DEBUGREGS`][kvm-get-debugregs] ioctl in form of + /// [`kvm_debugregs`](crate::kvm_sys::kvm_debugregs). + /// + /// [kvm-get-debugregs]: + /// https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-get-debugregs + </span><span class="attr">#[cfg(target_arch = <span class="string">"x86_64"</span>)] + </span><span class="kw">pub fn </span>get_debugregs(<span class="kw-2">&</span><span class="self">self</span>) -> io::Result<kvm_sys::kvm_debugregs> { + <span class="kw">let </span><span class="kw-2">mut </span>dregs = kvm_sys::kvm_debugregs::default(); + ioctl( + <span class="kw-2">&</span><span class="self">self</span>.vcpu, + kvm_sys::KVM_GET_DEBUGREGS, + <span class="kw-2">&mut </span>dregs <span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ as </span>u64, )<span class="question-mark">?</span>; - <span class="prelude-val">Ok</span>(<span class="ident">dregs</span>) + <span class="prelude-val">Ok</span>(dregs) } - <span class="doccomment">/// Set the debug registers with the [`KVM_SET_DEBUGREGS`][kvm-set-debugregs] ioctl in form of</span> - <span class="doccomment">/// [`kvm_debugregs`](crate::kvm_sys::kvm_debugregs).</span> - <span class="doccomment">///</span> - <span class="doccomment">/// [kvm-set-debugregs]:</span> - <span class="doccomment">/// https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-debugregs</span> - <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>)]</span> - <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_debugregs</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">dregs</span>: <span class="ident">kvm_sys::kvm_debugregs</span>) -> <span class="ident">io::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::KVM_SET_DEBUGREGS</span>, - <span class="kw-2">&</span><span class="ident">dregs</span> <span class="kw">as</span> <span class="kw-2">*const</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>, + <span class="doccomment">/// Set the debug registers with the [`KVM_SET_DEBUGREGS`][kvm-set-debugregs] ioctl in form of + /// [`kvm_debugregs`](crate::kvm_sys::kvm_debugregs). + /// + /// [kvm-set-debugregs]: + /// https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-debugregs + </span><span class="attr">#[cfg(target_arch = <span class="string">"x86_64"</span>)] + </span><span class="kw">pub fn </span>set_debugregs(<span class="kw-2">&</span><span class="self">self</span>, dregs: kvm_sys::kvm_debugregs) -> io::Result<()> { + ioctl( + <span class="kw-2">&</span><span class="self">self</span>.vcpu, + kvm_sys::KVM_SET_DEBUGREGS, + <span class="kw-2">&</span>dregs <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>u64, ) - .<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) + .map(|<span class="kw">_</span>| ()) } - <span class="doccomment">/// Enable or disable guest single steppig (debug) with the</span> - <span class="doccomment">/// [`KVM_GUESTDBG_ENABLE`][kvm-guest-debug] ioctl.</span> - <span class="doccomment">///</span> - <span class="doccomment">/// [kvm-guest-debug]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-guest-debug</span> - <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>)]</span> - <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_single_step</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">enable</span>: <span class="ident">bool</span>) -> <span class="ident">io::Result</span><span class="op"><</span>()<span class="op">></span> { - <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dbg</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_guest_debug::default</span>(); + <span class="doccomment">/// Enable or disable guest single steppig (debug) with the + /// [`KVM_GUESTDBG_ENABLE`][kvm-guest-debug] ioctl. + /// + /// [kvm-guest-debug]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-guest-debug + </span><span class="attr">#[cfg(target_arch = <span class="string">"x86_64"</span>)] + </span><span class="kw">pub fn </span>set_single_step(<span class="kw-2">&</span><span class="self">self</span>, enable: bool) -> io::Result<()> { + <span class="kw">let </span><span class="kw-2">mut </span>dbg = kvm_sys::kvm_guest_debug::default(); - <span class="kw">if</span> <span class="ident">enable</span> { - <span class="comment">// Enable guest debugging and single stepping.</span> - <span class="ident">dbg</span>.<span class="ident">control</span> <span class="op">=</span> <span class="ident">kvm_sys::KVM_GUESTDBG_ENABLE</span> <span class="op">|</span> <span class="ident">kvm_sys::KVM_GUESTDBG_SINGLESTEP</span>; + <span class="kw">if </span>enable { + <span class="comment">// Enable guest debugging and single stepping. + </span>dbg.control = kvm_sys::KVM_GUESTDBG_ENABLE | kvm_sys::KVM_GUESTDBG_SINGLESTEP; } - <span class="comment">// Initialize debug registers based on current VCPUs debug register values.</span> - <span class="kw">let</span> <span class="ident">dregs</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">get_debugregs</span>()<span class="question-mark">?</span>; - <span class="ident">dbg</span>.<span class="ident">arch</span>.<span class="ident">debugreg</span>[<span class="number">0</span>..<span class="number">4</span>].<span class="ident">copy_from_slice</span>(<span class="kw-2">&</span><span class="ident">dregs</span>.<span class="ident">db</span>); - <span class="comment">// DR4-DR5 are reserved.</span> - <span class="ident">dbg</span>.<span class="ident">arch</span>.<span class="ident">debugreg</span>[<span class="number">6</span>] <span class="op">=</span> <span class="ident">dregs</span>.<span class="ident">dr6</span>; - <span class="ident">dbg</span>.<span class="ident">arch</span>.<span class="ident">debugreg</span>[<span class="number">7</span>] <span class="op">=</span> <span class="ident">dregs</span>.<span class="ident">dr7</span>; + <span class="comment">// Initialize debug registers based on current VCPUs debug register values. + </span><span class="kw">let </span>dregs = <span class="self">self</span>.get_debugregs()<span class="question-mark">?</span>; + dbg.arch.debugreg[<span class="number">0</span>..<span class="number">4</span>].copy_from_slice(<span class="kw-2">&</span>dregs.db); + <span class="comment">// DR4-DR5 are reserved. + </span>dbg.arch.debugreg[<span class="number">6</span>] = dregs.dr6; + dbg.arch.debugreg[<span class="number">7</span>] = dregs.dr7; - <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::KVM_SET_GUEST_DEBUG</span>, - <span class="kw-2">&</span><span class="ident">dbg</span> <span class="kw">as</span> <span class="kw-2">*const</span> <span class="kw">_</span> <span class="kw">as</span> <span class="ident">u64</span>, + ioctl( + <span class="kw-2">&</span><span class="self">self</span>.vcpu, + kvm_sys::KVM_SET_GUEST_DEBUG, + <span class="kw-2">&</span>dbg <span class="kw">as </span><span class="kw-2">*const </span><span class="kw">_ as </span>u64, ) - .<span class="ident">map</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> ()) + .map(|<span class="kw">_</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">&mut</span> <span class="self">self</span>) -> <span class="ident">io::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::KVM_RUN</span>, <span class="number">0</span>)<span class="question-mark">?</span>; + <span class="doccomment">/// Run the guest VCPU with the [`KVM_RUN`][kvm-run] ioctl until it exits with one of the exit + /// reasons described in [`KvmExit`](crate::vcpu::KvmExit). + /// + /// [kvm-run]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-run + </span><span class="kw">pub fn </span>run(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<KvmExit<<span class="lifetime">'_</span>>> { + ioctl(<span class="kw-2">&</span><span class="self">self</span>.vcpu, kvm_sys::KVM_RUN, <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">let </span>kvm_run = <span class="self">self</span>.kvm_run.as_mut(); - <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="prelude-val">Ok</span>(<span class="ident">KvmExit::Halt</span>), - <span class="ident">kvm_sys::KVM_EXIT_IO</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">match </span>kvm_run.exit_reason <span class="kw">as </span>u64 { + kvm_sys::KVM_EXIT_HLT => <span class="prelude-val">Ok</span>(KvmExit::Halt), + kvm_sys::KVM_EXIT_IO => { + <span class="comment">// Safe to use union `io` field, as Kernel instructed us to. + </span><span class="kw">let </span>io = <span class="kw">unsafe </span>{ kvm_run.inner.io }; - <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">*mut</span> <span class="ident">kvm_sys::kvm_run</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="ident">u8</span>; + <span class="kw">let </span>kvm_run_ptr = kvm_run <span class="kw">as </span><span class="kw-2">*mut </span>kvm_sys::kvm_run <span class="kw">as </span><span class="kw-2">*mut </span>u8; - <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="comment">// Create IO buffer located at `kvm_run + io.offset`. + </span><span class="kw">let </span>data = <span class="kw">unsafe </span>{ + std::slice::from_raw_parts_mut( + kvm_run_ptr.offset(io.data_offset <span class="kw">as </span>isize), + io.count <span class="comment">/* num blocks */ </span><span class="kw">as </span>usize * io.size <span class="comment">/* bytes per block */ </span><span class="kw">as </span>usize, ) }; - <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="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="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="macro">unreachable!</span>(), + <span class="kw">match </span>io.direction <span class="kw">as </span>u64 { + kvm_sys::KVM_EXIT_IO_IN => <span class="prelude-val">Ok</span>(KvmExit::IoIn(io.port, data)), + kvm_sys::KVM_EXIT_IO_OUT => <span class="prelude-val">Ok</span>(KvmExit::IoOut(io.port, data)), + <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(), } } - <span class="ident">kvm_sys::KVM_EXIT_MMIO</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">&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>; + kvm_sys::KVM_EXIT_MMIO => { + <span class="comment">// Safe to use union `mmio` filed, as Kernel instructed us to. + </span><span class="kw">let </span>mmio = <span class="kw">unsafe </span>{ <span class="kw-2">&mut </span>kvm_run.inner.mmio }; + <span class="kw">let </span>len = mmio.len <span class="kw">as </span>usize; - <span class="kw">match</span> <span class="ident">mmio</span>.<span class="ident">is_write</span> { - <span class="number">0</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">&mut</span> <span class="ident">mmio</span>.<span class="ident">data</span>[..<span class="ident">len</span>])), - <span class="number">1</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">&</span><span class="ident">mmio</span>.<span class="ident">data</span>[..<span class="ident">len</span>])), - <span class="kw">_</span> => <span class="macro">unreachable!</span>(), + <span class="kw">match </span>mmio.is_write { + <span class="number">0 </span>=> <span class="prelude-val">Ok</span>(KvmExit::MmioRead(mmio.phys_addr, <span class="kw-2">&mut </span>mmio.data[..len])), + <span class="number">1 </span>=> <span class="prelude-val">Ok</span>(KvmExit::MmioWrite(mmio.phys_addr, <span class="kw-2">&</span>mmio.data[..len])), + <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(), } } - <span class="ident">kvm_sys::KVM_EXIT_DEBUG</span> => { - <span class="comment">// Safe to use union `debug` field, as Kernel instructed us to.</span> - <span class="kw">let</span> <span class="ident">debug</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">kvm_run</span>.<span class="ident">inner</span>.<span class="ident">debug</span> }; + kvm_sys::KVM_EXIT_DEBUG => { + <span class="comment">// Safe to use union `debug` field, as Kernel instructed us to. + </span><span class="kw">let </span>debug = <span class="kw">unsafe </span>{ kvm_run.inner.debug }; - <span class="prelude-val">Ok</span>(<span class="ident">KvmExit::Debug</span>(<span class="ident">debug</span>.<span class="ident">pc</span>)) + <span class="prelude-val">Ok</span>(KvmExit::Debug(debug.pc)) } - <span class="ident">r</span> @ <span class="kw">_</span> => { - <span class="macro">todo!</span>(<span class="string">"KVM_EXIT_... (exit_reason={}) not implemented!"</span>, <span class="ident">r</span>) + r @ <span class="kw">_ </span>=> { + <span class="macro">todo!</span>(<span class="string">"KVM_EXIT_... (exit_reason={}) not implemented!"</span>, r) } } } } -</code></pre></div> -</section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="kvm_rs" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.63.0 (4b91a6ea7 2022-08-08)" ></div> -</body></html>
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