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VM 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/vm.rs`."><title>vm.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" type="font/woff2" 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VM 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 class="kw">use</span> <span class="ident">std::os::unix::io::FromRawFd</span>; +</span><span class="kw">use </span>std::fs; +<span class="kw">use </span>std::io; +<span class="kw">use </span>std::os::unix::io::FromRawFd; -<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::vcpu::Vcpu</span>; -<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">ioctl</span>, <span class="ident">kvm_sys</span>, <span class="ident">KvmRun</span>, <span class="ident">PhysAddr</span>, <span class="ident">UserMem</span>}; +<span class="kw">use </span><span class="kw">crate</span>::vcpu::Vcpu; +<span class="kw">use crate</span>::{ioctl, kvm_sys, KvmRun, PhysAddr, UserMem}; -<span class="doccomment">/// Wrapper for VM ioctls.</span> -<span class="doccomment">///</span> -<span class="doccomment">/// Representation of the file descriptor obtained by the [`KVM_CREATE_VM`][kvm-create-vm] ioctl.</span> -<span class="doccomment">/// This wrapper provides access to the `VM ioctls` as described in [KVM API][kvm].</span> -<span class="doccomment">///</span> -<span class="doccomment">/// [kvm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#general-description</span> -<span class="doccomment">/// [kvm-create-vm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vm</span> -<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Vm</span> { - <span class="ident">vm</span>: <span class="ident">fs::File</span>, - <span class="ident">vcpu_mmap_size</span>: <span class="ident">usize</span>, +<span class="doccomment">/// Wrapper for VM ioctls. +/// +/// Representation of the file descriptor obtained by the [`KVM_CREATE_VM`][kvm-create-vm] ioctl. +/// This wrapper provides access to the `VM ioctls` as described in [KVM API][kvm]. +/// +/// [kvm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#general-description +/// [kvm-create-vm]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vm +</span><span class="kw">pub struct </span>Vm { + vm: fs::File, + vcpu_mmap_size: usize, } -<span class="kw">impl</span> <span class="ident">Vm</span> { - <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">vm</span>: <span class="ident">fs::File</span>, <span class="ident">vcpu_mmap_size</span>: <span class="ident">usize</span>) -> <span class="ident">Vm</span> { - <span class="ident">Vm</span> { <span class="ident">vm</span>, <span class="ident">vcpu_mmap_size</span> } +<span class="kw">impl </span>Vm { + <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(vm: fs::File, vcpu_mmap_size: usize) -> Vm { + Vm { vm, vcpu_mmap_size } } - <span class="doccomment">/// Map memory from userspace into the VM as `guest physical` memory starting at address</span> - <span class="doccomment">/// `phys_addr`.</span> - <span class="doccomment">/// The underlying operation is the [`KVM_SET_USER_MEMORY_REGION`][kvm-set-user-memory-region]</span> - <span class="doccomment">/// ioctl.</span> - <span class="doccomment">///</span> - <span class="doccomment">/// # Safety</span> - <span class="doccomment">///</span> - <span class="doccomment">/// The `mem: &UserMem` argument passed to this function must at least live as long the `Vcpu`</span> - <span class="doccomment">/// instance.</span> - <span class="doccomment">///</span> - <span class="doccomment">/// [kvm-set-user-memory-region]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-user-memory-region</span> - <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">set_user_memory_region</span>( + <span class="doccomment">/// Map memory from userspace into the VM as `guest physical` memory starting at address + /// `phys_addr`. + /// The underlying operation is the [`KVM_SET_USER_MEMORY_REGION`][kvm-set-user-memory-region] + /// ioctl. + /// + /// # Safety + /// + /// The `mem: &UserMem` argument passed to this function must at least live as long the `Vcpu` + /// instance. + /// + /// [kvm-set-user-memory-region]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-set-user-memory-region + </span><span class="kw">pub unsafe fn </span>set_user_memory_region( <span class="kw-2">&</span><span class="self">self</span>, - <span class="ident">phys_addr</span>: <span class="ident">PhysAddr</span>, - <span class="ident">mem</span>: <span class="kw-2">&</span><span class="ident">UserMem</span>, - ) -> <span class="ident">io::Result</span><span class="op"><</span>()<span class="op">></span> { - <span class="comment">// Create guest physical memory mapping for `slot : 0` at guest `phys_addr`.</span> - <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">kvm_mem</span> <span class="op">=</span> <span class="ident">kvm_sys::kvm_userspace_memory_region::default</span>(); - <span class="ident">kvm_mem</span>.<span class="ident">userspace_addr</span> <span class="op">=</span> <span class="ident">mem</span>.<span class="ident">ptr</span> <span class="kw">as</span> <span class="ident">u64</span>; - <span class="ident">kvm_mem</span>.<span class="ident">memory_size</span> <span class="op">=</span> <span class="ident">mem</span>.<span class="ident">len</span> <span class="kw">as</span> <span class="ident">u64</span>; - <span class="ident">kvm_mem</span>.<span class="ident">guest_phys_addr</span> <span class="op">=</span> <span class="ident">phys_addr</span>.<span class="number">0</span>; + phys_addr: PhysAddr, + mem: <span class="kw-2">&</span>UserMem, + ) -> io::Result<()> { + <span class="comment">// Create guest physical memory mapping for `slot : 0` at guest `phys_addr`. + </span><span class="kw">let </span><span class="kw-2">mut </span>kvm_mem = kvm_sys::kvm_userspace_memory_region::default(); + kvm_mem.userspace_addr = mem.ptr <span class="kw">as </span>u64; + kvm_mem.memory_size = mem.len <span class="kw">as </span>u64; + kvm_mem.guest_phys_addr = phys_addr.<span class="number">0</span>; - <span class="ident">ioctl</span>( - <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vm</span>, - <span class="ident">kvm_sys::KVM_SET_USER_MEMORY_REGION</span>, - <span class="kw-2">&</span><span class="ident">kvm_mem</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>.vm, + kvm_sys::KVM_SET_USER_MEMORY_REGION, + <span class="kw-2">&</span>kvm_mem <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">/// Create a new virtual cpu with the [`KVM_CREATE_VCPU`][kvm-create-vcpu] ioctl.</span> - <span class="doccomment">/// Returns a wrapper [`vcpu::Vcpu`][crate::vcpu::Vcpu] representing the VCPU.</span> - <span class="doccomment">///</span> - <span class="doccomment">/// [kvm-create-vcpu]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vcpu</span> - <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">create_vpcu</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">id</span>: <span class="ident">u64</span>) -> <span class="ident">io::Result</span><span class="op"><</span><span class="ident">Vcpu</span><span class="op">></span> { - <span class="kw">let</span> <span class="ident">vcpu</span> <span class="op">=</span> <span class="ident">ioctl</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">vm</span>, <span class="ident">kvm_sys::KVM_CREATE_VCPU</span>, <span class="ident">id</span>) - .<span class="ident">map</span>(<span class="op">|</span><span class="ident">fd</span><span class="op">|</span> <span class="kw">unsafe</span> { <span class="ident">fs::File::from_raw_fd</span>(<span class="ident">fd</span>) })<span class="question-mark">?</span>; + <span class="doccomment">/// Create a new virtual cpu with the [`KVM_CREATE_VCPU`][kvm-create-vcpu] ioctl. + /// Returns a wrapper [`vcpu::Vcpu`][crate::vcpu::Vcpu] representing the VCPU. + /// + /// [kvm-create-vcpu]: https://www.kernel.org/doc/html/latest/virt/kvm/api.html#kvm-create-vcpu + </span><span class="kw">pub fn </span>create_vpcu(<span class="kw-2">&</span><span class="self">self</span>, id: u64) -> io::Result<Vcpu> { + <span class="kw">let </span>vcpu = ioctl(<span class="kw-2">&</span><span class="self">self</span>.vm, kvm_sys::KVM_CREATE_VCPU, id) + .map(|fd| <span class="kw">unsafe </span>{ fs::File::from_raw_fd(fd) })<span class="question-mark">?</span>; - <span class="kw">let</span> <span class="ident">kvm_run</span> <span class="op">=</span> <span class="ident">KvmRun::new</span>(<span class="kw-2">&</span><span class="ident">vcpu</span>, <span class="self">self</span>.<span class="ident">vcpu_mmap_size</span>)<span class="question-mark">?</span>; + <span class="kw">let </span>kvm_run = KvmRun::new(<span class="kw-2">&</span>vcpu, <span class="self">self</span>.vcpu_mmap_size)<span class="question-mark">?</span>; - <span class="prelude-val">Ok</span>(<span class="ident">Vcpu::new</span>(<span class="ident">vcpu</span>, <span class="ident">kvm_run</span>)) + <span class="prelude-val">Ok</span>(Vcpu::new(vcpu, kvm_run)) } } -</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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