Kernel Organization
sgl-project/sglang
Apply the SGLang kernels RFC when adding, moving, splitting, or reviewing kernel APIs, registry metadata, kernel tests, benchmarks, and model-specific implementations.
QEMU/KVM skill for virtualization and kernel development. An agent skill from mohitmishra786/low-level-dev-skills.
MITAuto-check: notes
Install Qemu Kvm
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills qemu-kvm --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/virtualization/qemu-kvm .claude/skills/qemu-kvm && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "qemu-kvm" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvm into .claude/skills/qemu-kvm/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "qemu-kvm", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvmType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills qemu-kvm --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/virtualization/qemu-kvm .agents/skills/qemu-kvm && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "qemu-kvm" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvm into .agents/skills/qemu-kvm/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "qemu-kvm", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills qemu-kvm --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/virtualization/qemu-kvm .cursor/skills/qemu-kvm && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "qemu-kvm" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvm into .cursor/skills/qemu-kvm/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "qemu-kvm", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mohitmishra786/low-level-dev-skills.git --path skills/virtualization/qemu-kvm--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills qemu-kvm --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/virtualization/qemu-kvm .gemini/skills/qemu-kvm && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "qemu-kvm" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvm into .gemini/skills/qemu-kvm/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "qemu-kvm", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mohitmishra786/low-level-dev-skills qemu-kvmInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/virtualization/qemu-kvm .github/skills/qemu-kvm && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "qemu-kvm" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvm into .github/skills/qemu-kvm/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "qemu-kvm", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mohitmishra786/low-level-dev-skills qemu-kvm --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mohitmishra786/low-level-dev-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/virtualization/qemu-kvm .opencode/skills/qemu-kvm && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "qemu-kvm" agent skill from https://github.com/mohitmishra786/low-level-dev-skills/tree/main/skills/virtualization/qemu-kvm into .opencode/skills/qemu-kvm/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "qemu-kvm", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
qemu-kvm- GitHub stars
- 252
- Token cost
- ~1.3k tokens
- SKILL.md length
- 264 words
- Files
- 1
- Skills in repo
- 138
- Repo updated
- First seen
- Licence
- MIT
At a glance
QEMU/KVM skill for virtualization and kernel development. An agent skill from mohitmishra786/low-level-dev-skills.
- Works in 8 steps: Basic KVM VM → virtio devices → VFIO device passthrough → …
- Running qemu-system-x8664 with KVM
- SKILL.md covers Purpose, When to Use, Workflow and Common Problems, plus 1 more section
- Reaches archive.ubuntu.com
What it does
Qemu Kvm is an agent skill from mohitmishra786/low-level-dev-skills. QEMU/KVM skill for virtualization and kernel development. Use when running qemu-system-x8664 with KVM, configuring virtio devices, VFIO passthrough, QMP monitor, libvirt, or booting custom kernels. Activates on queries about QEMU, KVM, virtio, VFIO, virsh, virt-install, or -kernel -append.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: A curated suite of AI agent skills for systems and low-level programming with C/C++, Rust, and Zig toolchains, covering compilers, debuggers, profilers, build systems…. The licence is MIT.
When your agent uses it
- Running qemu-system-x8664 with KVM
- Configuring virtio devices
- VFIO passthrough
- Booting custom kernels
Example prompts
- “/qemu-kvm”
Workflow steps
8 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit bdc5847. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
archive.ubuntu.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Qemu Kvm loads about 1.3k tokens when it runs. Until then it costs about 75 tokens; SKILL.md has 264 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteRuns commands with sudoSKILL.md:77
echo 10de 1c03 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id - NoteRuns commands with sudoSKILL.md:78
sudo virsh nodedev-detach pci_0000_01_00_0
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from mohitmishra786/low-level-dev-skills at commit bdc5847, republished under its MIT licence (© mohitmishra786). 264 words, ~1,324 tokens.
Download SKILL.mdSave it as
.claude/skills/qemu-kvm/SKILL.md (or your agent's skills folder).- name
- qemu-kvm
- description
- QEMU/KVM skill for virtualization and kernel development. Use when running qemu-system-x86_64 with KVM, configuring virtio devices, VFIO passthrough, QMP monitor, libvirt, or booting custom kernels. Activates on queries about QEMU, KVM, virtio, VFIO, virsh, virt-install, or -kernel -append.
QEMU / KVM
Purpose
Guide agents through QEMU system emulation and KVM acceleration: key qemu-system-x86_64 flags, virtio devices, VFIO device passthrough, QMP monitor protocol, libvirt/virsh management, and QEMU for kernel development with -kernel -initrd -append.
When to Use
- Running Linux VMs with hardware acceleration
- Testing custom kernels without bare metal
- Passing through GPU or NIC to a VM with VFIO
- Managing VMs with libvirt and virsh
- Creating VM snapshots for reproducible testing
- Developing kernel or bootloader with direct kernel boot
Workflow
1. Basic KVM VM
# Check KVM support
egrep -c '(vmx|svm)' /proc/cpuinfo
ls -l /dev/kvm
# Minimal Ubuntu VM
qemu-system-x86_64 \
-enable-kvm \
-cpu host \
-m 4096 \
-smp 4 \
-drive file=ubuntu.img,format=qcow2 \
-netdev user,id=net0 \
-device virtio-net-pci,netdev=net0 \
-display none \
-serial mon:stdio| Flag | Purpose |
|---|---|
-enable-kvm | Use KVM acceleration |
-cpu host | Pass through host CPU features |
-m | RAM in MB |
-smp | vCPU count |
-drive | Disk image |
-netdev / -device | Network backend |
2. virtio devices
# virtio-blk (paravirtual disk — faster)
-device virtio-blk-pci,drive=hd0 \
-drive if=none,id=hd0,file=disk.qcow2,format=qcow2
# virtio-net
-netdev tap,id=net0,ifname=tap0,script=no,downscript=no \
-device virtio-net-pci,netdev=net0
# virtio-balloon (dynamic memory)
-device virtio-balloon-pci
# virtio-scsi
-device virtio-scsi-pci,id=scsi0 \
-device scsi-hd,drive=hd0,bus=scsi0.0Always prefer virtio over emulated devices for performance.
3. VFIO device passthrough
# Bind device to vfio-pci
echo 10de 1c03 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id
sudo virsh nodedev-detach pci_0000_01_00_0
# QEMU with passthrough
qemu-system-x86_64 \
-enable-kvm -m 8192 -smp 8 \
-device vfio-pci,host=01:00.0 \
...Requires IOMMU enabled (intel_iommu=on or amd_iommu=on in kernel cmdline).
4. QMP monitor
# Start with QMP socket
qemu-system-x86_64 ... \
-qmp unix:/tmp/qmp.sock,server,nowait
# Send QMP commands
socat - UNIX-CONNECT:/tmp/qmp.sock
{"execute":"qmp_capabilities"}
{"execute":"query-status"}
{"execute":"system_powerdown"}
{"execute":"savevm", "arguments":{"name":"checkpoint1"}}5. libvirt and virsh
# Define VM from XML
virsh define myvm.xml
# Start/stop
virsh start myvm
virsh shutdown myvm
virsh destroy myvm # force power off
# Console
virsh console myvm
# Snapshot
virsh snapshot-create-as myvm snap1 "before upgrade"
# List
virsh list --all# Create VM interactively
virt-install \
--name ubuntu-vm \
--ram 4096 \
--vcpus 4 \
--disk path=/var/lib/libvirt/images/ubuntu.qcow2,size=20 \
--os-variant ubuntu22.04 \
--network bridge=virbr0 \
--graphics none \
--console pty,target_type=serial \
--location http://archive.ubuntu.com/ubuntu/dists/jammy/main/installer-amd64/ \
--extra-args 'console=ttyS0,115200n8'6. Kernel development boot
# Direct kernel boot (no disk install needed)
qemu-system-x86_64 \
-enable-kvm \
-m 512 \
-kernel arch/x86/boot/bzImage \
-initrd /path/to/initramfs.cpio.gz \
-append "console=ttyS0 root=/dev/sda rw nokaslr" \
-serial stdio \
-display none \
-no-reboot# With custom rootfs on virtio disk
-drive file=rootfs.ext4,format=raw,if=virtio \
-append "console=ttyS0 root=/dev/vda rw"7. Debugging kernel in QEMU
# GDB stub for kernel
qemu-system-x86_64 \
-kernel bzImage -append "console=ttyS0 nokaslr" \
-s -S \ # -s = gdb port 1234, -S = wait for gdb
-serial stdio -display none
# Host GDB
gdb vmlinux
(gdb) target remote :1234
(gdb) break start_kernel
(gdb) continue8. qcow2 disk management
qemu-img create -f qcow2 disk.qcow2 20G
qemu-img snapshot -c clean disk.qcow2
qemu-img convert -O raw disk.qcow2 disk.raw
qemu-img info disk.qcow2Common Problems
| Symptom | Cause | Fix |
|---|---|---|
| KVM disabled warning | BIOS VT-x off or nested issue | Enable VT-x/AMD-V; check /dev/kvm |
| VM very slow | KVM not active | Add -enable-kvm; install kvm modules |
| VFIO group error | Device not in IOMMU group | Use find /sys/kernel/iommu_groups/ |
| No network in VM | Wrong netdev backend | user networking vs tap/bridge |
| Kernel panic on boot | Wrong root= or missing driver | Add virtio drivers to initrd |
| QMP connection refused | Socket not ready | Wait for QEMU start; check path |
Related Skills
skills/virtualization/hypervisor-internals— VT-x/SVM theory under KVMskills/kernel/kernel-testing— boot test kernels in QEMUskills/kernel/os-dev-scratch— minimal OS development in QEMUskills/kernel/kernel-debugging— kgdb with QEMU-s -Sskills/async-io/dpdk— DPDK with QEMU virtioskills/platform/riscv-privileged—qemu-system-riscv64
© mohitmishra786, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/virtualization/qemu-kvm of mohitmishra786/low-level-dev-skills.
Open the folder on GitHubat commit bdc5847
Compare with similar skills
Qemu Kvm next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Qemu Kvm this skillmohitmishra786/low-level-dev-skills | 252 | — | ~1.3k | Automated safety check: Notes | MIT | |
| Kernel Organizationsgl-project/sglang | 37k | — | ~1.3k | Automated safety check: Pass | Apache-2.0 | |
| Metal Kernelpytorch/pytorch | 104k | — | ~4.9k | Automated safety check: Pass | Custom licence | |
| Semantic Kernelgithub/awesome-copilot | 40k | 1 repos | ~756 | Automated safety check: Pass | MIT | |
| Add Sgl Kernelsgl-project/sglang | 37k | 2 repos | ~3.4k | Automated safety check: Pass | Apache-2.0 | |
| Add Jit Kernelsgl-project/sglang | 37k | — | ~13k | Automated safety check: Pass | Apache-2.0 |
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Questions about Qemu Kvm
What does Qemu Kvm do?
QEMU/KVM skill for virtualization and kernel development. An agent skill from mohitmishra786/low-level-dev-skills. Qemu Kvm is an agent skill from mohitmishra786/low-level-dev-skills. QEMU/KVM skill for virtualization and kernel development.
When should I use Qemu Kvm?
Qemu Kvm fits situations like: running qemu-system-x8664 with KVM; configuring virtio devices; VFIO passthrough; booting custom kernels.
How do I install Qemu Kvm in Claude Code?
Run `npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a claude-code`. Or copy the skill folder (skills/virtualization/qemu-kvm in mohitmishra786/low-level-dev-skills) into .claude/skills/qemu-kvm in your project. Claude Code loads it when a task matches its description.
How do I install Qemu Kvm in Codex?
Run `npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a codex`. Or copy the skill folder (skills/virtualization/qemu-kvm in mohitmishra786/low-level-dev-skills) into .agents/skills/qemu-kvm in your project. Codex loads it when a task matches its description.
Can I use Qemu Kvm in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitmishra786/low-level-dev-skills --skill qemu-kvm -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/qemu-kvm, .gemini/skills/qemu-kvm, .github/skills/qemu-kvm and .opencode/skills/qemu-kvm in your project.
What does Qemu Kvm need to run?
SKILL.md names no scripts, command-line tools or credentials: Qemu Kvm is instructions for the agent only.
Does Qemu Kvm access the network?
SKILL.md names 1 domain. In commands or code: archive.ubuntu.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Qemu Kvm safe to install?
Our automated static check of SKILL.md found notes only (runs commands with sudo), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Qemu Kvm use?
Qemu Kvm is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Qemu Kvm use?
About 1.3k tokens (SKILL.md is roughly 5.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Qemu Kvm?
Skills that share tags, products or a category with Qemu Kvm: Kernel Organization (sgl-project/sglang, 37k stars), Metal Kernel (pytorch/pytorch, 104k stars), Semantic Kernel (github/awesome-copilot, 40k stars) and Add Sgl Kernel (sgl-project/sglang, 37k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Qemu Kvm?
mohitmishra786 (a GitHub user) maintains it in mohitmishra786/low-level-dev-skills, which has 252 GitHub stars. The repository holds 138 skills in this directory. The repository was last updated on June 27, 2026.
Source: mohitmishra786/low-level-dev-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.