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Dev.to
6/28/2026
The original title is "Building a KVM Virtual Machine in Rust: Running a binary"

The original title is "Building a KVM Virtual Machine in Rust: Running a binary"

Original: Building a KVM Virtual Machine in Rust: Running a binary

Short summary

Part 3 of a KVM-in-Rust tutorial covering binary loading into memory, vCPU creation via ioctl calls, and x86-64 register initialization. Demonstrates how to replicate QEMU's register setup (sregs2/regs) with code examples and strace analysis before KVM_RUN.

  • Load binary into KVM memory at arbitrary addresses using unsafe Rust pointer operations
  • Create vCPUs by calling KVM_CREATE_VCPU ioctl and analyzing register setup sequences from QEMU strace
  • Initialize CPU registers (sregs2/regs) to match QEMU defaults before executing KVM_RUN

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