Lorelei Project

User-level Dynamic binary translators (DBTs) cannot efficiently emulate libraries involving vector instructions and hardware drivers, such as OpenGL, Vulkan, and several high-performance computing libraries, thus facing performance challenges.

Lorelei is a heterogeneous execution compatibility layer for DBTs, focusing on adding host libraries pass-through support to existing DBTs. Lorelei is not a emulator but an extension or plugin for DBTs.

Lorelei can enable traditional full-emulation DBTs such as QEMU (User) and Blink to directly invoke host shared libraries, and also provide native-passthrough support of more libraries for Box64.

Currently, the Lorelei-patched QEMU and Blink are also capable of running x86_64 games on ARM64 and RISC-V64 Linux systems.

Supported Libraries

• FFmpeg (avcodec, avformat, avutil, avfilter, avdevice, swscale, swresample)
• SDL (SDL1, SDL2)
• OpenGL (GL, EGL, GLX)
• Vulkan
• OpenSSL (crypto, ssl)
• Vorbis (vorbis, vorbisenc, vorbisfile)
• Zlib
• Zstd
• FFTW3
• Pixman

To be added...

Compatible Games

The following x86_64 games are tested on Lorelei-patched qemu-x86_64.

• Hollow Knight
• SuperTux
• SuperTuxKart
• OpenArena
• Red Eclipse
• Xonotic
• World of Padman
• Uebergame
• Assault Cube

KVM Forum 2025

Lorelei: Enable QEMU to leverage native shared libraries