Please re-enable nvapi (dxvk-nvapi) on aarch64 builds for NVIDIA DGX Spark features

protonopen Feature Request

ValveSoftware/Proton#9439 · opened 2026-01-27 by scaronni · updated 2026-02-01 · 3 comments · github

Sscaronni 2026-01-27 github

Please revert commit https://github.com/ValveSoftware/Proton/commit/2ee837ee5ba88957210de0120f0741324d57823e that disables building nvapi (through dxvk-nvapi) on aarch64.

This prevents these features in a setup like the NVIDIA Spark systems (aarch64 + FEX + Proton):

NVIDIA Smooth Motion
NVIDIA Reflex via the additional layer
NVIDIA DLSS (Frame Generation / Super Resolution)

The hardware is now sold by many vendors:

Thanks!

Iivyl 2026-01-27 github

It was originally disabled because it did not build with clang for ARM64. This may have changed since.

Have you tried to build it? Did it work at all? Does any of those features work?

SSaancreed 2026-01-28 github

I was able to successfully build nvapi.dll using llvm-mingw toolchain from @bylaws with both arm64ec-w64-mingw32-g++ and arm64ec-w64-mingw32-clang++ compilers, with a cross file like so in the latter case:

[binaries]
ar = 'arm64ec-w64-mingw32-ar'
c = 'arm64ec-w64-mingw32-clang'
cpp = 'arm64ec-w64-mingw32-clang++'
ld = 'arm64ec-w64-mingw32-ld'
widl = 'arm64ec-w64-mingw32-widl'
windres = 'arm64ec-w64-mingw32-windres'
strip = 'llvm-strip'

[host_machine]
system = 'windows'
cpu_family = 'aarch64'
cpu = 'aarch64'
endian = 'little'

But unfortunately, I don't have proper hardware to test this.

Rrishibaghel25 2026-02-01 github

What's required spec ?? I can test :)

DLLs

nvapi.dllx1 2026-01