Steam Deck

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Valve is working on a version of proton for ARM devices (x.com)

submitted 2 months ago* (last edited 2 months ago) by [email protected] to c/[email protected]

82 comments fedilink hide all child comments

This would presumably let x86 windows games run on ARM hardware.

This is almost certainly meant for the next Valve VR headset, but ARM has so much better power efficiency than x86 that a future ARM based Deck would be a huge improvement to battery life.

Also see this tweet:

VR games that have already secretly pushed Android ARM builds onto the Steam Store are ran via Waydroid (androidARM to LinuxARM)

VR games that do not have an ARM build on Steam (windows x86) are being translated/emulated via ProtonARM and FEX

Edit: here's gamingonlinux coverage of this info, includes some more information

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[–] [email protected] 11 points 2 months ago (1 children)

Also, does ARM still have better battery life when all of the machine code has to be translated from x86? That adds a not insubstantial amount of CPU overhead, which does hurt battery life.

No idea, and that's a pretty good question. The again some games run better on proton through Linux than they do on windows, so the performance overhead isn't that bad.

[–] [email protected] 6 points 2 months ago (1 children)

True, but I feel like having to reroute x86 calls to ARM will produce more overhead than just Proton.

[–] [email protected] 4 points 2 months ago

Depends on how it's implemented. If they have a version of Proton that translates all x86 windows syscalls to ARM Linux, some operations could be extremely efficient.

There's definitely got to be more overhead overall, though. Especially for devices with memory page sizes other than 4K, like the M-series Apple chips do (they use 16K as their page size), likely a VM will need to be sandwiched in there to ensure memory alignment. It'll more fully be emulation and not just translation.