1992212 - Enable WebGPU by default for MacOS Tahoe on ARM architecture

Status: RESOLVED FIXED

(Core :: Graphics: WebGPU, task, P1)

Comment 1

[Andy Leiserson [:aleiserson]]

Attachment: Bug 1992212 - Enable WebGPU by default on MacOS aarch64 r=#webgpu-reviewers!

Comment 2

[Andy Leiserson [:aleiserson]]

The current patch enables WebGPU for any MacOS version as long as it is running on aarch64.

I still need to make an additional change to block it for versions before Tahoe.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/5c55cb99fed3
https://hg.mozilla.org/integration/autoland/rev/dba752234ac1
Enable WebGPU by default on MacOS aarch64 r=webidl,dom-worker-reviewers,webgpu-reviewers,smaug,ErichDonGubler,saschanaz,edenchuang

Comment 4

[Cristina Horotan [:chorotan]]

https://hg.mozilla.org/mozilla-central/rev/dba752234ac1

Comment 5

[Andy Leiserson [:aleiserson]]

Attachment: Bug 1992212 - Block WebGPU on pre-Tahoe MacOS r=#webgpu-reviewers,aosmond

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/5dc0d50b161c
https://hg.mozilla.org/integration/autoland/rev/db6c3e81921b
Block WebGPU on pre-Tahoe MacOS r=webgpu-reviewers,taskgraph-reviewers,jmaher,ErichDonGubler

Comment 7

[amarc]

https://hg.mozilla.org/mozilla-central/rev/db6c3e81921b

Comment 8

[Andy Leiserson [:aleiserson]]

Summarizing what was done here and the factors governing WebGPU enablement on MacOS:

• Starting in Firefox 145, the default for the dom.webgpu.enabled preference in StaticPrefList was changed from false to true when defined(XP_MACOSX) && defined(MOZ_AARCH64) (i.e. MacOS running on Apple Silicon).
• In Firefox 145 and 146, the graphics feature blocklist blocks WebGPU with FEATURE_FAILURE_WEBGPU_MACOS_26_REQUIRED if MacOS is not Tahoe or newer.

Both of these changes only affect late beta or release builds. Nightly or early beta were already setting dom.webgpu.enabled to true, and the feature blocklist entry is conditioned by #ifndef EARLY_BETA_OR_EARLIER.

In Firefox 143.0.3 and 144, it is possible to enable WebGPU on any MacOS version by setting the dom.webgpu.enabled preference (see bug 1987533). In Firefox 145 and 146, it is necessary to set gfx.webgpu.ignore-blocklist to enable WebGPU on pre-Tahoe MacOS.

Bug 1993341 tracks removing the blocklist entry and enabling WebGPU on additional MacOS versions. From Firefox 147, WebGPU will be enabled by default on any ARM Mac, and can be enabled by setting dom.webgpu.enabled on Intel Macs.