[DragonFlyBSD - Submit #3264] (Resolved) [PATCH] Clarify XSAVE features, and always use XSAVE

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Wed Jan 27 17:33:54 PST 2021

Issue #3264 has been updated by dillon.

Status changed from New to Resolved
Assignee set to dillon

Committed with minor formatting adjustments, nice!


Submit #3264: [PATCH] Clarify XSAVE features, and always use XSAVE

* Author: chicken
* Status: Resolved
* Priority: Normal
* Assignee: dillon
* Category: Kernel
* Target version: master
1) Introduce npx_xcr0_mask, to keep track of which XCR0 features are enabled

2) Always use XSAVE regardless of whether AVX is supported or not. XSAVE may be
   supported without AVX, on certain CPUs and also under hypervisors that expose
   XSAVEOPT without AVX.

1-introduce-npx_xcr0_mask.diff (3.45 KB)
2-always-use-XSAVE.diff (1.96 KB)

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