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Submit #3264

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[PATCH] Clarify XSAVE features, and always use XSAVE

Added by Anonymous almost 4 years ago. Updated almost 4 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
dillon
Category:
Kernel
Target version:
6.2
Start date:
01/15/2021
Due date:
% Done:

0%

Estimated time:

Description

1) Introduce npx_xcr0_mask, to keep track of which XCR0 features are enabled
system-wide.

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.

Files

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1-introduce-npx_xcr0_mask.diff (3.45 KB) 1-introduce-npx_xcr0_mask.diff Anonymous, 01/15/2021 11:44 PM
2-always-use-XSAVE.diff (1.96 KB) 2-always-use-XSAVE.diff Anonymous, 01/15/2021 11:44 PM
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 #1

Updated by dillon almost 4 years ago

  • Status changed from New to Resolved
  • Assignee set to dillon

Committed with minor formatting adjustments, nice!

-Matt

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