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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

Download all files
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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