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| Started by | Andi Kleen <andi@firstfloor.org> |
|---|---|
| First post | 2017-06-22 01:50 +0200 |
| Last post | 2017-06-22 01:50 +0200 |
| Articles | 1 — 1 participant |
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Support generic disabling of all XSAVE features Andi Kleen <andi@firstfloor.org> - 2017-06-22 01:50 +0200
| From | Andi Kleen <andi@firstfloor.org> |
|---|---|
| Date | 2017-06-22 01:50 +0200 |
| Subject | Support generic disabling of all XSAVE features |
| Message-ID | <tUXxL-4Ng-3@gated-at.bofh.it> |
For performance testing and debugging it can be useful to disable XSAVE features individually. This patchkit hooks up XSAVE with the generic clearcpuid=... option, so that disabling a CPUID feature automatically disables the respective XSAVE feature. It also cleans up CPUID dependency management. Currently it's possible to generate configurations with clearcpuid that crash. It replaces an earlier patchkit that did this with special case options. v1: Initial post v2: Work around broken lguest by exporting set_cpu_cap Repost with cover letter v3: Repost. No changes to code.
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