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 cleacpuid 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. v4: Rebase to latest tree. Repost. v5: Fix dependency algorithm. Clean dups in table. Rebase. v6: Rebase. No changes to code. v7: Rebase. No changes to code. v8: Address all review comments. Add Reviewed-bys. Dependency checker restructured for feature->dependency Add missing dependency for AVX->AVX512F v9: Remove redundant dependency AVX512F->XSAVE Add dependencies for SHA_NI->XMM, XMM->FXSR, FXSR_OPT->FXSR
