KVM: selftests: Add helpers to get and modify a vCPU's CPUID entries

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Add helpers to get a specific CPUID entry for a given vCPU, and to toggle
a specific CPUID-based feature for a vCPU.  The helpers will reduce the
amount of boilerplate code needed to tweak a vCPU's CPUID model, improve
code clarity, and most importantly move tests away from modifying the
static "cpuid" returned by kvm_get_supported_cpuid().

Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-23-seanjc@google.com

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Sean Christopherson 2022-06-14 20:06:47 +00:00

parent 662162fed2

commit c41880b5f0

2 changed files with 48 additions and 0 deletions

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30

tools/testing/selftests/kvm/include/x86_64/processor.h

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tools/testing/selftests/kvm/lib/x86_64/processor.c

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