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When comparing vCPU CPUID entries against KVM's supported CPUID, mask off only the dynamic fields/bits instead of skipping the entire entry. Precisely masking bits isn't meaningfully more difficult than skipping entire entries, and will be necessary to maintain test coverage when a future commit enables OSXSAVE by default, i.e. makes one bit in all of CPUID.0x1 dynamic. Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Link: https://lore.kernel.org/r/20241003234337.273364-3-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>