KVM: selftests: Test post-KVM_RUN writes to PERF_CAPABILITIES
Now that KVM disallows changing PERF_CAPABILITIES after KVM_RUN, expand the host side checks to verify KVM rejects any attempts to change bits from userspace. Link: https://lore.kernel.org/r/20230311004618.920745-18-seanjc@google.com Signed-off-by:Sean Christopherson <seanjc@google.com>
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