On Thu, Jan 30, 2020 at 06:44:09AM +0100, Paolo Bonzini wrote:

On 30/01/20 01:10, Sean Christopherson wrote:

quoted

Set kvm_x86_ops with the vendor's ops only after ->hardware_setup()
completes to "prevent" using kvm_x86_ops before they are ready, i.e. to
generate a null pointer fault instead of silently consuming unconfigured
state.

What about even copying kvm_x86_ops by value, so that they can be
accessed with "kvm_x86_ops.callback()" and save one memory access?

Oooh, I like that idea.  And {svm,vmx}_x86_ops could be marked __initdata
to save a few bytes and force all the runtime stuff through kvm_x86_ops.

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