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Rewrite the comment in kvm_mmu_slot_remove_write_access() that explains
why it is safe to flush TLBs outside of the MMU lock after
write-protecting SPTEs for dirty logging. The current comment is a long
run-on sentence that was difficult to understand. In addition it was
specific to the shadow MMU (mentioning mmu_spte_update()) when the TDP
MMU has to handle this as well.
The new comment explains:
- Why the TLB flush is necessary at all.
- Why it is desirable to do the TLB flush outside of the MMU lock.
- Why it is safe to do the TLB flush outside of the MMU lock.
No functional change intended.
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220113233020.3986005-5-dmatlack@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
6ff94f27fd