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authorKai Huang <kai.huang@intel.com>2022-07-28 15:04:52 +1200
committerPaolo Bonzini <pbonzini@redhat.com>2022-07-28 14:02:07 -0400
commit7edc3a68038ab151a8791ddb6217755a5e4a5809 (patch)
tree61bb11f29af7cd85bd28d1cb593a585b7f80979f /virt/kvm
parent6fac42f127b8e8464b8c13036dfed825981881d9 (diff)
KVM, x86/mmu: Fix the comment around kvm_tdp_mmu_zap_leafs()
Now kvm_tdp_mmu_zap_leafs() only zaps leaf SPTEs but not any non-root pages within that GFN range anymore, so the comment around it isn't right. Fix it by shifting the comment from tdp_mmu_zap_leafs() instead of duplicating it, as tdp_mmu_zap_leafs() is static and is only called by kvm_tdp_mmu_zap_leafs(). Opportunistically tweak the blurb about SPTEs being cleared to (a) say "zapped" instead of "cleared" because "cleared" will be wrong if/when KVM allows a non-zero value for non-present SPTE (i.e. for Intel TDX), and (b) to clarify that a flush is needed if and only if a SPTE has been zapped since MMU lock was last acquired. Fixes: f47e5bbbc92f ("KVM: x86/mmu: Zap only TDP MMU leafs in zap range and mmu_notifier unmap") Suggested-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Kai Huang <kai.huang@intel.com> Message-Id: <20220728030452.484261-1-kai.huang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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