KVM: x86/mmu: Skip remote TLB flush when zapping all of TDP MMU

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Don't flush the TLBs when zapping all TDP MMU pages, as the only time KVM
uses the slow version of "zap everything" is when the VM is being
destroyed or the owning mm has exited.  In either case, KVM_RUN is
unreachable for the VM, i.e. the guest TLB entries cannot be consumed.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Message-Id: <20220226001546.360188-15-seanjc@google.com>
Reviewed-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2022-02-26 00:15:32 +00:00 • committed by Paolo Bonzini

parent c10743a182

commit 77c8cd6b85

1 changed files with 6 additions and 5 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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