KVM: x86/mmu: Remove spurious TLB flushes in TDP MMU zap collapsible path
[ Upstream commit 4b85c921 ] Drop the "flush" param and return values to/from the TDP MMU's helper for zapping collapsible SPTEs. Because the helper runs with mmu_lock held for read, not write, it uses tdp_mmu_zap_spte_atomic(), and the atomic zap handles the necessary remote TLB flush. Similarly, because mmu_lock is dropped and re-acquired between zapping legacy MMUs and zapping TDP MMUs, kvm_mmu_zap_collapsible_sptes() must handle remote TLB flushes from the legacy MMU before calling into the TDP MMU. Fixes: e2209710 ("KVM: x86/mmu: Skip rmap operations if rmaps not allocated") Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20211120045046.3940942-4-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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