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Date: Mon, 28 Sep 2020 19:23:51 +0200 From: Paolo Bonzini <pbonzini@...hat.com> To: Ben Gardon <bgardon@...gle.com>, linux-kernel@...r.kernel.org, kvm@...r.kernel.org Cc: Cannon Matthews <cannonmatthews@...gle.com>, Peter Xu <peterx@...hat.com>, Sean Christopherson <sean.j.christopherson@...el.com>, Peter Shier <pshier@...gle.com>, Peter Feiner <pfeiner@...gle.com>, Junaid Shahid <junaids@...gle.com>, Jim Mattson <jmattson@...gle.com>, Yulei Zhang <yulei.kernel@...il.com>, Wanpeng Li <kernellwp@...il.com>, Vitaly Kuznetsov <vkuznets@...hat.com>, Xiao Guangrong <xiaoguangrong.eric@...il.com> Subject: Re: [PATCH 05/22] kvm: mmu: Add functions to handle changed TDP SPTEs On 26/09/20 02:39, Paolo Bonzini wrote: >> + handle_changed_spte(kvm, as_id, >> + gfn + (i * KVM_PAGES_PER_HPAGE(level - 1)), >> + old_child_spte, 0, level - 1); >> + } > Is it worth returning a "flush" value to the caller, to avoid multiple > kvm_flush_remote_tlbs_with_address when e.g. zapping a 3rd-level PTE? Nevermind, this is not possible since you are freeing the page immediately after kvm_flush_remote_tlbs_with_address. Paolo
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