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Date: Wed, 30 Sep 2020 11:06:20 -0700 From: Sean Christopherson <sean.j.christopherson@...el.com> To: Ben Gardon <bgardon@...gle.com> Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org, Cannon Matthews <cannonmatthews@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.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 19/22] kvm: mmu: Support write protection for nesting in tdp MMU On Fri, Sep 25, 2020 at 02:22:59PM -0700, Ben Gardon wrote: > diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c > index 12892fc4f146d..e6f5093ba8f6f 100644 > --- a/arch/x86/kvm/mmu/mmu.c > +++ b/arch/x86/kvm/mmu/mmu.c > @@ -1667,6 +1667,11 @@ bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, > write_protected |= __rmap_write_protect(kvm, rmap_head, true); > } > > + if (kvm->arch.tdp_mmu_enabled) > + write_protected = > + kvm_tdp_mmu_write_protect_gfn(kvm, slot, gfn) || > + write_protected; Similar to other comments, this can use |=. > + > return write_protected; > }
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