linux-kernel - Re: [PATCH v5.5 08/30] KVM: arm64: Use "new" memslot instead of userspace memory region

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Date:   Mon, 8 Nov 2021 22:36:19 -0800
From:   Reiji Watanabe <reijiw@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>, Huacai Chen <chenhuacai@...nel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        Paul Mackerras <paulus@...abs.org>,
        Anup Patel <anup.patel@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>, kvm@...r.kernel.org,
        David Hildenbrand <david@...hat.com>,
        linux-kernel@...r.kernel.org, Atish Patra <atish.patra@....com>,
        Ben Gardon <bgardon@...gle.com>,
        "Maciej S . Szmigiero" <maciej.szmigiero@...cle.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        linux-riscv@...ts.infradead.org, Joerg Roedel <joro@...tes.org>,
        kvmarm@...ts.cs.columbia.edu, kvm-ppc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Jim Mattson <jmattson@...gle.com>,
        Cornelia Huck <cohuck@...hat.com>, linux-mips@...r.kernel.org,
        kvm-riscv@...ts.infradead.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [PATCH v5.5 08/30] KVM: arm64: Use "new" memslot instead of
 userspace memory region

On Wed, Nov 3, 2021 at 5:26 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> Get the slot ID, hva, etc... from the "new" memslot instead of the
> userspace memory region when preparing/committing a memory region.  This
> will allow a future commit to drop @mem from the prepare/commit hooks
> once all architectures convert to using "new".
>
> Opportunistically wait to get the hva begin+end until after filtering out
> the DELETE case in anticipation of a future commit passing NULL for @new
> when deleting a memslot.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Reiji Watanabe <reijiw@...gle.com>