linux-kernel - Re: [PATCH 1/4] KVM: constify kvm_arch_flush_remote_tlbs

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Message-ID: <CAAhV-H7Sr8V7A4DdXx158PJ1dT+9zSgUsFQa1LLuZnq+TFR0aw@mail.gmail.com>
Date:   Sat, 3 Apr 2021 10:28:06 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, kvm <kvm@...r.kernel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        seanjc@...gle.com, "open list:MIPS" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH 1/4] KVM: constify kvm_arch_flush_remote_tlbs_memslot

Reviewed-by: Huacai Chen <chenhuacai@...nel.org>

On Fri, Apr 2, 2021 at 11:58 PM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> memslots are stored in RCU and there should be no need to
> change them.
>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
>  arch/arm64/kvm/arm.c     | 2 +-
>  arch/mips/kvm/mips.c     | 2 +-
>  arch/x86/kvm/mmu/mmu.c   | 2 +-
>  include/linux/kvm_host.h | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
> index 7f06ba76698d..9141730b7963 100644
> --- a/arch/arm64/kvm/arm.c
> +++ b/arch/arm64/kvm/arm.c
> @@ -1268,7 +1268,7 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
>  }
>
>  void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
> -                                       struct kvm_memory_slot *memslot)
> +                                       const struct kvm_memory_slot *memslot)
>  {
>         kvm_flush_remote_tlbs(kvm);
>  }
> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
> index 58a8812e2fa5..7db8234a4407 100644
> --- a/arch/mips/kvm/mips.c
> +++ b/arch/mips/kvm/mips.c
> @@ -997,7 +997,7 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
>  }
>
>  void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
> -                                       struct kvm_memory_slot *memslot)
> +                                       const struct kvm_memory_slot *memslot)
>  {
>         /* Let implementation handle TLB/GVA invalidation */
>         kvm_mips_callbacks->flush_shadow_memslot(kvm, memslot);
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 0d92a269c5fa..f75c677910c9 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -5616,7 +5616,7 @@ void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
>  }
>
>  void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
> -                                       struct kvm_memory_slot *memslot)
> +                                       const struct kvm_memory_slot *memslot)
>  {
>         /*
>          * All current use cases for flushing the TLBs for a specific memslot
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index e6d77353025c..34a974ffc882 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -894,7 +894,7 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot);
>
>  #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
>  void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
> -                                       struct kvm_memory_slot *memslot);
> +                                       const struct kvm_memory_slot *memslot);
>  #else /* !CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT */
>  int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log);
>  int kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log,
> --
> 2.30.1
>
>