linux-kernel - Re: [PATCH v6 01/11] KVM: Rename kvm_arch_flush_remote_tlb() to kvm_arch_flush_remote

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Message-ID: <4f465d66-baa3-88bc-86f5-d88cc0a73441@redhat.com>
Date:   Mon, 17 Jul 2023 19:06:09 +0800
From:   Shaoqin Huang <shahuang@...hat.com>
To:     Raghavendra Rao Ananta <rananta@...gle.com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...shpatra.org>,
        Jing Zhang <jingzhangos@...gle.com>,
        Colton Lewis <coltonlewis@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-mips@...r.kernel.org, kvm-riscv@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Gavin Shan <gshan@...hat.com>
Subject: Re: [PATCH v6 01/11] KVM: Rename kvm_arch_flush_remote_tlb() to
 kvm_arch_flush_remote_tlbs()



On 7/15/23 08:53, Raghavendra Rao Ananta wrote:
> From: David Matlack <dmatlack@...gle.com>
> 
> Rename kvm_arch_flush_remote_tlb() and the associated macro
> __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB to kvm_arch_flush_remote_tlbs() and
> __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS respectively.
> 
> Making the name plural matches kvm_flush_remote_tlbs() and makes it more
> clear that this function can affect more than one remote TLB.
> 
> No functional change intended.
> 
> Signed-off-by: David Matlack <dmatlack@...gle.com>
> Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>
> Reviewed-by: Gavin Shan <gshan@...hat.com>
Reviewed-by: Shaoqin Huang <shahuang@...hat.com>
> ---
>   arch/mips/include/asm/kvm_host.h | 4 ++--
>   arch/mips/kvm/mips.c             | 2 +-
>   arch/x86/include/asm/kvm_host.h  | 4 ++--
>   include/linux/kvm_host.h         | 4 ++--
>   virt/kvm/kvm_main.c              | 2 +-
>   5 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
> index 04cedf9f8811..9b0ad8f3bf32 100644
> --- a/arch/mips/include/asm/kvm_host.h
> +++ b/arch/mips/include/asm/kvm_host.h
> @@ -896,7 +896,7 @@ static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>   static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
>   static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
>   
> -#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
> -int kvm_arch_flush_remote_tlb(struct kvm *kvm);
> +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
> +int kvm_arch_flush_remote_tlbs(struct kvm *kvm);
>   
>   #endif /* __MIPS_KVM_HOST_H__ */
> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
> index aa5583a7b05b..4b7bc39a4173 100644
> --- a/arch/mips/kvm/mips.c
> +++ b/arch/mips/kvm/mips.c
> @@ -981,7 +981,7 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
>   
>   }
>   
> -int kvm_arch_flush_remote_tlb(struct kvm *kvm)
> +int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
>   {
>   	kvm_mips_callbacks->prepare_flush_shadow(kvm);
>   	return 1;
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 28bd38303d70..a2d3cfc2eb75 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1794,8 +1794,8 @@ static inline struct kvm *kvm_arch_alloc_vm(void)
>   #define __KVM_HAVE_ARCH_VM_FREE
>   void kvm_arch_free_vm(struct kvm *kvm);
>   
> -#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
> -static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
> +#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
> +static inline int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
>   {
>   	if (kvm_x86_ops.flush_remote_tlbs &&
>   	    !static_call(kvm_x86_flush_remote_tlbs)(kvm))
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 9d3ac7720da9..e3f968b38ae9 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -1479,8 +1479,8 @@ static inline void kvm_arch_free_vm(struct kvm *kvm)
>   }
>   #endif
>   
> -#ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
> -static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm)
> +#ifndef __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
> +static inline int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
>   {
>   	return -ENOTSUPP;
>   }
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index dfbaafbe3a00..70e5479797ac 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -361,7 +361,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
>   	 * kvm_make_all_cpus_request() reads vcpu->mode. We reuse that
>   	 * barrier here.
>   	 */
> -	if (!kvm_arch_flush_remote_tlb(kvm)
> +	if (!kvm_arch_flush_remote_tlbs(kvm)
>   	    || kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
>   		++kvm->stat.generic.remote_tlb_flush;
>   }

-- 
Shaoqin