linux-kernel - Re: [PATCH v3 03/12] KVM: x86/mmu: rename try_async_pf to kvm_faultin

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Date:   Tue, 3 Aug 2021 11:00:29 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Maxim Levitsky <mlevitsk@...hat.com>, kvm@...r.kernel.org
Cc:     Wanpeng Li <wanpengli@...cent.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Joerg Roedel <joro@...tes.org>, Borislav Petkov <bp@...en8.de>,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v3 03/12] KVM: x86/mmu: rename try_async_pf to
 kvm_faultin_pfn

On 02/08/21 20:33, Maxim Levitsky wrote:
> try_async_pf is a wrong name for this function, since this code
> is used when asynchronous page fault is not enabled as well.
> 
> This code is based on a patch from Sean Christopherson:
> https://lkml.org/lkml/2021/7/19/2970
> 
> Suggested-by: Sean Christopherson <seanjc@...gle.com>
> Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
> ---
>   arch/x86/kvm/mmu/mmu.c         | 4 ++--
>   arch/x86/kvm/mmu/paging_tmpl.h | 2 +-
>   2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 9da635e383c2..c5e0ecf5f758 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -3842,7 +3842,7 @@ static bool kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
>   				  kvm_vcpu_gfn_to_hva(vcpu, gfn), &arch);
>   }
>   
> -static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
> +static bool kvm_faultin_pfn(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
>   			 gpa_t cr2_or_gpa, kvm_pfn_t *pfn, hva_t *hva,
>   			 bool write, bool *writable)
>   {
> @@ -3912,7 +3912,7 @@ static int direct_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
>   	mmu_seq = vcpu->kvm->mmu_notifier_seq;
>   	smp_rmb();
>   
> -	if (try_async_pf(vcpu, prefault, gfn, gpa, &pfn, &hva,
> +	if (kvm_faultin_pfn(vcpu, prefault, gfn, gpa, &pfn, &hva,
>   			 write, &map_writable))
>   		return RET_PF_RETRY;
>   
> diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
> index ee044d357b5f..f349eae69bf3 100644
> --- a/arch/x86/kvm/mmu/paging_tmpl.h
> +++ b/arch/x86/kvm/mmu/paging_tmpl.h
> @@ -881,7 +881,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gpa_t addr, u32 error_code,
>   	mmu_seq = vcpu->kvm->mmu_notifier_seq;
>   	smp_rmb();
>   
> -	if (try_async_pf(vcpu, prefault, walker.gfn, addr, &pfn, &hva,
> +	if (kvm_faultin_pfn(vcpu, prefault, walker.gfn, addr, &pfn, &hva,
>   			 write_fault, &map_writable))
>   		return RET_PF_RETRY;
>   
> 

Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>