linux-kernel - Re: [RFC PATCH 3/6] KVM: X86: Add arguement gfn and role to kvm_mmu_alloc

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Message-ID: <YdSzzOLTIOhFz7ys@google.com>
Date:   Tue, 4 Jan 2022 20:53:32 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Lai Jiangshan <jiangshanlai@...il.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [RFC PATCH 3/6] KVM: X86: Add arguement gfn and role to
 kvm_mmu_alloc_page()

On Fri, Dec 10, 2021, Lai Jiangshan wrote:
> From: Lai Jiangshan <laijs@...ux.alibaba.com>
> 
> kvm_mmu_alloc_page() will access to more bits of the role.
> 
> Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
> ---
>  arch/x86/kvm/mmu/mmu.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> index 846a2e426e0b..54e7cbc15380 100644
> --- a/arch/x86/kvm/mmu/mmu.c
> +++ b/arch/x86/kvm/mmu/mmu.c
> @@ -1734,13 +1734,13 @@ static void drop_parent_pte(struct kvm_mmu_page *sp,
>  	mmu_spte_clear_no_track(parent_pte);
>  }
>  
> -static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, int direct)
> +static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, gfn_t gfn, union kvm_mmu_page_role role)

Please wrap the union param to a new line.  Checkpatch now warns at 100 chars, but
80 is still the guideline (checkpatch was tweaked so that people would stop adding
really awkward newlines just to honor the 80 char limit).