linux-kernel - Re: [RFC PATCH v2 56/69] KVM: VMX: Move setting of EPT MMU masks to common VT-x code

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Date:   Tue, 6 Jul 2021 16:43:36 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     isaku.yamahata@...el.com, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, erdemaktas@...gle.com,
        Connor Kuehl <ckuehl@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     isaku.yamahata@...il.com,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: Re: [RFC PATCH v2 56/69] KVM: VMX: Move setting of EPT MMU masks to
 common VT-x code

On 03/07/21 00:05, isaku.yamahata@...el.com wrote:
> From: Sean Christopherson <sean.j.christopherson@...el.com>
> 
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
> ---
>   arch/x86/kvm/vmx/main.c | 4 ++++
>   arch/x86/kvm/vmx/vmx.c  | 4 ----
>   2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c
> index c3fefa0e5a63..0d8d2a0a2979 100644
> --- a/arch/x86/kvm/vmx/main.c
> +++ b/arch/x86/kvm/vmx/main.c
> @@ -34,6 +34,10 @@ static __init int vt_hardware_setup(void)
>   	if (ret)
>   		return ret;
>   
> +	if (enable_ept)
> +		kvm_mmu_set_ept_masks(enable_ept_ad_bits,
> +				      cpu_has_vmx_ept_execute_only());
> +
>   	return 0;
>   }
>   
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 77b2b2cf76db..e315a46d1566 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -7644,10 +7644,6 @@ static __init int hardware_setup(void)
>   
>   	set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
>   
> -	if (enable_ept)
> -		kvm_mmu_set_ept_masks(enable_ept_ad_bits,
> -				      cpu_has_vmx_ept_execute_only());
> -
>   	if (!enable_ept)
>   		ept_lpage_level = 0;
>   	else if (cpu_has_vmx_ept_1g_page())
> 

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