linux-kernel - Re: [PATCH 2/6] KVM: x86: Use kvm_x86_ops in kvm_arch_check_processor

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Date:   Mon, 10 Jan 2022 21:10:10 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Chao Gao <chao.gao@...el.com>
Cc:     kvm@...r.kernel.org, pbonzini@...hat.com, kevin.tian@...el.com,
        tglx@...utronix.de, Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, 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>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/6] KVM: x86: Use kvm_x86_ops in
 kvm_arch_check_processor_compat

On Mon, Dec 27, 2021, Chao Gao wrote:
> check_processor_compatibility() is a "runtime" ops now. Use
> kvm_x86_ops directly such that kvm_arch_check_processor_compat
> can be called at runtime.
> 
> Signed-off-by: Chao Gao <chao.gao@...el.com>
> ---
>  arch/x86/kvm/x86.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 6411417b6871..770b68e72391 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -11383,7 +11383,6 @@ void kvm_arch_hardware_unsetup(void)
>  int kvm_arch_check_processor_compat(void *opaque)
>  {
>  	struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
> -	struct kvm_x86_init_ops *ops = opaque;
>  
>  	WARN_ON(!irqs_disabled());
>  
> @@ -11391,7 +11390,7 @@ int kvm_arch_check_processor_compat(void *opaque)
>  	    __cr4_reserved_bits(cpu_has, &boot_cpu_data))
>  		return -EIO;
>  
> -	return ops->runtime_ops->check_processor_compatibility();
> +	return kvm_x86_ops.check_processor_compatibility();

I'd just squash this with patch 01.  And might as well make this a static_call().

>  }
>  
>  bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu)
> -- 
> 2.25.1
>