linux-kernel - Re: [PATCH v3 5/8] KVM: X86: Rename cpuid_update() to update_vcpu

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Date:   Wed, 8 Jul 2020 14:08:18 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Xiaoyao Li <xiaoyao.li@...el.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Jim Mattson <jmattson@...gle.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH v3 5/8] KVM: X86: Rename cpuid_update() to
 update_vcpu_model()

On 08/07/20 08:50, Xiaoyao Li wrote:
> The name of callback cpuid_update() is misleading that it's not about
> updating CPUID settings of vcpu but updating the configurations of vcpu
> based on the CPUIDs. So rename it to update_vcpu_model().
> 
> Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>

With the change suggested in the previous patch, this one becomes
unnecessary (or you can rename it to update_cpuid).  While you're at it,
you could also move the call in kvm_update_cpuid.

Paolo

> ---
>  arch/x86/include/asm/kvm_host.h | 2 +-
>  arch/x86/kvm/cpuid.c            | 4 ++--
>  arch/x86/kvm/svm/svm.c          | 4 ++--
>  arch/x86/kvm/vmx/nested.c       | 2 +-
>  arch/x86/kvm/vmx/vmx.c          | 4 ++--
>  5 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 97cb005c7aa7..c35d14b257c9 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1051,7 +1051,7 @@ struct kvm_x86_ops {
>  	void (*hardware_unsetup)(void);
>  	bool (*cpu_has_accelerated_tpr)(void);
>  	bool (*has_emulated_msr)(u32 index);
> -	void (*cpuid_update)(struct kvm_vcpu *vcpu);
> +	void (*update_vcpu_model)(struct kvm_vcpu *vcpu);
>  
>  	unsigned int vm_size;
>  	int (*vm_init)(struct kvm *kvm);
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index 001f5a94880e..d2f93823f9fd 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -224,7 +224,7 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
>  
>  	cpuid_fix_nx_cap(vcpu);
>  	kvm_apic_set_version(vcpu);
> -	kvm_x86_ops.cpuid_update(vcpu);
> +	kvm_x86_ops.update_vcpu_model(vcpu);
>  	kvm_update_cpuid(vcpu);
>  	kvm_update_vcpu_model(vcpu);
>  
> @@ -254,7 +254,7 @@ int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
>  	}
>  
>  	kvm_apic_set_version(vcpu);
> -	kvm_x86_ops.cpuid_update(vcpu);
> +	kvm_x86_ops.update_vcpu_model(vcpu);
>  	kvm_update_cpuid(vcpu);
>  	kvm_update_vcpu_model(vcpu);
>  out:
> diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
> index 74096aa72ad9..01f359e590d5 100644
> --- a/arch/x86/kvm/svm/svm.c
> +++ b/arch/x86/kvm/svm/svm.c
> @@ -3550,7 +3550,7 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
>  	return 0;
>  }
>  
> -static void svm_cpuid_update(struct kvm_vcpu *vcpu)
> +static void svm_update_vcpu_model(struct kvm_vcpu *vcpu)
>  {
>  	struct vcpu_svm *svm = to_svm(vcpu);
>  
> @@ -4050,7 +4050,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
>  
>  	.get_exit_info = svm_get_exit_info,
>  
> -	.cpuid_update = svm_cpuid_update,
> +	.update_vcpu_model = svm_update_vcpu_model,
>  
>  	.has_wbinvd_exit = svm_has_wbinvd_exit,
>  
> diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
> index b627c5f36b9e..85080a5b8d3c 100644
> --- a/arch/x86/kvm/vmx/nested.c
> +++ b/arch/x86/kvm/vmx/nested.c
> @@ -6354,7 +6354,7 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps)
>  
>  	/*
>  	 * secondary cpu-based controls.  Do not include those that
> -	 * depend on CPUID bits, they are added later by vmx_cpuid_update.
> +	 * depend on CPUID bits, they are added later by vmx_update_vcpu_model.
>  	 */
>  	if (msrs->procbased_ctls_high & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
>  		rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 8187ca152ad2..4673c84b54ac 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -7257,7 +7257,7 @@ static void update_intel_pt_cfg(struct kvm_vcpu *vcpu)
>  		vmx->pt_desc.ctl_bitmask &= ~(0xfULL << (32 + i * 4));
>  }
>  
> -static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
> +static void vmx_update_vcpu_model(struct kvm_vcpu *vcpu)
>  {
>  	struct vcpu_vmx *vmx = to_vmx(vcpu);
>  
> @@ -7915,7 +7915,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
>  
>  	.get_exit_info = vmx_get_exit_info,
>  
> -	.cpuid_update = vmx_cpuid_update,
> +	.update_vcpu_model = vmx_update_vcpu_model,
>  
>  	.has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
>  
>