linux-kernel - Re: [PATCH] KVM: x86: Drop unused check_apicv_inhibit

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Date: Tue, 21 May 2024 12:57:33 -0400
From: Alejandro Jimenez <alejandro.j.jimenez@...cle.com>
To: Hou Wenlong <houwenlong.hwl@...group.com>, kvm@...r.kernel.org
Cc: Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        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>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: x86: Drop unused check_apicv_inhibit_reasons()
 callback definition



On 5/6/24 02:35, Hou Wenlong wrote:
> The check_apicv_inhibit_reasons() callback implementation was dropped in
> the commit b3f257a84696 ("KVM: x86: Track required APICv inhibits with
> variable, not callback"), but the definition removal was missed in the
> final version patch (it was removed in the v4). Therefore, it should be
> dropped, and the vmx_check_apicv_inhibit_reasons() function declaration
> should also be removed.
> 
> Signed-off-by: Hou Wenlong <houwenlong.hwl@...group.com>

Reviewed-by: Alejandro Jimenez <alejandro.j.jimenez@...cle.com>

> ---
>   arch/x86/include/asm/kvm_host.h | 1 -
>   arch/x86/kvm/vmx/x86_ops.h      | 1 -
>   2 files changed, 2 deletions(-)
> 
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 1d13e3cd1dc5..a10d7f75c126 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1702,7 +1702,6 @@ struct kvm_x86_ops {
>   	void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
>   	void (*enable_irq_window)(struct kvm_vcpu *vcpu);
>   	void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
> -	bool (*check_apicv_inhibit_reasons)(enum kvm_apicv_inhibit reason);
>   	const unsigned long required_apicv_inhibits;
>   	bool allow_apicv_in_x2apic_without_x2apic_virtualization;
>   	void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu);
> diff --git a/arch/x86/kvm/vmx/x86_ops.h b/arch/x86/kvm/vmx/x86_ops.h
> index 502704596c83..4cea42bcb11f 100644
> --- a/arch/x86/kvm/vmx/x86_ops.h
> +++ b/arch/x86/kvm/vmx/x86_ops.h
> @@ -46,7 +46,6 @@ bool vmx_apic_init_signal_blocked(struct kvm_vcpu *vcpu);
>   void vmx_migrate_timers(struct kvm_vcpu *vcpu);
>   void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu);
>   void vmx_apicv_pre_state_restore(struct kvm_vcpu *vcpu);
> -bool vmx_check_apicv_inhibit_reasons(enum kvm_apicv_inhibit reason);
>   void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr);
>   void vmx_hwapic_isr_update(int max_isr);
>   bool vmx_guest_apic_has_interrupt(struct kvm_vcpu *vcpu);