Re: [PATCH] KVM: VMX: Move bus lock handler from main.c => common.h

[Xiaoyao Li]

On 9/22/2026 8:01 AM, Sean Christopherson wrote:
> Move the bus lock VM-Exit handler, which is basically a one-liner, from
> main.c to vmx.h now that to_vt() is usable in common.h.
> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> ---
> 
> This applies on top of kvm-x86/next + Xiayao's series.  I.e. actually applying
> it will be painful for anyone but me at this point, but I'm really just posting
> for posterity.

It seems like squashing it into patch 7 of my series would be OK as well. I
guess you intended to avoid changing my series since it might require a new
version.

Anyway,

Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
>  arch/x86/kvm/vmx/common.h | 11 ++++++++++-
>  arch/x86/kvm/vmx/main.c   | 11 -----------
>  2 files changed, 10 insertions(+), 12 deletions(-)
> 
> diff --git a/arch/x86/kvm/vmx/common.h b/arch/x86/kvm/vmx/common.h
> index e22c159c3b84..b2905335a2d2 100644
> --- a/arch/x86/kvm/vmx/common.h
> +++ b/arch/x86/kvm/vmx/common.h
> @@ -254,6 +254,15 @@ static inline int __vt_handle_notify(struct kvm_vcpu *vcpu,
>  	return 1;
>  }
>  
> -int vt_handle_bus_lock_vmexit(struct kvm_vcpu *vcpu);
> +static inline int vt_handle_bus_lock_vmexit(struct kvm_vcpu *vcpu)
> +{
> +	/*
> +	 * Hardware may or may not set the BUS_LOCK_DETECTED flag on BUS_LOCK
> +	 * VM-Exits. Unconditionally set the flag here and leave the handling
> +	 * to .handle_exit() callback.
> +	 */
> +	to_vt(vcpu)->exit_reason.bus_lock_detected = true;
> +	return 1;
> +}
>  
>  #endif /* __KVM_X86_VMX_COMMON_H */
> diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c
> index c11732cfadf0..2985742e20f1 100644
> --- a/arch/x86/kvm/vmx/main.c
> +++ b/arch/x86/kvm/vmx/main.c
> @@ -872,17 +872,6 @@ static int vt_gmem_max_mapping_level(struct kvm *kvm, kvm_pfn_t pfn,
>  #define vt_op_tdx_only(name) NULL
>  #endif /* CONFIG_KVM_INTEL_TDX */
>  
> -int vt_handle_bus_lock_vmexit(struct kvm_vcpu *vcpu)
> -{
> -	/*
> -	 * Hardware may or may not set the BUS_LOCK_DETECTED flag on BUS_LOCK
> -	 * VM-Exits. Unconditionally set the flag here and leave the handling
> -	 * to .handle_exit() callback.
> -	 */
> -	to_vt(vcpu)->exit_reason.bus_lock_detected = true;
> -	return 1;
> -}
> -
>  noinstr void vt_handle_nmi(struct kvm_vcpu *vcpu)
>  {
>  	if ((u16)vt_get_exit_reason(vcpu).basic != EXIT_REASON_EXCEPTION_NMI ||
> 
> base-commit: e1d8e13452eea815042f79244bb649536e3689f5