linux-kernel - Re: [PATCH 03/13] kvm: monolithic: fixup x86-32 build

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Message-ID: <6ed4a5cd-38b1-04f8-e3d5-3327a1bd5d87@redhat.com>
Date:   Tue, 5 Nov 2019 11:04:16 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Andrea Arcangeli <aarcange@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: Re: [PATCH 03/13] kvm: monolithic: fixup x86-32 build

On 04/11/19 23:59, Andrea Arcangeli wrote:
> kvm_x86_set_hv_timer and kvm_x86_cancel_hv_timer needs to be defined
> to succeed the 32bit kernel build, but they can't be called.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
> ---
>  arch/x86/kvm/vmx/vmx.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index bd17ad61f7e3..1a58ae38c8f2 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -7195,6 +7195,17 @@ void kvm_x86_cancel_hv_timer(struct kvm_vcpu *vcpu)
>  {
>  	to_vmx(vcpu)->hv_deadline_tsc = -1;
>  }
> +#else
> +int kvm_x86_set_hv_timer(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc,
> +			 bool *expired)
> +{
> +	BUG();
> +}
> +
> +void kvm_x86_cancel_hv_timer(struct kvm_vcpu *vcpu)
> +{
> +	BUG();
> +}
>  #endif
>  
>  void kvm_x86_sched_in(struct kvm_vcpu *vcpu, int cpu)
> 

I'll check for how long this has been broken.  It may be the proof that
we can actually drop 32-bit KVM support.

Paolo