linux-kernel - Re: [RFC PATCH v5 079/104] KVM: TDX: Implements vcpu request_immediate

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Message-ID: <24bf735f-1f63-277e-02f1-dff90d5cfbab@redhat.com>
Date:   Wed, 6 Apr 2022 14:49:16 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     isaku.yamahata@...il.com, Jim Mattson <jmattson@...gle.com>,
        erdemaktas@...gle.com, Connor Kuehl <ckuehl@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: Re: [RFC PATCH v5 079/104] KVM: TDX: Implements vcpu
 request_immediate_exit

On 3/4/22 20:49, isaku.yamahata@...el.com wrote:
> From: Isaku Yamahata <isaku.yamahata@...el.com>
> 
> Now we are able to inject interrupts into TDX vcpu, it's ready to block TDX
> vcpu.  Wire up kvm x86 methods for blocking/unblocking vcpu for TDX.  To
> unblock on pending events, request immediate exit methods is also needed.
> 
> Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
> ---
>   arch/x86/kvm/vmx/main.c | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kvm/vmx/main.c b/arch/x86/kvm/vmx/main.c
> index a0bcc4dca678..404a260796e4 100644
> --- a/arch/x86/kvm/vmx/main.c
> +++ b/arch/x86/kvm/vmx/main.c
> @@ -280,6 +280,14 @@ static void vt_enable_irq_window(struct kvm_vcpu *vcpu)
>   	vmx_enable_irq_window(vcpu);
>   }
>   
> +static void vt_request_immediate_exit(struct kvm_vcpu *vcpu)
> +{
> +	if (is_td_vcpu(vcpu))
> +		return __kvm_request_immediate_exit(vcpu);
> +
> +	vmx_request_immediate_exit(vcpu);
> +}
> +
>   static int vt_mem_enc_op(struct kvm *kvm, void __user *argp)
>   {
>   	if (!is_td(kvm))
> @@ -402,7 +410,7 @@ struct kvm_x86_ops vt_x86_ops __initdata = {
>   	.check_intercept = vmx_check_intercept,
>   	.handle_exit_irqoff = vmx_handle_exit_irqoff,
>   
> -	.request_immediate_exit = vmx_request_immediate_exit,
> +	.request_immediate_exit = vt_request_immediate_exit,
>   
>   	.sched_in = vt_sched_in,
>   

Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>