linux-kernel - Re: [RFC PATCH v3 16/59] KVM: x86: Add per-VM flag to disable direct IRQ injection

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Message-ID: <87o868jalo.ffs@tglx>
Date:   Thu, 25 Nov 2021 20:31:31 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     isaku.yamahata@...el.com, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, erdemaktas@...gle.com,
        Connor Kuehl <ckuehl@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     isaku.yamahata@...el.com, isaku.yamahata@...il.com,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: Re: [RFC PATCH v3 16/59] KVM: x86: Add per-VM flag to disable
 direct IRQ injection

On Wed, Nov 24 2021 at 16:19, isaku yamahata wrote:
> From: Sean Christopherson <sean.j.christopherson@...el.com>
>
> Add a flag to disable IRQ injection, which is not supported by TDX.
...
> @@ -4506,7 +4506,8 @@ static int kvm_vcpu_ready_for_interrupt_injection(struct kvm_vcpu *vcpu)
>  static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
>  				    struct kvm_interrupt *irq)
>  {
> -	if (irq->irq >= KVM_NR_INTERRUPTS)
> +	if (irq->irq >= KVM_NR_INTERRUPTS ||
> +	    vcpu->kvm->arch.irq_injection_disallowed)
>  		return -EINVAL;

That's required here because you forgot to copy & pasta the protect
guest condition muck into that ioctl, right?