linux-kernel - Re: [PATCH v4 5/7] KVM: VMX: Optimize posted-interrupt delivery for timer fastpath

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Date:   Thu, 30 Apr 2020 15:32:16 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Wanpeng Li <kernellwp@...il.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Haiwei Li <lihaiwei@...cent.com>
Subject: Re: [PATCH v4 5/7] KVM: VMX: Optimize posted-interrupt delivery for
 timer fastpath

On 28/04/20 08:23, Wanpeng Li wrote:
> -	if (exit_fastpath == EXIT_FASTPATH_REENTER_GUEST &&
> -	    kvm_vcpu_exit_request(vcpu))
> -		exit_fastpath = EXIT_FASTPATH_NOP;
> +	if (exit_fastpath == EXIT_FASTPATH_REENTER_GUEST) {
> +		if (!kvm_vcpu_exit_request(vcpu))
> +			vmx_sync_pir_to_irr(vcpu);
> +		else
> +			exit_fastpath = EXIT_FASTPATH_NOP;
> +	}

This part should be in patch 3; not a big deal, I can reorganize that
myself.

Paolo