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Message-ID: <c4453a4bd13dc8120664fe0bf4db5e391d4748e2.camel@redhat.com>
Subject: Re: [PATCH v2 43/43] KVM: VMX: Don't do full kick when handling
 posted interrupt wakeup
From:   Maxim Levitsky <mlevitsk@redhat.com>
To:     Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        Marc Zyngier <maz@kernel.org>,
        Huacai Chen <chenhuacai@kernel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
        Paul Mackerras <paulus@ozlabs.org>,
        Anup Patel <anup.patel@wdc.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Janosch Frank <frankja@linux.ibm.com>
Cc:     James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Atish Patra <atish.patra@wdc.com>,
        David Hildenbrand <david@redhat.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Claudio Imbrenda <imbrenda@linux.ibm.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>,
        linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu,
        linux-mips@vger.kernel.org, kvm@vger.kernel.org,
        kvm-ppc@vger.kernel.org, kvm-riscv@lists.infradead.org,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        David Matlack <dmatlack@google.com>,
        Oliver Upton <oupton@google.com>,
        Jing Zhang <jingzhangos@google.com>
Date:   Mon, 01 Nov 2021 00:33:40 +0200
In-Reply-To: <01b5edae-aaa9-e96d-daaa-197c0c3a0431@redhat.com>
References: <20211009021236.4122790-1-seanjc@google.com>
         <20211009021236.4122790-44-seanjc@google.com>
         <01b5edae-aaa9-e96d-daaa-197c0c3a0431@redhat.com>
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On Mon, 2021-10-25 at 16:16 +0200, Paolo Bonzini wrote:
> On 09/10/21 04:12, Sean Christopherson wrote:
> > When waking vCPUs in the posted interrupt wakeup handling, do exactly
> > that and no more.  There is no need to kick the vCPU as the wakeup
> > handler just need to get the vCPU task running, and if it's in the guest
> > then it's definitely running.
> 
> And more important, the transition from blocking to running will have 
> gone through sync_pir_to_irr, thus checking ON and manually moving the 
> vector from PIR to RVI.
> 
> Paolo
> 
I also think so, and maybe this can be added to the commit message.

Anyway, last one for the series :)

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>


Best regards,
	Maxim Levitsky