linux-kernel - Re: [PATCH v6 15/17] KVM: SVM: Use target APIC ID to complete x2AVIC IRQs when possible

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Date:   Tue, 28 Jun 2022 16:14:58 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     "Suthikulpanit, Suravee" <suravee.suthikulpanit@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     seanjc@...gle.com, joro@...tes.org, jon.grimm@....com,
        wei.huang2@....com, terry.bowman@....com
Subject: Re: [PATCH v6 15/17] KVM: SVM: Use target APIC ID to complete
 x2AVIC IRQs when possible

On Tue, 2022-06-28 at 19:36 +0700, Suthikulpanit, Suravee wrote:
> Paolo / Maxim
> 
> On 6/28/2022 3:59 PM, Maxim Levitsky wrote:
> > > > Hi Paolo and Suravee Suthikulpanit!
> > > > 
> > > > Note that this patch is not needed anymore, I fixed the avic_kick_target_vcpus_fast function,
> > > > and added the support for x2apic because it was very easy to do
> > > > (I already needed to parse logical id for flat and cluser modes)
> > > > 
> > > > Best regards,
> > > > 	Maxim Levitsky
> > > > 
> > > Understood. I was about to send v7 to remove this patch from the series, but too late. I'll test the current queue branch and provide update.
> > Also this really needs a KVM unit test, to avoid breaking corner cases like
> > sending IPI to 0xFF address, which was the reason I had to fix the
> > avic_kick_target_vcpus_fast.
> > 
> > We do have 'apic' test in kvm unit tests,
> > and I was already looking to extend it to cover more cases and to run it with AVIC's
> > compatible settings. I hope I will be able to do this this week.
> 
> Thanks. Would you please CC me as well once ready?

Of course!
> 
> > Best regards,
> > 	Maxim Levitsky
> 
> I have also submitted a patch to fix the 603ccef42ce9 ("KVM: x86: SVM: fix avic_kick_target_vcpus_fast"),
> which was queued previously.

Thank you very much!

Best regards,
	Maxim Levitsky


> 
> Best Regards,
> Suravee Suthikulpanit
>