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 19:36:27 +0700
From:   "Suthikulpanit, Suravee" <suravee.suthikulpanit@....com>
To:     Maxim Levitsky <mlevitsk@...hat.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

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?

> 
> 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.

Best Regards,
Suravee Suthikulpanit