linux-kernel - Re: [PATCH v5 0/6] KVM: arm64: Add VLPI migration support on GICv4.1

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Date:   Thu, 25 Mar 2021 13:56:11 +0800
From:   Shenming Lu <lushenming@...wei.com>
To:     Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>,
        <linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>,
        Eric Auger <eric.auger@...hat.com>,
        <kvmarm@...ts.cs.columbia.edu>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     Alex Williamson <alex.williamson@...hat.com>,
        <yuzenghui@...wei.com>, <wanghaibin.wang@...wei.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Cornelia Huck <cohuck@...hat.com>
Subject: Re: [PATCH v5 0/6] KVM: arm64: Add VLPI migration support on GICv4.1

On 2021/3/25 2:19, Marc Zyngier wrote:
> On Mon, 22 Mar 2021 14:01:52 +0800, Shenming Lu wrote:
>> In GICv4.1, migration has been supported except for (directly-injected)
>> VLPI. And GICv4.1 Spec explicitly gives a way to get the VLPI's pending
>> state (which was crucially missing in GICv4.0). So we make VLPI migration
>> capable on GICv4.1 in this series.
>>
>> In order to support VLPI migration, we need to save and restore all
>> required configuration information and pending states of VLPIs. But
>> in fact, the configuration information of VLPIs has already been saved
>> (or will be reallocated on the dst host...) in vgic(kvm) migration.
>> So we only have to migrate the pending states of VLPIs specially.
>>
>> [...]
> 
> Applied to next, thanks!

Thanks a lot again for all the comments and suggestions. :-)

Shenming

> 
> [1/6] irqchip/gic-v3-its: Add a cache invalidation right after vPE unmapping
>       commit: 301beaf19739cb6e640ed44e630e7da993f0ecc8
> [2/6] irqchip/gic-v3-its: Drop the setting of PTZ altogether
>       commit: c21bc068cdbe5613d3319ae171c3f2eb9f321352
> [3/6] KVM: arm64: GICv4.1: Add function to get VLPI state
>       commit: 80317fe4a65375fae668672a1398a0fb73eb9023
> [4/6] KVM: arm64: GICv4.1: Try to save VLPI state in save_pending_tables
>       commit: f66b7b151e00427168409f8c1857970e926b1e27
> [5/6] KVM: arm64: GICv4.1: Restore VLPI pending state to physical side
>       commit: 12df7429213abbfa9632ab7db94f629ec309a58b
> [6/6] KVM: arm64: GICv4.1: Give a chance to save VLPI state
>       commit: 8082d50f4817ff6a7e08f4b7e9b18e5f8bfa290d
> 
> Cheers,
> 
> 	M.
>