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Subject: Re: [PATCH v5 21/23] KVM: arm64: GICv4.1: Reload VLPI configuration
 on distributor enable/disable
To:     Marc Zyngier <maz@kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <kvmarm@lists.cs.columbia.edu>, <kvm@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
CC:     Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Jason Cooper <jason@lakedaemon.net>,
        Robert Richter <rrichter@marvell.com>,
        "Thomas Gleixner" <tglx@linutronix.de>,
        Eric Auger <eric.auger@redhat.com>,
        "James Morse" <james.morse@arm.com>,
        Julien Thierry <julien.thierry.kdev@gmail.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>
References: <20200304203330.4967-1-maz@kernel.org>
 <20200304203330.4967-22-maz@kernel.org>
From:   Zenghui Yu <yuzenghui@huawei.com>
Message-ID: <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com>
Date:   Wed, 18 Mar 2020 11:17:57 +0800
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On 2020/3/5 4:33, Marc Zyngier wrote:
> Each time a Group-enable bit gets flipped, the state of these bits
> needs to be forwarded to the hardware. This is a pretty heavy
> handed operation, requiring all vcpus to reload their GICv4
> configuration. It is thus implemented as a new request type.

[note to myself]
... and the status are forwarded to HW by programming VGrp{0,1}En
fields of GICR_VPENDBASER when vPEs are made resident next time.

> 
> Of course, we only support Group-1 for now...
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>


Thanks