linux-kernel - Re: [PATCH v2 08/36] irqchip/gic-v3: Detect GICv4.1 supporting RVPEID

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Message-ID: <5ab1a656-f92d-a32b-8c6a-09397eac9067@huawei.com>
Date:   Thu, 31 Oct 2019 19:34:32 +0800
From:   Zenghui Yu <yuzenghui@...wei.com>
To:     Marc Zyngier <maz@...nel.org>, <kvmarm@...ts.cs.columbia.edu>,
        <linux-kernel@...r.kernel.org>
CC:     Eric Auger <eric.auger@...hat.com>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        "Andrew Murray" <Andrew.Murray@....com>,
        Jayachandran C <jnair@...vell.com>,
        "Robert Richter" <rrichter@...vell.com>
Subject: Re: [PATCH v2 08/36] irqchip/gic-v3: Detect GICv4.1 supporting RVPEID

Hi Marc,

On 2019/10/27 22:42, Marc Zyngier wrote:
> GICv4.1 supports the RVPEID ("Residency per vPE ID"), which allows for
> a much efficient way of making virtual CPUs resident (to allow direct
> injection of interrupts).
> 
> The functionnality needs to be discovered on each and every redistributor
> in the system, and disabled if the settings are inconsistent.
> 
> Signed-off-by: Marc Zyngier <maz@...nel.org>

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