linux-kernel - Re: [PATCH v5 23/23] KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs

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Message-ID: <e1a1e537-9f8e-5cfb-0132-f796e8bf06c9@huawei.com>
Date:   Fri, 20 Mar 2020 12:38:22 +0800
From:   Zenghui Yu <yuzenghui@...wei.com>
To:     Marc Zyngier <maz@...nel.org>, Auger Eric <eric.auger@...hat.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <kvmarm@...ts.cs.columbia.edu>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jason Cooper <jason@...edaemon.net>,
        "Robert Richter" <rrichter@...vell.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "James Morse" <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>
Subject: Re: [PATCH v5 23/23] KVM: arm64: GICv4.1: Expose HW-based SGIs in
 debugfs

Hi Marc,

On 2020/3/19 23:21, Marc Zyngier wrote:
> With GICv4.1, you can introspect the HW state for SGIs. You can also
> look at the vLPI state by peeking at the virtual pending table, but
> you'd need to unmap the VPE first,

Out of curiosity, could you please point me to the "unmap the VPE"
requirement in the v4.1 spec? I'd like to have a look.


Thanks!
Zenghui