netdev - Re: [PATCH v19 6/7] KVM: arm64: Add support for the KVM PTP service

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Message-ID: <87v98ls2co.wl-maz@kernel.org>
Date:   Sat, 17 Apr 2021 10:10:47 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Zenghui Yu <yuzenghui@...wei.com>
Cc:     <netdev@...r.kernel.org>, <yangbo.lu@....com>,
        <john.stultz@...aro.org>, <tglx@...utronix.de>,
        <pbonzini@...hat.com>, <seanjc@...gle.com>,
        <richardcochran@...il.com>, <Mark.Rutland@....com>,
        <will@...nel.org>, <suzuki.poulose@....com>,
        <Andre.Przywara@....com>, <steven.price@....com>,
        <lorenzo.pieralisi@....com>, <sudeep.holla@....com>,
        <justin.he@....com>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel-team@...roid.com>,
        <kvmarm@...ts.cs.columbia.edu>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v19 6/7] KVM: arm64: Add support for the KVM PTP service

On Sat, 17 Apr 2021 09:59:39 +0100,
Zenghui Yu <yuzenghui@...wei.com> wrote:
> 
> On 2021/3/30 22:54, Marc Zyngier wrote:
> > +PTP_KVM support for arm/arm64
> > +=============================
> > +
> > +PTP_KVM is used for high precision time sync between host and guests.
> > +It relies on transferring the wall clock and counter value from the
> > +host to the guest using a KVM-specific hypercall.
> > +
> > +* ARM_SMCCC_HYP_KVM_PTP_FUNC_ID: 0x86000001
> 
> Per include/linux/arm-smccc.h, this should be
> ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID.

Well spotted. Care to send a patch on top of my kvm-arm64/ptp branch?

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.