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Subject: Re: [PATCH v19 6/7] KVM: arm64: Add support for the KVM PTP service
To:     Marc Zyngier <maz@kernel.org>
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References: <20210330145430.996981-1-maz@kernel.org>
 <20210330145430.996981-7-maz@kernel.org>
 <5aadf0b4-b9e5-8521-db60-52a0f319cf28@huawei.com>
 <87v98ls2co.wl-maz@kernel.org>
From:   Zenghui Yu <yuzenghui@huawei.com>
Message-ID: <e4130244-10a6-3251-227b-6f99c3c5899b@huawei.com>
Date:   Sat, 17 Apr 2021 18:24:49 +0800
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On 2021/4/17 17:10, Marc Zyngier wrote:
> On Sat, 17 Apr 2021 09:59:39 +0100,
> Zenghui Yu <yuzenghui@huawei.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?

Okay. I'll have a patch for that.


Zenghui