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Subject: Re: [RFC PATCH v4 3/5] psci: Add hvc call service for ptp_kvm.
To:     Jianyong Wu <jianyong.wu@arm.com>, netdev@vger.kernel.org,
        yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de,
        pbonzini@redhat.com, sean.j.christopherson@intel.com,
        maz@kernel.org, richardcochran@gmail.com, Mark.Rutland@arm.com,
        Will.Deacon@arm.com, suzuki.poulose@arm.com
Cc:     linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
        Steve.Capper@arm.com, Kaly.Xin@arm.com, justin.he@arm.com,
        nd@arm.com
References: <20190926114212.5322-1-jianyong.wu@arm.com>
 <20190926114212.5322-4-jianyong.wu@arm.com>
From:   Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Message-ID: <3586ca5b-7abb-12b2-2368-cbc09fe3777f@cogentembedded.com>
Date:   Fri, 27 Sep 2019 12:20:25 +0300
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Hello!

On 26.09.2019 14:42, Jianyong Wu wrote:

> This patch is the base of ptp_kvm for arm64.
> ptp_kvm modules will call hvc to get this service.
> The service offers real time and counter cycle of host for guest.
> 
> Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
> ---
>   include/linux/arm-smccc.h | 12 ++++++++++++
>   virt/kvm/arm/psci.c       | 18 ++++++++++++++++++
>   2 files changed, 30 insertions(+)

[...]
> diff --git a/virt/kvm/arm/psci.c b/virt/kvm/arm/psci.c
> index 0debf49bf259..3f30fc42a5ca 100644
> --- a/virt/kvm/arm/psci.c
> +++ b/virt/kvm/arm/psci.c
[...]
> @@ -431,6 +433,22 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu)
>   	case ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID:
>   		val[0] = BIT(ARM_SMCCC_KVM_FUNC_FEATURES);
>   		break;
> +	/*
> +	 * This will used for virtual ptp kvm clock. three
                     ^ be?                            ^ T

[...]

MBR, Sergei