linux-kernel - Re: [PATCH v5 5/6] ptp: arm64: Enable ptp

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Message-ID: <da62c327-9402-9a5c-d694-c1a4378822e0@redhat.com>
Date:   Tue, 15 Oct 2019 18:39:28 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Jianyong Wu <jianyong.wu@....com>, netdev@...r.kernel.org,
        yangbo.lu@....com, john.stultz@...aro.org, tglx@...utronix.de,
        sean.j.christopherson@...el.com, maz@...nel.org,
        richardcochran@...il.com, Mark.Rutland@....com, will@...nel.org,
        suzuki.poulose@....com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        Steve.Capper@....com, Kaly.Xin@....com, justin.he@....com,
        nd@....com
Subject: Re: [PATCH v5 5/6] ptp: arm64: Enable ptp_kvm for arm64

On 15/10/19 12:48, Jianyong Wu wrote:
> +int kvm_arch_ptp_get_clock_generic(struct timespec64 *ts,
> +				   struct arm_smccc_res *hvc_res)
> +{
> +	u64 ns;
> +	ktime_t ktime_overall;
> +
> +	arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID,
> +				  hvc_res);
> +	if ((long)(hvc_res->a0) < 0)
> +		return -EOPNOTSUPP;
> +
> +	ktime_overall = hvc_res->a0 << 32 | hvc_res->a1;
> +	*ts = ktime_to_timespec64(ktime_overall);
> +
> +	return 0;
> +}
> +

This seems wrong, who uses kvm_arch_ptp_get_clock_fn?

Paolo