KVM Archive on lore.kernel.org
 help / color / Atom feed
From: Zenghui Yu <yuzenghui@huawei.com>
To: Marc Zyngier <maz@kernel.org>
Cc: <netdev@vger.kernel.org>, <yangbo.lu@nxp.com>,
	<john.stultz@linaro.org>, <tglx@linutronix.de>,
	<pbonzini@redhat.com>, <seanjc@google.com>,
	<richardcochran@gmail.com>, <Mark.Rutland@arm.com>,
	<will@kernel.org>, <suzuki.poulose@arm.com>,
	<Andre.Przywara@arm.com>, <steven.price@arm.com>,
	<lorenzo.pieralisi@arm.com>, <sudeep.holla@arm.com>,
	<justin.he@arm.com>, <kvm@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <kernel-team@android.com>,
	<kvmarm@lists.cs.columbia.edu>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v19 6/7] KVM: arm64: Add support for the KVM PTP service
Date: Sat, 17 Apr 2021 16:59:39 +0800
Message-ID: <5aadf0b4-b9e5-8521-db60-52a0f319cf28@huawei.com> (raw)
In-Reply-To: <20210330145430.996981-7-maz@kernel.org>

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.

> +
> +This hypercall uses the SMC32/HVC32 calling convention:
> +
> +ARM_SMCCC_HYP_KVM_PTP_FUNC_ID

ditto

> +    =============    ==========    ==========
> +    Function ID:     (uint32)      0x86000001
> +    Arguments:       (uint32)      KVM_PTP_VIRT_COUNTER(0)
> +                                   KVM_PTP_PHYS_COUNTER(1)

  reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-30 14:54 [PATCH v19 0/7] KVM: arm64: Add host/guest KVM-PTP support Marc Zyngier
2021-03-30 14:54 ` [PATCH v19 1/7] arm/arm64: Probe for the presence of KVM hypervisor Marc Zyngier
2021-04-17  9:49   ` Zenghui Yu
2021-03-30 14:54 ` [PATCH v19 2/7] KVM: arm64: Advertise KVM UID to guests via SMCCC Marc Zyngier
2021-03-30 14:54 ` [PATCH v19 3/7] ptp: Reorganize ptp_kvm.c to make it arch-independent Marc Zyngier
2021-04-07  9:28   ` Marc Zyngier
2021-04-07 15:13     ` Richard Cochran
2021-04-07 15:31       ` Marc Zyngier
2021-03-30 14:54 ` [PATCH v19 4/7] time: Add mechanism to recognize clocksource in time_get_snapshot Marc Zyngier
2021-04-17  9:27   ` Zenghui Yu
2021-03-30 14:54 ` [PATCH v19 5/7] clocksource: Add clocksource id for arm arch counter Marc Zyngier
2021-03-30 14:54 ` [PATCH v19 6/7] KVM: arm64: Add support for the KVM PTP service Marc Zyngier
2021-04-17  8:59   ` Zenghui Yu [this message]
2021-04-17  9:10     ` Marc Zyngier
2021-04-17 10:24       ` Zenghui Yu
2021-03-30 14:54 ` [PATCH v19 7/7] ptp: arm/arm64: Enable ptp_kvm for arm/arm64 Marc Zyngier
2021-04-17  8:42   ` Zenghui Yu
2021-04-17  9:05     ` Marc Zyngier
2021-05-11  9:07   ` Geert Uytterhoeven
2021-05-11  9:13     ` Marc Zyngier
2021-05-26  7:52       ` Geert Uytterhoeven
2021-05-26  8:01         ` Marc Zyngier
2021-05-26  8:18           ` Geert Uytterhoeven
2021-05-26  8:32             ` Marc Zyngier
2021-05-26  8:50               ` Geert Uytterhoeven

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=5aadf0b4-b9e5-8521-db60-52a0f319cf28@huawei.com \
    --to=yuzenghui@huawei.com \
    --cc=Andre.Przywara@arm.com \
    --cc=Mark.Rutland@arm.com \
    --cc=john.stultz@linaro.org \
    --cc=justin.he@arm.com \
    --cc=kernel-team@android.com \
    --cc=kvm@vger.kernel.org \
    --cc=kvmarm@lists.cs.columbia.edu \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=maz@kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=pbonzini@redhat.com \
    --cc=richardcochran@gmail.com \
    --cc=seanjc@google.com \
    --cc=steven.price@arm.com \
    --cc=sudeep.holla@arm.com \
    --cc=suzuki.poulose@arm.com \
    --cc=tglx@linutronix.de \
    --cc=will@kernel.org \
    --cc=yangbo.lu@nxp.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git