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 [thread overview]
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)
next prev parent reply other threads:[~2021-04-17 8:59 UTC|newest]
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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).