From: Jianyong Wu <Jianyong.Wu@arm.com>
To: Marc Zyngier <maz@kernel.org>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"yangbo.lu@nxp.com" <yangbo.lu@nxp.com>,
"john.stultz@linaro.org" <john.stultz@linaro.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"sean.j.christopherson@intel.com"
<sean.j.christopherson@intel.com>,
"richardcochran@gmail.com" <richardcochran@gmail.com>,
Mark Rutland <Mark.Rutland@arm.com>,
"will@kernel.org" <will@kernel.org>,
Suzuki Poulose <Suzuki.Poulose@arm.com>,
Steven Price <Steven.Price@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Steve Capper <Steve.Capper@arm.com>,
Justin He <Justin.He@arm.com>, nd <nd@arm.com>
Subject: RE: [PATCH v14 07/10] arm64/kvm: Add hypercall service for kvm ptp.
Date: Mon, 7 Sep 2020 08:13:11 +0000 [thread overview]
Message-ID: <HE1PR0802MB25553E713006580825C367ACF4280@HE1PR0802MB2555.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <87363wmqmt.wl-maz@kernel.org>
Hi Marc,
> -----Original Message-----
> From: Marc Zyngier <maz@kernel.org>
> Sent: Saturday, September 5, 2020 7:04 PM
> To: Jianyong Wu <Jianyong.Wu@arm.com>
> Cc: netdev@vger.kernel.org; yangbo.lu@nxp.com; john.stultz@linaro.org;
> tglx@linutronix.de; pbonzini@redhat.com; sean.j.christopherson@intel.com;
> richardcochran@gmail.com; Mark Rutland <Mark.Rutland@arm.com>;
> will@kernel.org; Suzuki Poulose <Suzuki.Poulose@arm.com>; Steven Price
> <Steven.Price@arm.com>; linux-kernel@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; kvmarm@lists.cs.columbia.edu;
> kvm@vger.kernel.org; Steve Capper <Steve.Capper@arm.com>; Justin He
> <Justin.He@arm.com>; nd <nd@arm.com>
> Subject: Re: [PATCH v14 07/10] arm64/kvm: Add hypercall service for kvm
> ptp.
>
> On Fri, 04 Sep 2020 10:27:41 +0100,
> Jianyong Wu <jianyong.wu@arm.com> wrote:
> >
> > ptp_kvm will get this service through smccc call.
> > The service offers wall time and counter cycle of host for guest.
> > caller must explicitly determines which cycle of virtual counter or
> > physical counter to return if it needs counter cycle.
> >
> > Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
> > ---
> > arch/arm64/kvm/Kconfig | 6 +++++
> > arch/arm64/kvm/arch_timer.c | 2 +-
> > arch/arm64/kvm/hypercalls.c | 49
> > ++++++++++++++++++++++++++++++++++++
> > include/kvm/arm_arch_timer.h | 1 +
> > include/linux/arm-smccc.h | 16 ++++++++++++
> > 5 files changed, 73 insertions(+), 1 deletion(-)
> >
>
> [...]
>
> On top of what I said yesterday:
>
> > index 32ba6fbc3814..eb85f6701845 100644
> > --- a/arch/arm64/kvm/arch_timer.c
> > +++ b/arch/arm64/kvm/arch_timer.c
> > @@ -81,7 +81,7 @@ u64 timer_get_cval(struct arch_timer_context *ctxt)
> > }
> > }
> >
> > -static u64 timer_get_offset(struct arch_timer_context *ctxt)
> > +u64 timer_get_offset(struct arch_timer_context *ctxt)
> > {
> > struct kvm_vcpu *vcpu = ctxt->vcpu;
> >
>
> Why has this become global? I can't see a reason why we would want to
> expose this purely KVM internal helper.
>
Sorry to have forgotten remove this change.
Thanks
Jianyong
> M.
>
> --
> Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2020-09-07 8:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 9:27 [PATCH v14 00/10] Enable ptp_kvm for arm64 Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 01/10] arm64: Probe for the presence of KVM hypervisor services during boot Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 02/10] arm/arm64: KVM: Advertise KVM UID to guests via SMCCC Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 03/10] smccc: Export smccc conduit get helper Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 04/10] ptp: Reorganize ptp_kvm module to make it arch-independent Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 05/10] time: Add mechanism to recognize clocksource in time_get_snapshot Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 06/10] clocksource: Add clocksource id for arm arch counter Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 07/10] arm64/kvm: Add hypercall service for kvm ptp Jianyong Wu
2020-09-04 16:15 ` Marc Zyngier
2020-09-07 8:10 ` Jianyong Wu
2020-09-05 11:04 ` Marc Zyngier
2020-09-07 8:13 ` Jianyong Wu [this message]
2020-09-04 9:27 ` [PATCH v14 08/10] ptp: arm64: Enable ptp_kvm for arm64 Jianyong Wu
2020-09-05 11:01 ` Marc Zyngier
2020-09-06 10:00 ` Marc Zyngier
2020-09-07 8:40 ` Jianyong Wu
2020-09-07 8:54 ` Marc Zyngier
2020-09-07 9:28 ` Jianyong Wu
2020-09-07 9:47 ` Marc Zyngier
2020-09-07 10:11 ` Jianyong Wu
2020-09-05 11:33 ` Marc Zyngier
2020-09-07 8:51 ` Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 09/10] doc: add ptp_kvm introduction for arm64 support Jianyong Wu
2020-09-04 16:18 ` Marc Zyngier
2020-09-07 7:55 ` Jianyong Wu
2020-09-04 9:27 ` [PATCH v14 10/10] arm64: Add kvm capability check extension for ptp_kvm Jianyong Wu
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