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From: "Dong, Eddie" <eddie.dong@intel.com>
To: "Glauber de Oliveira Costa" <gcosta@redhat.com>,
	<linux-kernel@vger.kernel.org>
Cc: <jeremy@goop.org>, <hollisb@us.ibm.com>,
	<kvm-devel@lists.sourceforge.net>, <avi@qumranet.com>
Subject: RE: [kvm-devel] [PATCH 2/3] kvmclock - the host part.
Date: Tue, 13 Nov 2007 13:00:10 +0800	[thread overview]
Message-ID: <10EA09EFD8728347A513008B6B0DA77A025DF8A2@pdsmsx411.ccr.corp.intel.com> (raw)
In-Reply-To: <11945615751747-git-send-email-gcosta@redhat.com>


> +static void kvm_write_guest_time(struct kvm_vcpu *vcpu) +{
> +	struct timespec ts;
> +	int r;
> +
> +	if (!vcpu->clock_gpa)
> +		return;
> +
> +	/* Updates version to the next odd number, indicating
> we're writing */
> +	vcpu->hv_clock.version++;
> +	kvm_write_guest(vcpu->kvm, vcpu->clock_gpa,
> &vcpu->hv_clock, PAGE_SIZE);
> +
> +	kvm_get_msr(vcpu, MSR_IA32_TIME_STAMP_COUNTER,
> +			  &vcpu->hv_clock.last_tsc);
> +
> +	ktime_get_ts(&ts);

Do we need to disable preemption here?

> +	vcpu->hv_clock.now_ns = ts.tv_nsec + (NSEC_PER_SEC *
> (u64)ts.tv_sec); +	vcpu->hv_clock.wc_sec = get_seconds();
> +	vcpu->hv_clock.version++;
> +	kvm_write_guest(vcpu->kvm, vcpu->clock_gpa,
> &vcpu->hv_clock, PAGE_SIZE);
> +}
> +
thx,eddie

  parent reply	other threads:[~2007-11-13  5:01 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-08 22:39 [PATCH 0/3] Kvm clocksource, new spin Glauber de Oliveira Costa
2007-11-08 22:39 ` [PATCH 1/3] include files for kvmclock Glauber de Oliveira Costa
2007-11-08 22:39   ` [PATCH 2/3] kvmclock - the host part Glauber de Oliveira Costa
2007-11-08 22:39     ` [PATCH 3/3] kvmclock implementation, the guest part Glauber de Oliveira Costa
2007-11-11 10:17     ` [PATCH 2/3] kvmclock - the host part Avi Kivity
2007-11-13 11:28       ` Glauber de Oliveira Costa
2007-11-13 14:44         ` Avi Kivity
2007-11-13  5:00     ` Dong, Eddie [this message]
2007-11-13 11:54       ` [kvm-devel] " Glauber de Oliveira Costa
2007-11-13 12:08         ` Izik Eidus
2007-11-13 14:47         ` Avi Kivity
2007-11-13 15:23           ` Dong, Eddie
2007-11-13 16:12             ` Avi Kivity
2007-11-14  0:41               ` Dong, Eddie
2007-11-09  8:37   ` [PATCH 1/3] include files for kvmclock Gerd Hoffmann
2007-11-11  9:15     ` Avi Kivity

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