From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: [PATCH] tsc: use kvmclock for calibration Date: Mon, 13 Aug 2012 13:46:11 +0300 Message-ID: <20120813104611.GW3341@redhat.com> References: <1344513463-7329-1-git-send-email-kraxel@redhat.com> <5023B2C4.90302@redhat.com> <5023C1D2.5090103@redhat.com> <5023C2BE.5070702@redhat.com> <20120809190913.GG20889@amt.cnet> <5024C1F3.80103@redhat.com> <20120810212605.GA32628@amt.cnet> <5028D8D7.7090407@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Marcelo Tosatti , Avi Kivity , seabios@seabios.org, kvm@vger.kernel.org To: Gerd Hoffmann Return-path: Received: from mx1.redhat.com ([209.132.183.28]:47191 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751104Ab2HMKqZ (ORCPT ); Mon, 13 Aug 2012 06:46:25 -0400 Content-Disposition: inline In-Reply-To: <5028D8D7.7090407@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Mon, Aug 13, 2012 at 12:37:11PM +0200, Gerd Hoffmann wrote: > Hi, > > > Isnt pmtimer ioport usable? 14MHz. > > Can give it a try. 14 MHz looks wrong though, apci.h says: > > /* PM Timer ticks per second (HZ) */ > #define PM_TIMER_FREQUENCY 3579545 > > Is this fixed? Or hardware specific? > 3.579545 MHz clock required by ACPI spec. -- Gleb.