From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1INa8P-0002jP-3u for qemu-devel@nongnu.org; Tue, 21 Aug 2007 16:15:29 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1INa8N-0002ik-AZ for qemu-devel@nongnu.org; Tue, 21 Aug 2007 16:15:28 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1INa8N-0002ig-65 for qemu-devel@nongnu.org; Tue, 21 Aug 2007 16:15:27 -0400 Received: from zero.voxel.net ([69.9.191.6]) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1INa8M-00054d-V7 for qemu-devel@nongnu.org; Tue, 21 Aug 2007 16:15:27 -0400 Subject: Re: [Qemu-devel] [PATCH 3/4] Add support for HPET periodic timer. From: Matthew Kent In-Reply-To: <68676e00708211240k7237bf21k131257dd28063d26@mail.gmail.com> References: <20070817231149.544849769@gmail.com> <20070817231406.493008599@gmail.com> <1187724245.2562.28.camel@fuego> <68676e00708211240k7237bf21k131257dd28063d26@mail.gmail.com> Content-Type: text/plain Date: Tue, 21 Aug 2007 13:15:22 -0700 Message-Id: <1187727322.2562.41.camel@fuego> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Luca Cc: kvm-devel@lists.sf.net, qemu-devel@nongnu.org On Tue, 2007-21-08 at 21:40 +0200, Luca wrote: > On 8/21/07, Matthew Kent wrote: > > On Sat, 2007-18-08 at 01:11 +0200, Luca Tettamanti wrote: > > > plain text document attachment (clock-hpet) > > > Linux operates the HPET timer in legacy replacement mode, which means that > > > the periodic interrupt of the CMOS RTC is not delivered (qemu won't be able > > > to use /dev/rtc). Add support for HPET (/dev/hpet) as a replacement for the > > > RTC; the periodic interrupt is delivered via SIGIO and is handled in the > > > same way as the RTC timer. > > > > > > Signed-off-by: Luca Tettamanti > > > > I must be missing something silly here.. should I be able to open more > > than one instance of qemu with -clock hpet? Because upon invoking a > > second instance of qemu HPET_IE_ON fails. > > It depends on your hardware. Theoretically it's possible, but I've yet > to see a motherboard with more than one periodic timer. Ah thank you, after re-reading the docs I think I better understand this. -- Matthew Kent http://magoazul.com