From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50520) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UP8mK-0001vy-12 for qemu-devel@nongnu.org; Mon, 08 Apr 2013 05:54:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UP8mD-00045Z-Lu for qemu-devel@nongnu.org; Mon, 08 Apr 2013 05:54:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57345) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UP8mD-00042Y-Dw for qemu-devel@nongnu.org; Mon, 08 Apr 2013 05:54:13 -0400 Message-ID: <516293A5.7030900@redhat.com> Date: Mon, 08 Apr 2013 11:53:41 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1365136091-26148-1-git-send-email-lig.fnst@cn.fujitsu.com> <1365136091-26148-4-git-send-email-lig.fnst@cn.fujitsu.com> <515EBA2A.1090005@redhat.com> <1365380334.5674.5.camel@liguang.fnst.cn.fujitsu.com> In-Reply-To: <1365380334.5674.5.camel@liguang.fnst.cn.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH][RFC v2 3/7] vl: create power chip device List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: li guang Cc: qemu-devel@nongnu.org, peter.maydell@linaro.org, aliguori@us.ibm.com, afaerber@suse.de, stefanha@gmail.com Il 08/04/2013 02:18, li guang ha scritto: > In short, the purpose is to implement a power control process > just like real world(hardware platform), > a power chip(controller) connect power signals to other devices, > and devices can do power (on, off, ...) controlled by power > chip(controller). > Is this reasonable? It may be reasonable, but it will be board-dependent. The meaning of "power on/power off" varies wildly depending on the kind of device, the platform, etc. Similarly, "reset" is very different from a power cycle. Are you trying to implement D-states? Paolo