From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40128) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YXlfP-0004FM-Vs for qemu-devel@nongnu.org; Tue, 17 Mar 2015 03:11:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YXlfK-00026c-QT for qemu-devel@nongnu.org; Tue, 17 Mar 2015 03:11:55 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:22451) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YXlfJ-00025g-Pn for qemu-devel@nongnu.org; Tue, 17 Mar 2015 03:11:50 -0400 Message-ID: <5507D3A2.4020502@huawei.com> Date: Tue, 17 Mar 2015 15:11:30 +0800 From: Gonglei MIME-Version: 1.0 References: <55057FE2.6090604@huawei.com> In-Reply-To: <55057FE2.6090604@huawei.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] IO port 0x61 is multiple used List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Weidong Huang , "qemu-devel@nongnu.org" Cc: peter.huangpeng@huawei.com, "kraxel@redhat.com" On 2015/3/15 20:49, Weidong Huang wrote: > Hi ALL: > > IO port 0x61 is used by pc speaker and NMI reason port. > > This is ambiguous. How to distinguish in QEMU? > > I see that NMI reason port is not realized in QEMU. > > But linux guest will access this port to determine what the NMI reason code means. > > It will access pc speaker's io port. Is this a bug? > Gerd, any thoughts? Thanks, -Gonglei