From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LmWPX-0002Ar-KG for qemu-devel@nongnu.org; Wed, 25 Mar 2009 12:57:03 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LmWPS-0002AA-Bw for qemu-devel@nongnu.org; Wed, 25 Mar 2009 12:57:02 -0400 Received: from [199.232.76.173] (port=33299 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LmWPS-0002A7-6R for qemu-devel@nongnu.org; Wed, 25 Mar 2009 12:56:58 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:32752) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LmWPR-0006XV-J8 for qemu-devel@nongnu.org; Wed, 25 Mar 2009 12:56:57 -0400 Received: from [10.80.225.184] ([10.80.225.184]) by smtp01.ad.xensource.com (8.13.1/8.13.1) with ESMTP id n2PGus7G030075 for ; Wed, 25 Mar 2009 09:56:55 -0700 Message-ID: <49CA60BA.5060704@eu.citrix.com> Date: Wed, 25 Mar 2009 16:50:02 +0000 From: Stefano Stabellini MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH] honor IDE_DMA_BUF_SECTORS References: <49CA3591.1010309@eu.citrix.com> <49CA4C3D.1070705@redhat.com> <49CA59AE.8060605@eu.citrix.com> <49CA5F9F.5040203@redhat.com> In-Reply-To: <49CA5F9F.5040203@redhat.com> Content-Type: text/plain; charset=UTF-8 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: "qemu-devel@nongnu.org" Avi Kivity wrote: > I think that's for pio, or maybe older DMA? Certainly you wouldn't > expect to be limited to 16 sectors DMA. Thanks for clarifying. > Anyway I think IDE_DMA_BUF_SECTORS was a qemu limitation and did not > model real hardware behaviour. > Therefore I must assume that we expect qemu to be able to handle any kind of dma request coming from the guest, which at the moment is limited to 64K sectors, am I right?