From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:45856) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RxCal-0005ic-LM for qemu-devel@nongnu.org; Tue, 14 Feb 2012 02:14:24 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RxCak-0005bR-EV for qemu-devel@nongnu.org; Tue, 14 Feb 2012 02:14:23 -0500 Received: from chello084112167138.7.11.vie.surfer.at ([84.112.167.138]:45731 helo=wiesinger.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RxCak-0005CA-3z for qemu-devel@nongnu.org; Tue, 14 Feb 2012 02:14:22 -0500 Date: Tue, 14 Feb 2012 08:12:25 +0100 (CET) From: Gerhard Wiesinger Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Subject: [Qemu-devel] Kernel mode VGAs? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, kvm@vger.kernel.org Hello, Current QEMU-KVM VGA implementation have the following problem with legacy OS (e.g. DOS with INT10h calls): Performance is low on accessing A000:0 page and doing bank switching at the 64k page. Would a kernel mode VGA solve these problems? How complicated is it? Is it possible to have only some parts in kernel mode? Any further ideas or suggestions? Thnx. Ciao, Gerhard -- http://www.wiesinger.com/