From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerhard Wiesinger Subject: Kernel mode VGAs? Date: Tue, 14 Feb 2012 08:12:25 +0100 (CET) Message-ID: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII To: qemu-devel@nongnu.org, kvm@vger.kernel.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org List-Id: 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/