From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: VGA pass-through Date: Tue, 30 Jun 2009 09:51:19 +0300 Message-ID: <4A49B5E7.2010509@redhat.com> References: <9B4771B4D9FB73498B40311D4E7E8EE50EBCEFBF@atl-ms2.us.megatrends.com> <715D42877B251141A38726ABF5CABF2C0545A1FAD1@pdsmsx503.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "'Subash Kalbarga'" , "'kvm@vger.kernel.org'" To: "Han, Weidong" Return-path: Received: from mx2.redhat.com ([66.187.237.31]:36024 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752483AbZF3GvP (ORCPT ); Tue, 30 Jun 2009 02:51:15 -0400 In-Reply-To: <715D42877B251141A38726ABF5CABF2C0545A1FAD1@pdsmsx503.ccr.corp.intel.com> Sender: kvm-owner@vger.kernel.org List-ID: On 06/30/2009 09:16 AM, Han, Weidong wrote: > Subash Kalbarga wrote: > >> Hi >> >> I am using kvm-86 on 2.6.28 and I am able to pass through most of my >> PCI devices successfully. However, I do not see even the KVM BIOS >> output if I pass through my VGA adapter. I am doing -vga none, >> -nographic and -pcidevice host=xx:yy.z >> >> >> Should I expect to see the kvm BIOS output? Is VGA pass-through >> something that is expected to work? >> > > Currently VGA pass-through is not supported in KVM. It needs much work to support it. > > What does it need? Here's what I know of: - load the vga bios at 0xc0000 - implement whatever main bios interfaces the vga vios expects - pass through the vga I/O ports Anything else? -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.