From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Xen 4.4 development update: Is PVH a blocker? Date: Tue, 17 Dec 2013 16:35:38 -0500 Message-ID: <20131217213538.GA32553@phenom.dumpdata.com> References: <20131213193926.GE28412@phenom.dumpdata.com> <10210502196.20131213215514@eikelenboom.it> <20131216150906.GA14038@phenom.dumpdata.com> <16110253000.20131216182420@eikelenboom.it> <20131216174635.GA23286@phenom.dumpdata.com> <1195791410.20131216185916@eikelenboom.it> <20131216193403.GB25548@phenom.dumpdata.com> <402966494.20131216204644@eikelenboom.it> <20131217143545.GA4433@phenom.dumpdata.com> <1588827408.20131217160314@eikelenboom.it> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1588827408.20131217160314@eikelenboom.it> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Sander Eikelenboom Cc: George Dunlap , "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org On Tue, Dec 17, 2013 at 04:03:14PM +0100, Sander Eikelenboom wrote: > > Tuesday, December 17, 2013, 3:35:45 PM, you wrote: > > >> > rm -Rf tools/firmware/seabios-dir* tools/qemu-xen* > >> > rebuilt and had the same issue :-( > >> > >> Hmm so taking it forward doesn't cut it .. going back is probably going to be searching for a needle in a haystack. > >> Finding many incomptabilities. I tried it with vga passthrough to find back a working config i knew i once had .. but to no avail :-( > > > Yikes. Do you get a similar error message in QEMU? > > Nope my problem (at present) is with the rom bar, that is special cased around everywhere (hvmloader, seabios, qemu, guest kernel). > And it appears all fine, but in fact in the guest it isn't backed by the actual rom data (neither by a copy, neither by passing it through). > > Already tried by letting hvmloader load it as a optionrom, but that didn't cut it. > > When dumping the rom of the devices passed through in the guest, > i was seeing al kinds of romdata from the emulated devices at the address given to the passed through devive, > but not the romdata from the passedthrough device. > > And that was when i stumbled upon the whole xen_platform_pci problem, > as i was trying to switch of as many emulated devices as possible (in the hope it was some interference between those. > > After that tried KVM .. to see if it is in any way feasible and possible with my system (iommu + gfx card), > that resulted in almost instant succes .. so yes it should be possible ... Yes. I would like it to work too. That is what I am trying to get working. And neatly enough I can reproduce the problem you are seeing on my system. I have some ideas of why it is happening but no concrete patches. Will CC when I am ready.