[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Q77 IGD instantly crashes on xen-pciback bind.
On Nov 29, 1:09pm, Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= wrote: } Subject: Re: [Xen-devel] Q77 IGD instantly crashes on xen-pciback bind. Good morning Pasi, thanks for taking the time to follow up. > > > > So we are obviously working with qemu-dm-traditional and with the > > > > IGD/LVDS BIOS configuration issue fixed the adapater passthrough is > > > > working and Windows7 is coming up and detecting the IGD as a standard > > > > VGA display adapter. Additional invocations of the VM after the first > > > > one result in failed passthrough with a garbled display. > > > > > This is probably due to the current lack of slot/bus reset in > > > xen-pciback, Konrad has a preliminary kernel patch for xen-pciback > > > that does this. I have attached the patch, though it has some rough > > > edges in the design :-) > > > > > > I'm currently running with his 3.19 xen-pciback patches series + the > > > preliminary patch for slot/bus reset and rebooting a guest with > > > vga/pci passthrough now works. (i'm running with a radeon card, > > > passed through as a secondary card to the emulated qemu one, in a > > > linux guest using qemu-xen, so i can't help you with your other > > > questions and problems). > > > > Thanks for taking the time for respond and forward along the patch. > > > > I back ported the do_flr patch into the 3.14.x kernel and spent some > > time working with it. I thought it might be useful to others to > > document what we ran into. > > > > First of all the issue with the unsuccessful boot of Windows after the > > first invocation doesn't appear to have anything to do with resetting > > the card. This was fixed by installing the most recent version of the > > Intel HD drivers in the Windows guest. > > > > If IGD passthrough is done without the HD drivers Windows 7 appears to > > use its standard VGA driver which seems to be able to initialize and > > run the IGD device but does not appear to shutdown the device in a > > manner in which it can be re-started. After the first invocation of > > the guest is shutdown the screen goes to a solid color. Subsequent > > invocations result in the flashing multi-color screens which others > > have documented. > > > > With the HD drivers installed IGD passthrough works fine through > > multiple invocations of a guest with the stock xen-pciback in 3.14.x. > > We ran 40-50 repetitive Windows guest invocations and every one was > > completely deterministic. > It would be nice if you could let us know the exact Intel IGD > Windows driver version that worked well for you? It might be a good > reference for others aswell. I just fired up a pass-through session to check on this. The driver version and date are as follows: Driver Date: 09/26/2014 Driver Version: 10.18.10.29458 They were the most current version of the driver available on Intel's website as of a week ago. As soon as we sort out the details on whether or not we can get the IGD device re-started we will put a patch up on our FTP server with the changes needed to implement both ATI and IGD passthrough on 4.4.1 as a resource to the community. > Thanks, > > -- Pasi Have a good day. Greg }-- End of excerpt from Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= As always, Dr. G.W. Wettstein, Ph.D. Enjellic Systems Development, LLC. 4206 N. 19th Ave. Specializing in information infra-structure Fargo, ND 58102 development. PH: 701-281-1686 FAX: 701-281-3949 EMAIL: greg@xxxxxxxxxxxx ------------------------------------------------------------------------------ "In the future, company names will be a 32-character hex string." -- Bruce Schneier _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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