From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sipos Ferenc Subject: bt878 based dvr card vs. pci pass-thru Date: Sat, 16 Dec 2006 22:05:10 +0100 Message-ID: <1166303110.4665.15.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-users-bounces@lists.xensource.com Errors-To: xen-users-bounces@lists.xensource.com To: xen-devel@lists.xensource.com Cc: xen-users@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hi All, I'm trying to set up a surveillance system in a domU using pciback/pcifront to pass through the 4x bt878 chips, however this what I get in the kernel logs: """ Dec 15 16:28:18 hive kernel: pciback 0000:07:0c.0: Driver tried to write to a read-only configuration space field at offset 0x50, size 2. This may be harmless, but if you have problems with your device: Dec 15 16:28:18 hive kernel: 1) see permissive attribute in sysfs Dec 15 16:28:18 hive kernel: 2) report problems to the xen-devel mailing list along with details of your device obtained from lspci. Dec 15 16:28:18 hive kernel: PCI: Enabling device 0000:07:0c.0 (0000 -> 0002) Dec 15 16:28:18 hive kernel: ACPI: PCI Interrupt 0000:07:0c.0[A] -> GSI 16 (level, low) -> IRQ 16 """ (Such message for every bttv chip.) According to option 1) above here is what's in my xend-pci-permissive.sxp file: """ (unconstrained_dev_ids ('0000:07:0c.0' '0000:07:0c.1' '0000:07:0d.0' '0000:07:0d.1' '0000:07:0e.0' '0000:07:0e.1' '0000:07:0f.0' '0000:07:0f.1') ) """ lspci says (relevant part only): """ 0000:07:0c.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) 0000:07:0c.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11) 0000:07:0d.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) 0000:07:0d.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11) 0000:07:0e.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) 0000:07:0e.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11) 0000:07:0f.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) 0000:07:0f.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11) """ For some reason my system froze the other day (dom0) and I'm not sure if this has anything to do with that as I was not able to gather any information on what might have caused the freeze. If anyone has any thoughts on how to make those warnings go away or has experience with similar setup, please put me on the right track. Thanks, Frank PS: Devguys, please note I'm not subscribed on the -devel list, so either reply to me directly or the -users list which is also copied on this mail.