On Fri, Jun 26, 2009 at 12:04:12PM -0700, Keith Mannthey wrote: > Hello All, > I am working with Intel X5500 series processors. The documentation > for these processors can be found here: > http://www.intel.com/p/en_US/products/server/processor/xeon5000/technical-documents (for anyone else who's curious about this, you only need the smaller 'volume 2', not the larger 'volume 1'). > Theses devices are "hidden" from Linux at is stands now, the kernel does > not detect them. All standard methods of using the device fail, any > pci_XXX calls works as the devices are not in the list of devices in the > kernel. For example lspci (which uses sysfs) does not show the > devices. > There are 2 real questions I have: > > 1. Why are these devices hidden? I understand some of the other icore7 > cpus devices behave as I would expect. You'd have to ask your BIOS people. Linux doesn't blindly scan every single PCI address; it would take far too long. Instead, we rely on the BIOS to tell us about PCI busses that exist, and we scan those. > 2. If the devices can not be made to be used as a normal pci device > what is the best way to access them? I doubt you can access them other than through PCI config space. I suspect we could add functionality for Linux to notice that we're running on a Nehalem machine, and then to scan these PCI devices. But it'd be better to find out from your BIOS people why they don't report these devices. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
