On Thu, Sep 25, 2008 at 07:36:24PM -0700, Ryan Holmqvist wrote: > I have tried many versions of Linux kernels and many versions of PCIUTILS and have never been able to read extended PCIe space (ie regs >= 0x100). What am I doing wrong? Has anyone else been able to do this? Look in dmesg, does it say anything about MMCONFIG? eg my laptop says: [ 0.175714] PCI: MCFG configuration 0: base f8000000 segment 0 buses 0 - 63 [ 0.175900] PCI: MCFG area at f8000000 reserved in E820 [ 0.176011] PCI: Using MMCONFIG for extended config space [ 0.176011] PCI: Using configuration type 1 for base access The messages have changed slightly recently, for example one desktop running 2.6.27-rc5-00361-g82a28c7 reports: [ 0.426121] PCI: MCFG configuration 0: base f0000000 segment 0 buses 0 - 127 [ 0.426170] PCI: MCFG area at f0000000 reserved in E820 [ 0.430128] PCI: Using MMCONFIG at f0000000 - f7ffffff [ 0.430172] PCI: Using configuration type 1 for base access and another running 2.6.25-rc7-00192-g8147293 reports: PCI: Found Intel Corporation 945G/GZ/P/PL Express Memory Controller Hub with MMCONFIG support. PCI: Using MMCONFIG at e0000000 - efffffff PCI: Using configuration type 1 extended config space works on all three of these machines. I'm pretty sure I have a machine where it's disabled, but I can't find it right now ;-) -- 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
