Jordan Hargrave writes:
> This is the first patch for adding PCI passthrough support to VMD. > I am splitting up the necessary changes into smaller patches. > > This code fixes the pci device union for accessing PCI config space >= 0x40 > pcidump -xxx would return garbage data due to union overlap I can confirm at least in an OpenBSD guest that pcidump is returning something different for the virtio devices: 24,26c24,26 < 0x0040: 00000001 00000000 00000000 00000000 < 0x0050: 00000010 00000000 00000000 00000000 < 0x0060: 00000000 20000000 ff4188fd 0000000b --- > 0x0040: 00000000 00000000 00000000 00000000 > 0x0050: 00000000 00000000 00000000 00000000 > 0x0060: 00000000 00000000 00000000 00000000 41,43c41,43 < 0x0040: 00000001 00000000 00000000 00000000 < 0x0050: 00000010 00000000 00000000 00000000 < 0x0060: 00000000 10000000 ff418911 0000000b --- > 0x0040: 00000000 00000000 00000000 00000000 > 0x0050: 00000000 00000000 00000000 00000000 > 0x0060: 00000000 00000000 00000000 00000000 46c46 < 0x0090: 00000000 00000000 01d25048 0000000c --- > 0x0090: 00000000 00000000 00000000 00000000 58,60c58,60 < 0x0040: 00000001 00000000 00000000 00000000 < 0x0050: 00000010 00000000 00000000 00000000 < 0x0060: 00000000 d0000000 ff418909 0000000b --- > 0x0040: 00000000 00000000 00000000 00000000 > 0x0050: 00000000 00000000 00000000 00000000 > 0x0060: 00000000 00000000 00000000 00000000 63c63 < 0x0090: 00000000 00000000 019adaf5 0000000c --- > 0x0090: 00000000 00000000 00000000 00000000 75,77c75,77 < 0x0040: 00000001 00000000 00000000 00000000 < 0x0050: 00000010 00000000 00000000 00000000 < 0x0060: 00000000 20000000 ff418924 0000000b --- > 0x0040: 00000000 00000000 00000000 00000000 > 0x0050: 00000000 00000000 00000000 00000000 > 0x0060: 00000000 00000000 00000000 00000000 I'll apply it to my other system where I keep a mix of OpenBSD and Linux guests running. > > pci_add_bar now requires specifying the BAR area size to allocate > > Extra cookie argument added to pci_add_device > PCI isn't something I grok, so hopefully someone else can take a look at this to see if it makes sense. -Dave Voutila
