PCI passthrough resource remapping

["Ryan C. Underwood" <nemesis@icequake.net>]

I have a multifunction PCI device that I'd like to pass through to KVM.
In order to do that, I'm reading that the PCI memory region must be 4K-page
aligned and the PCI memory resources itself must also be exact multiples
of 4K pages.

I have added the following on my kernel command line:
reassign_resources reassigndev=08:09.0,08:09.1,08:09.2,08:09.3,08:09.4

But I don't know if it has any effect.  The resources are still not
sized in 4K pages.  Also, this seems to screw up the last device.

Am I doing the right thing.  I am on amd64 and using the latest qemu-kvm
release 0.12.1.2 with kernel 2.6.31.  It seems very hard to find
documentation on the kernel parameters related to pci-passthrough.


08:09.0 0c00: 1180:0832 (rev 05) (prog-if 10)
        Subsystem: 103c:30cd
        Flags: bus master, medium devsel, latency 32, IRQ 16
        Memory at f4400000 (32-bit, non-prefetchable) [size=2K]
        Capabilities: <access denied>
        Kernel driver in use: ohci1394
        Kernel modules: firewire-ohci, ohci1394

08:09.1 0805: 1180:0822 (rev 22)
        Subsystem: 103c:30cd
        Flags: bus master, medium devsel, latency 32, IRQ 18
        Memory at f4400800 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>
        Kernel driver in use: sdhci-pci
        Kernel modules: sdhci-pci

08:09.2 0880: 1180:0843 (rev 12)
        Subsystem: 103c:30cd
        Flags: bus master, medium devsel, latency 32, IRQ 10
        Memory at f4400c00 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>
        Kernel driver in use: ricoh-mmc
        Kernel modules: ricoh_mmc

08:09.3 0880: 1180:0592 (rev 12)
        Subsystem: 103c:30cd
        Flags: bus master, medium devsel, latency 32, IRQ 10
        Memory at f4401000 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>

08:09.4 0880: 1180:0852 (rev ff) (prog-if ff)
        !!! Unknown header type 7f


-- 
Ryan C. Underwood, <nemesis@icequake.net>