On Sun, Jul 8, 2012 at 10:39 PM, sumit chaudhary <flyingbee.linux@xxxxxxxxx> wrote: > Hi Bjorn, > > Device is working as expected but problem is that I want to test this > device with real 64 bit addresses that lies above 4GB. > is there a way to allocate addresses above 4GB range ? > If I try to allocate BAR size more than 2GB i.e. to push allocated > address above 4GB, I increase resource size asked from OS > than host system stopped booting and hangs. > I also tried enumerating PCI subsystem using kernel command line > option pci_assign = buses, but same problem persist. > I also tried Increasing RAM of my system to 4 GB but still address > allocation is in 32 bit range. you can check my for-pci-res_alloc branch and attached patch. git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-res-alloc and you need to boot with pci=pref_bar. it will clear pref_bar and assign mem64 bar to above at first. Thanks Yinghai
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pci_assign_pref.patch
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