Am 31.10.2010 16:05, Jan Kiszka wrote: > Still not working here are ehci, ath9k and e1000e when passed through. > They receive IRQs, but somehow the Linux guest drivers are unhappy about > the device states (the e1000e detects "Hardware Unit Hang" e.g.). This > is independent of my patches. Anyone any ideas? Improper configurations > of the BIOS? I stumbled over this in the kernel log: > > DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics > Argh, no one told me that there is CONFIG_DMAR_DEFAULT_ON and that you have to pass "intel_iommu=on" if that config switch is off like here. Moreover, I somehow assumed "iommu=0" on the command line means "use IOMMU with index 0" (don't ask me why). Usability deserves some patches - later. So it's starting to work, already accessed some devices (ath9k did a successful scan), but now it's crashing in intel_iommu_attach_device. Looks like use after release. Sigh. Jan
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