On Thu, Jun 02, 2016 at 05:46:10PM -0700, Roland Dreier wrote: > From: Roland Dreier <[email protected]> > > On a system with an Intel PCIe port configured as an NTB device, iommu > initialization fails with > > DMAR: Device scope type does not match for 0000:80:03.0 > > This is because the DMAR table reports this device as having scope 2 > (ACPI_DMAR_SCOPE_TYPE_BRIDGE): > > [0A0h 0160 1] Device Scope Entry Type : 02 > [0A1h 0161 1] Entry Length : 08 > [0A2h 0162 2] Reserved : 0000 > [0A4h 0164 1] Enumeration ID : 00 > [0A5h 0165 1] PCI Bus Number : 80 > > [0A6h 0166 2] PCI Path : 03,00 > > but the device has a type 0 PCI header: > > 80:03.0 Bridge [0680]: Intel Corporation Device [8086:2f0d] (rev 02) > 00: 86 80 0d 2f 00 00 10 00 02 00 80 06 10 00 80 00 > 10: 0c 00 c0 00 c0 38 00 00 0c 00 00 00 80 38 00 00 > 20: 00 00 00 c8 00 00 10 c8 00 00 00 00 86 80 00 00 > 30: 00 00 00 00 60 00 00 00 00 00 00 00 ff 01 00 00 > > VT-d works perfectly on this system, so there's no reason to bail out > on initialization due to this apparent scope mismatch. Use the class > 0x0680 ("Other bridge device") as a heuristic for allowing DMAR > initialization for non-bridge PCI devices listed with scope bridge. > > Signed-off-by: Roland Dreier <[email protected]> > --- > drivers/iommu/dmar.c | 16 ++++++++++++++-- > 1 file changed, 14 insertions(+), 2 deletions(-)
Applied, thanks.
