the following patch was just integrated into master: commit 88af372fe8b4feb683c9153ab1e79df76cff754b Author: Damien Zammit damien@zamaudio.com Date: Sat Aug 27 00:35:48 2016 +1000
nb/intel/gm45: Fix DMAR table - IOMMU advertisement for ME interfaces
Previously the ME PCI interface (HECI) was being reported as present in the DMAR ACPI table even when ME firmware was missing or the PCI device was hidden and HECI would be unresponsive. Now we check via the PCI config space itself to verify if the HECI is present or not.
Note that this test could fail if ME firmware is present but HECI is disabled in devicetree, because it would not advertise that the HECI exists even though there is a running ME. Perhaps this behaviour is desirable because in this case you won't see the HECI in the lspci tree anyway.
Change-Id: Ib692d476d85236b4886ecf3d6e6814229f441de0 Signed-off-by: Damien Zammit damien@zamaudio.com Reviewed-on: https://review.coreboot.org/16330 Tested-by: build bot (Jenkins) Reviewed-by: Swift Geek swiftgeek@gmail.com Reviewed-by: Nico Huber nico.h@gmx.de
See https://review.coreboot.org/16330 for details.
-gerrit