diff options
| -rw-r--r-- | src/northbridge/intel/gm45/acpi.c | 3 | ||||
| -rw-r--r-- | src/northbridge/intel/gm45/iommu.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/src/northbridge/intel/gm45/acpi.c b/src/northbridge/intel/gm45/acpi.c index 8990c3b140..b90afca8a2 100644 --- a/src/northbridge/intel/gm45/acpi.c +++ b/src/northbridge/intel/gm45/acpi.c @@ -72,7 +72,8 @@ unsigned long acpi_fill_mcfg(unsigned long current) static unsigned long acpi_fill_dmar(unsigned long current) { - int me_active = (dev_find_slot(0, PCI_DEVFN(3, 0)) != NULL); + int me_active = (dev_find_slot(0, PCI_DEVFN(3, 0)) != NULL) && + (pci_read_config8(dev_find_slot(0, PCI_DEVFN(3, 0)), PCI_CLASS_REVISION) != 0xff); int stepping = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), PCI_CLASS_REVISION); unsigned long tmp = current; diff --git a/src/northbridge/intel/gm45/iommu.c b/src/northbridge/intel/gm45/iommu.c index 10548f48a3..0c3c18ef0c 100644 --- a/src/northbridge/intel/gm45/iommu.c +++ b/src/northbridge/intel/gm45/iommu.c @@ -40,6 +40,8 @@ void init_iommu() } if (me_active) { MCHBAR32(0x10) = IOMMU_BASE3 | 1; /* ME @ 0:3.0-3 */ + } else { + MCHBAR32(0x10) = 0; /* disable IOMMU for ME */ } MCHBAR32(0x20) = IOMMU_BASE4 | 1; /* all other DMA sources */ |